Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

37 files changed, 15533 insertions, 0 deletions

diff --git a/drivers/bus/Kconfig b/drivers/bus/Kconfig
new file mode 100644
index 000000000..1851112cc
--- /dev/null
+++ b/drivers/bus/Kconfig
@@ -0,0 +1,186 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Bus Devices
+#
+
+menu "Bus devices"
+
+config ARM_CCI
+	bool
+
+config ARM_CCI400_COMMON
+	bool
+	select ARM_CCI
+
+config ARM_CCI400_PORT_CTRL
+	bool
+	depends on ARM && OF && CPU_V7
+	select ARM_CCI400_COMMON
+	help
+	  Low level power management driver for CCI400 cache coherent
+	  interconnect for ARM platforms.
+
+config BRCMSTB_GISB_ARB
+	bool "Broadcom STB GISB bus arbiter"
+	depends on ARM || ARM64 || MIPS
+	default ARCH_BRCMSTB || BMIPS_GENERIC
+	help
+	  Driver for the Broadcom Set Top Box System-on-a-chip internal bus
+	  arbiter. This driver provides timeout and target abort error handling
+	  and internal bus master decoding.
+
+config HISILICON_LPC
+	bool "Support for ISA I/O space on HiSilicon Hip06/7"
+	depends on ARM64 && (ARCH_HISI || COMPILE_TEST)
+	select INDIRECT_PIO
+	help
+	  Driver to enable I/O access to devices attached to the Low Pin
+	  Count bus on the HiSilicon Hip06/7 SoC.
+
+config IMX_WEIM
+	bool "Freescale EIM DRIVER"
+	depends on ARCH_MXC
+	help
+	  Driver for i.MX WEIM controller.
+	  The WEIM(Wireless External Interface Module) works like a bus.
+	  You can attach many different devices on it, such as NOR, onenand.
+
+config MIPS_CDMM
+	bool "MIPS Common Device Memory Map (CDMM) Driver"
+	depends on CPU_MIPSR2
+	help
+	  Driver needed for the MIPS Common Device Memory Map bus in MIPS
+	  cores. This bus is for per-CPU tightly coupled devices such as the
+	  Fast Debug Channel (FDC).
+
+	  For this to work, either your bootloader needs to enable the CDMM
+	  region at an unused physical address on the boot CPU, or else your
+	  platform code needs to implement mips_cdmm_phys_base() (see
+	  asm/cdmm.h).
+
+config MVEBU_MBUS
+	bool
+	depends on PLAT_ORION
+	help
+	  Driver needed for the MBus configuration on Marvell EBU SoCs
+	  (Kirkwood, Dove, Orion5x, MV78XX0 and Armada 370/XP).
+
+config OMAP_INTERCONNECT
+	tristate "OMAP INTERCONNECT DRIVER"
+	depends on ARCH_OMAP2PLUS
+
+	help
+	  Driver to enable OMAP interconnect error handling driver.
+
+config OMAP_OCP2SCP
+	tristate "OMAP OCP2SCP DRIVER"
+	depends on ARCH_OMAP2PLUS
+	help
+	  Driver to enable ocp2scp module which transforms ocp interface
+	  protocol to scp protocol. In OMAP4, USB PHY is connected via
+	  OCP2SCP and in OMAP5, both USB PHY and SATA PHY is connected via
+	  OCP2SCP.
+
+config QCOM_EBI2
+	bool "Qualcomm External Bus Interface 2 (EBI2)"
+	depends on HAS_IOMEM
+	depends on ARCH_QCOM || COMPILE_TEST
+	default ARCH_QCOM
+	help
+	  Say y here to enable support for the Qualcomm External Bus
+	  Interface 2, which can be used to connect things like NAND Flash,
+	  SRAM, ethernet adapters, FPGAs and LCD displays.
+
+config SIMPLE_PM_BUS
+	tristate "Simple Power-Managed Bus Driver"
+	depends on OF && PM
+	help
+	  Driver for transparent busses that don't need a real driver, but
+	  where the bus controller is part of a PM domain, or under the control
+	  of a functional clock, and thus relies on runtime PM for managing
+	  this PM domain and/or clock.
+	  An example of such a bus controller is the Renesas Bus State
+	  Controller (BSC, sometimes called "LBSC within Bus Bridge", or
+	  "External Bus Interface") as found on several Renesas ARM SoCs.
+
+config SUN50I_DE2_BUS
+	bool "Allwinner A64 DE2 Bus Driver"
+	  default ARM64
+	  depends on ARCH_SUNXI
+	  select SUNXI_SRAM
+	  help
+	  Say y here to enable support for Allwinner A64 DE2 bus driver. It's
+	  mostly transparent, but a SRAM region needs to be claimed in the SRAM
+	  controller to make the all blocks in the DE2 part accessible.
+
+config SUNXI_RSB
+	tristate "Allwinner sunXi Reduced Serial Bus Driver"
+	  default MACH_SUN8I || MACH_SUN9I || ARM64
+	  depends on ARCH_SUNXI
+	  select REGMAP
+	  help
+	  Say y here to enable support for Allwinner's Reduced Serial Bus
+	  (RSB) support. This controller is responsible for communicating
+	  with various RSB based devices, such as AXP223, AXP8XX PMICs,
+	  and AC100/AC200 ICs.
+
+config TEGRA_ACONNECT
+	tristate "Tegra ACONNECT Bus Driver"
+	depends on ARCH_TEGRA_210_SOC
+	depends on OF && PM
+	select PM_CLK
+	help
+	  Driver for the Tegra ACONNECT bus which is used to interface with
+	  the devices inside the Audio Processing Engine (APE) for Tegra210.
+
+config TEGRA_GMI
+	tristate "Tegra Generic Memory Interface bus driver"
+	depends on ARCH_TEGRA
+	help
+	  Driver for the Tegra Generic Memory Interface bus which can be used
+	  to attach devices such as NOR, UART, FPGA and more.
+
+config TI_SYSC
+	bool "TI sysc interconnect target module driver"
+	depends on ARCH_OMAP2PLUS
+	help
+	  Generic driver for Texas Instruments interconnect target module
+	  found on many TI SoCs.
+
+config TS_NBUS
+	tristate "Technologic Systems NBUS Driver"
+	depends on SOC_IMX28
+	depends on OF_GPIO && PWM
+	help
+	  Driver for the Technologic Systems NBUS which is used to interface
+	  with the peripherals in the FPGA of the TS-4600 SoM.
+
+config UNIPHIER_SYSTEM_BUS
+	tristate "UniPhier System Bus driver"
+	depends on ARCH_UNIPHIER && OF
+	default y
+	help
+	  Support for UniPhier System Bus, a simple external bus.  This is
+	  needed to use on-board devices connected to UniPhier SoCs.
+
+config VEXPRESS_CONFIG
+	bool "Versatile Express configuration bus"
+	default y if ARCH_VEXPRESS
+	depends on ARM || ARM64
+	depends on OF
+	select REGMAP
+	help
+	  Platform configuration infrastructure for the ARM Ltd.
+	  Versatile Express.
+
+config DA8XX_MSTPRI
+	bool "TI da8xx master peripheral priority driver"
+	depends on ARCH_DAVINCI_DA8XX
+	help
+	  Driver for Texas Instruments da8xx master peripheral priority
+	  configuration. Allows to adjust the priorities of all master
+	  peripherals.
+
+source "drivers/bus/fsl-mc/Kconfig"
+
+endmenu
diff --git a/drivers/bus/Makefile b/drivers/bus/Makefile
new file mode 100644
index 000000000..ca300b191
--- /dev/null
+++ b/drivers/bus/Makefile
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the bus drivers.
+#
+
+# Interconnect bus drivers for ARM platforms
+obj-$(CONFIG_ARM_CCI)		+= arm-cci.o
+
+obj-$(CONFIG_HISILICON_LPC)	+= hisi_lpc.o
+obj-$(CONFIG_BRCMSTB_GISB_ARB)	+= brcmstb_gisb.o
+
+# DPAA2 fsl-mc bus
+obj-$(CONFIG_FSL_MC_BUS)	+= fsl-mc/
+
+obj-$(CONFIG_IMX_WEIM)		+= imx-weim.o
+obj-$(CONFIG_MIPS_CDMM)		+= mips_cdmm.o
+obj-$(CONFIG_MVEBU_MBUS) 	+= mvebu-mbus.o
+
+# Interconnect bus driver for OMAP SoCs.
+obj-$(CONFIG_OMAP_INTERCONNECT)	+= omap_l3_smx.o omap_l3_noc.o
+
+obj-$(CONFIG_OMAP_OCP2SCP)	+= omap-ocp2scp.o
+obj-$(CONFIG_QCOM_EBI2)		+= qcom-ebi2.o
+obj-$(CONFIG_SUN50I_DE2_BUS)	+= sun50i-de2.o
+obj-$(CONFIG_SUNXI_RSB)		+= sunxi-rsb.o
+obj-$(CONFIG_SIMPLE_PM_BUS)	+= simple-pm-bus.o
+obj-$(CONFIG_TEGRA_ACONNECT)	+= tegra-aconnect.o
+obj-$(CONFIG_TEGRA_GMI)		+= tegra-gmi.o
+obj-$(CONFIG_TI_SYSC)		+= ti-sysc.o
+obj-$(CONFIG_TS_NBUS)		+= ts-nbus.o
+obj-$(CONFIG_UNIPHIER_SYSTEM_BUS)	+= uniphier-system-bus.o
+obj-$(CONFIG_VEXPRESS_CONFIG)	+= vexpress-config.o
+
+obj-$(CONFIG_DA8XX_MSTPRI)	+= da8xx-mstpri.o
diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c
new file mode 100644
index 000000000..b8184a903
--- /dev/null
+++ b/drivers/bus/arm-cci.c
@@ -0,0 +1,587 @@
+/*
+ * CCI cache coherent interconnect driver
+ *
+ * Copyright (C) 2013 ARM Ltd.
+ * Author: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/arm-cci.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/cacheflush.h>
+#include <asm/smp_plat.h>
+
+static void __iomem *cci_ctrl_base __ro_after_init;
+static unsigned long cci_ctrl_phys __ro_after_init;
+
+#ifdef CONFIG_ARM_CCI400_PORT_CTRL
+struct cci_nb_ports {
+	unsigned int nb_ace;
+	unsigned int nb_ace_lite;
+};
+
+static const struct cci_nb_ports cci400_ports = {
+	.nb_ace = 2,
+	.nb_ace_lite = 3
+};
+
+#define CCI400_PORTS_DATA	(&cci400_ports)
+#else
+#define CCI400_PORTS_DATA	(NULL)
+#endif
+
+static const struct of_device_id arm_cci_matches[] = {
+#ifdef CONFIG_ARM_CCI400_COMMON
+	{.compatible = "arm,cci-400", .data = CCI400_PORTS_DATA },
+#endif
+#ifdef CONFIG_ARM_CCI5xx_PMU
+	{ .compatible = "arm,cci-500", },
+	{ .compatible = "arm,cci-550", },
+#endif
+	{},
+};
+
+static const struct of_dev_auxdata arm_cci_auxdata[] = {
+	OF_DEV_AUXDATA("arm,cci-400-pmu", 0, NULL, &cci_ctrl_base),
+	OF_DEV_AUXDATA("arm,cci-400-pmu,r0", 0, NULL, &cci_ctrl_base),
+	OF_DEV_AUXDATA("arm,cci-400-pmu,r1", 0, NULL, &cci_ctrl_base),
+	OF_DEV_AUXDATA("arm,cci-500-pmu,r0", 0, NULL, &cci_ctrl_base),
+	OF_DEV_AUXDATA("arm,cci-550-pmu,r0", 0, NULL, &cci_ctrl_base),
+	{}
+};
+
+#define DRIVER_NAME		"ARM-CCI"
+
+static int cci_platform_probe(struct platform_device *pdev)
+{
+	if (!cci_probed())
+		return -ENODEV;
+
+	return of_platform_populate(pdev->dev.of_node, NULL,
+				    arm_cci_auxdata, &pdev->dev);
+}
+
+static struct platform_driver cci_platform_driver = {
+	.driver = {
+		   .name = DRIVER_NAME,
+		   .of_match_table = arm_cci_matches,
+		  },
+	.probe = cci_platform_probe,
+};
+
+static int __init cci_platform_init(void)
+{
+	return platform_driver_register(&cci_platform_driver);
+}
+
+#ifdef CONFIG_ARM_CCI400_PORT_CTRL
+
+#define CCI_PORT_CTRL		0x0
+#define CCI_CTRL_STATUS		0xc
+
+#define CCI_ENABLE_SNOOP_REQ	0x1
+#define CCI_ENABLE_DVM_REQ	0x2
+#define CCI_ENABLE_REQ		(CCI_ENABLE_SNOOP_REQ | CCI_ENABLE_DVM_REQ)
+
+enum cci_ace_port_type {
+	ACE_INVALID_PORT = 0x0,
+	ACE_PORT,
+	ACE_LITE_PORT,
+};
+
+struct cci_ace_port {
+	void __iomem *base;
+	unsigned long phys;
+	enum cci_ace_port_type type;
+	struct device_node *dn;
+};
+
+static struct cci_ace_port *ports;
+static unsigned int nb_cci_ports;
+
+struct cpu_port {
+	u64 mpidr;
+	u32 port;
+};
+
+/*
+ * Use the port MSB as valid flag, shift can be made dynamic
+ * by computing number of bits required for port indexes.
+ * Code disabling CCI cpu ports runs with D-cache invalidated
+ * and SCTLR bit clear so data accesses must be kept to a minimum
+ * to improve performance; for now shift is left static to
+ * avoid one more data access while disabling the CCI port.
+ */
+#define PORT_VALID_SHIFT	31
+#define PORT_VALID		(0x1 << PORT_VALID_SHIFT)
+
+static inline void init_cpu_port(struct cpu_port *port, u32 index, u64 mpidr)
+{
+	port->port = PORT_VALID | index;
+	port->mpidr = mpidr;
+}
+
+static inline bool cpu_port_is_valid(struct cpu_port *port)
+{
+	return !!(port->port & PORT_VALID);
+}
+
+static inline bool cpu_port_match(struct cpu_port *port, u64 mpidr)
+{
+	return port->mpidr == (mpidr & MPIDR_HWID_BITMASK);
+}
+
+static struct cpu_port cpu_port[NR_CPUS];
+
+/**
+ * __cci_ace_get_port - Function to retrieve the port index connected to
+ *			a cpu or device.
+ *
+ * @dn: device node of the device to look-up
+ * @type: port type
+ *
+ * Return value:
+ *	- CCI port index if success
+ *	- -ENODEV if failure
+ */
+static int __cci_ace_get_port(struct device_node *dn, int type)
+{
+	int i;
+	bool ace_match;
+	struct device_node *cci_portn;
+
+	cci_portn = of_parse_phandle(dn, "cci-control-port", 0);
+	for (i = 0; i < nb_cci_ports; i++) {
+		ace_match = ports[i].type == type;
+		if (ace_match && cci_portn == ports[i].dn)
+			return i;
+	}
+	return -ENODEV;
+}
+
+int cci_ace_get_port(struct device_node *dn)
+{
+	return __cci_ace_get_port(dn, ACE_LITE_PORT);
+}
+EXPORT_SYMBOL_GPL(cci_ace_get_port);
+
+static void cci_ace_init_ports(void)
+{
+	int port, cpu;
+	struct device_node *cpun;
+
+	/*
+	 * Port index look-up speeds up the function disabling ports by CPU,
+	 * since the logical to port index mapping is done once and does
+	 * not change after system boot.
+	 * The stashed index array is initialized for all possible CPUs
+	 * at probe time.
+	 */
+	for_each_possible_cpu(cpu) {
+		/* too early to use cpu->of_node */
+		cpun = of_get_cpu_node(cpu, NULL);
+
+		if (WARN(!cpun, "Missing cpu device node\n"))
+			continue;
+
+		port = __cci_ace_get_port(cpun, ACE_PORT);
+		if (port < 0)
+			continue;
+
+		init_cpu_port(&cpu_port[cpu], port, cpu_logical_map(cpu));
+	}
+
+	for_each_possible_cpu(cpu) {
+		WARN(!cpu_port_is_valid(&cpu_port[cpu]),
+			"CPU %u does not have an associated CCI port\n",
+			cpu);
+	}
+}
+/*
+ * Functions to enable/disable a CCI interconnect slave port
+ *
+ * They are called by low-level power management code to disable slave
+ * interfaces snoops and DVM broadcast.
+ * Since they may execute with cache data allocation disabled and
+ * after the caches have been cleaned and invalidated the functions provide
+ * no explicit locking since they may run with D-cache disabled, so normal
+ * cacheable kernel locks based on ldrex/strex may not work.
+ * Locking has to be provided by BSP implementations to ensure proper
+ * operations.
+ */
+
+/**
+ * cci_port_control() - function to control a CCI port
+ *
+ * @port: index of the port to setup
+ * @enable: if true enables the port, if false disables it
+ */
+static void notrace cci_port_control(unsigned int port, bool enable)
+{
+	void __iomem *base = ports[port].base;
+
+	writel_relaxed(enable ? CCI_ENABLE_REQ : 0, base + CCI_PORT_CTRL);
+	/*
+	 * This function is called from power down procedures
+	 * and must not execute any instruction that might
+	 * cause the processor to be put in a quiescent state
+	 * (eg wfi). Hence, cpu_relax() can not be added to this
+	 * read loop to optimize power, since it might hide possibly
+	 * disruptive operations.
+	 */
+	while (readl_relaxed(cci_ctrl_base + CCI_CTRL_STATUS) & 0x1)
+			;
+}
+
+/**
+ * cci_disable_port_by_cpu() - function to disable a CCI port by CPU
+ *			       reference
+ *
+ * @mpidr: mpidr of the CPU whose CCI port should be disabled
+ *
+ * Disabling a CCI port for a CPU implies disabling the CCI port
+ * controlling that CPU cluster. Code disabling CPU CCI ports
+ * must make sure that the CPU running the code is the last active CPU
+ * in the cluster ie all other CPUs are quiescent in a low power state.
+ *
+ * Return:
+ *	0 on success
+ *	-ENODEV on port look-up failure
+ */
+int notrace cci_disable_port_by_cpu(u64 mpidr)
+{
+	int cpu;
+	bool is_valid;
+	for (cpu = 0; cpu < nr_cpu_ids; cpu++) {
+		is_valid = cpu_port_is_valid(&cpu_port[cpu]);
+		if (is_valid && cpu_port_match(&cpu_port[cpu], mpidr)) {
+			cci_port_control(cpu_port[cpu].port, false);
+			return 0;
+		}
+	}
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(cci_disable_port_by_cpu);
+
+/**
+ * cci_enable_port_for_self() - enable a CCI port for calling CPU
+ *
+ * Enabling a CCI port for the calling CPU implies enabling the CCI
+ * port controlling that CPU's cluster. Caller must make sure that the
+ * CPU running the code is the first active CPU in the cluster and all
+ * other CPUs are quiescent in a low power state  or waiting for this CPU
+ * to complete the CCI initialization.
+ *
+ * Because this is called when the MMU is still off and with no stack,
+ * the code must be position independent and ideally rely on callee
+ * clobbered registers only.  To achieve this we must code this function
+ * entirely in assembler.
+ *
+ * On success this returns with the proper CCI port enabled.  In case of
+ * any failure this never returns as the inability to enable the CCI is
+ * fatal and there is no possible recovery at this stage.
+ */
+asmlinkage void __naked cci_enable_port_for_self(void)
+{
+	asm volatile ("\n"
+"	.arch armv7-a\n"
+"	mrc	p15, 0, r0, c0, c0, 5	@ get MPIDR value \n"
+"	and	r0, r0, #"__stringify(MPIDR_HWID_BITMASK)" \n"
+"	adr	r1, 5f \n"
+"	ldr	r2, [r1] \n"
+"	add	r1, r1, r2		@ &cpu_port \n"
+"	add	ip, r1, %[sizeof_cpu_port] \n"
+
+	/* Loop over the cpu_port array looking for a matching MPIDR */
+"1:	ldr	r2, [r1, %[offsetof_cpu_port_mpidr_lsb]] \n"
+"	cmp	r2, r0 			@ compare MPIDR \n"
+"	bne	2f \n"
+
+	/* Found a match, now test port validity */
+"	ldr	r3, [r1, %[offsetof_cpu_port_port]] \n"
+"	tst	r3, #"__stringify(PORT_VALID)" \n"
+"	bne	3f \n"
+
+	/* no match, loop with the next cpu_port entry */
+"2:	add	r1, r1, %[sizeof_struct_cpu_port] \n"
+"	cmp	r1, ip			@ done? \n"
+"	blo	1b \n"
+
+	/* CCI port not found -- cheaply try to stall this CPU */
+"cci_port_not_found: \n"
+"	wfi \n"
+"	wfe \n"
+"	b	cci_port_not_found \n"
+
+	/* Use matched port index to look up the corresponding ports entry */
+"3:	bic	r3, r3, #"__stringify(PORT_VALID)" \n"
+"	adr	r0, 6f \n"
+"	ldmia	r0, {r1, r2} \n"
+"	sub	r1, r1, r0 		@ virt - phys \n"
+"	ldr	r0, [r0, r2] 		@ *(&ports) \n"
+"	mov	r2, %[sizeof_struct_ace_port] \n"
+"	mla	r0, r2, r3, r0		@ &ports[index] \n"
+"	sub	r0, r0, r1		@ virt_to_phys() \n"
+
+	/* Enable the CCI port */
+"	ldr	r0, [r0, %[offsetof_port_phys]] \n"
+"	mov	r3, %[cci_enable_req]\n"		   
+"	str	r3, [r0, #"__stringify(CCI_PORT_CTRL)"] \n"
+
+	/* poll the status reg for completion */
+"	adr	r1, 7f \n"
+"	ldr	r0, [r1] \n"
+"	ldr	r0, [r0, r1]		@ cci_ctrl_base \n"
+"4:	ldr	r1, [r0, #"__stringify(CCI_CTRL_STATUS)"] \n"
+"	tst	r1, %[cci_control_status_bits] \n"			
+"	bne	4b \n"
+
+"	mov	r0, #0 \n"
+"	bx	lr \n"
+
+"	.align	2 \n"
+"5:	.word	cpu_port - . \n"
+"6:	.word	. \n"
+"	.word	ports - 6b \n"
+"7:	.word	cci_ctrl_phys - . \n"
+	: :
+	[sizeof_cpu_port] "i" (sizeof(cpu_port)),
+	[cci_enable_req] "i" cpu_to_le32(CCI_ENABLE_REQ),
+	[cci_control_status_bits] "i" cpu_to_le32(1),
+#ifndef __ARMEB__
+	[offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)),
+#else
+	[offsetof_cpu_port_mpidr_lsb] "i" (offsetof(struct cpu_port, mpidr)+4),
+#endif
+	[offsetof_cpu_port_port] "i" (offsetof(struct cpu_port, port)),
+	[sizeof_struct_cpu_port] "i" (sizeof(struct cpu_port)),
+	[sizeof_struct_ace_port] "i" (sizeof(struct cci_ace_port)),
+	[offsetof_port_phys] "i" (offsetof(struct cci_ace_port, phys)) );
+}
+
+/**
+ * __cci_control_port_by_device() - function to control a CCI port by device
+ *				    reference
+ *
+ * @dn: device node pointer of the device whose CCI port should be
+ *      controlled
+ * @enable: if true enables the port, if false disables it
+ *
+ * Return:
+ *	0 on success
+ *	-ENODEV on port look-up failure
+ */
+int notrace __cci_control_port_by_device(struct device_node *dn, bool enable)
+{
+	int port;
+
+	if (!dn)
+		return -ENODEV;
+
+	port = __cci_ace_get_port(dn, ACE_LITE_PORT);
+	if (WARN_ONCE(port < 0, "node %pOF ACE lite port look-up failure\n",
+				dn))
+		return -ENODEV;
+	cci_port_control(port, enable);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__cci_control_port_by_device);
+
+/**
+ * __cci_control_port_by_index() - function to control a CCI port by port index
+ *
+ * @port: port index previously retrieved with cci_ace_get_port()
+ * @enable: if true enables the port, if false disables it
+ *
+ * Return:
+ *	0 on success
+ *	-ENODEV on port index out of range
+ *	-EPERM if operation carried out on an ACE PORT
+ */
+int notrace __cci_control_port_by_index(u32 port, bool enable)
+{
+	if (port >= nb_cci_ports || ports[port].type == ACE_INVALID_PORT)
+		return -ENODEV;
+	/*
+	 * CCI control for ports connected to CPUS is extremely fragile
+	 * and must be made to go through a specific and controlled
+	 * interface (ie cci_disable_port_by_cpu(); control by general purpose
+	 * indexing is therefore disabled for ACE ports.
+	 */
+	if (ports[port].type == ACE_PORT)
+		return -EPERM;
+
+	cci_port_control(port, enable);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__cci_control_port_by_index);
+
+static const struct of_device_id arm_cci_ctrl_if_matches[] = {
+	{.compatible = "arm,cci-400-ctrl-if", },
+	{},
+};
+
+static int cci_probe_ports(struct device_node *np)
+{
+	struct cci_nb_ports const *cci_config;
+	int ret, i, nb_ace = 0, nb_ace_lite = 0;
+	struct device_node *cp;
+	struct resource res;
+	const char *match_str;
+	bool is_ace;
+
+
+	cci_config = of_match_node(arm_cci_matches, np)->data;
+	if (!cci_config)
+		return -ENODEV;
+
+	nb_cci_ports = cci_config->nb_ace + cci_config->nb_ace_lite;
+
+	ports = kcalloc(nb_cci_ports, sizeof(*ports), GFP_KERNEL);
+	if (!ports)
+		return -ENOMEM;
+
+	for_each_available_child_of_node(np, cp) {
+		if (!of_match_node(arm_cci_ctrl_if_matches, cp))
+			continue;
+
+		i = nb_ace + nb_ace_lite;
+
+		if (i >= nb_cci_ports)
+			break;
+
+		if (of_property_read_string(cp, "interface-type",
+					&match_str)) {
+			WARN(1, "node %pOF missing interface-type property\n",
+				  cp);
+			continue;
+		}
+		is_ace = strcmp(match_str, "ace") == 0;
+		if (!is_ace && strcmp(match_str, "ace-lite")) {
+			WARN(1, "node %pOF containing invalid interface-type property, skipping it\n",
+					cp);
+			continue;
+		}
+
+		ret = of_address_to_resource(cp, 0, &res);
+		if (!ret) {
+			ports[i].base = ioremap(res.start, resource_size(&res));
+			ports[i].phys = res.start;
+		}
+		if (ret || !ports[i].base) {
+			WARN(1, "unable to ioremap CCI port %d\n", i);
+			continue;
+		}
+
+		if (is_ace) {
+			if (WARN_ON(nb_ace >= cci_config->nb_ace))
+				continue;
+			ports[i].type = ACE_PORT;
+			++nb_ace;
+		} else {
+			if (WARN_ON(nb_ace_lite >= cci_config->nb_ace_lite))
+				continue;
+			ports[i].type = ACE_LITE_PORT;
+			++nb_ace_lite;
+		}
+		ports[i].dn = cp;
+	}
+
+	/*
+	 * If there is no CCI port that is under kernel control
+	 * return early and report probe status.
+	 */
+	if (!nb_ace && !nb_ace_lite)
+		return -ENODEV;
+
+	 /* initialize a stashed array of ACE ports to speed-up look-up */
+	cci_ace_init_ports();
+
+	/*
+	 * Multi-cluster systems may need this data when non-coherent, during
+	 * cluster power-up/power-down. Make sure it reaches main memory.
+	 */
+	sync_cache_w(&cci_ctrl_base);
+	sync_cache_w(&cci_ctrl_phys);
+	sync_cache_w(&ports);
+	sync_cache_w(&cpu_port);
+	__sync_cache_range_w(ports, sizeof(*ports) * nb_cci_ports);
+	pr_info("ARM CCI driver probed\n");
+
+	return 0;
+}
+#else /* !CONFIG_ARM_CCI400_PORT_CTRL */
+static inline int cci_probe_ports(struct device_node *np)
+{
+	return 0;
+}
+#endif /* CONFIG_ARM_CCI400_PORT_CTRL */
+
+static int cci_probe(void)
+{
+	int ret;
+	struct device_node *np;
+	struct resource res;
+
+	np = of_find_matching_node(NULL, arm_cci_matches);
+	if (!of_device_is_available(np))
+		return -ENODEV;
+
+	ret = of_address_to_resource(np, 0, &res);
+	if (!ret) {
+		cci_ctrl_base = ioremap(res.start, resource_size(&res));
+		cci_ctrl_phys =	res.start;
+	}
+	if (ret || !cci_ctrl_base) {
+		WARN(1, "unable to ioremap CCI ctrl\n");
+		return -ENXIO;
+	}
+
+	return cci_probe_ports(np);
+}
+
+static int cci_init_status = -EAGAIN;
+static DEFINE_MUTEX(cci_probing);
+
+static int cci_init(void)
+{
+	if (cci_init_status != -EAGAIN)
+		return cci_init_status;
+
+	mutex_lock(&cci_probing);
+	if (cci_init_status == -EAGAIN)
+		cci_init_status = cci_probe();
+	mutex_unlock(&cci_probing);
+	return cci_init_status;
+}
+
+/*
+ * To sort out early init calls ordering a helper function is provided to
+ * check if the CCI driver has beed initialized. Function check if the driver
+ * has been initialized, if not it calls the init function that probes
+ * the driver and updates the return value.
+ */
+bool cci_probed(void)
+{
+	return cci_init() == 0;
+}
+EXPORT_SYMBOL_GPL(cci_probed);
+
+early_initcall(cci_init);
+core_initcall(cci_platform_init);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ARM CCI support");
diff --git a/drivers/bus/brcmstb_gisb.c b/drivers/bus/brcmstb_gisb.c
new file mode 100644
index 000000000..68ac3e93b
--- /dev/null
+++ b/drivers/bus/brcmstb_gisb.c
@@ -0,0 +1,465 @@
+/*
+ * Copyright (C) 2014-2017 Broadcom
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/sysfs.h>
+#include <linux/io.h>
+#include <linux/string.h>
+#include <linux/device.h>
+#include <linux/list.h>
+#include <linux/of.h>
+#include <linux/bitops.h>
+#include <linux/pm.h>
+#include <linux/kernel.h>
+#include <linux/kdebug.h>
+#include <linux/notifier.h>
+
+#ifdef CONFIG_MIPS
+#include <asm/traps.h>
+#endif
+
+#define  ARB_ERR_CAP_CLEAR		(1 << 0)
+#define  ARB_ERR_CAP_STATUS_TIMEOUT	(1 << 12)
+#define  ARB_ERR_CAP_STATUS_TEA		(1 << 11)
+#define  ARB_ERR_CAP_STATUS_WRITE	(1 << 1)
+#define  ARB_ERR_CAP_STATUS_VALID	(1 << 0)
+
+enum {
+	ARB_TIMER,
+	ARB_ERR_CAP_CLR,
+	ARB_ERR_CAP_HI_ADDR,
+	ARB_ERR_CAP_ADDR,
+	ARB_ERR_CAP_STATUS,
+	ARB_ERR_CAP_MASTER,
+};
+
+static const int gisb_offsets_bcm7038[] = {
+	[ARB_TIMER]		= 0x00c,
+	[ARB_ERR_CAP_CLR]	= 0x0c4,
+	[ARB_ERR_CAP_HI_ADDR]	= -1,
+	[ARB_ERR_CAP_ADDR]	= 0x0c8,
+	[ARB_ERR_CAP_STATUS]	= 0x0d0,
+	[ARB_ERR_CAP_MASTER]	= -1,
+};
+
+static const int gisb_offsets_bcm7278[] = {
+	[ARB_TIMER]		= 0x008,
+	[ARB_ERR_CAP_CLR]	= 0x7f8,
+	[ARB_ERR_CAP_HI_ADDR]	= -1,
+	[ARB_ERR_CAP_ADDR]	= 0x7e0,
+	[ARB_ERR_CAP_STATUS]	= 0x7f0,
+	[ARB_ERR_CAP_MASTER]	= 0x7f4,
+};
+
+static const int gisb_offsets_bcm7400[] = {
+	[ARB_TIMER]		= 0x00c,
+	[ARB_ERR_CAP_CLR]	= 0x0c8,
+	[ARB_ERR_CAP_HI_ADDR]	= -1,
+	[ARB_ERR_CAP_ADDR]	= 0x0cc,
+	[ARB_ERR_CAP_STATUS]	= 0x0d4,
+	[ARB_ERR_CAP_MASTER]	= 0x0d8,
+};
+
+static const int gisb_offsets_bcm7435[] = {
+	[ARB_TIMER]		= 0x00c,
+	[ARB_ERR_CAP_CLR]	= 0x168,
+	[ARB_ERR_CAP_HI_ADDR]	= -1,
+	[ARB_ERR_CAP_ADDR]	= 0x16c,
+	[ARB_ERR_CAP_STATUS]	= 0x174,
+	[ARB_ERR_CAP_MASTER]	= 0x178,
+};
+
+static const int gisb_offsets_bcm7445[] = {
+	[ARB_TIMER]		= 0x008,
+	[ARB_ERR_CAP_CLR]	= 0x7e4,
+	[ARB_ERR_CAP_HI_ADDR]	= 0x7e8,
+	[ARB_ERR_CAP_ADDR]	= 0x7ec,
+	[ARB_ERR_CAP_STATUS]	= 0x7f4,
+	[ARB_ERR_CAP_MASTER]	= 0x7f8,
+};
+
+struct brcmstb_gisb_arb_device {
+	void __iomem	*base;
+	const int	*gisb_offsets;
+	bool		big_endian;
+	struct mutex	lock;
+	struct list_head next;
+	u32 valid_mask;
+	const char *master_names[sizeof(u32) * BITS_PER_BYTE];
+	u32 saved_timeout;
+};
+
+static LIST_HEAD(brcmstb_gisb_arb_device_list);
+
+static u32 gisb_read(struct brcmstb_gisb_arb_device *gdev, int reg)
+{
+	int offset = gdev->gisb_offsets[reg];
+
+	if (offset < 0) {
+		/* return 1 if the hardware doesn't have ARB_ERR_CAP_MASTER */
+		if (reg == ARB_ERR_CAP_MASTER)
+			return 1;
+		else
+			return 0;
+	}
+
+	if (gdev->big_endian)
+		return ioread32be(gdev->base + offset);
+	else
+		return ioread32(gdev->base + offset);
+}
+
+static u64 gisb_read_address(struct brcmstb_gisb_arb_device *gdev)
+{
+	u64 value;
+
+	value = gisb_read(gdev, ARB_ERR_CAP_ADDR);
+	value |= (u64)gisb_read(gdev, ARB_ERR_CAP_HI_ADDR) << 32;
+
+	return value;
+}
+
+static void gisb_write(struct brcmstb_gisb_arb_device *gdev, u32 val, int reg)
+{
+	int offset = gdev->gisb_offsets[reg];
+
+	if (offset == -1)
+		return;
+
+	if (gdev->big_endian)
+		iowrite32be(val, gdev->base + offset);
+	else
+		iowrite32(val, gdev->base + offset);
+}
+
+static ssize_t gisb_arb_get_timeout(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
+	u32 timeout;
+
+	mutex_lock(&gdev->lock);
+	timeout = gisb_read(gdev, ARB_TIMER);
+	mutex_unlock(&gdev->lock);
+
+	return sprintf(buf, "%d", timeout);
+}
+
+static ssize_t gisb_arb_set_timeout(struct device *dev,
+				    struct device_attribute *attr,
+				    const char *buf, size_t count)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
+	int val, ret;
+
+	ret = kstrtoint(buf, 10, &val);
+	if (ret < 0)
+		return ret;
+
+	if (val == 0 || val >= 0xffffffff)
+		return -EINVAL;
+
+	mutex_lock(&gdev->lock);
+	gisb_write(gdev, val, ARB_TIMER);
+	mutex_unlock(&gdev->lock);
+
+	return count;
+}
+
+static const char *
+brcmstb_gisb_master_to_str(struct brcmstb_gisb_arb_device *gdev,
+						u32 masters)
+{
+	u32 mask = gdev->valid_mask & masters;
+
+	if (hweight_long(mask) != 1)
+		return NULL;
+
+	return gdev->master_names[ffs(mask) - 1];
+}
+
+static int brcmstb_gisb_arb_decode_addr(struct brcmstb_gisb_arb_device *gdev,
+					const char *reason)
+{
+	u32 cap_status;
+	u64 arb_addr;
+	u32 master;
+	const char *m_name;
+	char m_fmt[11];
+
+	cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
+
+	/* Invalid captured address, bail out */
+	if (!(cap_status & ARB_ERR_CAP_STATUS_VALID))
+		return 1;
+
+	/* Read the address and master */
+	arb_addr = gisb_read_address(gdev);
+	master = gisb_read(gdev, ARB_ERR_CAP_MASTER);
+
+	m_name = brcmstb_gisb_master_to_str(gdev, master);
+	if (!m_name) {
+		snprintf(m_fmt, sizeof(m_fmt), "0x%08x", master);
+		m_name = m_fmt;
+	}
+
+	pr_crit("%s: %s at 0x%llx [%c %s], core: %s\n",
+		__func__, reason, arb_addr,
+		cap_status & ARB_ERR_CAP_STATUS_WRITE ? 'W' : 'R',
+		cap_status & ARB_ERR_CAP_STATUS_TIMEOUT ? "timeout" : "",
+		m_name);
+
+	/* clear the GISB error */
+	gisb_write(gdev, ARB_ERR_CAP_CLEAR, ARB_ERR_CAP_CLR);
+
+	return 0;
+}
+
+#ifdef CONFIG_MIPS
+static int brcmstb_bus_error_handler(struct pt_regs *regs, int is_fixup)
+{
+	int ret = 0;
+	struct brcmstb_gisb_arb_device *gdev;
+	u32 cap_status;
+
+	list_for_each_entry(gdev, &brcmstb_gisb_arb_device_list, next) {
+		cap_status = gisb_read(gdev, ARB_ERR_CAP_STATUS);
+
+		/* Invalid captured address, bail out */
+		if (!(cap_status & ARB_ERR_CAP_STATUS_VALID)) {
+			is_fixup = 1;
+			goto out;
+		}
+
+		ret |= brcmstb_gisb_arb_decode_addr(gdev, "bus error");
+	}
+out:
+	return is_fixup ? MIPS_BE_FIXUP : MIPS_BE_FATAL;
+}
+#endif
+
+static irqreturn_t brcmstb_gisb_timeout_handler(int irq, void *dev_id)
+{
+	brcmstb_gisb_arb_decode_addr(dev_id, "timeout");
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t brcmstb_gisb_tea_handler(int irq, void *dev_id)
+{
+	brcmstb_gisb_arb_decode_addr(dev_id, "target abort");
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Dump out gisb errors on die or panic.
+ */
+static int dump_gisb_error(struct notifier_block *self, unsigned long v,
+			   void *p);
+
+static struct notifier_block gisb_die_notifier = {
+	.notifier_call = dump_gisb_error,
+};
+
+static struct notifier_block gisb_panic_notifier = {
+	.notifier_call = dump_gisb_error,
+};
+
+static int dump_gisb_error(struct notifier_block *self, unsigned long v,
+			   void *p)
+{
+	struct brcmstb_gisb_arb_device *gdev;
+	const char *reason = "panic";
+
+	if (self == &gisb_die_notifier)
+		reason = "die";
+
+	/* iterate over each GISB arb registered handlers */
+	list_for_each_entry(gdev, &brcmstb_gisb_arb_device_list, next)
+		brcmstb_gisb_arb_decode_addr(gdev, reason);
+
+	return NOTIFY_DONE;
+}
+
+static DEVICE_ATTR(gisb_arb_timeout, S_IWUSR | S_IRUGO,
+		gisb_arb_get_timeout, gisb_arb_set_timeout);
+
+static struct attribute *gisb_arb_sysfs_attrs[] = {
+	&dev_attr_gisb_arb_timeout.attr,
+	NULL,
+};
+
+static struct attribute_group gisb_arb_sysfs_attr_group = {
+	.attrs = gisb_arb_sysfs_attrs,
+};
+
+static const struct of_device_id brcmstb_gisb_arb_of_match[] = {
+	{ .compatible = "brcm,gisb-arb",         .data = gisb_offsets_bcm7445 },
+	{ .compatible = "brcm,bcm7445-gisb-arb", .data = gisb_offsets_bcm7445 },
+	{ .compatible = "brcm,bcm7435-gisb-arb", .data = gisb_offsets_bcm7435 },
+	{ .compatible = "brcm,bcm7400-gisb-arb", .data = gisb_offsets_bcm7400 },
+	{ .compatible = "brcm,bcm7278-gisb-arb", .data = gisb_offsets_bcm7278 },
+	{ .compatible = "brcm,bcm7038-gisb-arb", .data = gisb_offsets_bcm7038 },
+	{ },
+};
+
+static int __init brcmstb_gisb_arb_probe(struct platform_device *pdev)
+{
+	struct device_node *dn = pdev->dev.of_node;
+	struct brcmstb_gisb_arb_device *gdev;
+	const struct of_device_id *of_id;
+	struct resource *r;
+	int err, timeout_irq, tea_irq;
+	unsigned int num_masters, j = 0;
+	int i, first, last;
+
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	timeout_irq = platform_get_irq(pdev, 0);
+	tea_irq = platform_get_irq(pdev, 1);
+
+	gdev = devm_kzalloc(&pdev->dev, sizeof(*gdev), GFP_KERNEL);
+	if (!gdev)
+		return -ENOMEM;
+
+	mutex_init(&gdev->lock);
+	INIT_LIST_HEAD(&gdev->next);
+
+	gdev->base = devm_ioremap_resource(&pdev->dev, r);
+	if (IS_ERR(gdev->base))
+		return PTR_ERR(gdev->base);
+
+	of_id = of_match_node(brcmstb_gisb_arb_of_match, dn);
+	if (!of_id) {
+		pr_err("failed to look up compatible string\n");
+		return -EINVAL;
+	}
+	gdev->gisb_offsets = of_id->data;
+	gdev->big_endian = of_device_is_big_endian(dn);
+
+	err = devm_request_irq(&pdev->dev, timeout_irq,
+				brcmstb_gisb_timeout_handler, 0, pdev->name,
+				gdev);
+	if (err < 0)
+		return err;
+
+	err = devm_request_irq(&pdev->dev, tea_irq,
+				brcmstb_gisb_tea_handler, 0, pdev->name,
+				gdev);
+	if (err < 0)
+		return err;
+
+	/* If we do not have a valid mask, assume all masters are enabled */
+	if (of_property_read_u32(dn, "brcm,gisb-arb-master-mask",
+				&gdev->valid_mask))
+		gdev->valid_mask = 0xffffffff;
+
+	/* Proceed with reading the litteral names if we agree on the
+	 * number of masters
+	 */
+	num_masters = of_property_count_strings(dn,
+			"brcm,gisb-arb-master-names");
+	if (hweight_long(gdev->valid_mask) == num_masters) {
+		first = ffs(gdev->valid_mask) - 1;
+		last = fls(gdev->valid_mask) - 1;
+
+		for (i = first; i < last; i++) {
+			if (!(gdev->valid_mask & BIT(i)))
+				continue;
+
+			of_property_read_string_index(dn,
+					"brcm,gisb-arb-master-names", j,
+					&gdev->master_names[i]);
+			j++;
+		}
+	}
+
+	err = sysfs_create_group(&pdev->dev.kobj, &gisb_arb_sysfs_attr_group);
+	if (err)
+		return err;
+
+	platform_set_drvdata(pdev, gdev);
+
+	list_add_tail(&gdev->next, &brcmstb_gisb_arb_device_list);
+
+#ifdef CONFIG_MIPS
+	board_be_handler = brcmstb_bus_error_handler;
+#endif
+
+	if (list_is_singular(&brcmstb_gisb_arb_device_list)) {
+		register_die_notifier(&gisb_die_notifier);
+		atomic_notifier_chain_register(&panic_notifier_list,
+					       &gisb_panic_notifier);
+	}
+
+	dev_info(&pdev->dev, "registered mem: %p, irqs: %d, %d\n",
+			gdev->base, timeout_irq, tea_irq);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int brcmstb_gisb_arb_suspend(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
+
+	gdev->saved_timeout = gisb_read(gdev, ARB_TIMER);
+
+	return 0;
+}
+
+/* Make sure we provide the same timeout value that was configured before, and
+ * do this before the GISB timeout interrupt handler has any chance to run.
+ */
+static int brcmstb_gisb_arb_resume_noirq(struct device *dev)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+	struct brcmstb_gisb_arb_device *gdev = platform_get_drvdata(pdev);
+
+	gisb_write(gdev, gdev->saved_timeout, ARB_TIMER);
+
+	return 0;
+}
+#else
+#define brcmstb_gisb_arb_suspend       NULL
+#define brcmstb_gisb_arb_resume_noirq  NULL
+#endif
+
+static const struct dev_pm_ops brcmstb_gisb_arb_pm_ops = {
+	.suspend	= brcmstb_gisb_arb_suspend,
+	.resume_noirq	= brcmstb_gisb_arb_resume_noirq,
+};
+
+static struct platform_driver brcmstb_gisb_arb_driver = {
+	.driver = {
+		.name	= "brcm-gisb-arb",
+		.of_match_table = brcmstb_gisb_arb_of_match,
+		.pm	= &brcmstb_gisb_arb_pm_ops,
+	},
+};
+
+static int __init brcm_gisb_driver_init(void)
+{
+	return platform_driver_probe(&brcmstb_gisb_arb_driver,
+				     brcmstb_gisb_arb_probe);
+}
+
+module_init(brcm_gisb_driver_init);
diff --git a/drivers/bus/da8xx-mstpri.c b/drivers/bus/da8xx-mstpri.c
new file mode 100644
index 000000000..9af9bcc68
--- /dev/null
+++ b/drivers/bus/da8xx-mstpri.c
@@ -0,0 +1,267 @@
+/*
+ * TI da8xx master peripheral priority driver
+ *
+ * Copyright (C) 2016 BayLibre SAS
+ *
+ * Author:
+ *   Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/regmap.h>
+
+/*
+ * REVISIT: Linux doesn't have a good framework for the kind of performance
+ * knobs this driver controls. We can't use device tree properties as it deals
+ * with hardware configuration rather than description. We also don't want to
+ * commit to maintaining some random sysfs attributes.
+ *
+ * For now we just hardcode the register values for the boards that need
+ * some changes (as is the case for the LCD controller on da850-lcdk - the
+ * first board we support here). When linux gets an appropriate framework,
+ * we'll easily convert the driver to it.
+ */
+
+#define DA8XX_MSTPRI0_OFFSET		0
+#define DA8XX_MSTPRI1_OFFSET		4
+#define DA8XX_MSTPRI2_OFFSET		8
+
+enum {
+	DA8XX_MSTPRI_ARM_I = 0,
+	DA8XX_MSTPRI_ARM_D,
+	DA8XX_MSTPRI_UPP,
+	DA8XX_MSTPRI_SATA,
+	DA8XX_MSTPRI_PRU0,
+	DA8XX_MSTPRI_PRU1,
+	DA8XX_MSTPRI_EDMA30TC0,
+	DA8XX_MSTPRI_EDMA30TC1,
+	DA8XX_MSTPRI_EDMA31TC0,
+	DA8XX_MSTPRI_VPIF_DMA_0,
+	DA8XX_MSTPRI_VPIF_DMA_1,
+	DA8XX_MSTPRI_EMAC,
+	DA8XX_MSTPRI_USB0CFG,
+	DA8XX_MSTPRI_USB0CDMA,
+	DA8XX_MSTPRI_UHPI,
+	DA8XX_MSTPRI_USB1,
+	DA8XX_MSTPRI_LCDC,
+};
+
+struct da8xx_mstpri_descr {
+	int reg;
+	int shift;
+	int mask;
+};
+
+static const struct da8xx_mstpri_descr da8xx_mstpri_priority_list[] = {
+	[DA8XX_MSTPRI_ARM_I] = {
+		.reg = DA8XX_MSTPRI0_OFFSET,
+		.shift = 0,
+		.mask = 0x0000000f,
+	},
+	[DA8XX_MSTPRI_ARM_D] = {
+		.reg = DA8XX_MSTPRI0_OFFSET,
+		.shift = 4,
+		.mask = 0x000000f0,
+	},
+	[DA8XX_MSTPRI_UPP] = {
+		.reg = DA8XX_MSTPRI0_OFFSET,
+		.shift = 16,
+		.mask = 0x000f0000,
+	},
+	[DA8XX_MSTPRI_SATA] = {
+		.reg = DA8XX_MSTPRI0_OFFSET,
+		.shift = 20,
+		.mask = 0x00f00000,
+	},
+	[DA8XX_MSTPRI_PRU0] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 0,
+		.mask = 0x0000000f,
+	},
+	[DA8XX_MSTPRI_PRU1] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 4,
+		.mask = 0x000000f0,
+	},
+	[DA8XX_MSTPRI_EDMA30TC0] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 8,
+		.mask = 0x00000f00,
+	},
+	[DA8XX_MSTPRI_EDMA30TC1] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 12,
+		.mask = 0x0000f000,
+	},
+	[DA8XX_MSTPRI_EDMA31TC0] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 16,
+		.mask = 0x000f0000,
+	},
+	[DA8XX_MSTPRI_VPIF_DMA_0] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 24,
+		.mask = 0x0f000000,
+	},
+	[DA8XX_MSTPRI_VPIF_DMA_1] = {
+		.reg = DA8XX_MSTPRI1_OFFSET,
+		.shift = 28,
+		.mask = 0xf0000000,
+	},
+	[DA8XX_MSTPRI_EMAC] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 0,
+		.mask = 0x0000000f,
+	},
+	[DA8XX_MSTPRI_USB0CFG] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 8,
+		.mask = 0x00000f00,
+	},
+	[DA8XX_MSTPRI_USB0CDMA] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 12,
+		.mask = 0x0000f000,
+	},
+	[DA8XX_MSTPRI_UHPI] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 20,
+		.mask = 0x00f00000,
+	},
+	[DA8XX_MSTPRI_USB1] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 24,
+		.mask = 0x0f000000,
+	},
+	[DA8XX_MSTPRI_LCDC] = {
+		.reg = DA8XX_MSTPRI2_OFFSET,
+		.shift = 28,
+		.mask = 0xf0000000,
+	},
+};
+
+struct da8xx_mstpri_priority {
+	int which;
+	u32 val;
+};
+
+struct da8xx_mstpri_board_priorities {
+	const char *board;
+	const struct da8xx_mstpri_priority *priorities;
+	size_t numprio;
+};
+
+/*
+ * Default memory settings of da850 do not meet the throughput/latency
+ * requirements of tilcdc. This results in the image displayed being
+ * incorrect and the following warning being displayed by the LCDC
+ * drm driver:
+ *
+ *   tilcdc da8xx_lcdc.0: tilcdc_crtc_irq(0x00000020): FIFO underfow
+ */
+static const struct da8xx_mstpri_priority da850_lcdk_priorities[] = {
+	{
+		.which = DA8XX_MSTPRI_LCDC,
+		.val = 0,
+	},
+	{
+		.which = DA8XX_MSTPRI_EDMA30TC1,
+		.val = 0,
+	},
+	{
+		.which = DA8XX_MSTPRI_EDMA30TC0,
+		.val = 1,
+	},
+};
+
+static const struct da8xx_mstpri_board_priorities da8xx_mstpri_board_confs[] = {
+	{
+		.board = "ti,da850-lcdk",
+		.priorities = da850_lcdk_priorities,
+		.numprio = ARRAY_SIZE(da850_lcdk_priorities),
+	},
+};
+
+static const struct da8xx_mstpri_board_priorities *
+da8xx_mstpri_get_board_prio(void)
+{
+	const struct da8xx_mstpri_board_priorities *board_prio;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(da8xx_mstpri_board_confs); i++) {
+		board_prio = &da8xx_mstpri_board_confs[i];
+
+		if (of_machine_is_compatible(board_prio->board))
+			return board_prio;
+	}
+
+	return NULL;
+}
+
+static int da8xx_mstpri_probe(struct platform_device *pdev)
+{
+	const struct da8xx_mstpri_board_priorities *prio_list;
+	const struct da8xx_mstpri_descr *prio_descr;
+	const struct da8xx_mstpri_priority *prio;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	void __iomem *mstpri;
+	u32 reg;
+	int i;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	mstpri = devm_ioremap_resource(dev, res);
+	if (IS_ERR(mstpri)) {
+		dev_err(dev, "unable to map MSTPRI registers\n");
+		return PTR_ERR(mstpri);
+	}
+
+	prio_list = da8xx_mstpri_get_board_prio();
+	if (!prio_list) {
+		dev_err(dev, "no master priorities defined for this board\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < prio_list->numprio; i++) {
+		prio = &prio_list->priorities[i];
+		prio_descr = &da8xx_mstpri_priority_list[prio->which];
+
+		if (prio_descr->reg + sizeof(u32) > resource_size(res)) {
+			dev_warn(dev, "register offset out of range\n");
+			continue;
+		}
+
+		reg = readl(mstpri + prio_descr->reg);
+		reg &= ~prio_descr->mask;
+		reg |= prio->val << prio_descr->shift;
+
+		writel(reg, mstpri + prio_descr->reg);
+	}
+
+	return 0;
+}
+
+static const struct of_device_id da8xx_mstpri_of_match[] = {
+	{ .compatible = "ti,da850-mstpri", },
+	{ },
+};
+
+static struct platform_driver da8xx_mstpri_driver = {
+	.probe = da8xx_mstpri_probe,
+	.driver = {
+		.name = "da8xx-mstpri",
+		.of_match_table = da8xx_mstpri_of_match,
+	},
+};
+module_platform_driver(da8xx_mstpri_driver);
+
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_DESCRIPTION("TI da8xx master peripheral priority driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/fsl-mc/Kconfig b/drivers/bus/fsl-mc/Kconfig
new file mode 100644
index 000000000..c23c77c9b
--- /dev/null
+++ b/drivers/bus/fsl-mc/Kconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# DPAA2 fsl-mc bus
+#
+# Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
+#
+
+config FSL_MC_BUS
+	bool "QorIQ DPAA2 fsl-mc bus driver"
+	depends on OF && (ARCH_LAYERSCAPE || (COMPILE_TEST && (ARM || ARM64 || X86_LOCAL_APIC || PPC)))
+	select GENERIC_MSI_IRQ_DOMAIN
+	help
+	  Driver to enable the bus infrastructure for the QorIQ DPAA2
+	  architecture.  The fsl-mc bus driver handles discovery of
+	  DPAA2 objects (which are represented as Linux devices) and
+	  binding objects to drivers.
diff --git a/drivers/bus/fsl-mc/Makefile b/drivers/bus/fsl-mc/Makefile
new file mode 100644
index 000000000..3c518c7e8
--- /dev/null
+++ b/drivers/bus/fsl-mc/Makefile
@@ -0,0 +1,18 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Freescale Management Complex (MC) bus drivers
+#
+# Copyright (C) 2014 Freescale Semiconductor, Inc.
+#
+obj-$(CONFIG_FSL_MC_BUS) += mc-bus-driver.o
+
+mc-bus-driver-objs := fsl-mc-bus.o \
+		      mc-sys.o \
+		      mc-io.o \
+		      dpbp.o \
+		      dpcon.o \
+		      dprc.o \
+		      dprc-driver.o \
+		      fsl-mc-allocator.o \
+		      fsl-mc-msi.o \
+		      dpmcp.o
diff --git a/drivers/bus/fsl-mc/dpbp.c b/drivers/bus/fsl-mc/dpbp.c
new file mode 100644
index 000000000..17e3c5d2f
--- /dev/null
+++ b/drivers/bus/fsl-mc/dpbp.c
@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * dpbp_open() - Open a control session for the specified object.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @dpbp_id:	DPBP unique ID
+ * @token:	Returned token; use in subsequent API calls
+ *
+ * This function can be used to open a control session for an
+ * already created object; an object may have been declared in
+ * the DPL or by calling the dpbp_create function.
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent commands for
+ * this specific object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_open(struct fsl_mc_io *mc_io,
+	      u32 cmd_flags,
+	      int dpbp_id,
+	      u16 *token)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpbp_cmd_open *cmd_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_OPEN,
+					  cmd_flags, 0);
+	cmd_params = (struct dpbp_cmd_open *)cmd.params;
+	cmd_params->dpbp_id = cpu_to_le32(dpbp_id);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*token = mc_cmd_hdr_read_token(&cmd);
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(dpbp_open);
+
+/**
+ * dpbp_close() - Close the control session of the object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPBP object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_close(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_CLOSE, cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpbp_close);
+
+/**
+ * dpbp_enable() - Enable the DPBP.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPBP object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_enable(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_ENABLE, cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpbp_enable);
+
+/**
+ * dpbp_disable() - Disable the DPBP.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPBP object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_disable(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_DISABLE,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpbp_disable);
+
+/**
+ * dpbp_reset() - Reset the DPBP, returns the object to initial state.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPBP object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_reset(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_RESET,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpbp_reset);
+
+/**
+ * dpbp_get_attributes - Retrieve DPBP attributes.
+ *
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPBP object
+ * @attr:	Returned object's attributes
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpbp_get_attributes(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			struct dpbp_attr *attr)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpbp_rsp_get_attributes *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPBP_CMDID_GET_ATTR,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dpbp_rsp_get_attributes *)cmd.params;
+	attr->bpid = le16_to_cpu(rsp_params->bpid);
+	attr->id = le32_to_cpu(rsp_params->id);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dpbp_get_attributes);
diff --git a/drivers/bus/fsl-mc/dpcon.c b/drivers/bus/fsl-mc/dpcon.c
new file mode 100644
index 000000000..760555d79
--- /dev/null
+++ b/drivers/bus/fsl-mc/dpcon.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * dpcon_open() - Open a control session for the specified object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @dpcon_id:	DPCON unique ID
+ * @token:	Returned token; use in subsequent API calls
+ *
+ * This function can be used to open a control session for an
+ * already created object; an object may have been declared in
+ * the DPL or by calling the dpcon_create() function.
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent commands for
+ * this specific object.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpcon_id,
+	       u16 *token)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpcon_cmd_open *dpcon_cmd;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_OPEN,
+					  cmd_flags,
+					  0);
+	dpcon_cmd = (struct dpcon_cmd_open *)cmd.params;
+	dpcon_cmd->dpcon_id = cpu_to_le32(dpcon_id);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*token = mc_cmd_hdr_read_token(&cmd);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dpcon_open);
+
+/**
+ * dpcon_close() - Close the control session of the object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_CLOSE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpcon_close);
+
+/**
+ * dpcon_enable() - Enable the DPCON
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_enable(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_ENABLE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpcon_enable);
+
+/**
+ * dpcon_disable() - Disable the DPCON
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_disable(struct fsl_mc_io *mc_io,
+		  u32 cmd_flags,
+		  u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_DISABLE,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpcon_disable);
+
+/**
+ * dpcon_reset() - Reset the DPCON, returns the object to initial state.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_reset(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_RESET,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpcon_reset);
+
+/**
+ * dpcon_get_attributes() - Retrieve DPCON attributes.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @attr:	Object's attributes
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpcon_get_attributes(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 token,
+			 struct dpcon_attr *attr)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpcon_rsp_get_attr *dpcon_rsp;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_GET_ATTR,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	dpcon_rsp = (struct dpcon_rsp_get_attr *)cmd.params;
+	attr->id = le32_to_cpu(dpcon_rsp->id);
+	attr->qbman_ch_id = le16_to_cpu(dpcon_rsp->qbman_ch_id);
+	attr->num_priorities = dpcon_rsp->num_priorities;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dpcon_get_attributes);
+
+/**
+ * dpcon_set_notification() - Set DPCON notification destination
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPCON object
+ * @cfg:	Notification parameters
+ *
+ * Return:	'0' on Success; Error code otherwise
+ */
+int dpcon_set_notification(struct fsl_mc_io *mc_io,
+			   u32 cmd_flags,
+			   u16 token,
+			   struct dpcon_notification_cfg *cfg)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpcon_cmd_set_notification *dpcon_cmd;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPCON_CMDID_SET_NOTIFICATION,
+					  cmd_flags,
+					  token);
+	dpcon_cmd = (struct dpcon_cmd_set_notification *)cmd.params;
+	dpcon_cmd->dpio_id = cpu_to_le32(cfg->dpio_id);
+	dpcon_cmd->priority = cfg->priority;
+	dpcon_cmd->user_ctx = cpu_to_le64(cfg->user_ctx);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dpcon_set_notification);
diff --git a/drivers/bus/fsl-mc/dpmcp.c b/drivers/bus/fsl-mc/dpmcp.c
new file mode 100644
index 000000000..5fbd0dbde
--- /dev/null
+++ b/drivers/bus/fsl-mc/dpmcp.c
@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * dpmcp_open() - Open a control session for the specified object.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @dpmcp_id:	DPMCP unique ID
+ * @token:	Returned token; use in subsequent API calls
+ *
+ * This function can be used to open a control session for an
+ * already created object; an object may have been declared in
+ * the DPL or by calling the dpmcp_create function.
+ * This function returns a unique authentication token,
+ * associated with the specific object ID and the specific MC
+ * portal; this token must be used in all subsequent commands for
+ * this specific object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpmcp_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpmcp_id,
+	       u16 *token)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpmcp_cmd_open *cmd_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPMCP_CMDID_OPEN,
+					  cmd_flags, 0);
+	cmd_params = (struct dpmcp_cmd_open *)cmd.params;
+	cmd_params->dpmcp_id = cpu_to_le32(dpmcp_id);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*token = mc_cmd_hdr_read_token(&cmd);
+
+	return err;
+}
+
+/**
+ * dpmcp_close() - Close the control session of the object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPMCP object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpmcp_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPMCP_CMDID_CLOSE,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dpmcp_reset() - Reset the DPMCP, returns the object to initial state.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPMCP object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dpmcp_reset(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPMCP_CMDID_RESET,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
diff --git a/drivers/bus/fsl-mc/dprc-driver.c b/drivers/bus/fsl-mc/dprc-driver.c
new file mode 100644
index 000000000..52c7e1514
--- /dev/null
+++ b/drivers/bus/fsl-mc/dprc-driver.c
@@ -0,0 +1,809 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Freescale data path resource container (DPRC) driver
+ *
+ * Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
+ * Author: German Rivera <German.Rivera@freescale.com>
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/msi.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+#define FSL_MC_DPRC_DRIVER_NAME    "fsl_mc_dprc"
+
+struct fsl_mc_child_objs {
+	int child_count;
+	struct fsl_mc_obj_desc *child_array;
+};
+
+static bool fsl_mc_device_match(struct fsl_mc_device *mc_dev,
+				struct fsl_mc_obj_desc *obj_desc)
+{
+	return mc_dev->obj_desc.id == obj_desc->id &&
+	       strcmp(mc_dev->obj_desc.type, obj_desc->type) == 0;
+
+}
+
+static int __fsl_mc_device_remove_if_not_in_mc(struct device *dev, void *data)
+{
+	int i;
+	struct fsl_mc_child_objs *objs;
+	struct fsl_mc_device *mc_dev;
+
+	mc_dev = to_fsl_mc_device(dev);
+	objs = data;
+
+	for (i = 0; i < objs->child_count; i++) {
+		struct fsl_mc_obj_desc *obj_desc = &objs->child_array[i];
+
+		if (strlen(obj_desc->type) != 0 &&
+		    fsl_mc_device_match(mc_dev, obj_desc))
+			break;
+	}
+
+	if (i == objs->child_count)
+		fsl_mc_device_remove(mc_dev);
+
+	return 0;
+}
+
+static int __fsl_mc_device_remove(struct device *dev, void *data)
+{
+	fsl_mc_device_remove(to_fsl_mc_device(dev));
+	return 0;
+}
+
+/**
+ * dprc_remove_devices - Removes devices for objects removed from a DPRC
+ *
+ * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object
+ * @obj_desc_array: array of object descriptors for child objects currently
+ * present in the DPRC in the MC.
+ * @num_child_objects_in_mc: number of entries in obj_desc_array
+ *
+ * Synchronizes the state of the Linux bus driver with the actual state of
+ * the MC by removing devices that represent MC objects that have
+ * been dynamically removed in the physical DPRC.
+ */
+static void dprc_remove_devices(struct fsl_mc_device *mc_bus_dev,
+				struct fsl_mc_obj_desc *obj_desc_array,
+				int num_child_objects_in_mc)
+{
+	if (num_child_objects_in_mc != 0) {
+		/*
+		 * Remove child objects that are in the DPRC in Linux,
+		 * but not in the MC:
+		 */
+		struct fsl_mc_child_objs objs;
+
+		objs.child_count = num_child_objects_in_mc;
+		objs.child_array = obj_desc_array;
+		device_for_each_child(&mc_bus_dev->dev, &objs,
+				      __fsl_mc_device_remove_if_not_in_mc);
+	} else {
+		/*
+		 * There are no child objects for this DPRC in the MC.
+		 * So, remove all the child devices from Linux:
+		 */
+		device_for_each_child(&mc_bus_dev->dev, NULL,
+				      __fsl_mc_device_remove);
+	}
+}
+
+static int __fsl_mc_device_match(struct device *dev, void *data)
+{
+	struct fsl_mc_obj_desc *obj_desc = data;
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+	return fsl_mc_device_match(mc_dev, obj_desc);
+}
+
+static struct fsl_mc_device *fsl_mc_device_lookup(struct fsl_mc_obj_desc
+								*obj_desc,
+						  struct fsl_mc_device
+								*mc_bus_dev)
+{
+	struct device *dev;
+
+	dev = device_find_child(&mc_bus_dev->dev, obj_desc,
+				__fsl_mc_device_match);
+
+	return dev ? to_fsl_mc_device(dev) : NULL;
+}
+
+/**
+ * check_plugged_state_change - Check change in an MC object's plugged state
+ *
+ * @mc_dev: pointer to the fsl-mc device for a given MC object
+ * @obj_desc: pointer to the MC object's descriptor in the MC
+ *
+ * If the plugged state has changed from unplugged to plugged, the fsl-mc
+ * device is bound to the corresponding device driver.
+ * If the plugged state has changed from plugged to unplugged, the fsl-mc
+ * device is unbound from the corresponding device driver.
+ */
+static void check_plugged_state_change(struct fsl_mc_device *mc_dev,
+				       struct fsl_mc_obj_desc *obj_desc)
+{
+	int error;
+	u32 plugged_flag_at_mc =
+			obj_desc->state & FSL_MC_OBJ_STATE_PLUGGED;
+
+	if (plugged_flag_at_mc !=
+	    (mc_dev->obj_desc.state & FSL_MC_OBJ_STATE_PLUGGED)) {
+		if (plugged_flag_at_mc) {
+			mc_dev->obj_desc.state |= FSL_MC_OBJ_STATE_PLUGGED;
+			error = device_attach(&mc_dev->dev);
+			if (error < 0) {
+				dev_err(&mc_dev->dev,
+					"device_attach() failed: %d\n",
+					error);
+			}
+		} else {
+			mc_dev->obj_desc.state &= ~FSL_MC_OBJ_STATE_PLUGGED;
+			device_release_driver(&mc_dev->dev);
+		}
+	}
+}
+
+/**
+ * dprc_add_new_devices - Adds devices to the logical bus for a DPRC
+ *
+ * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object
+ * @obj_desc_array: array of device descriptors for child devices currently
+ * present in the physical DPRC.
+ * @num_child_objects_in_mc: number of entries in obj_desc_array
+ *
+ * Synchronizes the state of the Linux bus driver with the actual
+ * state of the MC by adding objects that have been newly discovered
+ * in the physical DPRC.
+ */
+static void dprc_add_new_devices(struct fsl_mc_device *mc_bus_dev,
+				 struct fsl_mc_obj_desc *obj_desc_array,
+				 int num_child_objects_in_mc)
+{
+	int error;
+	int i;
+
+	for (i = 0; i < num_child_objects_in_mc; i++) {
+		struct fsl_mc_device *child_dev;
+		struct fsl_mc_obj_desc *obj_desc = &obj_desc_array[i];
+
+		if (strlen(obj_desc->type) == 0)
+			continue;
+
+		/*
+		 * Check if device is already known to Linux:
+		 */
+		child_dev = fsl_mc_device_lookup(obj_desc, mc_bus_dev);
+		if (child_dev) {
+			check_plugged_state_change(child_dev, obj_desc);
+			put_device(&child_dev->dev);
+			continue;
+		}
+
+		error = fsl_mc_device_add(obj_desc, NULL, &mc_bus_dev->dev,
+					  &child_dev);
+		if (error < 0)
+			continue;
+	}
+}
+
+/**
+ * dprc_scan_objects - Discover objects in a DPRC
+ *
+ * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object
+ * @total_irq_count: If argument is provided the function populates the
+ * total number of IRQs created by objects in the DPRC.
+ *
+ * Detects objects added and removed from a DPRC and synchronizes the
+ * state of the Linux bus driver, MC by adding and removing
+ * devices accordingly.
+ * Two types of devices can be found in a DPRC: allocatable objects (e.g.,
+ * dpbp, dpmcp) and non-allocatable devices (e.g., dprc, dpni).
+ * All allocatable devices needed to be probed before all non-allocatable
+ * devices, to ensure that device drivers for non-allocatable
+ * devices can allocate any type of allocatable devices.
+ * That is, we need to ensure that the corresponding resource pools are
+ * populated before they can get allocation requests from probe callbacks
+ * of the device drivers for the non-allocatable devices.
+ */
+static int dprc_scan_objects(struct fsl_mc_device *mc_bus_dev,
+			     unsigned int *total_irq_count)
+{
+	int num_child_objects;
+	int dprc_get_obj_failures;
+	int error;
+	unsigned int irq_count = mc_bus_dev->obj_desc.irq_count;
+	struct fsl_mc_obj_desc *child_obj_desc_array = NULL;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
+
+	error = dprc_get_obj_count(mc_bus_dev->mc_io,
+				   0,
+				   mc_bus_dev->mc_handle,
+				   &num_child_objects);
+	if (error < 0) {
+		dev_err(&mc_bus_dev->dev, "dprc_get_obj_count() failed: %d\n",
+			error);
+		return error;
+	}
+
+	if (num_child_objects != 0) {
+		int i;
+
+		child_obj_desc_array =
+		    devm_kmalloc_array(&mc_bus_dev->dev, num_child_objects,
+				       sizeof(*child_obj_desc_array),
+				       GFP_KERNEL);
+		if (!child_obj_desc_array)
+			return -ENOMEM;
+
+		/*
+		 * Discover objects currently present in the physical DPRC:
+		 */
+		dprc_get_obj_failures = 0;
+		for (i = 0; i < num_child_objects; i++) {
+			struct fsl_mc_obj_desc *obj_desc =
+			    &child_obj_desc_array[i];
+
+			error = dprc_get_obj(mc_bus_dev->mc_io,
+					     0,
+					     mc_bus_dev->mc_handle,
+					     i, obj_desc);
+			if (error < 0) {
+				dev_err(&mc_bus_dev->dev,
+					"dprc_get_obj(i=%d) failed: %d\n",
+					i, error);
+				/*
+				 * Mark the obj entry as "invalid", by using the
+				 * empty string as obj type:
+				 */
+				obj_desc->type[0] = '\0';
+				obj_desc->id = error;
+				dprc_get_obj_failures++;
+				continue;
+			}
+
+			/*
+			 * add a quirk for all versions of dpsec < 4.0...none
+			 * are coherent regardless of what the MC reports.
+			 */
+			if ((strcmp(obj_desc->type, "dpseci") == 0) &&
+			    (obj_desc->ver_major < 4))
+				obj_desc->flags |=
+					FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY;
+
+			irq_count += obj_desc->irq_count;
+			dev_dbg(&mc_bus_dev->dev,
+				"Discovered object: type %s, id %d\n",
+				obj_desc->type, obj_desc->id);
+		}
+
+		if (dprc_get_obj_failures != 0) {
+			dev_err(&mc_bus_dev->dev,
+				"%d out of %d devices could not be retrieved\n",
+				dprc_get_obj_failures, num_child_objects);
+		}
+	}
+
+	/*
+	 * Allocate IRQ's before binding the scanned devices with their
+	 * respective drivers.
+	 */
+	if (dev_get_msi_domain(&mc_bus_dev->dev) && !mc_bus->irq_resources) {
+		if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
+			dev_warn(&mc_bus_dev->dev,
+				 "IRQs needed (%u) exceed IRQs preallocated (%u)\n",
+				 irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
+		}
+
+		error = fsl_mc_populate_irq_pool(mc_bus,
+				FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
+		if (error < 0)
+			return error;
+	}
+
+	if (total_irq_count)
+		*total_irq_count = irq_count;
+
+	dprc_remove_devices(mc_bus_dev, child_obj_desc_array,
+			    num_child_objects);
+
+	dprc_add_new_devices(mc_bus_dev, child_obj_desc_array,
+			     num_child_objects);
+
+	if (child_obj_desc_array)
+		devm_kfree(&mc_bus_dev->dev, child_obj_desc_array);
+
+	return 0;
+}
+
+/**
+ * dprc_scan_container - Scans a physical DPRC and synchronizes Linux bus state
+ *
+ * @mc_bus_dev: pointer to the fsl-mc device that represents a DPRC object
+ *
+ * Scans the physical DPRC and synchronizes the state of the Linux
+ * bus driver with the actual state of the MC by adding and removing
+ * devices as appropriate.
+ */
+static int dprc_scan_container(struct fsl_mc_device *mc_bus_dev)
+{
+	int error;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
+
+	fsl_mc_init_all_resource_pools(mc_bus_dev);
+
+	/*
+	 * Discover objects in the DPRC:
+	 */
+	mutex_lock(&mc_bus->scan_mutex);
+	error = dprc_scan_objects(mc_bus_dev, NULL);
+	mutex_unlock(&mc_bus->scan_mutex);
+	if (error < 0) {
+		fsl_mc_cleanup_all_resource_pools(mc_bus_dev);
+		return error;
+	}
+
+	return 0;
+}
+
+/**
+ * dprc_irq0_handler - Regular ISR for DPRC interrupt 0
+ *
+ * @irq: IRQ number of the interrupt being handled
+ * @arg: Pointer to device structure
+ */
+static irqreturn_t dprc_irq0_handler(int irq_num, void *arg)
+{
+	return IRQ_WAKE_THREAD;
+}
+
+/**
+ * dprc_irq0_handler_thread - Handler thread function for DPRC interrupt 0
+ *
+ * @irq: IRQ number of the interrupt being handled
+ * @arg: Pointer to device structure
+ */
+static irqreturn_t dprc_irq0_handler_thread(int irq_num, void *arg)
+{
+	int error;
+	u32 status;
+	struct device *dev = arg;
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+	struct fsl_mc_io *mc_io = mc_dev->mc_io;
+	struct msi_desc *msi_desc = mc_dev->irqs[0]->msi_desc;
+
+	dev_dbg(dev, "DPRC IRQ %d triggered on CPU %u\n",
+		irq_num, smp_processor_id());
+
+	if (!(mc_dev->flags & FSL_MC_IS_DPRC))
+		return IRQ_HANDLED;
+
+	mutex_lock(&mc_bus->scan_mutex);
+	if (!msi_desc || msi_desc->irq != (u32)irq_num)
+		goto out;
+
+	status = 0;
+	error = dprc_get_irq_status(mc_io, 0, mc_dev->mc_handle, 0,
+				    &status);
+	if (error < 0) {
+		dev_err(dev,
+			"dprc_get_irq_status() failed: %d\n", error);
+		goto out;
+	}
+
+	error = dprc_clear_irq_status(mc_io, 0, mc_dev->mc_handle, 0,
+				      status);
+	if (error < 0) {
+		dev_err(dev,
+			"dprc_clear_irq_status() failed: %d\n", error);
+		goto out;
+	}
+
+	if (status & (DPRC_IRQ_EVENT_OBJ_ADDED |
+		      DPRC_IRQ_EVENT_OBJ_REMOVED |
+		      DPRC_IRQ_EVENT_CONTAINER_DESTROYED |
+		      DPRC_IRQ_EVENT_OBJ_DESTROYED |
+		      DPRC_IRQ_EVENT_OBJ_CREATED)) {
+		unsigned int irq_count;
+
+		error = dprc_scan_objects(mc_dev, &irq_count);
+		if (error < 0) {
+			/*
+			 * If the error is -ENXIO, we ignore it, as it indicates
+			 * that the object scan was aborted, as we detected that
+			 * an object was removed from the DPRC in the MC, while
+			 * we were scanning the DPRC.
+			 */
+			if (error != -ENXIO) {
+				dev_err(dev, "dprc_scan_objects() failed: %d\n",
+					error);
+			}
+
+			goto out;
+		}
+
+		if (irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS) {
+			dev_warn(dev,
+				 "IRQs needed (%u) exceed IRQs preallocated (%u)\n",
+				 irq_count, FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS);
+		}
+	}
+
+out:
+	mutex_unlock(&mc_bus->scan_mutex);
+	return IRQ_HANDLED;
+}
+
+/*
+ * Disable and clear interrupt for a given DPRC object
+ */
+static int disable_dprc_irq(struct fsl_mc_device *mc_dev)
+{
+	int error;
+	struct fsl_mc_io *mc_io = mc_dev->mc_io;
+
+	/*
+	 * Disable generation of interrupt, while we configure it:
+	 */
+	error = dprc_set_irq_enable(mc_io, 0, mc_dev->mc_handle, 0, 0);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"Disabling DPRC IRQ failed: dprc_set_irq_enable() failed: %d\n",
+			error);
+		return error;
+	}
+
+	/*
+	 * Disable all interrupt causes for the interrupt:
+	 */
+	error = dprc_set_irq_mask(mc_io, 0, mc_dev->mc_handle, 0, 0x0);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"Disabling DPRC IRQ failed: dprc_set_irq_mask() failed: %d\n",
+			error);
+		return error;
+	}
+
+	/*
+	 * Clear any leftover interrupts:
+	 */
+	error = dprc_clear_irq_status(mc_io, 0, mc_dev->mc_handle, 0, ~0x0U);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"Disabling DPRC IRQ failed: dprc_clear_irq_status() failed: %d\n",
+			error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int register_dprc_irq_handler(struct fsl_mc_device *mc_dev)
+{
+	int error;
+	struct fsl_mc_device_irq *irq = mc_dev->irqs[0];
+
+	/*
+	 * NOTE: devm_request_threaded_irq() invokes the device-specific
+	 * function that programs the MSI physically in the device
+	 */
+	error = devm_request_threaded_irq(&mc_dev->dev,
+					  irq->msi_desc->irq,
+					  dprc_irq0_handler,
+					  dprc_irq0_handler_thread,
+					  IRQF_NO_SUSPEND | IRQF_ONESHOT,
+					  dev_name(&mc_dev->dev),
+					  &mc_dev->dev);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"devm_request_threaded_irq() failed: %d\n",
+			error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int enable_dprc_irq(struct fsl_mc_device *mc_dev)
+{
+	int error;
+
+	/*
+	 * Enable all interrupt causes for the interrupt:
+	 */
+	error = dprc_set_irq_mask(mc_dev->mc_io, 0, mc_dev->mc_handle, 0,
+				  ~0x0u);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"Enabling DPRC IRQ failed: dprc_set_irq_mask() failed: %d\n",
+			error);
+
+		return error;
+	}
+
+	/*
+	 * Enable generation of the interrupt:
+	 */
+	error = dprc_set_irq_enable(mc_dev->mc_io, 0, mc_dev->mc_handle, 0, 1);
+	if (error < 0) {
+		dev_err(&mc_dev->dev,
+			"Enabling DPRC IRQ failed: dprc_set_irq_enable() failed: %d\n",
+			error);
+
+		return error;
+	}
+
+	return 0;
+}
+
+/*
+ * Setup interrupt for a given DPRC device
+ */
+static int dprc_setup_irq(struct fsl_mc_device *mc_dev)
+{
+	int error;
+
+	error = fsl_mc_allocate_irqs(mc_dev);
+	if (error < 0)
+		return error;
+
+	error = disable_dprc_irq(mc_dev);
+	if (error < 0)
+		goto error_free_irqs;
+
+	error = register_dprc_irq_handler(mc_dev);
+	if (error < 0)
+		goto error_free_irqs;
+
+	error = enable_dprc_irq(mc_dev);
+	if (error < 0)
+		goto error_free_irqs;
+
+	return 0;
+
+error_free_irqs:
+	fsl_mc_free_irqs(mc_dev);
+	return error;
+}
+
+/**
+ * dprc_probe - callback invoked when a DPRC is being bound to this driver
+ *
+ * @mc_dev: Pointer to fsl-mc device representing a DPRC
+ *
+ * It opens the physical DPRC in the MC.
+ * It scans the DPRC to discover the MC objects contained in it.
+ * It creates the interrupt pool for the MC bus associated with the DPRC.
+ * It configures the interrupts for the DPRC device itself.
+ */
+static int dprc_probe(struct fsl_mc_device *mc_dev)
+{
+	int error;
+	size_t region_size;
+	struct device *parent_dev = mc_dev->dev.parent;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+	bool mc_io_created = false;
+	bool msi_domain_set = false;
+	u16 major_ver, minor_ver;
+
+	if (!is_fsl_mc_bus_dprc(mc_dev))
+		return -EINVAL;
+
+	if (dev_get_msi_domain(&mc_dev->dev))
+		return -EINVAL;
+
+	if (!mc_dev->mc_io) {
+		/*
+		 * This is a child DPRC:
+		 */
+		if (!dev_is_fsl_mc(parent_dev))
+			return -EINVAL;
+
+		if (mc_dev->obj_desc.region_count == 0)
+			return -EINVAL;
+
+		region_size = resource_size(mc_dev->regions);
+
+		error = fsl_create_mc_io(&mc_dev->dev,
+					 mc_dev->regions[0].start,
+					 region_size,
+					 NULL,
+					 FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
+					 &mc_dev->mc_io);
+		if (error < 0)
+			return error;
+
+		mc_io_created = true;
+
+		/*
+		 * Inherit parent MSI domain:
+		 */
+		dev_set_msi_domain(&mc_dev->dev,
+				   dev_get_msi_domain(parent_dev));
+		msi_domain_set = true;
+	} else {
+		/*
+		 * This is a root DPRC
+		 */
+		struct irq_domain *mc_msi_domain;
+
+		if (dev_is_fsl_mc(parent_dev))
+			return -EINVAL;
+
+		error = fsl_mc_find_msi_domain(parent_dev,
+					       &mc_msi_domain);
+		if (error < 0) {
+			dev_warn(&mc_dev->dev,
+				 "WARNING: MC bus without interrupt support\n");
+		} else {
+			dev_set_msi_domain(&mc_dev->dev, mc_msi_domain);
+			msi_domain_set = true;
+		}
+	}
+
+	error = dprc_open(mc_dev->mc_io, 0, mc_dev->obj_desc.id,
+			  &mc_dev->mc_handle);
+	if (error < 0) {
+		dev_err(&mc_dev->dev, "dprc_open() failed: %d\n", error);
+		goto error_cleanup_msi_domain;
+	}
+
+	error = dprc_get_attributes(mc_dev->mc_io, 0, mc_dev->mc_handle,
+				    &mc_bus->dprc_attr);
+	if (error < 0) {
+		dev_err(&mc_dev->dev, "dprc_get_attributes() failed: %d\n",
+			error);
+		goto error_cleanup_open;
+	}
+
+	error = dprc_get_api_version(mc_dev->mc_io, 0,
+				     &major_ver,
+				     &minor_ver);
+	if (error < 0) {
+		dev_err(&mc_dev->dev, "dprc_get_api_version() failed: %d\n",
+			error);
+		goto error_cleanup_open;
+	}
+
+	if (major_ver < DPRC_MIN_VER_MAJOR ||
+	    (major_ver == DPRC_MIN_VER_MAJOR &&
+	     minor_ver < DPRC_MIN_VER_MINOR)) {
+		dev_err(&mc_dev->dev,
+			"ERROR: DPRC version %d.%d not supported\n",
+			major_ver, minor_ver);
+		error = -ENOTSUPP;
+		goto error_cleanup_open;
+	}
+
+	mutex_init(&mc_bus->scan_mutex);
+
+	/*
+	 * Discover MC objects in DPRC object:
+	 */
+	error = dprc_scan_container(mc_dev);
+	if (error < 0)
+		goto error_cleanup_open;
+
+	/*
+	 * Configure interrupt for the DPRC object associated with this MC bus:
+	 */
+	error = dprc_setup_irq(mc_dev);
+	if (error < 0)
+		goto error_cleanup_open;
+
+	dev_info(&mc_dev->dev, "DPRC device bound to driver");
+	return 0;
+
+error_cleanup_open:
+	(void)dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
+
+error_cleanup_msi_domain:
+	if (msi_domain_set)
+		dev_set_msi_domain(&mc_dev->dev, NULL);
+
+	if (mc_io_created) {
+		fsl_destroy_mc_io(mc_dev->mc_io);
+		mc_dev->mc_io = NULL;
+	}
+
+	return error;
+}
+
+/*
+ * Tear down interrupt for a given DPRC object
+ */
+static void dprc_teardown_irq(struct fsl_mc_device *mc_dev)
+{
+	struct fsl_mc_device_irq *irq = mc_dev->irqs[0];
+
+	(void)disable_dprc_irq(mc_dev);
+
+	devm_free_irq(&mc_dev->dev, irq->msi_desc->irq, &mc_dev->dev);
+
+	fsl_mc_free_irqs(mc_dev);
+}
+
+/**
+ * dprc_remove - callback invoked when a DPRC is being unbound from this driver
+ *
+ * @mc_dev: Pointer to fsl-mc device representing the DPRC
+ *
+ * It removes the DPRC's child objects from Linux (not from the MC) and
+ * closes the DPRC device in the MC.
+ * It tears down the interrupts that were configured for the DPRC device.
+ * It destroys the interrupt pool associated with this MC bus.
+ */
+static int dprc_remove(struct fsl_mc_device *mc_dev)
+{
+	int error;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_dev);
+
+	if (!is_fsl_mc_bus_dprc(mc_dev))
+		return -EINVAL;
+	if (!mc_dev->mc_io)
+		return -EINVAL;
+
+	if (!mc_bus->irq_resources)
+		return -EINVAL;
+
+	if (dev_get_msi_domain(&mc_dev->dev))
+		dprc_teardown_irq(mc_dev);
+
+	device_for_each_child(&mc_dev->dev, NULL, __fsl_mc_device_remove);
+
+	if (dev_get_msi_domain(&mc_dev->dev)) {
+		fsl_mc_cleanup_irq_pool(mc_bus);
+		dev_set_msi_domain(&mc_dev->dev, NULL);
+	}
+
+	fsl_mc_cleanup_all_resource_pools(mc_dev);
+
+	error = dprc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
+	if (error < 0)
+		dev_err(&mc_dev->dev, "dprc_close() failed: %d\n", error);
+
+	if (!fsl_mc_is_root_dprc(&mc_dev->dev)) {
+		fsl_destroy_mc_io(mc_dev->mc_io);
+		mc_dev->mc_io = NULL;
+	}
+
+	dev_info(&mc_dev->dev, "DPRC device unbound from driver");
+	return 0;
+}
+
+static const struct fsl_mc_device_id match_id_table[] = {
+	{
+	 .vendor = FSL_MC_VENDOR_FREESCALE,
+	 .obj_type = "dprc"},
+	{.vendor = 0x0},
+};
+
+static struct fsl_mc_driver dprc_driver = {
+	.driver = {
+		   .name = FSL_MC_DPRC_DRIVER_NAME,
+		   .owner = THIS_MODULE,
+		   .pm = NULL,
+		   },
+	.match_id_table = match_id_table,
+	.probe = dprc_probe,
+	.remove = dprc_remove,
+};
+
+int __init dprc_driver_init(void)
+{
+	return fsl_mc_driver_register(&dprc_driver);
+}
+
+void dprc_driver_exit(void)
+{
+	fsl_mc_driver_unregister(&dprc_driver);
+}
diff --git a/drivers/bus/fsl-mc/dprc.c b/drivers/bus/fsl-mc/dprc.c
new file mode 100644
index 000000000..1c3f62182
--- /dev/null
+++ b/drivers/bus/fsl-mc/dprc.c
@@ -0,0 +1,532 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ */
+#include <linux/kernel.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * dprc_open() - Open DPRC object for use
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @container_id: Container ID to open
+ * @token:	Returned token of DPRC object
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ *
+ * @warning	Required before any operation on the object.
+ */
+int dprc_open(struct fsl_mc_io *mc_io,
+	      u32 cmd_flags,
+	      int container_id,
+	      u16 *token)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_open *cmd_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_OPEN, cmd_flags,
+					  0);
+	cmd_params = (struct dprc_cmd_open *)cmd.params;
+	cmd_params->container_id = cpu_to_le32(container_id);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*token = mc_cmd_hdr_read_token(&cmd);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dprc_open);
+
+/**
+ * dprc_close() - Close the control session of the object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ *
+ * After this function is called, no further operations are
+ * allowed on the object without opening a new control session.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_close(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       u16 token)
+{
+	struct fsl_mc_command cmd = { 0 };
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLOSE, cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dprc_close);
+
+/**
+ * dprc_set_irq() - Set IRQ information for the DPRC to trigger an interrupt.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @irq_index:	Identifies the interrupt index to configure
+ * @irq_cfg:	IRQ configuration
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_set_irq(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token,
+		 u8 irq_index,
+		 struct dprc_irq_cfg *irq_cfg)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_set_irq *cmd_params;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dprc_cmd_set_irq *)cmd.params;
+	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
+	cmd_params->irq_index = irq_index;
+	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
+	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dprc_set_irq_enable() - Set overall interrupt state.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @irq_index:	The interrupt index to configure
+ * @en:		Interrupt state - enable = 1, disable = 0
+ *
+ * Allows GPP software to control when interrupts are generated.
+ * Each interrupt can have up to 32 causes.  The enable/disable control's the
+ * overall interrupt state. if the interrupt is disabled no causes will cause
+ * an interrupt.
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_set_irq_enable(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			u8 irq_index,
+			u8 en)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_set_irq_enable *cmd_params;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_ENABLE,
+					  cmd_flags, token);
+	cmd_params = (struct dprc_cmd_set_irq_enable *)cmd.params;
+	cmd_params->enable = en & DPRC_ENABLE;
+	cmd_params->irq_index = irq_index;
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dprc_set_irq_mask() - Set interrupt mask.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @irq_index:	The interrupt index to configure
+ * @mask:	event mask to trigger interrupt;
+ *			each bit:
+ *				0 = ignore event
+ *				1 = consider event for asserting irq
+ *
+ * Every interrupt can have up to 32 causes and the interrupt model supports
+ * masking/unmasking each cause independently
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_set_irq_mask(struct fsl_mc_io *mc_io,
+		      u32 cmd_flags,
+		      u16 token,
+		      u8 irq_index,
+		      u32 mask)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_set_irq_mask *cmd_params;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_IRQ_MASK,
+					  cmd_flags, token);
+	cmd_params = (struct dprc_cmd_set_irq_mask *)cmd.params;
+	cmd_params->mask = cpu_to_le32(mask);
+	cmd_params->irq_index = irq_index;
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dprc_get_irq_status() - Get the current status of any pending interrupts.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @irq_index:	The interrupt index to configure
+ * @status:	Returned interrupts status - one bit per cause:
+ *			0 = no interrupt pending
+ *			1 = interrupt pending
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_irq_status(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			u8 irq_index,
+			u32 *status)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_get_irq_status *cmd_params;
+	struct dprc_rsp_get_irq_status *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_IRQ_STATUS,
+					  cmd_flags, token);
+	cmd_params = (struct dprc_cmd_get_irq_status *)cmd.params;
+	cmd_params->status = cpu_to_le32(*status);
+	cmd_params->irq_index = irq_index;
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dprc_rsp_get_irq_status *)cmd.params;
+	*status = le32_to_cpu(rsp_params->status);
+
+	return 0;
+}
+
+/**
+ * dprc_clear_irq_status() - Clear a pending interrupt's status
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @irq_index:	The interrupt index to configure
+ * @status:	bits to clear (W1C) - one bit per cause:
+ *					0 = don't change
+ *					1 = clear status bit
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_clear_irq_status(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 token,
+			  u8 irq_index,
+			  u32 status)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_clear_irq_status *cmd_params;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_CLEAR_IRQ_STATUS,
+					  cmd_flags, token);
+	cmd_params = (struct dprc_cmd_clear_irq_status *)cmd.params;
+	cmd_params->status = cpu_to_le32(status);
+	cmd_params->irq_index = irq_index;
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+
+/**
+ * dprc_get_attributes() - Obtains container attributes
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @attributes	Returned container attributes
+ *
+ * Return:     '0' on Success; Error code otherwise.
+ */
+int dprc_get_attributes(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			struct dprc_attributes *attr)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_rsp_get_attributes *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_ATTR,
+					  cmd_flags,
+					  token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dprc_rsp_get_attributes *)cmd.params;
+	attr->container_id = le32_to_cpu(rsp_params->container_id);
+	attr->icid = le16_to_cpu(rsp_params->icid);
+	attr->options = le32_to_cpu(rsp_params->options);
+	attr->portal_id = le32_to_cpu(rsp_params->portal_id);
+
+	return 0;
+}
+
+/**
+ * dprc_get_obj_count() - Obtains the number of objects in the DPRC
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @obj_count:	Number of objects assigned to the DPRC
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_obj_count(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       int *obj_count)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_rsp_get_obj_count *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_COUNT,
+					  cmd_flags, token);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dprc_rsp_get_obj_count *)cmd.params;
+	*obj_count = le32_to_cpu(rsp_params->obj_count);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dprc_get_obj_count);
+
+/**
+ * dprc_get_obj() - Get general information on an object
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @obj_index:	Index of the object to be queried (< obj_count)
+ * @obj_desc:	Returns the requested object descriptor
+ *
+ * The object descriptors are retrieved one by one by incrementing
+ * obj_index up to (not including) the value of obj_count returned
+ * from dprc_get_obj_count(). dprc_get_obj_count() must
+ * be called prior to dprc_get_obj().
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_obj(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token,
+		 int obj_index,
+		 struct fsl_mc_obj_desc *obj_desc)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_get_obj *cmd_params;
+	struct dprc_rsp_get_obj *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dprc_cmd_get_obj *)cmd.params;
+	cmd_params->obj_index = cpu_to_le32(obj_index);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dprc_rsp_get_obj *)cmd.params;
+	obj_desc->id = le32_to_cpu(rsp_params->id);
+	obj_desc->vendor = le16_to_cpu(rsp_params->vendor);
+	obj_desc->irq_count = rsp_params->irq_count;
+	obj_desc->region_count = rsp_params->region_count;
+	obj_desc->state = le32_to_cpu(rsp_params->state);
+	obj_desc->ver_major = le16_to_cpu(rsp_params->version_major);
+	obj_desc->ver_minor = le16_to_cpu(rsp_params->version_minor);
+	obj_desc->flags = le16_to_cpu(rsp_params->flags);
+	strncpy(obj_desc->type, rsp_params->type, 16);
+	obj_desc->type[15] = '\0';
+	strncpy(obj_desc->label, rsp_params->label, 16);
+	obj_desc->label[15] = '\0';
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dprc_get_obj);
+
+/**
+ * dprc_set_obj_irq() - Set IRQ information for object to trigger an interrupt.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @obj_type:	Type of the object to set its IRQ
+ * @obj_id:	ID of the object to set its IRQ
+ * @irq_index:	The interrupt index to configure
+ * @irq_cfg:	IRQ configuration
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_set_obj_irq(struct fsl_mc_io *mc_io,
+		     u32 cmd_flags,
+		     u16 token,
+		     char *obj_type,
+		     int obj_id,
+		     u8 irq_index,
+		     struct dprc_irq_cfg *irq_cfg)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_set_obj_irq *cmd_params;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_SET_OBJ_IRQ,
+					  cmd_flags,
+					  token);
+	cmd_params = (struct dprc_cmd_set_obj_irq *)cmd.params;
+	cmd_params->irq_val = cpu_to_le32(irq_cfg->val);
+	cmd_params->irq_index = irq_index;
+	cmd_params->irq_addr = cpu_to_le64(irq_cfg->paddr);
+	cmd_params->irq_num = cpu_to_le32(irq_cfg->irq_num);
+	cmd_params->obj_id = cpu_to_le32(obj_id);
+	strncpy(cmd_params->obj_type, obj_type, 16);
+	cmd_params->obj_type[15] = '\0';
+
+	/* send command to mc*/
+	return mc_send_command(mc_io, &cmd);
+}
+EXPORT_SYMBOL_GPL(dprc_set_obj_irq);
+
+/**
+ * dprc_get_obj_region() - Get region information for a specified object.
+ * @mc_io:	Pointer to MC portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @token:	Token of DPRC object
+ * @obj_type;	Object type as returned in dprc_get_obj()
+ * @obj_id:	Unique object instance as returned in dprc_get_obj()
+ * @region_index: The specific region to query
+ * @region_desc:  Returns the requested region descriptor
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_obj_region(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			char *obj_type,
+			int obj_id,
+			u8 region_index,
+			struct dprc_region_desc *region_desc)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dprc_cmd_get_obj_region *cmd_params;
+	struct dprc_rsp_get_obj_region *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_OBJ_REG,
+					  cmd_flags, token);
+	cmd_params = (struct dprc_cmd_get_obj_region *)cmd.params;
+	cmd_params->obj_id = cpu_to_le32(obj_id);
+	cmd_params->region_index = region_index;
+	strncpy(cmd_params->obj_type, obj_type, 16);
+	cmd_params->obj_type[15] = '\0';
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dprc_rsp_get_obj_region *)cmd.params;
+	region_desc->base_offset = le64_to_cpu(rsp_params->base_addr);
+	region_desc->size = le32_to_cpu(rsp_params->size);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(dprc_get_obj_region);
+
+/**
+ * dprc_get_api_version - Get Data Path Resource Container API version
+ * @mc_io:	Pointer to Mc portal's I/O object
+ * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
+ * @major_ver:	Major version of Data Path Resource Container API
+ * @minor_ver:	Minor version of Data Path Resource Container API
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_api_version(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 *major_ver,
+			 u16 *minor_ver)
+{
+	struct fsl_mc_command cmd = { 0 };
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_API_VERSION,
+					  cmd_flags, 0);
+
+	/* send command to mc */
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	mc_cmd_read_api_version(&cmd, major_ver, minor_ver);
+
+	return 0;
+}
+
+/**
+ * dprc_get_container_id - Get container ID associated with a given portal.
+ * @mc_io:		Pointer to Mc portal's I/O object
+ * @cmd_flags:		Command flags; one or more of 'MC_CMD_FLAG_'
+ * @container_id:	Requested container id
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+int dprc_get_container_id(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  int *container_id)
+{
+	struct fsl_mc_command cmd = { 0 };
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPRC_CMDID_GET_CONT_ID,
+					  cmd_flags,
+					  0);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	*container_id = (int)mc_cmd_read_object_id(&cmd);
+
+	return 0;
+}
diff --git a/drivers/bus/fsl-mc/fsl-mc-allocator.c b/drivers/bus/fsl-mc/fsl-mc-allocator.c
new file mode 100644
index 000000000..9cb0733a0
--- /dev/null
+++ b/drivers/bus/fsl-mc/fsl-mc-allocator.c
@@ -0,0 +1,655 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * fsl-mc object allocator driver
+ *
+ * Copyright (C) 2013-2016 Freescale Semiconductor, Inc.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+static bool __must_check fsl_mc_is_allocatable(struct fsl_mc_device *mc_dev)
+{
+	return is_fsl_mc_bus_dpbp(mc_dev) ||
+	       is_fsl_mc_bus_dpmcp(mc_dev) ||
+	       is_fsl_mc_bus_dpcon(mc_dev);
+}
+
+/**
+ * fsl_mc_resource_pool_add_device - add allocatable object to a resource
+ * pool of a given fsl-mc bus
+ *
+ * @mc_bus: pointer to the fsl-mc bus
+ * @pool_type: pool type
+ * @mc_dev: pointer to allocatable fsl-mc device
+ */
+static int __must_check fsl_mc_resource_pool_add_device(struct fsl_mc_bus
+								*mc_bus,
+							enum fsl_mc_pool_type
+								pool_type,
+							struct fsl_mc_device
+								*mc_dev)
+{
+	struct fsl_mc_resource_pool *res_pool;
+	struct fsl_mc_resource *resource;
+	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
+	int error = -EINVAL;
+
+	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
+		goto out;
+	if (!fsl_mc_is_allocatable(mc_dev))
+		goto out;
+	if (mc_dev->resource)
+		goto out;
+
+	res_pool = &mc_bus->resource_pools[pool_type];
+	if (res_pool->type != pool_type)
+		goto out;
+	if (res_pool->mc_bus != mc_bus)
+		goto out;
+
+	mutex_lock(&res_pool->mutex);
+
+	if (res_pool->max_count < 0)
+		goto out_unlock;
+	if (res_pool->free_count < 0 ||
+	    res_pool->free_count > res_pool->max_count)
+		goto out_unlock;
+
+	resource = devm_kzalloc(&mc_bus_dev->dev, sizeof(*resource),
+				GFP_KERNEL);
+	if (!resource) {
+		error = -ENOMEM;
+		dev_err(&mc_bus_dev->dev,
+			"Failed to allocate memory for fsl_mc_resource\n");
+		goto out_unlock;
+	}
+
+	resource->type = pool_type;
+	resource->id = mc_dev->obj_desc.id;
+	resource->data = mc_dev;
+	resource->parent_pool = res_pool;
+	INIT_LIST_HEAD(&resource->node);
+	list_add_tail(&resource->node, &res_pool->free_list);
+	mc_dev->resource = resource;
+	res_pool->free_count++;
+	res_pool->max_count++;
+	error = 0;
+out_unlock:
+	mutex_unlock(&res_pool->mutex);
+out:
+	return error;
+}
+
+/**
+ * fsl_mc_resource_pool_remove_device - remove an allocatable device from a
+ * resource pool
+ *
+ * @mc_dev: pointer to allocatable fsl-mc device
+ *
+ * It permanently removes an allocatable fsl-mc device from the resource
+ * pool. It's an error if the device is in use.
+ */
+static int __must_check fsl_mc_resource_pool_remove_device(struct fsl_mc_device
+								   *mc_dev)
+{
+	struct fsl_mc_device *mc_bus_dev;
+	struct fsl_mc_bus *mc_bus;
+	struct fsl_mc_resource_pool *res_pool;
+	struct fsl_mc_resource *resource;
+	int error = -EINVAL;
+
+	if (!fsl_mc_is_allocatable(mc_dev))
+		goto out;
+
+	resource = mc_dev->resource;
+	if (!resource || resource->data != mc_dev)
+		goto out;
+
+	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
+	mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	res_pool = resource->parent_pool;
+	if (res_pool != &mc_bus->resource_pools[resource->type])
+		goto out;
+
+	mutex_lock(&res_pool->mutex);
+
+	if (res_pool->max_count <= 0)
+		goto out_unlock;
+	if (res_pool->free_count <= 0 ||
+	    res_pool->free_count > res_pool->max_count)
+		goto out_unlock;
+
+	/*
+	 * If the device is currently allocated, its resource is not
+	 * in the free list and thus, the device cannot be removed.
+	 */
+	if (list_empty(&resource->node)) {
+		error = -EBUSY;
+		dev_err(&mc_bus_dev->dev,
+			"Device %s cannot be removed from resource pool\n",
+			dev_name(&mc_dev->dev));
+		goto out_unlock;
+	}
+
+	list_del_init(&resource->node);
+	res_pool->free_count--;
+	res_pool->max_count--;
+
+	devm_kfree(&mc_bus_dev->dev, resource);
+	mc_dev->resource = NULL;
+	error = 0;
+out_unlock:
+	mutex_unlock(&res_pool->mutex);
+out:
+	return error;
+}
+
+static const char *const fsl_mc_pool_type_strings[] = {
+	[FSL_MC_POOL_DPMCP] = "dpmcp",
+	[FSL_MC_POOL_DPBP] = "dpbp",
+	[FSL_MC_POOL_DPCON] = "dpcon",
+	[FSL_MC_POOL_IRQ] = "irq",
+};
+
+static int __must_check object_type_to_pool_type(const char *object_type,
+						 enum fsl_mc_pool_type
+								*pool_type)
+{
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(fsl_mc_pool_type_strings); i++) {
+		if (strcmp(object_type, fsl_mc_pool_type_strings[i]) == 0) {
+			*pool_type = i;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+int __must_check fsl_mc_resource_allocate(struct fsl_mc_bus *mc_bus,
+					  enum fsl_mc_pool_type pool_type,
+					  struct fsl_mc_resource **new_resource)
+{
+	struct fsl_mc_resource_pool *res_pool;
+	struct fsl_mc_resource *resource;
+	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
+	int error = -EINVAL;
+
+	BUILD_BUG_ON(ARRAY_SIZE(fsl_mc_pool_type_strings) !=
+		     FSL_MC_NUM_POOL_TYPES);
+
+	*new_resource = NULL;
+	if (pool_type < 0 || pool_type >= FSL_MC_NUM_POOL_TYPES)
+		goto out;
+
+	res_pool = &mc_bus->resource_pools[pool_type];
+	if (res_pool->mc_bus != mc_bus)
+		goto out;
+
+	mutex_lock(&res_pool->mutex);
+	resource = list_first_entry_or_null(&res_pool->free_list,
+					    struct fsl_mc_resource, node);
+
+	if (!resource) {
+		error = -ENXIO;
+		dev_err(&mc_bus_dev->dev,
+			"No more resources of type %s left\n",
+			fsl_mc_pool_type_strings[pool_type]);
+		goto out_unlock;
+	}
+
+	if (resource->type != pool_type)
+		goto out_unlock;
+	if (resource->parent_pool != res_pool)
+		goto out_unlock;
+	if (res_pool->free_count <= 0 ||
+	    res_pool->free_count > res_pool->max_count)
+		goto out_unlock;
+
+	list_del_init(&resource->node);
+
+	res_pool->free_count--;
+	error = 0;
+out_unlock:
+	mutex_unlock(&res_pool->mutex);
+	*new_resource = resource;
+out:
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_resource_allocate);
+
+void fsl_mc_resource_free(struct fsl_mc_resource *resource)
+{
+	struct fsl_mc_resource_pool *res_pool;
+
+	res_pool = resource->parent_pool;
+	if (resource->type != res_pool->type)
+		return;
+
+	mutex_lock(&res_pool->mutex);
+	if (res_pool->free_count < 0 ||
+	    res_pool->free_count >= res_pool->max_count)
+		goto out_unlock;
+
+	if (!list_empty(&resource->node))
+		goto out_unlock;
+
+	list_add_tail(&resource->node, &res_pool->free_list);
+	res_pool->free_count++;
+out_unlock:
+	mutex_unlock(&res_pool->mutex);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_resource_free);
+
+/**
+ * fsl_mc_object_allocate - Allocates an fsl-mc object of the given
+ * pool type from a given fsl-mc bus instance
+ *
+ * @mc_dev: fsl-mc device which is used in conjunction with the
+ * allocated object
+ * @pool_type: pool type
+ * @new_mc_dev: pointer to area where the pointer to the allocated device
+ * is to be returned
+ *
+ * Allocatable objects are always used in conjunction with some functional
+ * device.  This function allocates an object of the specified type from
+ * the DPRC containing the functional device.
+ *
+ * NOTE: pool_type must be different from FSL_MC_POOL_MCP, since MC
+ * portals are allocated using fsl_mc_portal_allocate(), instead of
+ * this function.
+ */
+int __must_check fsl_mc_object_allocate(struct fsl_mc_device *mc_dev,
+					enum fsl_mc_pool_type pool_type,
+					struct fsl_mc_device **new_mc_adev)
+{
+	struct fsl_mc_device *mc_bus_dev;
+	struct fsl_mc_bus *mc_bus;
+	struct fsl_mc_device *mc_adev;
+	int error = -EINVAL;
+	struct fsl_mc_resource *resource = NULL;
+
+	*new_mc_adev = NULL;
+	if (mc_dev->flags & FSL_MC_IS_DPRC)
+		goto error;
+
+	if (!dev_is_fsl_mc(mc_dev->dev.parent))
+		goto error;
+
+	if (pool_type == FSL_MC_POOL_DPMCP)
+		goto error;
+
+	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
+	mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	error = fsl_mc_resource_allocate(mc_bus, pool_type, &resource);
+	if (error < 0)
+		goto error;
+
+	mc_adev = resource->data;
+	if (!mc_adev) {
+		error = -EINVAL;
+		goto error;
+	}
+
+	*new_mc_adev = mc_adev;
+	return 0;
+error:
+	if (resource)
+		fsl_mc_resource_free(resource);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_object_allocate);
+
+/**
+ * fsl_mc_object_free - Returns an fsl-mc object to the resource
+ * pool where it came from.
+ * @mc_adev: Pointer to the fsl-mc device
+ */
+void fsl_mc_object_free(struct fsl_mc_device *mc_adev)
+{
+	struct fsl_mc_resource *resource;
+
+	resource = mc_adev->resource;
+	if (resource->type == FSL_MC_POOL_DPMCP)
+		return;
+	if (resource->data != mc_adev)
+		return;
+
+	fsl_mc_resource_free(resource);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_object_free);
+
+/*
+ * A DPRC and the devices in the DPRC all share the same GIC-ITS device
+ * ID.  A block of IRQs is pre-allocated and maintained in a pool
+ * from which devices can allocate them when needed.
+ */
+
+/*
+ * Initialize the interrupt pool associated with an fsl-mc bus.
+ * It allocates a block of IRQs from the GIC-ITS.
+ */
+int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
+			     unsigned int irq_count)
+{
+	unsigned int i;
+	struct msi_desc *msi_desc;
+	struct fsl_mc_device_irq *irq_resources;
+	struct fsl_mc_device_irq *mc_dev_irq;
+	int error;
+	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
+	struct fsl_mc_resource_pool *res_pool =
+			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
+
+	if (irq_count == 0 ||
+	    irq_count > FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS)
+		return -EINVAL;
+
+	error = fsl_mc_msi_domain_alloc_irqs(&mc_bus_dev->dev, irq_count);
+	if (error < 0)
+		return error;
+
+	irq_resources = devm_kcalloc(&mc_bus_dev->dev,
+				     irq_count, sizeof(*irq_resources),
+				     GFP_KERNEL);
+	if (!irq_resources) {
+		error = -ENOMEM;
+		goto cleanup_msi_irqs;
+	}
+
+	for (i = 0; i < irq_count; i++) {
+		mc_dev_irq = &irq_resources[i];
+
+		/*
+		 * NOTE: This mc_dev_irq's MSI addr/value pair will be set
+		 * by the fsl_mc_msi_write_msg() callback
+		 */
+		mc_dev_irq->resource.type = res_pool->type;
+		mc_dev_irq->resource.data = mc_dev_irq;
+		mc_dev_irq->resource.parent_pool = res_pool;
+		INIT_LIST_HEAD(&mc_dev_irq->resource.node);
+		list_add_tail(&mc_dev_irq->resource.node, &res_pool->free_list);
+	}
+
+	for_each_msi_entry(msi_desc, &mc_bus_dev->dev) {
+		mc_dev_irq = &irq_resources[msi_desc->fsl_mc.msi_index];
+		mc_dev_irq->msi_desc = msi_desc;
+		mc_dev_irq->resource.id = msi_desc->irq;
+	}
+
+	res_pool->max_count = irq_count;
+	res_pool->free_count = irq_count;
+	mc_bus->irq_resources = irq_resources;
+	return 0;
+
+cleanup_msi_irqs:
+	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_populate_irq_pool);
+
+/**
+ * Teardown the interrupt pool associated with an fsl-mc bus.
+ * It frees the IRQs that were allocated to the pool, back to the GIC-ITS.
+ */
+void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus)
+{
+	struct fsl_mc_device *mc_bus_dev = &mc_bus->mc_dev;
+	struct fsl_mc_resource_pool *res_pool =
+			&mc_bus->resource_pools[FSL_MC_POOL_IRQ];
+
+	if (!mc_bus->irq_resources)
+		return;
+
+	if (res_pool->max_count == 0)
+		return;
+
+	if (res_pool->free_count != res_pool->max_count)
+		return;
+
+	INIT_LIST_HEAD(&res_pool->free_list);
+	res_pool->max_count = 0;
+	res_pool->free_count = 0;
+	mc_bus->irq_resources = NULL;
+	fsl_mc_msi_domain_free_irqs(&mc_bus_dev->dev);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_cleanup_irq_pool);
+
+/**
+ * Allocate the IRQs required by a given fsl-mc device.
+ */
+int __must_check fsl_mc_allocate_irqs(struct fsl_mc_device *mc_dev)
+{
+	int i;
+	int irq_count;
+	int res_allocated_count = 0;
+	int error = -EINVAL;
+	struct fsl_mc_device_irq **irqs = NULL;
+	struct fsl_mc_bus *mc_bus;
+	struct fsl_mc_resource_pool *res_pool;
+
+	if (mc_dev->irqs)
+		return -EINVAL;
+
+	irq_count = mc_dev->obj_desc.irq_count;
+	if (irq_count == 0)
+		return -EINVAL;
+
+	if (is_fsl_mc_bus_dprc(mc_dev))
+		mc_bus = to_fsl_mc_bus(mc_dev);
+	else
+		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
+
+	if (!mc_bus->irq_resources)
+		return -EINVAL;
+
+	res_pool = &mc_bus->resource_pools[FSL_MC_POOL_IRQ];
+	if (res_pool->free_count < irq_count) {
+		dev_err(&mc_dev->dev,
+			"Not able to allocate %u irqs for device\n", irq_count);
+		return -ENOSPC;
+	}
+
+	irqs = devm_kcalloc(&mc_dev->dev, irq_count, sizeof(irqs[0]),
+			    GFP_KERNEL);
+	if (!irqs)
+		return -ENOMEM;
+
+	for (i = 0; i < irq_count; i++) {
+		struct fsl_mc_resource *resource;
+
+		error = fsl_mc_resource_allocate(mc_bus, FSL_MC_POOL_IRQ,
+						 &resource);
+		if (error < 0)
+			goto error_resource_alloc;
+
+		irqs[i] = to_fsl_mc_irq(resource);
+		res_allocated_count++;
+
+		irqs[i]->mc_dev = mc_dev;
+		irqs[i]->dev_irq_index = i;
+	}
+
+	mc_dev->irqs = irqs;
+	return 0;
+
+error_resource_alloc:
+	for (i = 0; i < res_allocated_count; i++) {
+		irqs[i]->mc_dev = NULL;
+		fsl_mc_resource_free(&irqs[i]->resource);
+	}
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_allocate_irqs);
+
+/*
+ * Frees the IRQs that were allocated for an fsl-mc device.
+ */
+void fsl_mc_free_irqs(struct fsl_mc_device *mc_dev)
+{
+	int i;
+	int irq_count;
+	struct fsl_mc_bus *mc_bus;
+	struct fsl_mc_device_irq **irqs = mc_dev->irqs;
+
+	if (!irqs)
+		return;
+
+	irq_count = mc_dev->obj_desc.irq_count;
+
+	if (is_fsl_mc_bus_dprc(mc_dev))
+		mc_bus = to_fsl_mc_bus(mc_dev);
+	else
+		mc_bus = to_fsl_mc_bus(to_fsl_mc_device(mc_dev->dev.parent));
+
+	if (!mc_bus->irq_resources)
+		return;
+
+	for (i = 0; i < irq_count; i++) {
+		irqs[i]->mc_dev = NULL;
+		fsl_mc_resource_free(&irqs[i]->resource);
+	}
+
+	mc_dev->irqs = NULL;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_free_irqs);
+
+void fsl_mc_init_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
+{
+	int pool_type;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
+
+	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++) {
+		struct fsl_mc_resource_pool *res_pool =
+		    &mc_bus->resource_pools[pool_type];
+
+		res_pool->type = pool_type;
+		res_pool->max_count = 0;
+		res_pool->free_count = 0;
+		res_pool->mc_bus = mc_bus;
+		INIT_LIST_HEAD(&res_pool->free_list);
+		mutex_init(&res_pool->mutex);
+	}
+}
+
+static void fsl_mc_cleanup_resource_pool(struct fsl_mc_device *mc_bus_dev,
+					 enum fsl_mc_pool_type pool_type)
+{
+	struct fsl_mc_resource *resource;
+	struct fsl_mc_resource *next;
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	struct fsl_mc_resource_pool *res_pool =
+					&mc_bus->resource_pools[pool_type];
+	int free_count = 0;
+
+	list_for_each_entry_safe(resource, next, &res_pool->free_list, node) {
+		free_count++;
+		devm_kfree(&mc_bus_dev->dev, resource);
+	}
+}
+
+void fsl_mc_cleanup_all_resource_pools(struct fsl_mc_device *mc_bus_dev)
+{
+	int pool_type;
+
+	for (pool_type = 0; pool_type < FSL_MC_NUM_POOL_TYPES; pool_type++)
+		fsl_mc_cleanup_resource_pool(mc_bus_dev, pool_type);
+}
+
+/**
+ * fsl_mc_allocator_probe - callback invoked when an allocatable device is
+ * being added to the system
+ */
+static int fsl_mc_allocator_probe(struct fsl_mc_device *mc_dev)
+{
+	enum fsl_mc_pool_type pool_type;
+	struct fsl_mc_device *mc_bus_dev;
+	struct fsl_mc_bus *mc_bus;
+	int error;
+
+	if (!fsl_mc_is_allocatable(mc_dev))
+		return -EINVAL;
+
+	mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
+	if (!dev_is_fsl_mc(&mc_bus_dev->dev))
+		return -EINVAL;
+
+	mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	error = object_type_to_pool_type(mc_dev->obj_desc.type, &pool_type);
+	if (error < 0)
+		return error;
+
+	error = fsl_mc_resource_pool_add_device(mc_bus, pool_type, mc_dev);
+	if (error < 0)
+		return error;
+
+	dev_dbg(&mc_dev->dev,
+		"Allocatable fsl-mc device bound to fsl_mc_allocator driver");
+	return 0;
+}
+
+/**
+ * fsl_mc_allocator_remove - callback invoked when an allocatable device is
+ * being removed from the system
+ */
+static int fsl_mc_allocator_remove(struct fsl_mc_device *mc_dev)
+{
+	int error;
+
+	if (!fsl_mc_is_allocatable(mc_dev))
+		return -EINVAL;
+
+	if (mc_dev->resource) {
+		error = fsl_mc_resource_pool_remove_device(mc_dev);
+		if (error < 0)
+			return error;
+	}
+
+	dev_dbg(&mc_dev->dev,
+		"Allocatable fsl-mc device unbound from fsl_mc_allocator driver");
+	return 0;
+}
+
+static const struct fsl_mc_device_id match_id_table[] = {
+	{
+	 .vendor = FSL_MC_VENDOR_FREESCALE,
+	 .obj_type = "dpbp",
+	},
+	{
+	 .vendor = FSL_MC_VENDOR_FREESCALE,
+	 .obj_type = "dpmcp",
+	},
+	{
+	 .vendor = FSL_MC_VENDOR_FREESCALE,
+	 .obj_type = "dpcon",
+	},
+	{.vendor = 0x0},
+};
+
+static struct fsl_mc_driver fsl_mc_allocator_driver = {
+	.driver = {
+		   .name = "fsl_mc_allocator",
+		   .pm = NULL,
+		   },
+	.match_id_table = match_id_table,
+	.probe = fsl_mc_allocator_probe,
+	.remove = fsl_mc_allocator_remove,
+};
+
+int __init fsl_mc_allocator_driver_init(void)
+{
+	return fsl_mc_driver_register(&fsl_mc_allocator_driver);
+}
+
+void fsl_mc_allocator_driver_exit(void)
+{
+	fsl_mc_driver_unregister(&fsl_mc_allocator_driver);
+}
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c
new file mode 100644
index 000000000..5d8266c65
--- /dev/null
+++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
@@ -0,0 +1,948 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Freescale Management Complex (MC) bus driver
+ *
+ * Copyright (C) 2014-2016 Freescale Semiconductor, Inc.
+ * Author: German Rivera <German.Rivera@freescale.com>
+ *
+ */
+
+#define pr_fmt(fmt) "fsl-mc: " fmt
+
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/ioport.h>
+#include <linux/slab.h>
+#include <linux/limits.h>
+#include <linux/bitops.h>
+#include <linux/msi.h>
+#include <linux/dma-mapping.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * Default DMA mask for devices on a fsl-mc bus
+ */
+#define FSL_MC_DEFAULT_DMA_MASK	(~0ULL)
+
+/**
+ * struct fsl_mc - Private data of a "fsl,qoriq-mc" platform device
+ * @root_mc_bus_dev: fsl-mc device representing the root DPRC
+ * @num_translation_ranges: number of entries in addr_translation_ranges
+ * @translation_ranges: array of bus to system address translation ranges
+ */
+struct fsl_mc {
+	struct fsl_mc_device *root_mc_bus_dev;
+	u8 num_translation_ranges;
+	struct fsl_mc_addr_translation_range *translation_ranges;
+};
+
+/**
+ * struct fsl_mc_addr_translation_range - bus to system address translation
+ * range
+ * @mc_region_type: Type of MC region for the range being translated
+ * @start_mc_offset: Start MC offset of the range being translated
+ * @end_mc_offset: MC offset of the first byte after the range (last MC
+ * offset of the range is end_mc_offset - 1)
+ * @start_phys_addr: system physical address corresponding to start_mc_addr
+ */
+struct fsl_mc_addr_translation_range {
+	enum dprc_region_type mc_region_type;
+	u64 start_mc_offset;
+	u64 end_mc_offset;
+	phys_addr_t start_phys_addr;
+};
+
+/**
+ * struct mc_version
+ * @major: Major version number: incremented on API compatibility changes
+ * @minor: Minor version number: incremented on API additions (that are
+ *		backward compatible); reset when major version is incremented
+ * @revision: Internal revision number: incremented on implementation changes
+ *		and/or bug fixes that have no impact on API
+ */
+struct mc_version {
+	u32 major;
+	u32 minor;
+	u32 revision;
+};
+
+/**
+ * fsl_mc_bus_match - device to driver matching callback
+ * @dev: the fsl-mc device to match against
+ * @drv: the device driver to search for matching fsl-mc object type
+ * structures
+ *
+ * Returns 1 on success, 0 otherwise.
+ */
+static int fsl_mc_bus_match(struct device *dev, struct device_driver *drv)
+{
+	const struct fsl_mc_device_id *id;
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+	struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(drv);
+	bool found = false;
+
+	if (!mc_drv->match_id_table)
+		goto out;
+
+	/*
+	 * If the object is not 'plugged' don't match.
+	 * Only exception is the root DPRC, which is a special case.
+	 */
+	if ((mc_dev->obj_desc.state & FSL_MC_OBJ_STATE_PLUGGED) == 0 &&
+	    !fsl_mc_is_root_dprc(&mc_dev->dev))
+		goto out;
+
+	/*
+	 * Traverse the match_id table of the given driver, trying to find
+	 * a matching for the given device.
+	 */
+	for (id = mc_drv->match_id_table; id->vendor != 0x0; id++) {
+		if (id->vendor == mc_dev->obj_desc.vendor &&
+		    strcmp(id->obj_type, mc_dev->obj_desc.type) == 0) {
+			found = true;
+
+			break;
+		}
+	}
+
+out:
+	dev_dbg(dev, "%smatched\n", found ? "" : "not ");
+	return found;
+}
+
+/**
+ * fsl_mc_bus_uevent - callback invoked when a device is added
+ */
+static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+	if (add_uevent_var(env, "MODALIAS=fsl-mc:v%08Xd%s",
+			   mc_dev->obj_desc.vendor,
+			   mc_dev->obj_desc.type))
+		return -ENOMEM;
+
+	return 0;
+}
+
+static ssize_t modalias_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+	return sprintf(buf, "fsl-mc:v%08Xd%s\n", mc_dev->obj_desc.vendor,
+		       mc_dev->obj_desc.type);
+}
+static DEVICE_ATTR_RO(modalias);
+
+static struct attribute *fsl_mc_dev_attrs[] = {
+	&dev_attr_modalias.attr,
+	NULL,
+};
+
+ATTRIBUTE_GROUPS(fsl_mc_dev);
+
+struct bus_type fsl_mc_bus_type = {
+	.name = "fsl-mc",
+	.match = fsl_mc_bus_match,
+	.uevent = fsl_mc_bus_uevent,
+	.dev_groups = fsl_mc_dev_groups,
+};
+EXPORT_SYMBOL_GPL(fsl_mc_bus_type);
+
+struct device_type fsl_mc_bus_dprc_type = {
+	.name = "fsl_mc_bus_dprc"
+};
+
+struct device_type fsl_mc_bus_dpni_type = {
+	.name = "fsl_mc_bus_dpni"
+};
+
+struct device_type fsl_mc_bus_dpio_type = {
+	.name = "fsl_mc_bus_dpio"
+};
+
+struct device_type fsl_mc_bus_dpsw_type = {
+	.name = "fsl_mc_bus_dpsw"
+};
+
+struct device_type fsl_mc_bus_dpbp_type = {
+	.name = "fsl_mc_bus_dpbp"
+};
+
+struct device_type fsl_mc_bus_dpcon_type = {
+	.name = "fsl_mc_bus_dpcon"
+};
+
+struct device_type fsl_mc_bus_dpmcp_type = {
+	.name = "fsl_mc_bus_dpmcp"
+};
+
+struct device_type fsl_mc_bus_dpmac_type = {
+	.name = "fsl_mc_bus_dpmac"
+};
+
+struct device_type fsl_mc_bus_dprtc_type = {
+	.name = "fsl_mc_bus_dprtc"
+};
+
+static struct device_type *fsl_mc_get_device_type(const char *type)
+{
+	static const struct {
+		struct device_type *dev_type;
+		const char *type;
+	} dev_types[] = {
+		{ &fsl_mc_bus_dprc_type, "dprc" },
+		{ &fsl_mc_bus_dpni_type, "dpni" },
+		{ &fsl_mc_bus_dpio_type, "dpio" },
+		{ &fsl_mc_bus_dpsw_type, "dpsw" },
+		{ &fsl_mc_bus_dpbp_type, "dpbp" },
+		{ &fsl_mc_bus_dpcon_type, "dpcon" },
+		{ &fsl_mc_bus_dpmcp_type, "dpmcp" },
+		{ &fsl_mc_bus_dpmac_type, "dpmac" },
+		{ &fsl_mc_bus_dprtc_type, "dprtc" },
+		{ NULL, NULL }
+	};
+	int i;
+
+	for (i = 0; dev_types[i].dev_type; i++)
+		if (!strcmp(dev_types[i].type, type))
+			return dev_types[i].dev_type;
+
+	return NULL;
+}
+
+static int fsl_mc_driver_probe(struct device *dev)
+{
+	struct fsl_mc_driver *mc_drv;
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+	int error;
+
+	mc_drv = to_fsl_mc_driver(dev->driver);
+
+	error = mc_drv->probe(mc_dev);
+	if (error < 0) {
+		if (error != -EPROBE_DEFER)
+			dev_err(dev, "%s failed: %d\n", __func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static int fsl_mc_driver_remove(struct device *dev)
+{
+	struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+	int error;
+
+	error = mc_drv->remove(mc_dev);
+	if (error < 0) {
+		dev_err(dev, "%s failed: %d\n", __func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+static void fsl_mc_driver_shutdown(struct device *dev)
+{
+	struct fsl_mc_driver *mc_drv = to_fsl_mc_driver(dev->driver);
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+	mc_drv->shutdown(mc_dev);
+}
+
+/**
+ * __fsl_mc_driver_register - registers a child device driver with the
+ * MC bus
+ *
+ * This function is implicitly invoked from the registration function of
+ * fsl_mc device drivers, which is generated by the
+ * module_fsl_mc_driver() macro.
+ */
+int __fsl_mc_driver_register(struct fsl_mc_driver *mc_driver,
+			     struct module *owner)
+{
+	int error;
+
+	mc_driver->driver.owner = owner;
+	mc_driver->driver.bus = &fsl_mc_bus_type;
+
+	if (mc_driver->probe)
+		mc_driver->driver.probe = fsl_mc_driver_probe;
+
+	if (mc_driver->remove)
+		mc_driver->driver.remove = fsl_mc_driver_remove;
+
+	if (mc_driver->shutdown)
+		mc_driver->driver.shutdown = fsl_mc_driver_shutdown;
+
+	error = driver_register(&mc_driver->driver);
+	if (error < 0) {
+		pr_err("driver_register() failed for %s: %d\n",
+		       mc_driver->driver.name, error);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(__fsl_mc_driver_register);
+
+/**
+ * fsl_mc_driver_unregister - unregisters a device driver from the
+ * MC bus
+ */
+void fsl_mc_driver_unregister(struct fsl_mc_driver *mc_driver)
+{
+	driver_unregister(&mc_driver->driver);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_driver_unregister);
+
+/**
+ * mc_get_version() - Retrieves the Management Complex firmware
+ *			version information
+ * @mc_io:		Pointer to opaque I/O object
+ * @cmd_flags:		Command flags; one or more of 'MC_CMD_FLAG_'
+ * @mc_ver_info:	Returned version information structure
+ *
+ * Return:	'0' on Success; Error code otherwise.
+ */
+static int mc_get_version(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  struct mc_version *mc_ver_info)
+{
+	struct fsl_mc_command cmd = { 0 };
+	struct dpmng_rsp_get_version *rsp_params;
+	int err;
+
+	/* prepare command */
+	cmd.header = mc_encode_cmd_header(DPMNG_CMDID_GET_VERSION,
+					  cmd_flags,
+					  0);
+
+	/* send command to mc*/
+	err = mc_send_command(mc_io, &cmd);
+	if (err)
+		return err;
+
+	/* retrieve response parameters */
+	rsp_params = (struct dpmng_rsp_get_version *)cmd.params;
+	mc_ver_info->revision = le32_to_cpu(rsp_params->revision);
+	mc_ver_info->major = le32_to_cpu(rsp_params->version_major);
+	mc_ver_info->minor = le32_to_cpu(rsp_params->version_minor);
+
+	return 0;
+}
+
+/**
+ * fsl_mc_get_root_dprc - function to traverse to the root dprc
+ */
+static void fsl_mc_get_root_dprc(struct device *dev,
+				 struct device **root_dprc_dev)
+{
+	if (!dev) {
+		*root_dprc_dev = NULL;
+	} else if (!dev_is_fsl_mc(dev)) {
+		*root_dprc_dev = NULL;
+	} else {
+		*root_dprc_dev = dev;
+		while (dev_is_fsl_mc((*root_dprc_dev)->parent))
+			*root_dprc_dev = (*root_dprc_dev)->parent;
+	}
+}
+
+static int get_dprc_attr(struct fsl_mc_io *mc_io,
+			 int container_id, struct dprc_attributes *attr)
+{
+	u16 dprc_handle;
+	int error;
+
+	error = dprc_open(mc_io, 0, container_id, &dprc_handle);
+	if (error < 0) {
+		dev_err(mc_io->dev, "dprc_open() failed: %d\n", error);
+		return error;
+	}
+
+	memset(attr, 0, sizeof(struct dprc_attributes));
+	error = dprc_get_attributes(mc_io, 0, dprc_handle, attr);
+	if (error < 0) {
+		dev_err(mc_io->dev, "dprc_get_attributes() failed: %d\n",
+			error);
+		goto common_cleanup;
+	}
+
+	error = 0;
+
+common_cleanup:
+	(void)dprc_close(mc_io, 0, dprc_handle);
+	return error;
+}
+
+static int get_dprc_icid(struct fsl_mc_io *mc_io,
+			 int container_id, u16 *icid)
+{
+	struct dprc_attributes attr;
+	int error;
+
+	error = get_dprc_attr(mc_io, container_id, &attr);
+	if (error == 0)
+		*icid = attr.icid;
+
+	return error;
+}
+
+static int translate_mc_addr(struct fsl_mc_device *mc_dev,
+			     enum dprc_region_type mc_region_type,
+			     u64 mc_offset, phys_addr_t *phys_addr)
+{
+	int i;
+	struct device *root_dprc_dev;
+	struct fsl_mc *mc;
+
+	fsl_mc_get_root_dprc(&mc_dev->dev, &root_dprc_dev);
+	mc = dev_get_drvdata(root_dprc_dev->parent);
+
+	if (mc->num_translation_ranges == 0) {
+		/*
+		 * Do identity mapping:
+		 */
+		*phys_addr = mc_offset;
+		return 0;
+	}
+
+	for (i = 0; i < mc->num_translation_ranges; i++) {
+		struct fsl_mc_addr_translation_range *range =
+			&mc->translation_ranges[i];
+
+		if (mc_region_type == range->mc_region_type &&
+		    mc_offset >= range->start_mc_offset &&
+		    mc_offset < range->end_mc_offset) {
+			*phys_addr = range->start_phys_addr +
+				     (mc_offset - range->start_mc_offset);
+			return 0;
+		}
+	}
+
+	return -EFAULT;
+}
+
+static int fsl_mc_device_get_mmio_regions(struct fsl_mc_device *mc_dev,
+					  struct fsl_mc_device *mc_bus_dev)
+{
+	int i;
+	int error;
+	struct resource *regions;
+	struct fsl_mc_obj_desc *obj_desc = &mc_dev->obj_desc;
+	struct device *parent_dev = mc_dev->dev.parent;
+	enum dprc_region_type mc_region_type;
+
+	if (is_fsl_mc_bus_dprc(mc_dev) ||
+	    is_fsl_mc_bus_dpmcp(mc_dev)) {
+		mc_region_type = DPRC_REGION_TYPE_MC_PORTAL;
+	} else if (is_fsl_mc_bus_dpio(mc_dev)) {
+		mc_region_type = DPRC_REGION_TYPE_QBMAN_PORTAL;
+	} else {
+		/*
+		 * This function should not have been called for this MC object
+		 * type, as this object type is not supposed to have MMIO
+		 * regions
+		 */
+		return -EINVAL;
+	}
+
+	regions = kmalloc_array(obj_desc->region_count,
+				sizeof(regions[0]), GFP_KERNEL);
+	if (!regions)
+		return -ENOMEM;
+
+	for (i = 0; i < obj_desc->region_count; i++) {
+		struct dprc_region_desc region_desc;
+
+		error = dprc_get_obj_region(mc_bus_dev->mc_io,
+					    0,
+					    mc_bus_dev->mc_handle,
+					    obj_desc->type,
+					    obj_desc->id, i, &region_desc);
+		if (error < 0) {
+			dev_err(parent_dev,
+				"dprc_get_obj_region() failed: %d\n", error);
+			goto error_cleanup_regions;
+		}
+
+		error = translate_mc_addr(mc_dev, mc_region_type,
+					  region_desc.base_offset,
+					  &regions[i].start);
+		if (error < 0) {
+			dev_err(parent_dev,
+				"Invalid MC offset: %#x (for %s.%d\'s region %d)\n",
+				region_desc.base_offset,
+				obj_desc->type, obj_desc->id, i);
+			goto error_cleanup_regions;
+		}
+
+		regions[i].end = regions[i].start + region_desc.size - 1;
+		regions[i].name = "fsl-mc object MMIO region";
+		regions[i].flags = IORESOURCE_IO;
+		if (region_desc.flags & DPRC_REGION_CACHEABLE)
+			regions[i].flags |= IORESOURCE_CACHEABLE;
+	}
+
+	mc_dev->regions = regions;
+	return 0;
+
+error_cleanup_regions:
+	kfree(regions);
+	return error;
+}
+
+/**
+ * fsl_mc_is_root_dprc - function to check if a given device is a root dprc
+ */
+bool fsl_mc_is_root_dprc(struct device *dev)
+{
+	struct device *root_dprc_dev;
+
+	fsl_mc_get_root_dprc(dev, &root_dprc_dev);
+	if (!root_dprc_dev)
+		return false;
+	return dev == root_dprc_dev;
+}
+
+static void fsl_mc_device_release(struct device *dev)
+{
+	struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev);
+
+	kfree(mc_dev->regions);
+
+	if (is_fsl_mc_bus_dprc(mc_dev))
+		kfree(to_fsl_mc_bus(mc_dev));
+	else
+		kfree(mc_dev);
+}
+
+/**
+ * Add a newly discovered fsl-mc device to be visible in Linux
+ */
+int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
+		      struct fsl_mc_io *mc_io,
+		      struct device *parent_dev,
+		      struct fsl_mc_device **new_mc_dev)
+{
+	int error;
+	struct fsl_mc_device *mc_dev = NULL;
+	struct fsl_mc_bus *mc_bus = NULL;
+	struct fsl_mc_device *parent_mc_dev;
+
+	if (dev_is_fsl_mc(parent_dev))
+		parent_mc_dev = to_fsl_mc_device(parent_dev);
+	else
+		parent_mc_dev = NULL;
+
+	if (strcmp(obj_desc->type, "dprc") == 0) {
+		/*
+		 * Allocate an MC bus device object:
+		 */
+		mc_bus = kzalloc(sizeof(*mc_bus), GFP_KERNEL);
+		if (!mc_bus)
+			return -ENOMEM;
+
+		mc_dev = &mc_bus->mc_dev;
+	} else {
+		/*
+		 * Allocate a regular fsl_mc_device object:
+		 */
+		mc_dev = kzalloc(sizeof(*mc_dev), GFP_KERNEL);
+		if (!mc_dev)
+			return -ENOMEM;
+	}
+
+	mc_dev->obj_desc = *obj_desc;
+	mc_dev->mc_io = mc_io;
+	device_initialize(&mc_dev->dev);
+	mc_dev->dev.parent = parent_dev;
+	mc_dev->dev.bus = &fsl_mc_bus_type;
+	mc_dev->dev.release = fsl_mc_device_release;
+	mc_dev->dev.type = fsl_mc_get_device_type(obj_desc->type);
+	if (!mc_dev->dev.type) {
+		error = -ENODEV;
+		dev_err(parent_dev, "unknown device type %s\n", obj_desc->type);
+		goto error_cleanup_dev;
+	}
+	dev_set_name(&mc_dev->dev, "%s.%d", obj_desc->type, obj_desc->id);
+
+	if (strcmp(obj_desc->type, "dprc") == 0) {
+		struct fsl_mc_io *mc_io2;
+
+		mc_dev->flags |= FSL_MC_IS_DPRC;
+
+		/*
+		 * To get the DPRC's ICID, we need to open the DPRC
+		 * in get_dprc_icid(). For child DPRCs, we do so using the
+		 * parent DPRC's MC portal instead of the child DPRC's MC
+		 * portal, in case the child DPRC is already opened with
+		 * its own portal (e.g., the DPRC used by AIOP).
+		 *
+		 * NOTE: There cannot be more than one active open for a
+		 * given MC object, using the same MC portal.
+		 */
+		if (parent_mc_dev) {
+			/*
+			 * device being added is a child DPRC device
+			 */
+			mc_io2 = parent_mc_dev->mc_io;
+		} else {
+			/*
+			 * device being added is the root DPRC device
+			 */
+			if (!mc_io) {
+				error = -EINVAL;
+				goto error_cleanup_dev;
+			}
+
+			mc_io2 = mc_io;
+		}
+
+		error = get_dprc_icid(mc_io2, obj_desc->id, &mc_dev->icid);
+		if (error < 0)
+			goto error_cleanup_dev;
+	} else {
+		/*
+		 * A non-DPRC object has to be a child of a DPRC, use the
+		 * parent's ICID and interrupt domain.
+		 */
+		mc_dev->icid = parent_mc_dev->icid;
+		mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK;
+		mc_dev->dev.dma_mask = &mc_dev->dma_mask;
+		dev_set_msi_domain(&mc_dev->dev,
+				   dev_get_msi_domain(&parent_mc_dev->dev));
+	}
+
+	/*
+	 * Get MMIO regions for the device from the MC:
+	 *
+	 * NOTE: the root DPRC is a special case as its MMIO region is
+	 * obtained from the device tree
+	 */
+	if (parent_mc_dev && obj_desc->region_count != 0) {
+		error = fsl_mc_device_get_mmio_regions(mc_dev,
+						       parent_mc_dev);
+		if (error < 0)
+			goto error_cleanup_dev;
+	}
+
+	/* Objects are coherent, unless 'no shareability' flag set. */
+	if (!(obj_desc->flags & FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY))
+		arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
+
+	/*
+	 * The device-specific probe callback will get invoked by device_add()
+	 */
+	error = device_add(&mc_dev->dev);
+	if (error < 0) {
+		dev_err(parent_dev,
+			"device_add() failed for device %s: %d\n",
+			dev_name(&mc_dev->dev), error);
+		goto error_cleanup_dev;
+	}
+
+	dev_dbg(parent_dev, "added %s\n", dev_name(&mc_dev->dev));
+
+	*new_mc_dev = mc_dev;
+	return 0;
+
+error_cleanup_dev:
+	kfree(mc_dev->regions);
+	kfree(mc_bus);
+	kfree(mc_dev);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_device_add);
+
+/**
+ * fsl_mc_device_remove - Remove an fsl-mc device from being visible to
+ * Linux
+ *
+ * @mc_dev: Pointer to an fsl-mc device
+ */
+void fsl_mc_device_remove(struct fsl_mc_device *mc_dev)
+{
+	/*
+	 * The device-specific remove callback will get invoked by device_del()
+	 */
+	device_del(&mc_dev->dev);
+	put_device(&mc_dev->dev);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_device_remove);
+
+static int parse_mc_ranges(struct device *dev,
+			   int *paddr_cells,
+			   int *mc_addr_cells,
+			   int *mc_size_cells,
+			   const __be32 **ranges_start)
+{
+	const __be32 *prop;
+	int range_tuple_cell_count;
+	int ranges_len;
+	int tuple_len;
+	struct device_node *mc_node = dev->of_node;
+
+	*ranges_start = of_get_property(mc_node, "ranges", &ranges_len);
+	if (!(*ranges_start) || !ranges_len) {
+		dev_warn(dev,
+			 "missing or empty ranges property for device tree node '%s'\n",
+			 mc_node->name);
+		return 0;
+	}
+
+	*paddr_cells = of_n_addr_cells(mc_node);
+
+	prop = of_get_property(mc_node, "#address-cells", NULL);
+	if (prop)
+		*mc_addr_cells = be32_to_cpup(prop);
+	else
+		*mc_addr_cells = *paddr_cells;
+
+	prop = of_get_property(mc_node, "#size-cells", NULL);
+	if (prop)
+		*mc_size_cells = be32_to_cpup(prop);
+	else
+		*mc_size_cells = of_n_size_cells(mc_node);
+
+	range_tuple_cell_count = *paddr_cells + *mc_addr_cells +
+				 *mc_size_cells;
+
+	tuple_len = range_tuple_cell_count * sizeof(__be32);
+	if (ranges_len % tuple_len != 0) {
+		dev_err(dev, "malformed ranges property '%s'\n", mc_node->name);
+		return -EINVAL;
+	}
+
+	return ranges_len / tuple_len;
+}
+
+static int get_mc_addr_translation_ranges(struct device *dev,
+					  struct fsl_mc_addr_translation_range
+						**ranges,
+					  u8 *num_ranges)
+{
+	int ret;
+	int paddr_cells;
+	int mc_addr_cells;
+	int mc_size_cells;
+	int i;
+	const __be32 *ranges_start;
+	const __be32 *cell;
+
+	ret = parse_mc_ranges(dev,
+			      &paddr_cells,
+			      &mc_addr_cells,
+			      &mc_size_cells,
+			      &ranges_start);
+	if (ret < 0)
+		return ret;
+
+	*num_ranges = ret;
+	if (!ret) {
+		/*
+		 * Missing or empty ranges property ("ranges;") for the
+		 * 'fsl,qoriq-mc' node. In this case, identity mapping
+		 * will be used.
+		 */
+		*ranges = NULL;
+		return 0;
+	}
+
+	*ranges = devm_kcalloc(dev, *num_ranges,
+			       sizeof(struct fsl_mc_addr_translation_range),
+			       GFP_KERNEL);
+	if (!(*ranges))
+		return -ENOMEM;
+
+	cell = ranges_start;
+	for (i = 0; i < *num_ranges; ++i) {
+		struct fsl_mc_addr_translation_range *range = &(*ranges)[i];
+
+		range->mc_region_type = of_read_number(cell, 1);
+		range->start_mc_offset = of_read_number(cell + 1,
+							mc_addr_cells - 1);
+		cell += mc_addr_cells;
+		range->start_phys_addr = of_read_number(cell, paddr_cells);
+		cell += paddr_cells;
+		range->end_mc_offset = range->start_mc_offset +
+				     of_read_number(cell, mc_size_cells);
+
+		cell += mc_size_cells;
+	}
+
+	return 0;
+}
+
+/**
+ * fsl_mc_bus_probe - callback invoked when the root MC bus is being
+ * added
+ */
+static int fsl_mc_bus_probe(struct platform_device *pdev)
+{
+	struct fsl_mc_obj_desc obj_desc;
+	int error;
+	struct fsl_mc *mc;
+	struct fsl_mc_device *mc_bus_dev = NULL;
+	struct fsl_mc_io *mc_io = NULL;
+	int container_id;
+	phys_addr_t mc_portal_phys_addr;
+	u32 mc_portal_size;
+	struct mc_version mc_version;
+	struct resource res;
+
+	mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
+	if (!mc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, mc);
+
+	/*
+	 * Get physical address of MC portal for the root DPRC:
+	 */
+	error = of_address_to_resource(pdev->dev.of_node, 0, &res);
+	if (error < 0) {
+		dev_err(&pdev->dev,
+			"of_address_to_resource() failed for %pOF\n",
+			pdev->dev.of_node);
+		return error;
+	}
+
+	mc_portal_phys_addr = res.start;
+	mc_portal_size = resource_size(&res);
+	error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
+				 mc_portal_size, NULL,
+				 FSL_MC_IO_ATOMIC_CONTEXT_PORTAL, &mc_io);
+	if (error < 0)
+		return error;
+
+	error = mc_get_version(mc_io, 0, &mc_version);
+	if (error != 0) {
+		dev_err(&pdev->dev,
+			"mc_get_version() failed with error %d\n", error);
+		goto error_cleanup_mc_io;
+	}
+
+	dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",
+		 mc_version.major, mc_version.minor, mc_version.revision);
+
+	error = get_mc_addr_translation_ranges(&pdev->dev,
+					       &mc->translation_ranges,
+					       &mc->num_translation_ranges);
+	if (error < 0)
+		goto error_cleanup_mc_io;
+
+	error = dprc_get_container_id(mc_io, 0, &container_id);
+	if (error < 0) {
+		dev_err(&pdev->dev,
+			"dprc_get_container_id() failed: %d\n", error);
+		goto error_cleanup_mc_io;
+	}
+
+	memset(&obj_desc, 0, sizeof(struct fsl_mc_obj_desc));
+	error = dprc_get_api_version(mc_io, 0,
+				     &obj_desc.ver_major,
+				     &obj_desc.ver_minor);
+	if (error < 0)
+		goto error_cleanup_mc_io;
+
+	obj_desc.vendor = FSL_MC_VENDOR_FREESCALE;
+	strcpy(obj_desc.type, "dprc");
+	obj_desc.id = container_id;
+	obj_desc.irq_count = 1;
+	obj_desc.region_count = 0;
+
+	error = fsl_mc_device_add(&obj_desc, mc_io, &pdev->dev, &mc_bus_dev);
+	if (error < 0)
+		goto error_cleanup_mc_io;
+
+	mc->root_mc_bus_dev = mc_bus_dev;
+	return 0;
+
+error_cleanup_mc_io:
+	fsl_destroy_mc_io(mc_io);
+	return error;
+}
+
+/**
+ * fsl_mc_bus_remove - callback invoked when the root MC bus is being
+ * removed
+ */
+static int fsl_mc_bus_remove(struct platform_device *pdev)
+{
+	struct fsl_mc *mc = platform_get_drvdata(pdev);
+
+	if (!fsl_mc_is_root_dprc(&mc->root_mc_bus_dev->dev))
+		return -EINVAL;
+
+	fsl_mc_device_remove(mc->root_mc_bus_dev);
+
+	fsl_destroy_mc_io(mc->root_mc_bus_dev->mc_io);
+	mc->root_mc_bus_dev->mc_io = NULL;
+
+	return 0;
+}
+
+static const struct of_device_id fsl_mc_bus_match_table[] = {
+	{.compatible = "fsl,qoriq-mc",},
+	{},
+};
+
+MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table);
+
+static struct platform_driver fsl_mc_bus_driver = {
+	.driver = {
+		   .name = "fsl_mc_bus",
+		   .pm = NULL,
+		   .of_match_table = fsl_mc_bus_match_table,
+		   },
+	.probe = fsl_mc_bus_probe,
+	.remove = fsl_mc_bus_remove,
+};
+
+static int __init fsl_mc_bus_driver_init(void)
+{
+	int error;
+
+	error = bus_register(&fsl_mc_bus_type);
+	if (error < 0) {
+		pr_err("bus type registration failed: %d\n", error);
+		goto error_cleanup_cache;
+	}
+
+	error = platform_driver_register(&fsl_mc_bus_driver);
+	if (error < 0) {
+		pr_err("platform_driver_register() failed: %d\n", error);
+		goto error_cleanup_bus;
+	}
+
+	error = dprc_driver_init();
+	if (error < 0)
+		goto error_cleanup_driver;
+
+	error = fsl_mc_allocator_driver_init();
+	if (error < 0)
+		goto error_cleanup_dprc_driver;
+
+	return 0;
+
+error_cleanup_dprc_driver:
+	dprc_driver_exit();
+
+error_cleanup_driver:
+	platform_driver_unregister(&fsl_mc_bus_driver);
+
+error_cleanup_bus:
+	bus_unregister(&fsl_mc_bus_type);
+
+error_cleanup_cache:
+	return error;
+}
+postcore_initcall(fsl_mc_bus_driver_init);
diff --git a/drivers/bus/fsl-mc/fsl-mc-msi.c b/drivers/bus/fsl-mc/fsl-mc-msi.c
new file mode 100644
index 000000000..8b9c66d7c
--- /dev/null
+++ b/drivers/bus/fsl-mc/fsl-mc-msi.c
@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Freescale Management Complex (MC) bus driver MSI support
+ *
+ * Copyright (C) 2015-2016 Freescale Semiconductor, Inc.
+ * Author: German Rivera <German.Rivera@freescale.com>
+ *
+ */
+
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/msi.h>
+
+#include "fsl-mc-private.h"
+
+#ifdef GENERIC_MSI_DOMAIN_OPS
+/*
+ * Generate a unique ID identifying the interrupt (only used within the MSI
+ * irqdomain.  Combine the icid with the interrupt index.
+ */
+static irq_hw_number_t fsl_mc_domain_calc_hwirq(struct fsl_mc_device *dev,
+						struct msi_desc *desc)
+{
+	/*
+	 * Make the base hwirq value for ICID*10000 so it is readable
+	 * as a decimal value in /proc/interrupts.
+	 */
+	return (irq_hw_number_t)(desc->fsl_mc.msi_index + (dev->icid * 10000));
+}
+
+static void fsl_mc_msi_set_desc(msi_alloc_info_t *arg,
+				struct msi_desc *desc)
+{
+	arg->desc = desc;
+	arg->hwirq = fsl_mc_domain_calc_hwirq(to_fsl_mc_device(desc->dev),
+					      desc);
+}
+#else
+#define fsl_mc_msi_set_desc NULL
+#endif
+
+static void fsl_mc_msi_update_dom_ops(struct msi_domain_info *info)
+{
+	struct msi_domain_ops *ops = info->ops;
+
+	if (!ops)
+		return;
+
+	/*
+	 * set_desc should not be set by the caller
+	 */
+	if (!ops->set_desc)
+		ops->set_desc = fsl_mc_msi_set_desc;
+}
+
+static void __fsl_mc_msi_write_msg(struct fsl_mc_device *mc_bus_dev,
+				   struct fsl_mc_device_irq *mc_dev_irq)
+{
+	int error;
+	struct fsl_mc_device *owner_mc_dev = mc_dev_irq->mc_dev;
+	struct msi_desc *msi_desc = mc_dev_irq->msi_desc;
+	struct dprc_irq_cfg irq_cfg;
+
+	/*
+	 * msi_desc->msg.address is 0x0 when this function is invoked in
+	 * the free_irq() code path. In this case, for the MC, we don't
+	 * really need to "unprogram" the MSI, so we just return.
+	 */
+	if (msi_desc->msg.address_lo == 0x0 && msi_desc->msg.address_hi == 0x0)
+		return;
+
+	if (!owner_mc_dev)
+		return;
+
+	irq_cfg.paddr = ((u64)msi_desc->msg.address_hi << 32) |
+			msi_desc->msg.address_lo;
+	irq_cfg.val = msi_desc->msg.data;
+	irq_cfg.irq_num = msi_desc->irq;
+
+	if (owner_mc_dev == mc_bus_dev) {
+		/*
+		 * IRQ is for the mc_bus_dev's DPRC itself
+		 */
+		error = dprc_set_irq(mc_bus_dev->mc_io,
+				     MC_CMD_FLAG_INTR_DIS | MC_CMD_FLAG_PRI,
+				     mc_bus_dev->mc_handle,
+				     mc_dev_irq->dev_irq_index,
+				     &irq_cfg);
+		if (error < 0) {
+			dev_err(&owner_mc_dev->dev,
+				"dprc_set_irq() failed: %d\n", error);
+		}
+	} else {
+		/*
+		 * IRQ is for for a child device of mc_bus_dev
+		 */
+		error = dprc_set_obj_irq(mc_bus_dev->mc_io,
+					 MC_CMD_FLAG_INTR_DIS | MC_CMD_FLAG_PRI,
+					 mc_bus_dev->mc_handle,
+					 owner_mc_dev->obj_desc.type,
+					 owner_mc_dev->obj_desc.id,
+					 mc_dev_irq->dev_irq_index,
+					 &irq_cfg);
+		if (error < 0) {
+			dev_err(&owner_mc_dev->dev,
+				"dprc_obj_set_irq() failed: %d\n", error);
+		}
+	}
+}
+
+/*
+ * NOTE: This function is invoked with interrupts disabled
+ */
+static void fsl_mc_msi_write_msg(struct irq_data *irq_data,
+				 struct msi_msg *msg)
+{
+	struct msi_desc *msi_desc = irq_data_get_msi_desc(irq_data);
+	struct fsl_mc_device *mc_bus_dev = to_fsl_mc_device(msi_desc->dev);
+	struct fsl_mc_bus *mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	struct fsl_mc_device_irq *mc_dev_irq =
+		&mc_bus->irq_resources[msi_desc->fsl_mc.msi_index];
+
+	msi_desc->msg = *msg;
+
+	/*
+	 * Program the MSI (paddr, value) pair in the device:
+	 */
+	__fsl_mc_msi_write_msg(mc_bus_dev, mc_dev_irq);
+}
+
+static void fsl_mc_msi_update_chip_ops(struct msi_domain_info *info)
+{
+	struct irq_chip *chip = info->chip;
+
+	if (!chip)
+		return;
+
+	/*
+	 * irq_write_msi_msg should not be set by the caller
+	 */
+	if (!chip->irq_write_msi_msg)
+		chip->irq_write_msi_msg = fsl_mc_msi_write_msg;
+}
+
+/**
+ * fsl_mc_msi_create_irq_domain - Create a fsl-mc MSI interrupt domain
+ * @np:		Optional device-tree node of the interrupt controller
+ * @info:	MSI domain info
+ * @parent:	Parent irq domain
+ *
+ * Updates the domain and chip ops and creates a fsl-mc MSI
+ * interrupt domain.
+ *
+ * Returns:
+ * A domain pointer or NULL in case of failure.
+ */
+struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode,
+						struct msi_domain_info *info,
+						struct irq_domain *parent)
+{
+	struct irq_domain *domain;
+
+	if (WARN_ON((info->flags & MSI_FLAG_LEVEL_CAPABLE)))
+		info->flags &= ~MSI_FLAG_LEVEL_CAPABLE;
+	if (info->flags & MSI_FLAG_USE_DEF_DOM_OPS)
+		fsl_mc_msi_update_dom_ops(info);
+	if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
+		fsl_mc_msi_update_chip_ops(info);
+
+	domain = msi_create_irq_domain(fwnode, info, parent);
+	if (domain)
+		irq_domain_update_bus_token(domain, DOMAIN_BUS_FSL_MC_MSI);
+
+	return domain;
+}
+
+int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
+			   struct irq_domain **mc_msi_domain)
+{
+	struct irq_domain *msi_domain;
+	struct device_node *mc_of_node = mc_platform_dev->of_node;
+
+	msi_domain = of_msi_get_domain(mc_platform_dev, mc_of_node,
+				       DOMAIN_BUS_FSL_MC_MSI);
+	if (!msi_domain) {
+		pr_err("Unable to find fsl-mc MSI domain for %pOF\n",
+		       mc_of_node);
+
+		return -ENOENT;
+	}
+
+	*mc_msi_domain = msi_domain;
+	return 0;
+}
+
+static void fsl_mc_msi_free_descs(struct device *dev)
+{
+	struct msi_desc *desc, *tmp;
+
+	list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
+		list_del(&desc->list);
+		free_msi_entry(desc);
+	}
+}
+
+static int fsl_mc_msi_alloc_descs(struct device *dev, unsigned int irq_count)
+
+{
+	unsigned int i;
+	int error;
+	struct msi_desc *msi_desc;
+
+	for (i = 0; i < irq_count; i++) {
+		msi_desc = alloc_msi_entry(dev, 1, NULL);
+		if (!msi_desc) {
+			dev_err(dev, "Failed to allocate msi entry\n");
+			error = -ENOMEM;
+			goto cleanup_msi_descs;
+		}
+
+		msi_desc->fsl_mc.msi_index = i;
+		INIT_LIST_HEAD(&msi_desc->list);
+		list_add_tail(&msi_desc->list, dev_to_msi_list(dev));
+	}
+
+	return 0;
+
+cleanup_msi_descs:
+	fsl_mc_msi_free_descs(dev);
+	return error;
+}
+
+int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
+				 unsigned int irq_count)
+{
+	struct irq_domain *msi_domain;
+	int error;
+
+	if (!list_empty(dev_to_msi_list(dev)))
+		return -EINVAL;
+
+	error = fsl_mc_msi_alloc_descs(dev, irq_count);
+	if (error < 0)
+		return error;
+
+	msi_domain = dev_get_msi_domain(dev);
+	if (!msi_domain) {
+		error = -EINVAL;
+		goto cleanup_msi_descs;
+	}
+
+	/*
+	 * NOTE: Calling this function will trigger the invocation of the
+	 * its_fsl_mc_msi_prepare() callback
+	 */
+	error = msi_domain_alloc_irqs(msi_domain, dev, irq_count);
+
+	if (error) {
+		dev_err(dev, "Failed to allocate IRQs\n");
+		goto cleanup_msi_descs;
+	}
+
+	return 0;
+
+cleanup_msi_descs:
+	fsl_mc_msi_free_descs(dev);
+	return error;
+}
+
+void fsl_mc_msi_domain_free_irqs(struct device *dev)
+{
+	struct irq_domain *msi_domain;
+
+	msi_domain = dev_get_msi_domain(dev);
+	if (!msi_domain)
+		return;
+
+	msi_domain_free_irqs(msi_domain, dev);
+
+	if (list_empty(dev_to_msi_list(dev)))
+		return;
+
+	fsl_mc_msi_free_descs(dev);
+}
diff --git a/drivers/bus/fsl-mc/fsl-mc-private.h b/drivers/bus/fsl-mc/fsl-mc-private.h
new file mode 100644
index 000000000..ea11b4fe5
--- /dev/null
+++ b/drivers/bus/fsl-mc/fsl-mc-private.h
@@ -0,0 +1,564 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Freescale Management Complex (MC) bus private declarations
+ *
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ *
+ */
+#ifndef _FSL_MC_PRIVATE_H_
+#define _FSL_MC_PRIVATE_H_
+
+#include <linux/fsl/mc.h>
+#include <linux/mutex.h>
+
+/*
+ * Data Path Management Complex (DPMNG) General API
+ */
+
+/* DPMNG command versioning */
+#define DPMNG_CMD_BASE_VERSION		1
+#define DPMNG_CMD_ID_OFFSET		4
+
+#define DPMNG_CMD(id)	(((id) << DPMNG_CMD_ID_OFFSET) | DPMNG_CMD_BASE_VERSION)
+
+/* DPMNG command IDs */
+#define DPMNG_CMDID_GET_VERSION		DPMNG_CMD(0x831)
+
+struct dpmng_rsp_get_version {
+	__le32 revision;
+	__le32 version_major;
+	__le32 version_minor;
+};
+
+/*
+ * Data Path Management Command Portal (DPMCP) API
+ */
+
+/* Minimal supported DPMCP Version */
+#define DPMCP_MIN_VER_MAJOR		3
+#define DPMCP_MIN_VER_MINOR		0
+
+/* DPMCP command versioning */
+#define DPMCP_CMD_BASE_VERSION		1
+#define DPMCP_CMD_ID_OFFSET		4
+
+#define DPMCP_CMD(id)	(((id) << DPMCP_CMD_ID_OFFSET) | DPMCP_CMD_BASE_VERSION)
+
+/* DPMCP command IDs */
+#define DPMCP_CMDID_CLOSE		DPMCP_CMD(0x800)
+#define DPMCP_CMDID_OPEN		DPMCP_CMD(0x80b)
+#define DPMCP_CMDID_RESET		DPMCP_CMD(0x005)
+
+struct dpmcp_cmd_open {
+	__le32 dpmcp_id;
+};
+
+/*
+ * Initialization and runtime control APIs for DPMCP
+ */
+int dpmcp_open(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       int dpmcp_id,
+	       u16 *token);
+
+int dpmcp_close(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token);
+
+int dpmcp_reset(struct fsl_mc_io *mc_io,
+		u32 cmd_flags,
+		u16 token);
+
+/*
+ * Data Path Resource Container (DPRC) API
+ */
+
+/* Minimal supported DPRC Version */
+#define DPRC_MIN_VER_MAJOR			6
+#define DPRC_MIN_VER_MINOR			0
+
+/* DPRC command versioning */
+#define DPRC_CMD_BASE_VERSION			1
+#define DPRC_CMD_ID_OFFSET			4
+
+#define DPRC_CMD(id)	(((id) << DPRC_CMD_ID_OFFSET) | DPRC_CMD_BASE_VERSION)
+
+/* DPRC command IDs */
+#define DPRC_CMDID_CLOSE                        DPRC_CMD(0x800)
+#define DPRC_CMDID_OPEN                         DPRC_CMD(0x805)
+#define DPRC_CMDID_GET_API_VERSION              DPRC_CMD(0xa05)
+
+#define DPRC_CMDID_GET_ATTR                     DPRC_CMD(0x004)
+
+#define DPRC_CMDID_SET_IRQ                      DPRC_CMD(0x010)
+#define DPRC_CMDID_SET_IRQ_ENABLE               DPRC_CMD(0x012)
+#define DPRC_CMDID_SET_IRQ_MASK                 DPRC_CMD(0x014)
+#define DPRC_CMDID_GET_IRQ_STATUS               DPRC_CMD(0x016)
+#define DPRC_CMDID_CLEAR_IRQ_STATUS             DPRC_CMD(0x017)
+
+#define DPRC_CMDID_GET_CONT_ID                  DPRC_CMD(0x830)
+#define DPRC_CMDID_GET_OBJ_COUNT                DPRC_CMD(0x159)
+#define DPRC_CMDID_GET_OBJ                      DPRC_CMD(0x15A)
+#define DPRC_CMDID_GET_OBJ_REG                  DPRC_CMD(0x15E)
+#define DPRC_CMDID_SET_OBJ_IRQ                  DPRC_CMD(0x15F)
+
+struct dprc_cmd_open {
+	__le32 container_id;
+};
+
+struct dprc_cmd_set_irq {
+	/* cmd word 0 */
+	__le32 irq_val;
+	u8 irq_index;
+	u8 pad[3];
+	/* cmd word 1 */
+	__le64 irq_addr;
+	/* cmd word 2 */
+	__le32 irq_num;
+};
+
+#define DPRC_ENABLE		0x1
+
+struct dprc_cmd_set_irq_enable {
+	u8 enable;
+	u8 pad[3];
+	u8 irq_index;
+};
+
+struct dprc_cmd_set_irq_mask {
+	__le32 mask;
+	u8 irq_index;
+};
+
+struct dprc_cmd_get_irq_status {
+	__le32 status;
+	u8 irq_index;
+};
+
+struct dprc_rsp_get_irq_status {
+	__le32 status;
+};
+
+struct dprc_cmd_clear_irq_status {
+	__le32 status;
+	u8 irq_index;
+};
+
+struct dprc_rsp_get_attributes {
+	/* response word 0 */
+	__le32 container_id;
+	__le16 icid;
+	__le16 pad;
+	/* response word 1 */
+	__le32 options;
+	__le32 portal_id;
+};
+
+struct dprc_rsp_get_obj_count {
+	__le32 pad;
+	__le32 obj_count;
+};
+
+struct dprc_cmd_get_obj {
+	__le32 obj_index;
+};
+
+struct dprc_rsp_get_obj {
+	/* response word 0 */
+	__le32 pad0;
+	__le32 id;
+	/* response word 1 */
+	__le16 vendor;
+	u8 irq_count;
+	u8 region_count;
+	__le32 state;
+	/* response word 2 */
+	__le16 version_major;
+	__le16 version_minor;
+	__le16 flags;
+	__le16 pad1;
+	/* response word 3-4 */
+	u8 type[16];
+	/* response word 5-6 */
+	u8 label[16];
+};
+
+struct dprc_cmd_get_obj_region {
+	/* cmd word 0 */
+	__le32 obj_id;
+	__le16 pad0;
+	u8 region_index;
+	u8 pad1;
+	/* cmd word 1-2 */
+	__le64 pad2[2];
+	/* cmd word 3-4 */
+	u8 obj_type[16];
+};
+
+struct dprc_rsp_get_obj_region {
+	/* response word 0 */
+	__le64 pad;
+	/* response word 1 */
+	__le64 base_addr;
+	/* response word 2 */
+	__le32 size;
+};
+
+struct dprc_cmd_set_obj_irq {
+	/* cmd word 0 */
+	__le32 irq_val;
+	u8 irq_index;
+	u8 pad[3];
+	/* cmd word 1 */
+	__le64 irq_addr;
+	/* cmd word 2 */
+	__le32 irq_num;
+	__le32 obj_id;
+	/* cmd word 3-4 */
+	u8 obj_type[16];
+};
+
+/*
+ * DPRC API for managing and querying DPAA resources
+ */
+int dprc_open(struct fsl_mc_io *mc_io,
+	      u32 cmd_flags,
+	      int container_id,
+	      u16 *token);
+
+int dprc_close(struct fsl_mc_io *mc_io,
+	       u32 cmd_flags,
+	       u16 token);
+
+/* DPRC IRQ events */
+
+/* IRQ event - Indicates that a new object added to the container */
+#define DPRC_IRQ_EVENT_OBJ_ADDED		0x00000001
+/* IRQ event - Indicates that an object was removed from the container */
+#define DPRC_IRQ_EVENT_OBJ_REMOVED		0x00000002
+/*
+ * IRQ event - Indicates that one of the descendant containers that opened by
+ * this container is destroyed
+ */
+#define DPRC_IRQ_EVENT_CONTAINER_DESTROYED	0x00000010
+
+/*
+ * IRQ event - Indicates that on one of the container's opened object is
+ * destroyed
+ */
+#define DPRC_IRQ_EVENT_OBJ_DESTROYED		0x00000020
+
+/* Irq event - Indicates that object is created at the container */
+#define DPRC_IRQ_EVENT_OBJ_CREATED		0x00000040
+
+/**
+ * struct dprc_irq_cfg - IRQ configuration
+ * @paddr:	Address that must be written to signal a message-based interrupt
+ * @val:	Value to write into irq_addr address
+ * @irq_num:	A user defined number associated with this IRQ
+ */
+struct dprc_irq_cfg {
+	     phys_addr_t paddr;
+	     u32 val;
+	     int irq_num;
+};
+
+int dprc_set_irq(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token,
+		 u8 irq_index,
+		 struct dprc_irq_cfg *irq_cfg);
+
+int dprc_set_irq_enable(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			u8 irq_index,
+			u8 en);
+
+int dprc_set_irq_mask(struct fsl_mc_io *mc_io,
+		      u32 cmd_flags,
+		      u16 token,
+		      u8 irq_index,
+		      u32 mask);
+
+int dprc_get_irq_status(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			u8 irq_index,
+			u32 *status);
+
+int dprc_clear_irq_status(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  u16 token,
+			  u8 irq_index,
+			  u32 status);
+
+/**
+ * struct dprc_attributes - Container attributes
+ * @container_id: Container's ID
+ * @icid: Container's ICID
+ * @portal_id: Container's portal ID
+ * @options: Container's options as set at container's creation
+ */
+struct dprc_attributes {
+	int container_id;
+	u16 icid;
+	int portal_id;
+	u64 options;
+};
+
+int dprc_get_attributes(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			struct dprc_attributes *attributes);
+
+int dprc_get_obj_count(struct fsl_mc_io *mc_io,
+		       u32 cmd_flags,
+		       u16 token,
+		       int *obj_count);
+
+int dprc_get_obj(struct fsl_mc_io *mc_io,
+		 u32 cmd_flags,
+		 u16 token,
+		 int obj_index,
+		 struct fsl_mc_obj_desc *obj_desc);
+
+int dprc_set_obj_irq(struct fsl_mc_io *mc_io,
+		     u32 cmd_flags,
+		     u16 token,
+		     char *obj_type,
+		     int obj_id,
+		     u8 irq_index,
+		     struct dprc_irq_cfg *irq_cfg);
+
+/* Region flags */
+/* Cacheable - Indicates that region should be mapped as cacheable */
+#define DPRC_REGION_CACHEABLE	0x00000001
+
+/**
+ * enum dprc_region_type - Region type
+ * @DPRC_REGION_TYPE_MC_PORTAL: MC portal region
+ * @DPRC_REGION_TYPE_QBMAN_PORTAL: Qbman portal region
+ */
+enum dprc_region_type {
+	DPRC_REGION_TYPE_MC_PORTAL,
+	DPRC_REGION_TYPE_QBMAN_PORTAL
+};
+
+/**
+ * struct dprc_region_desc - Mappable region descriptor
+ * @base_offset: Region offset from region's base address.
+ *	For DPMCP and DPRC objects, region base is offset from SoC MC portals
+ *	base address; For DPIO, region base is offset from SoC QMan portals
+ *	base address
+ * @size: Region size (in bytes)
+ * @flags: Region attributes
+ * @type: Portal region type
+ */
+struct dprc_region_desc {
+	u32 base_offset;
+	u32 size;
+	u32 flags;
+	enum dprc_region_type type;
+};
+
+int dprc_get_obj_region(struct fsl_mc_io *mc_io,
+			u32 cmd_flags,
+			u16 token,
+			char *obj_type,
+			int obj_id,
+			u8 region_index,
+			struct dprc_region_desc *region_desc);
+
+int dprc_get_api_version(struct fsl_mc_io *mc_io,
+			 u32 cmd_flags,
+			 u16 *major_ver,
+			 u16 *minor_ver);
+
+int dprc_get_container_id(struct fsl_mc_io *mc_io,
+			  u32 cmd_flags,
+			  int *container_id);
+
+/*
+ * Data Path Buffer Pool (DPBP) API
+ */
+
+/* DPBP Version */
+#define DPBP_VER_MAJOR				3
+#define DPBP_VER_MINOR				2
+
+/* Command versioning */
+#define DPBP_CMD_BASE_VERSION			1
+#define DPBP_CMD_ID_OFFSET			4
+
+#define DPBP_CMD(id)	(((id) << DPBP_CMD_ID_OFFSET) | DPBP_CMD_BASE_VERSION)
+
+/* Command IDs */
+#define DPBP_CMDID_CLOSE		DPBP_CMD(0x800)
+#define DPBP_CMDID_OPEN			DPBP_CMD(0x804)
+
+#define DPBP_CMDID_ENABLE		DPBP_CMD(0x002)
+#define DPBP_CMDID_DISABLE		DPBP_CMD(0x003)
+#define DPBP_CMDID_GET_ATTR		DPBP_CMD(0x004)
+#define DPBP_CMDID_RESET		DPBP_CMD(0x005)
+
+struct dpbp_cmd_open {
+	__le32 dpbp_id;
+};
+
+#define DPBP_ENABLE			0x1
+
+struct dpbp_rsp_get_attributes {
+	/* response word 0 */
+	__le16 pad;
+	__le16 bpid;
+	__le32 id;
+	/* response word 1 */
+	__le16 version_major;
+	__le16 version_minor;
+};
+
+/*
+ * Data Path Concentrator (DPCON) API
+ */
+
+/* DPCON Version */
+#define DPCON_VER_MAJOR				3
+#define DPCON_VER_MINOR				2
+
+/* Command versioning */
+#define DPCON_CMD_BASE_VERSION			1
+#define DPCON_CMD_ID_OFFSET			4
+
+#define DPCON_CMD(id)	(((id) << DPCON_CMD_ID_OFFSET) | DPCON_CMD_BASE_VERSION)
+
+/* Command IDs */
+#define DPCON_CMDID_CLOSE			DPCON_CMD(0x800)
+#define DPCON_CMDID_OPEN			DPCON_CMD(0x808)
+
+#define DPCON_CMDID_ENABLE			DPCON_CMD(0x002)
+#define DPCON_CMDID_DISABLE			DPCON_CMD(0x003)
+#define DPCON_CMDID_GET_ATTR			DPCON_CMD(0x004)
+#define DPCON_CMDID_RESET			DPCON_CMD(0x005)
+
+#define DPCON_CMDID_SET_NOTIFICATION		DPCON_CMD(0x100)
+
+struct dpcon_cmd_open {
+	__le32 dpcon_id;
+};
+
+#define DPCON_ENABLE			1
+
+struct dpcon_rsp_get_attr {
+	/* response word 0 */
+	__le32 id;
+	__le16 qbman_ch_id;
+	u8 num_priorities;
+	u8 pad;
+};
+
+struct dpcon_cmd_set_notification {
+	/* cmd word 0 */
+	__le32 dpio_id;
+	u8 priority;
+	u8 pad[3];
+	/* cmd word 1 */
+	__le64 user_ctx;
+};
+
+/**
+ * Maximum number of total IRQs that can be pre-allocated for an MC bus'
+ * IRQ pool
+ */
+#define FSL_MC_IRQ_POOL_MAX_TOTAL_IRQS	256
+
+/**
+ * struct fsl_mc_resource_pool - Pool of MC resources of a given
+ * type
+ * @type: type of resources in the pool
+ * @max_count: maximum number of resources in the pool
+ * @free_count: number of free resources in the pool
+ * @mutex: mutex to serialize access to the pool's free list
+ * @free_list: anchor node of list of free resources in the pool
+ * @mc_bus: pointer to the MC bus that owns this resource pool
+ */
+struct fsl_mc_resource_pool {
+	enum fsl_mc_pool_type type;
+	int max_count;
+	int free_count;
+	struct mutex mutex;	/* serializes access to free_list */
+	struct list_head free_list;
+	struct fsl_mc_bus *mc_bus;
+};
+
+/**
+ * struct fsl_mc_bus - logical bus that corresponds to a physical DPRC
+ * @mc_dev: fsl-mc device for the bus device itself.
+ * @resource_pools: array of resource pools (one pool per resource type)
+ * for this MC bus. These resources represent allocatable entities
+ * from the physical DPRC.
+ * @irq_resources: Pointer to array of IRQ objects for the IRQ pool
+ * @scan_mutex: Serializes bus scanning
+ * @dprc_attr: DPRC attributes
+ */
+struct fsl_mc_bus {
+	struct fsl_mc_device mc_dev;
+	struct fsl_mc_resource_pool resource_pools[FSL_MC_NUM_POOL_TYPES];
+	struct fsl_mc_device_irq *irq_resources;
+	struct mutex scan_mutex;    /* serializes bus scanning */
+	struct dprc_attributes dprc_attr;
+};
+
+#define to_fsl_mc_bus(_mc_dev) \
+	container_of(_mc_dev, struct fsl_mc_bus, mc_dev)
+
+int __must_check fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
+				   struct fsl_mc_io *mc_io,
+				   struct device *parent_dev,
+				   struct fsl_mc_device **new_mc_dev);
+
+void fsl_mc_device_remove(struct fsl_mc_device *mc_dev);
+
+int __init dprc_driver_init(void);
+
+void dprc_driver_exit(void);
+
+int __init fsl_mc_allocator_driver_init(void);
+
+void fsl_mc_allocator_driver_exit(void);
+
+void fsl_mc_init_all_resource_pools(struct fsl_mc_device *mc_bus_dev);
+
+void fsl_mc_cleanup_all_resource_pools(struct fsl_mc_device *mc_bus_dev);
+
+int __must_check fsl_mc_resource_allocate(struct fsl_mc_bus *mc_bus,
+					  enum fsl_mc_pool_type pool_type,
+					  struct fsl_mc_resource
+							  **new_resource);
+
+void fsl_mc_resource_free(struct fsl_mc_resource *resource);
+
+int fsl_mc_msi_domain_alloc_irqs(struct device *dev,
+				 unsigned int irq_count);
+
+void fsl_mc_msi_domain_free_irqs(struct device *dev);
+
+int fsl_mc_find_msi_domain(struct device *mc_platform_dev,
+			   struct irq_domain **mc_msi_domain);
+
+int fsl_mc_populate_irq_pool(struct fsl_mc_bus *mc_bus,
+			     unsigned int irq_count);
+
+void fsl_mc_cleanup_irq_pool(struct fsl_mc_bus *mc_bus);
+
+int __must_check fsl_create_mc_io(struct device *dev,
+				  phys_addr_t mc_portal_phys_addr,
+				  u32 mc_portal_size,
+				  struct fsl_mc_device *dpmcp_dev,
+				  u32 flags, struct fsl_mc_io **new_mc_io);
+
+void fsl_destroy_mc_io(struct fsl_mc_io *mc_io);
+
+bool fsl_mc_is_root_dprc(struct device *dev);
+
+#endif /* _FSL_MC_PRIVATE_H_ */
diff --git a/drivers/bus/fsl-mc/mc-io.c b/drivers/bus/fsl-mc/mc-io.c
new file mode 100644
index 000000000..3f8065997
--- /dev/null
+++ b/drivers/bus/fsl-mc/mc-io.c
@@ -0,0 +1,273 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+static int fsl_mc_io_set_dpmcp(struct fsl_mc_io *mc_io,
+			       struct fsl_mc_device *dpmcp_dev)
+{
+	int error;
+
+	if (mc_io->dpmcp_dev)
+		return -EINVAL;
+
+	if (dpmcp_dev->mc_io)
+		return -EINVAL;
+
+	error = dpmcp_open(mc_io,
+			   0,
+			   dpmcp_dev->obj_desc.id,
+			   &dpmcp_dev->mc_handle);
+	if (error < 0)
+		return error;
+
+	mc_io->dpmcp_dev = dpmcp_dev;
+	dpmcp_dev->mc_io = mc_io;
+	return 0;
+}
+
+static void fsl_mc_io_unset_dpmcp(struct fsl_mc_io *mc_io)
+{
+	int error;
+	struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev;
+
+	error = dpmcp_close(mc_io,
+			    0,
+			    dpmcp_dev->mc_handle);
+	if (error < 0) {
+		dev_err(&dpmcp_dev->dev, "dpmcp_close() failed: %d\n",
+			error);
+	}
+
+	mc_io->dpmcp_dev = NULL;
+	dpmcp_dev->mc_io = NULL;
+}
+
+/**
+ * Creates an MC I/O object
+ *
+ * @dev: device to be associated with the MC I/O object
+ * @mc_portal_phys_addr: physical address of the MC portal to use
+ * @mc_portal_size: size in bytes of the MC portal
+ * @dpmcp-dev: Pointer to the DPMCP object associated with this MC I/O
+ * object or NULL if none.
+ * @flags: flags for the new MC I/O object
+ * @new_mc_io: Area to return pointer to newly created MC I/O object
+ *
+ * Returns '0' on Success; Error code otherwise.
+ */
+int __must_check fsl_create_mc_io(struct device *dev,
+				  phys_addr_t mc_portal_phys_addr,
+				  u32 mc_portal_size,
+				  struct fsl_mc_device *dpmcp_dev,
+				  u32 flags, struct fsl_mc_io **new_mc_io)
+{
+	int error;
+	struct fsl_mc_io *mc_io;
+	void __iomem *mc_portal_virt_addr;
+	struct resource *res;
+
+	mc_io = devm_kzalloc(dev, sizeof(*mc_io), GFP_KERNEL);
+	if (!mc_io)
+		return -ENOMEM;
+
+	mc_io->dev = dev;
+	mc_io->flags = flags;
+	mc_io->portal_phys_addr = mc_portal_phys_addr;
+	mc_io->portal_size = mc_portal_size;
+	if (flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL)
+		spin_lock_init(&mc_io->spinlock);
+	else
+		mutex_init(&mc_io->mutex);
+
+	res = devm_request_mem_region(dev,
+				      mc_portal_phys_addr,
+				      mc_portal_size,
+				      "mc_portal");
+	if (!res) {
+		dev_err(dev,
+			"devm_request_mem_region failed for MC portal %pa\n",
+			&mc_portal_phys_addr);
+		return -EBUSY;
+	}
+
+	mc_portal_virt_addr = devm_ioremap_nocache(dev,
+						   mc_portal_phys_addr,
+						   mc_portal_size);
+	if (!mc_portal_virt_addr) {
+		dev_err(dev,
+			"devm_ioremap_nocache failed for MC portal %pa\n",
+			&mc_portal_phys_addr);
+		return -ENXIO;
+	}
+
+	mc_io->portal_virt_addr = mc_portal_virt_addr;
+	if (dpmcp_dev) {
+		error = fsl_mc_io_set_dpmcp(mc_io, dpmcp_dev);
+		if (error < 0)
+			goto error_destroy_mc_io;
+	}
+
+	*new_mc_io = mc_io;
+	return 0;
+
+error_destroy_mc_io:
+	fsl_destroy_mc_io(mc_io);
+	return error;
+}
+
+/**
+ * Destroys an MC I/O object
+ *
+ * @mc_io: MC I/O object to destroy
+ */
+void fsl_destroy_mc_io(struct fsl_mc_io *mc_io)
+{
+	struct fsl_mc_device *dpmcp_dev;
+
+	if (!mc_io)
+		return;
+
+	dpmcp_dev = mc_io->dpmcp_dev;
+
+	if (dpmcp_dev)
+		fsl_mc_io_unset_dpmcp(mc_io);
+
+	devm_iounmap(mc_io->dev, mc_io->portal_virt_addr);
+	devm_release_mem_region(mc_io->dev,
+				mc_io->portal_phys_addr,
+				mc_io->portal_size);
+
+	mc_io->portal_virt_addr = NULL;
+	devm_kfree(mc_io->dev, mc_io);
+}
+
+/**
+ * fsl_mc_portal_allocate - Allocates an MC portal
+ *
+ * @mc_dev: MC device for which the MC portal is to be allocated
+ * @mc_io_flags: Flags for the fsl_mc_io object that wraps the allocated
+ * MC portal.
+ * @new_mc_io: Pointer to area where the pointer to the fsl_mc_io object
+ * that wraps the allocated MC portal is to be returned
+ *
+ * This function allocates an MC portal from the device's parent DPRC,
+ * from the corresponding MC bus' pool of MC portals and wraps
+ * it in a new fsl_mc_io object. If 'mc_dev' is a DPRC itself, the
+ * portal is allocated from its own MC bus.
+ */
+int __must_check fsl_mc_portal_allocate(struct fsl_mc_device *mc_dev,
+					u16 mc_io_flags,
+					struct fsl_mc_io **new_mc_io)
+{
+	struct fsl_mc_device *mc_bus_dev;
+	struct fsl_mc_bus *mc_bus;
+	phys_addr_t mc_portal_phys_addr;
+	size_t mc_portal_size;
+	struct fsl_mc_device *dpmcp_dev;
+	int error = -EINVAL;
+	struct fsl_mc_resource *resource = NULL;
+	struct fsl_mc_io *mc_io = NULL;
+
+	if (mc_dev->flags & FSL_MC_IS_DPRC) {
+		mc_bus_dev = mc_dev;
+	} else {
+		if (!dev_is_fsl_mc(mc_dev->dev.parent))
+			return error;
+
+		mc_bus_dev = to_fsl_mc_device(mc_dev->dev.parent);
+	}
+
+	mc_bus = to_fsl_mc_bus(mc_bus_dev);
+	*new_mc_io = NULL;
+	error = fsl_mc_resource_allocate(mc_bus, FSL_MC_POOL_DPMCP, &resource);
+	if (error < 0)
+		return error;
+
+	error = -EINVAL;
+	dpmcp_dev = resource->data;
+
+	if (dpmcp_dev->obj_desc.ver_major < DPMCP_MIN_VER_MAJOR ||
+	    (dpmcp_dev->obj_desc.ver_major == DPMCP_MIN_VER_MAJOR &&
+	     dpmcp_dev->obj_desc.ver_minor < DPMCP_MIN_VER_MINOR)) {
+		dev_err(&dpmcp_dev->dev,
+			"ERROR: Version %d.%d of DPMCP not supported.\n",
+			dpmcp_dev->obj_desc.ver_major,
+			dpmcp_dev->obj_desc.ver_minor);
+		error = -ENOTSUPP;
+		goto error_cleanup_resource;
+	}
+
+	mc_portal_phys_addr = dpmcp_dev->regions[0].start;
+	mc_portal_size = resource_size(dpmcp_dev->regions);
+
+	error = fsl_create_mc_io(&mc_bus_dev->dev,
+				 mc_portal_phys_addr,
+				 mc_portal_size, dpmcp_dev,
+				 mc_io_flags, &mc_io);
+	if (error < 0)
+		goto error_cleanup_resource;
+
+	*new_mc_io = mc_io;
+	return 0;
+
+error_cleanup_resource:
+	fsl_mc_resource_free(resource);
+	return error;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_portal_allocate);
+
+/**
+ * fsl_mc_portal_free - Returns an MC portal to the pool of free MC portals
+ * of a given MC bus
+ *
+ * @mc_io: Pointer to the fsl_mc_io object that wraps the MC portal to free
+ */
+void fsl_mc_portal_free(struct fsl_mc_io *mc_io)
+{
+	struct fsl_mc_device *dpmcp_dev;
+	struct fsl_mc_resource *resource;
+
+	/*
+	 * Every mc_io obtained by calling fsl_mc_portal_allocate() is supposed
+	 * to have a DPMCP object associated with.
+	 */
+	dpmcp_dev = mc_io->dpmcp_dev;
+
+	resource = dpmcp_dev->resource;
+	if (!resource || resource->type != FSL_MC_POOL_DPMCP)
+		return;
+
+	if (resource->data != dpmcp_dev)
+		return;
+
+	fsl_destroy_mc_io(mc_io);
+	fsl_mc_resource_free(resource);
+}
+EXPORT_SYMBOL_GPL(fsl_mc_portal_free);
+
+/**
+ * fsl_mc_portal_reset - Resets the dpmcp object for a given fsl_mc_io object
+ *
+ * @mc_io: Pointer to the fsl_mc_io object that wraps the MC portal to free
+ */
+int fsl_mc_portal_reset(struct fsl_mc_io *mc_io)
+{
+	int error;
+	struct fsl_mc_device *dpmcp_dev = mc_io->dpmcp_dev;
+
+	error = dpmcp_reset(mc_io, 0, dpmcp_dev->mc_handle);
+	if (error < 0) {
+		dev_err(&dpmcp_dev->dev, "dpmcp_reset() failed: %d\n", error);
+		return error;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(fsl_mc_portal_reset);
diff --git a/drivers/bus/fsl-mc/mc-sys.c b/drivers/bus/fsl-mc/mc-sys.c
new file mode 100644
index 000000000..3221a7fba
--- /dev/null
+++ b/drivers/bus/fsl-mc/mc-sys.c
@@ -0,0 +1,296 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright 2013-2016 Freescale Semiconductor Inc.
+ *
+ * I/O services to send MC commands to the MC hardware
+ *
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/io.h>
+#include <linux/io-64-nonatomic-hi-lo.h>
+#include <linux/fsl/mc.h>
+
+#include "fsl-mc-private.h"
+
+/**
+ * Timeout in milliseconds to wait for the completion of an MC command
+ */
+#define MC_CMD_COMPLETION_TIMEOUT_MS	500
+
+/*
+ * usleep_range() min and max values used to throttle down polling
+ * iterations while waiting for MC command completion
+ */
+#define MC_CMD_COMPLETION_POLLING_MIN_SLEEP_USECS    10
+#define MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS    500
+
+static enum mc_cmd_status mc_cmd_hdr_read_status(struct fsl_mc_command *cmd)
+{
+	struct mc_cmd_header *hdr = (struct mc_cmd_header *)&cmd->header;
+
+	return (enum mc_cmd_status)hdr->status;
+}
+
+static u16 mc_cmd_hdr_read_cmdid(struct fsl_mc_command *cmd)
+{
+	struct mc_cmd_header *hdr = (struct mc_cmd_header *)&cmd->header;
+	u16 cmd_id = le16_to_cpu(hdr->cmd_id);
+
+	return cmd_id;
+}
+
+static int mc_status_to_error(enum mc_cmd_status status)
+{
+	static const int mc_status_to_error_map[] = {
+		[MC_CMD_STATUS_OK] = 0,
+		[MC_CMD_STATUS_AUTH_ERR] = -EACCES,
+		[MC_CMD_STATUS_NO_PRIVILEGE] = -EPERM,
+		[MC_CMD_STATUS_DMA_ERR] = -EIO,
+		[MC_CMD_STATUS_CONFIG_ERR] = -ENXIO,
+		[MC_CMD_STATUS_TIMEOUT] = -ETIMEDOUT,
+		[MC_CMD_STATUS_NO_RESOURCE] = -ENAVAIL,
+		[MC_CMD_STATUS_NO_MEMORY] = -ENOMEM,
+		[MC_CMD_STATUS_BUSY] = -EBUSY,
+		[MC_CMD_STATUS_UNSUPPORTED_OP] = -ENOTSUPP,
+		[MC_CMD_STATUS_INVALID_STATE] = -ENODEV,
+	};
+
+	if ((u32)status >= ARRAY_SIZE(mc_status_to_error_map))
+		return -EINVAL;
+
+	return mc_status_to_error_map[status];
+}
+
+static const char *mc_status_to_string(enum mc_cmd_status status)
+{
+	static const char *const status_strings[] = {
+		[MC_CMD_STATUS_OK] = "Command completed successfully",
+		[MC_CMD_STATUS_READY] = "Command ready to be processed",
+		[MC_CMD_STATUS_AUTH_ERR] = "Authentication error",
+		[MC_CMD_STATUS_NO_PRIVILEGE] = "No privilege",
+		[MC_CMD_STATUS_DMA_ERR] = "DMA or I/O error",
+		[MC_CMD_STATUS_CONFIG_ERR] = "Configuration error",
+		[MC_CMD_STATUS_TIMEOUT] = "Operation timed out",
+		[MC_CMD_STATUS_NO_RESOURCE] = "No resources",
+		[MC_CMD_STATUS_NO_MEMORY] = "No memory available",
+		[MC_CMD_STATUS_BUSY] = "Device is busy",
+		[MC_CMD_STATUS_UNSUPPORTED_OP] = "Unsupported operation",
+		[MC_CMD_STATUS_INVALID_STATE] = "Invalid state"
+	};
+
+	if ((unsigned int)status >= ARRAY_SIZE(status_strings))
+		return "Unknown MC error";
+
+	return status_strings[status];
+}
+
+/**
+ * mc_write_command - writes a command to a Management Complex (MC) portal
+ *
+ * @portal: pointer to an MC portal
+ * @cmd: pointer to a filled command
+ */
+static inline void mc_write_command(struct fsl_mc_command __iomem *portal,
+				    struct fsl_mc_command *cmd)
+{
+	int i;
+
+	/* copy command parameters into the portal */
+	for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++)
+		/*
+		 * Data is already in the expected LE byte-order. Do an
+		 * extra LE -> CPU conversion so that the CPU -> LE done in
+		 * the device io write api puts it back in the right order.
+		 */
+		writeq_relaxed(le64_to_cpu(cmd->params[i]), &portal->params[i]);
+
+	/* submit the command by writing the header */
+	writeq(le64_to_cpu(cmd->header), &portal->header);
+}
+
+/**
+ * mc_read_response - reads the response for the last MC command from a
+ * Management Complex (MC) portal
+ *
+ * @portal: pointer to an MC portal
+ * @resp: pointer to command response buffer
+ *
+ * Returns MC_CMD_STATUS_OK on Success; Error code otherwise.
+ */
+static inline enum mc_cmd_status mc_read_response(struct fsl_mc_command __iomem
+						  *portal,
+						  struct fsl_mc_command *resp)
+{
+	int i;
+	enum mc_cmd_status status;
+
+	/* Copy command response header from MC portal: */
+	resp->header = cpu_to_le64(readq_relaxed(&portal->header));
+	status = mc_cmd_hdr_read_status(resp);
+	if (status != MC_CMD_STATUS_OK)
+		return status;
+
+	/* Copy command response data from MC portal: */
+	for (i = 0; i < MC_CMD_NUM_OF_PARAMS; i++)
+		/*
+		 * Data is expected to be in LE byte-order. Do an
+		 * extra CPU -> LE to revert the LE -> CPU done in
+		 * the device io read api.
+		 */
+		resp->params[i] =
+			cpu_to_le64(readq_relaxed(&portal->params[i]));
+
+	return status;
+}
+
+/**
+ * Waits for the completion of an MC command doing preemptible polling.
+ * uslepp_range() is called between polling iterations.
+ *
+ * @mc_io: MC I/O object to be used
+ * @cmd: command buffer to receive MC response
+ * @mc_status: MC command completion status
+ */
+static int mc_polling_wait_preemptible(struct fsl_mc_io *mc_io,
+				       struct fsl_mc_command *cmd,
+				       enum mc_cmd_status *mc_status)
+{
+	enum mc_cmd_status status;
+	unsigned long jiffies_until_timeout =
+		jiffies + msecs_to_jiffies(MC_CMD_COMPLETION_TIMEOUT_MS);
+
+	/*
+	 * Wait for response from the MC hardware:
+	 */
+	for (;;) {
+		status = mc_read_response(mc_io->portal_virt_addr, cmd);
+		if (status != MC_CMD_STATUS_READY)
+			break;
+
+		/*
+		 * TODO: When MC command completion interrupts are supported
+		 * call wait function here instead of usleep_range()
+		 */
+		usleep_range(MC_CMD_COMPLETION_POLLING_MIN_SLEEP_USECS,
+			     MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS);
+
+		if (time_after_eq(jiffies, jiffies_until_timeout)) {
+			dev_dbg(mc_io->dev,
+				"MC command timed out (portal: %pa, dprc handle: %#x, command: %#x)\n",
+				 &mc_io->portal_phys_addr,
+				 (unsigned int)mc_cmd_hdr_read_token(cmd),
+				 (unsigned int)mc_cmd_hdr_read_cmdid(cmd));
+
+			return -ETIMEDOUT;
+		}
+	}
+
+	*mc_status = status;
+	return 0;
+}
+
+/**
+ * Waits for the completion of an MC command doing atomic polling.
+ * udelay() is called between polling iterations.
+ *
+ * @mc_io: MC I/O object to be used
+ * @cmd: command buffer to receive MC response
+ * @mc_status: MC command completion status
+ */
+static int mc_polling_wait_atomic(struct fsl_mc_io *mc_io,
+				  struct fsl_mc_command *cmd,
+				  enum mc_cmd_status *mc_status)
+{
+	enum mc_cmd_status status;
+	unsigned long timeout_usecs = MC_CMD_COMPLETION_TIMEOUT_MS * 1000;
+
+	BUILD_BUG_ON((MC_CMD_COMPLETION_TIMEOUT_MS * 1000) %
+		     MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS != 0);
+
+	for (;;) {
+		status = mc_read_response(mc_io->portal_virt_addr, cmd);
+		if (status != MC_CMD_STATUS_READY)
+			break;
+
+		udelay(MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS);
+		timeout_usecs -= MC_CMD_COMPLETION_POLLING_MAX_SLEEP_USECS;
+		if (timeout_usecs == 0) {
+			dev_dbg(mc_io->dev,
+				"MC command timed out (portal: %pa, dprc handle: %#x, command: %#x)\n",
+				 &mc_io->portal_phys_addr,
+				 (unsigned int)mc_cmd_hdr_read_token(cmd),
+				 (unsigned int)mc_cmd_hdr_read_cmdid(cmd));
+
+			return -ETIMEDOUT;
+		}
+	}
+
+	*mc_status = status;
+	return 0;
+}
+
+/**
+ * Sends a command to the MC device using the given MC I/O object
+ *
+ * @mc_io: MC I/O object to be used
+ * @cmd: command to be sent
+ *
+ * Returns '0' on Success; Error code otherwise.
+ */
+int mc_send_command(struct fsl_mc_io *mc_io, struct fsl_mc_command *cmd)
+{
+	int error;
+	enum mc_cmd_status status;
+	unsigned long irq_flags = 0;
+
+	if (in_irq() && !(mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL))
+		return -EINVAL;
+
+	if (mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL)
+		spin_lock_irqsave(&mc_io->spinlock, irq_flags);
+	else
+		mutex_lock(&mc_io->mutex);
+
+	/*
+	 * Send command to the MC hardware:
+	 */
+	mc_write_command(mc_io->portal_virt_addr, cmd);
+
+	/*
+	 * Wait for response from the MC hardware:
+	 */
+	if (!(mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL))
+		error = mc_polling_wait_preemptible(mc_io, cmd, &status);
+	else
+		error = mc_polling_wait_atomic(mc_io, cmd, &status);
+
+	if (error < 0)
+		goto common_exit;
+
+	if (status != MC_CMD_STATUS_OK) {
+		dev_dbg(mc_io->dev,
+			"MC command failed: portal: %pa, dprc handle: %#x, command: %#x, status: %s (%#x)\n",
+			 &mc_io->portal_phys_addr,
+			 (unsigned int)mc_cmd_hdr_read_token(cmd),
+			 (unsigned int)mc_cmd_hdr_read_cmdid(cmd),
+			 mc_status_to_string(status),
+			 (unsigned int)status);
+
+		error = mc_status_to_error(status);
+		goto common_exit;
+	}
+
+	error = 0;
+common_exit:
+	if (mc_io->flags & FSL_MC_IO_ATOMIC_CONTEXT_PORTAL)
+		spin_unlock_irqrestore(&mc_io->spinlock, irq_flags);
+	else
+		mutex_unlock(&mc_io->mutex);
+
+	return error;
+}
+EXPORT_SYMBOL_GPL(mc_send_command);
diff --git a/drivers/bus/hisi_lpc.c b/drivers/bus/hisi_lpc.c
new file mode 100644
index 000000000..cbd970fb0
--- /dev/null
+++ b/drivers/bus/hisi_lpc.c
@@ -0,0 +1,708 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Hisilicon Limited, All Rights Reserved.
+ * Author: Zhichang Yuan <yuanzhichang@hisilicon.com>
+ * Author: Zou Rongrong <zourongrong@huawei.com>
+ * Author: John Garry <john.garry@huawei.com>
+ */
+
+#include <linux/acpi.h>
+#include <linux/console.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/logic_pio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/pci.h>
+#include <linux/serial_8250.h>
+#include <linux/slab.h>
+
+#define DRV_NAME "hisi-lpc"
+
+/*
+ * Setting this bit means each IO operation will target a different port
+ * address; 0 means repeated IO operations will use the same port,
+ * such as BT.
+ */
+#define FG_INCRADDR_LPC		0x02
+
+struct lpc_cycle_para {
+	unsigned int opflags;
+	unsigned int csize; /* data length of each operation */
+};
+
+struct hisi_lpc_dev {
+	spinlock_t cycle_lock;
+	void __iomem  *membase;
+	struct logic_pio_hwaddr *io_host;
+};
+
+/* The max IO cycle counts supported is four per operation at maximum */
+#define LPC_MAX_DWIDTH	4
+
+#define LPC_REG_STARTUP_SIGNAL		0x00
+#define LPC_REG_STARTUP_SIGNAL_START	BIT(0)
+#define LPC_REG_OP_STATUS		0x04
+#define LPC_REG_OP_STATUS_IDLE		BIT(0)
+#define LPC_REG_OP_STATUS_FINISHED	BIT(1)
+#define LPC_REG_OP_LEN			0x10 /* LPC cycles count per start */
+#define LPC_REG_CMD			0x14
+#define LPC_REG_CMD_OP			BIT(0) /* 0: read, 1: write */
+#define LPC_REG_CMD_SAMEADDR		BIT(3)
+#define LPC_REG_ADDR			0x20 /* target address */
+#define LPC_REG_WDATA			0x24 /* write FIFO */
+#define LPC_REG_RDATA			0x28 /* read FIFO */
+
+/* The minimal nanosecond interval for each query on LPC cycle status */
+#define LPC_NSEC_PERWAIT	100
+
+/*
+ * The maximum waiting time is about 128us.  It is specific for stream I/O,
+ * such as ins.
+ *
+ * The fastest IO cycle time is about 390ns, but the worst case will wait
+ * for extra 256 lpc clocks, so (256 + 13) * 30ns = 8 us. The maximum burst
+ * cycles is 16. So, the maximum waiting time is about 128us under worst
+ * case.
+ *
+ * Choose 1300 as the maximum.
+ */
+#define LPC_MAX_WAITCNT		1300
+
+/* About 10us. This is specific for single IO operations, such as inb */
+#define LPC_PEROP_WAITCNT	100
+
+static int wait_lpc_idle(unsigned char *mbase, unsigned int waitcnt)
+{
+	u32 status;
+
+	do {
+		status = readl(mbase + LPC_REG_OP_STATUS);
+		if (status & LPC_REG_OP_STATUS_IDLE)
+			return (status & LPC_REG_OP_STATUS_FINISHED) ? 0 : -EIO;
+		ndelay(LPC_NSEC_PERWAIT);
+	} while (--waitcnt);
+
+	return -ETIME;
+}
+
+/*
+ * hisi_lpc_target_in - trigger a series of LPC cycles for read operation
+ * @lpcdev: pointer to hisi lpc device
+ * @para: some parameters used to control the lpc I/O operations
+ * @addr: the lpc I/O target port address
+ * @buf: where the read back data is stored
+ * @opcnt: how many I/O operations required, i.e. data width
+ *
+ * Returns 0 on success, non-zero on fail.
+ */
+static int hisi_lpc_target_in(struct hisi_lpc_dev *lpcdev,
+			      struct lpc_cycle_para *para, unsigned long addr,
+			      unsigned char *buf, unsigned long opcnt)
+{
+	unsigned int cmd_word;
+	unsigned int waitcnt;
+	unsigned long flags;
+	int ret;
+
+	if (!buf || !opcnt || !para || !para->csize || !lpcdev)
+		return -EINVAL;
+
+	cmd_word = 0; /* IO mode, Read */
+	waitcnt = LPC_PEROP_WAITCNT;
+	if (!(para->opflags & FG_INCRADDR_LPC)) {
+		cmd_word |= LPC_REG_CMD_SAMEADDR;
+		waitcnt = LPC_MAX_WAITCNT;
+	}
+
+	/* whole operation must be atomic */
+	spin_lock_irqsave(&lpcdev->cycle_lock, flags);
+
+	writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
+	writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
+	writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
+
+	writel(LPC_REG_STARTUP_SIGNAL_START,
+	       lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
+
+	/* whether the operation is finished */
+	ret = wait_lpc_idle(lpcdev->membase, waitcnt);
+	if (ret) {
+		spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
+		return ret;
+	}
+
+	readsb(lpcdev->membase + LPC_REG_RDATA, buf, opcnt);
+
+	spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
+
+	return 0;
+}
+
+/*
+ * hisi_lpc_target_out - trigger a series of LPC cycles for write operation
+ * @lpcdev: pointer to hisi lpc device
+ * @para: some parameters used to control the lpc I/O operations
+ * @addr: the lpc I/O target port address
+ * @buf: where the data to be written is stored
+ * @opcnt: how many I/O operations required, i.e. data width
+ *
+ * Returns 0 on success, non-zero on fail.
+ */
+static int hisi_lpc_target_out(struct hisi_lpc_dev *lpcdev,
+			       struct lpc_cycle_para *para, unsigned long addr,
+			       const unsigned char *buf, unsigned long opcnt)
+{
+	unsigned int waitcnt;
+	unsigned long flags;
+	u32 cmd_word;
+	int ret;
+
+	if (!buf || !opcnt || !para || !lpcdev)
+		return -EINVAL;
+
+	/* default is increasing address */
+	cmd_word = LPC_REG_CMD_OP; /* IO mode, write */
+	waitcnt = LPC_PEROP_WAITCNT;
+	if (!(para->opflags & FG_INCRADDR_LPC)) {
+		cmd_word |= LPC_REG_CMD_SAMEADDR;
+		waitcnt = LPC_MAX_WAITCNT;
+	}
+
+	spin_lock_irqsave(&lpcdev->cycle_lock, flags);
+
+	writel_relaxed(opcnt, lpcdev->membase + LPC_REG_OP_LEN);
+	writel_relaxed(cmd_word, lpcdev->membase + LPC_REG_CMD);
+	writel_relaxed(addr, lpcdev->membase + LPC_REG_ADDR);
+
+	writesb(lpcdev->membase + LPC_REG_WDATA, buf, opcnt);
+
+	writel(LPC_REG_STARTUP_SIGNAL_START,
+	       lpcdev->membase + LPC_REG_STARTUP_SIGNAL);
+
+	/* whether the operation is finished */
+	ret = wait_lpc_idle(lpcdev->membase, waitcnt);
+
+	spin_unlock_irqrestore(&lpcdev->cycle_lock, flags);
+
+	return ret;
+}
+
+static unsigned long hisi_lpc_pio_to_addr(struct hisi_lpc_dev *lpcdev,
+					  unsigned long pio)
+{
+	return pio - lpcdev->io_host->io_start + lpcdev->io_host->hw_start;
+}
+
+/*
+ * hisi_lpc_comm_in - input the data in a single operation
+ * @hostdata: pointer to the device information relevant to LPC controller
+ * @pio: the target I/O port address
+ * @dwidth: the data length required to read from the target I/O port
+ *
+ * When success, data is returned. Otherwise, ~0 is returned.
+ */
+static u32 hisi_lpc_comm_in(void *hostdata, unsigned long pio, size_t dwidth)
+{
+	struct hisi_lpc_dev *lpcdev = hostdata;
+	struct lpc_cycle_para iopara;
+	unsigned long addr;
+	u32 rd_data = 0;
+	int ret;
+
+	if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
+		return ~0;
+
+	addr = hisi_lpc_pio_to_addr(lpcdev, pio);
+
+	iopara.opflags = FG_INCRADDR_LPC;
+	iopara.csize = dwidth;
+
+	ret = hisi_lpc_target_in(lpcdev, &iopara, addr,
+				 (unsigned char *)&rd_data, dwidth);
+	if (ret)
+		return ~0;
+
+	return le32_to_cpu(rd_data);
+}
+
+/*
+ * hisi_lpc_comm_out - output the data in a single operation
+ * @hostdata: pointer to the device information relevant to LPC controller
+ * @pio: the target I/O port address
+ * @val: a value to be output from caller, maximum is four bytes
+ * @dwidth: the data width required writing to the target I/O port
+ *
+ * This function corresponds to out(b,w,l) only.
+ */
+static void hisi_lpc_comm_out(void *hostdata, unsigned long pio,
+			      u32 val, size_t dwidth)
+{
+	struct hisi_lpc_dev *lpcdev = hostdata;
+	struct lpc_cycle_para iopara;
+	const unsigned char *buf;
+	unsigned long addr;
+
+	if (!lpcdev || !dwidth || dwidth > LPC_MAX_DWIDTH)
+		return;
+
+	val = cpu_to_le32(val);
+
+	buf = (const unsigned char *)&val;
+	addr = hisi_lpc_pio_to_addr(lpcdev, pio);
+
+	iopara.opflags = FG_INCRADDR_LPC;
+	iopara.csize = dwidth;
+
+	hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth);
+}
+
+/*
+ * hisi_lpc_comm_ins - input the data in the buffer in multiple operations
+ * @hostdata: pointer to the device information relevant to LPC controller
+ * @pio: the target I/O port address
+ * @buffer: a buffer where read/input data bytes are stored
+ * @dwidth: the data width required writing to the target I/O port
+ * @count: how many data units whose length is dwidth will be read
+ *
+ * When success, the data read back is stored in buffer pointed by buffer.
+ * Returns 0 on success, -errno otherwise.
+ */
+static u32 hisi_lpc_comm_ins(void *hostdata, unsigned long pio, void *buffer,
+			     size_t dwidth, unsigned int count)
+{
+	struct hisi_lpc_dev *lpcdev = hostdata;
+	unsigned char *buf = buffer;
+	struct lpc_cycle_para iopara;
+	unsigned long addr;
+
+	if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
+		return -EINVAL;
+
+	iopara.opflags = 0;
+	if (dwidth > 1)
+		iopara.opflags |= FG_INCRADDR_LPC;
+	iopara.csize = dwidth;
+
+	addr = hisi_lpc_pio_to_addr(lpcdev, pio);
+
+	do {
+		int ret;
+
+		ret = hisi_lpc_target_in(lpcdev, &iopara, addr, buf, dwidth);
+		if (ret)
+			return ret;
+		buf += dwidth;
+	} while (--count);
+
+	return 0;
+}
+
+/*
+ * hisi_lpc_comm_outs - output the data in the buffer in multiple operations
+ * @hostdata: pointer to the device information relevant to LPC controller
+ * @pio: the target I/O port address
+ * @buffer: a buffer where write/output data bytes are stored
+ * @dwidth: the data width required writing to the target I/O port
+ * @count: how many data units whose length is dwidth will be written
+ */
+static void hisi_lpc_comm_outs(void *hostdata, unsigned long pio,
+			       const void *buffer, size_t dwidth,
+			       unsigned int count)
+{
+	struct hisi_lpc_dev *lpcdev = hostdata;
+	struct lpc_cycle_para iopara;
+	const unsigned char *buf = buffer;
+	unsigned long addr;
+
+	if (!lpcdev || !buf || !count || !dwidth || dwidth > LPC_MAX_DWIDTH)
+		return;
+
+	iopara.opflags = 0;
+	if (dwidth > 1)
+		iopara.opflags |= FG_INCRADDR_LPC;
+	iopara.csize = dwidth;
+
+	addr = hisi_lpc_pio_to_addr(lpcdev, pio);
+	do {
+		if (hisi_lpc_target_out(lpcdev, &iopara, addr, buf, dwidth))
+			break;
+		buf += dwidth;
+	} while (--count);
+}
+
+static const struct logic_pio_host_ops hisi_lpc_ops = {
+	.in = hisi_lpc_comm_in,
+	.out = hisi_lpc_comm_out,
+	.ins = hisi_lpc_comm_ins,
+	.outs = hisi_lpc_comm_outs,
+};
+
+#ifdef CONFIG_ACPI
+static int hisi_lpc_acpi_xlat_io_res(struct acpi_device *adev,
+				     struct acpi_device *host,
+				     struct resource *res)
+{
+	unsigned long sys_port;
+	resource_size_t len = resource_size(res);
+
+	sys_port = logic_pio_trans_hwaddr(&host->fwnode, res->start, len);
+	if (sys_port == ~0UL)
+		return -EFAULT;
+
+	res->start = sys_port;
+	res->end = sys_port + len;
+
+	return 0;
+}
+
+/*
+ * Released firmware describes the IO port max address as 0x3fff, which is
+ * the max host bus address. Fixup to a proper range. This will probably
+ * never be fixed in firmware.
+ */
+static void hisi_lpc_acpi_fixup_child_resource(struct device *hostdev,
+					       struct resource *r)
+{
+	if (r->end != 0x3fff)
+		return;
+
+	if (r->start == 0xe4)
+		r->end = 0xe4 + 0x04 - 1;
+	else if (r->start == 0x2f8)
+		r->end = 0x2f8 + 0x08 - 1;
+	else
+		dev_warn(hostdev, "unrecognised resource %pR to fixup, ignoring\n",
+			 r);
+}
+
+/*
+ * hisi_lpc_acpi_set_io_res - set the resources for a child
+ * @child: the device node to be updated the I/O resource
+ * @hostdev: the device node associated with host controller
+ * @res: double pointer to be set to the address of translated resources
+ * @num_res: pointer to variable to hold the number of translated resources
+ *
+ * Returns 0 when successful, and a negative value for failure.
+ *
+ * For a given host controller, each child device will have an associated
+ * host-relative address resource.  This function will return the translated
+ * logical PIO addresses for each child devices resources.
+ */
+static int hisi_lpc_acpi_set_io_res(struct device *child,
+				    struct device *hostdev,
+				    const struct resource **res, int *num_res)
+{
+	struct acpi_device *adev;
+	struct acpi_device *host;
+	struct resource_entry *rentry;
+	LIST_HEAD(resource_list);
+	struct resource *resources;
+	int count;
+	int i;
+
+	if (!child || !hostdev)
+		return -EINVAL;
+
+	host = to_acpi_device(hostdev);
+	adev = to_acpi_device(child);
+
+	if (!adev->status.present) {
+		dev_dbg(child, "device is not present\n");
+		return -EIO;
+	}
+
+	if (acpi_device_enumerated(adev)) {
+		dev_dbg(child, "has been enumerated\n");
+		return -EIO;
+	}
+
+	/*
+	 * The following code segment to retrieve the resources is common to
+	 * acpi_create_platform_device(), so consider a common helper function
+	 * in future.
+	 */
+	count = acpi_dev_get_resources(adev, &resource_list, NULL, NULL);
+	if (count <= 0) {
+		dev_dbg(child, "failed to get resources\n");
+		return count ? count : -EIO;
+	}
+
+	resources = devm_kcalloc(hostdev, count, sizeof(*resources),
+				 GFP_KERNEL);
+	if (!resources) {
+		dev_warn(hostdev, "could not allocate memory for %d resources\n",
+			 count);
+		acpi_dev_free_resource_list(&resource_list);
+		return -ENOMEM;
+	}
+	count = 0;
+	list_for_each_entry(rentry, &resource_list, node) {
+		resources[count] = *rentry->res;
+		hisi_lpc_acpi_fixup_child_resource(hostdev, &resources[count]);
+		count++;
+	}
+
+	acpi_dev_free_resource_list(&resource_list);
+
+	/* translate the I/O resources */
+	for (i = 0; i < count; i++) {
+		int ret;
+
+		if (!(resources[i].flags & IORESOURCE_IO))
+			continue;
+		ret = hisi_lpc_acpi_xlat_io_res(adev, host, &resources[i]);
+		if (ret) {
+			dev_err(child, "translate IO range %pR failed (%d)\n",
+				&resources[i], ret);
+			return ret;
+		}
+	}
+	*res = resources;
+	*num_res = count;
+
+	return 0;
+}
+
+static int hisi_lpc_acpi_remove_subdev(struct device *dev, void *unused)
+{
+	platform_device_unregister(to_platform_device(dev));
+	return 0;
+}
+
+struct hisi_lpc_acpi_cell {
+	const char *hid;
+	const char *name;
+	void *pdata;
+	size_t pdata_size;
+};
+
+static void hisi_lpc_acpi_remove(struct device *hostdev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(hostdev);
+	struct acpi_device *child;
+
+	device_for_each_child(hostdev, NULL, hisi_lpc_acpi_remove_subdev);
+
+	list_for_each_entry(child, &adev->children, node)
+		acpi_device_clear_enumerated(child);
+}
+
+/*
+ * hisi_lpc_acpi_probe - probe children for ACPI FW
+ * @hostdev: LPC host device pointer
+ *
+ * Returns 0 when successful, and a negative value for failure.
+ *
+ * Create a platform device per child, fixing up the resources
+ * from bus addresses to Logical PIO addresses.
+ *
+ */
+static int hisi_lpc_acpi_probe(struct device *hostdev)
+{
+	struct acpi_device *adev = ACPI_COMPANION(hostdev);
+	struct acpi_device *child;
+	int ret;
+
+	/* Only consider the children of the host */
+	list_for_each_entry(child, &adev->children, node) {
+		const char *hid = acpi_device_hid(child);
+		const struct hisi_lpc_acpi_cell *cell;
+		struct platform_device *pdev;
+		const struct resource *res;
+		bool found = false;
+		int num_res;
+
+		ret = hisi_lpc_acpi_set_io_res(&child->dev, &adev->dev, &res,
+					       &num_res);
+		if (ret) {
+			dev_warn(hostdev, "set resource fail (%d)\n", ret);
+			goto fail;
+		}
+
+		cell = (struct hisi_lpc_acpi_cell []){
+			/* ipmi */
+			{
+				.hid = "IPI0001",
+				.name = "hisi-lpc-ipmi",
+			},
+			/* 8250-compatible uart */
+			{
+				.hid = "HISI1031",
+				.name = "serial8250",
+				.pdata = (struct plat_serial8250_port []) {
+					{
+						.iobase = res->start,
+						.uartclk = 1843200,
+						.iotype = UPIO_PORT,
+						.flags = UPF_BOOT_AUTOCONF,
+					},
+					{}
+				},
+				.pdata_size = 2 *
+					sizeof(struct plat_serial8250_port),
+			},
+			{}
+		};
+
+		for (; cell && cell->name; cell++) {
+			if (!strcmp(cell->hid, hid)) {
+				found = true;
+				break;
+			}
+		}
+
+		if (!found) {
+			dev_warn(hostdev,
+				 "could not find cell for child device (%s)\n",
+				 hid);
+			ret = -ENODEV;
+			goto fail;
+		}
+
+		pdev = platform_device_alloc(cell->name, PLATFORM_DEVID_AUTO);
+		if (!pdev) {
+			ret = -ENOMEM;
+			goto fail;
+		}
+
+		pdev->dev.parent = hostdev;
+		ACPI_COMPANION_SET(&pdev->dev, child);
+
+		ret = platform_device_add_resources(pdev, res, num_res);
+		if (ret)
+			goto fail;
+
+		ret = platform_device_add_data(pdev, cell->pdata,
+					       cell->pdata_size);
+		if (ret)
+			goto fail;
+
+		ret = platform_device_add(pdev);
+		if (ret)
+			goto fail;
+
+		acpi_device_set_enumerated(child);
+	}
+
+	return 0;
+
+fail:
+	hisi_lpc_acpi_remove(hostdev);
+	return ret;
+}
+
+static const struct acpi_device_id hisi_lpc_acpi_match[] = {
+	{"HISI0191"},
+	{}
+};
+#else
+static int hisi_lpc_acpi_probe(struct device *dev)
+{
+	return -ENODEV;
+}
+
+static void hisi_lpc_acpi_remove(struct device *hostdev)
+{
+}
+#endif // CONFIG_ACPI
+
+/*
+ * hisi_lpc_probe - the probe callback function for hisi lpc host,
+ *		   will finish all the initialization.
+ * @pdev: the platform device corresponding to hisi lpc host
+ *
+ * Returns 0 on success, non-zero on fail.
+ */
+static int hisi_lpc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct acpi_device *acpi_device = ACPI_COMPANION(dev);
+	struct logic_pio_hwaddr *range;
+	struct hisi_lpc_dev *lpcdev;
+	resource_size_t io_end;
+	struct resource *res;
+	int ret;
+
+	lpcdev = devm_kzalloc(dev, sizeof(*lpcdev), GFP_KERNEL);
+	if (!lpcdev)
+		return -ENOMEM;
+
+	spin_lock_init(&lpcdev->cycle_lock);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	lpcdev->membase = devm_ioremap_resource(dev, res);
+	if (IS_ERR(lpcdev->membase))
+		return PTR_ERR(lpcdev->membase);
+
+	range = devm_kzalloc(dev, sizeof(*range), GFP_KERNEL);
+	if (!range)
+		return -ENOMEM;
+
+	range->fwnode = dev->fwnode;
+	range->flags = LOGIC_PIO_INDIRECT;
+	range->size = PIO_INDIRECT_SIZE;
+	range->hostdata = lpcdev;
+	range->ops = &hisi_lpc_ops;
+	lpcdev->io_host = range;
+
+	ret = logic_pio_register_range(range);
+	if (ret) {
+		dev_err(dev, "register IO range failed (%d)!\n", ret);
+		return ret;
+	}
+
+	/* register the LPC host PIO resources */
+	if (acpi_device)
+		ret = hisi_lpc_acpi_probe(dev);
+	else
+		ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
+	if (ret) {
+		logic_pio_unregister_range(range);
+		return ret;
+	}
+
+	dev_set_drvdata(dev, lpcdev);
+
+	io_end = lpcdev->io_host->io_start + lpcdev->io_host->size;
+	dev_info(dev, "registered range [%pa - %pa]\n",
+		 &lpcdev->io_host->io_start, &io_end);
+
+	return ret;
+}
+
+static int hisi_lpc_remove(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct acpi_device *acpi_device = ACPI_COMPANION(dev);
+	struct hisi_lpc_dev *lpcdev = dev_get_drvdata(dev);
+	struct logic_pio_hwaddr *range = lpcdev->io_host;
+
+	if (acpi_device)
+		hisi_lpc_acpi_remove(dev);
+	else
+		of_platform_depopulate(dev);
+
+	logic_pio_unregister_range(range);
+
+	return 0;
+}
+
+static const struct of_device_id hisi_lpc_of_match[] = {
+	{ .compatible = "hisilicon,hip06-lpc", },
+	{ .compatible = "hisilicon,hip07-lpc", },
+	{}
+};
+
+static struct platform_driver hisi_lpc_driver = {
+	.driver = {
+		.name           = DRV_NAME,
+		.of_match_table = hisi_lpc_of_match,
+		.acpi_match_table = ACPI_PTR(hisi_lpc_acpi_match),
+	},
+	.probe = hisi_lpc_probe,
+	.remove = hisi_lpc_remove,
+};
+builtin_platform_driver(hisi_lpc_driver);
diff --git a/drivers/bus/imx-weim.c b/drivers/bus/imx-weim.c
new file mode 100644
index 000000000..6a94aa6a2
--- /dev/null
+++ b/drivers/bus/imx-weim.c
@@ -0,0 +1,221 @@
+/*
+ * EIM driver for Freescale's i.MX chips
+ *
+ * Copyright (C) 2013 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/of_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
+#include <linux/regmap.h>
+
+struct imx_weim_devtype {
+	unsigned int	cs_count;
+	unsigned int	cs_regs_count;
+	unsigned int	cs_stride;
+};
+
+static const struct imx_weim_devtype imx1_weim_devtype = {
+	.cs_count	= 6,
+	.cs_regs_count	= 2,
+	.cs_stride	= 0x08,
+};
+
+static const struct imx_weim_devtype imx27_weim_devtype = {
+	.cs_count	= 6,
+	.cs_regs_count	= 3,
+	.cs_stride	= 0x10,
+};
+
+static const struct imx_weim_devtype imx50_weim_devtype = {
+	.cs_count	= 4,
+	.cs_regs_count	= 6,
+	.cs_stride	= 0x18,
+};
+
+static const struct imx_weim_devtype imx51_weim_devtype = {
+	.cs_count	= 6,
+	.cs_regs_count	= 6,
+	.cs_stride	= 0x18,
+};
+
+#define MAX_CS_REGS_COUNT	6
+
+static const struct of_device_id weim_id_table[] = {
+	/* i.MX1/21 */
+	{ .compatible = "fsl,imx1-weim", .data = &imx1_weim_devtype, },
+	/* i.MX25/27/31/35 */
+	{ .compatible = "fsl,imx27-weim", .data = &imx27_weim_devtype, },
+	/* i.MX50/53/6Q */
+	{ .compatible = "fsl,imx50-weim", .data = &imx50_weim_devtype, },
+	{ .compatible = "fsl,imx6q-weim", .data = &imx50_weim_devtype, },
+	/* i.MX51 */
+	{ .compatible = "fsl,imx51-weim", .data = &imx51_weim_devtype, },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, weim_id_table);
+
+static int __init imx_weim_gpr_setup(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct property *prop;
+	const __be32 *p;
+	struct regmap *gpr;
+	u32 gprvals[4] = {
+		05,	/* CS0(128M) CS1(0M)  CS2(0M)  CS3(0M)  */
+		033,	/* CS0(64M)  CS1(64M) CS2(0M)  CS3(0M)  */
+		0113,	/* CS0(64M)  CS1(32M) CS2(32M) CS3(0M)  */
+		01111,	/* CS0(32M)  CS1(32M) CS2(32M) CS3(32M) */
+	};
+	u32 gprval = 0;
+	u32 val;
+	int cs = 0;
+	int i = 0;
+
+	gpr = syscon_regmap_lookup_by_phandle(np, "fsl,weim-cs-gpr");
+	if (IS_ERR(gpr)) {
+		dev_dbg(&pdev->dev, "failed to find weim-cs-gpr\n");
+		return 0;
+	}
+
+	of_property_for_each_u32(np, "ranges", prop, p, val) {
+		if (i % 4 == 0) {
+			cs = val;
+		} else if (i % 4 == 3 && val) {
+			val = (val / SZ_32M) | 1;
+			gprval |= val << cs * 3;
+		}
+		i++;
+	}
+
+	if (i == 0 || i % 4)
+		goto err;
+
+	for (i = 0; i < ARRAY_SIZE(gprvals); i++) {
+		if (gprval == gprvals[i]) {
+			/* Found it. Set up IOMUXC_GPR1[11:0] with it. */
+			regmap_update_bits(gpr, IOMUXC_GPR1, 0xfff, gprval);
+			return 0;
+		}
+	}
+
+err:
+	dev_err(&pdev->dev, "Invalid 'ranges' configuration\n");
+	return -EINVAL;
+}
+
+/* Parse and set the timing for this device. */
+static int __init weim_timing_setup(struct device_node *np, void __iomem *base,
+				    const struct imx_weim_devtype *devtype)
+{
+	u32 cs_idx, value[MAX_CS_REGS_COUNT];
+	int i, ret;
+
+	if (WARN_ON(devtype->cs_regs_count > MAX_CS_REGS_COUNT))
+		return -EINVAL;
+
+	/* get the CS index from this child node's "reg" property. */
+	ret = of_property_read_u32(np, "reg", &cs_idx);
+	if (ret)
+		return ret;
+
+	if (cs_idx >= devtype->cs_count)
+		return -EINVAL;
+
+	ret = of_property_read_u32_array(np, "fsl,weim-cs-timing",
+					 value, devtype->cs_regs_count);
+	if (ret)
+		return ret;
+
+	/* set the timing for WEIM */
+	for (i = 0; i < devtype->cs_regs_count; i++)
+		writel(value[i], base + cs_idx * devtype->cs_stride + i * 4);
+
+	return 0;
+}
+
+static int __init weim_parse_dt(struct platform_device *pdev,
+				void __iomem *base)
+{
+	const struct of_device_id *of_id = of_match_device(weim_id_table,
+							   &pdev->dev);
+	const struct imx_weim_devtype *devtype = of_id->data;
+	struct device_node *child;
+	int ret, have_child = 0;
+
+	if (devtype == &imx50_weim_devtype) {
+		ret = imx_weim_gpr_setup(pdev);
+		if (ret)
+			return ret;
+	}
+
+	for_each_available_child_of_node(pdev->dev.of_node, child) {
+		if (!child->name)
+			continue;
+
+		ret = weim_timing_setup(child, base, devtype);
+		if (ret)
+			dev_warn(&pdev->dev, "%pOF set timing failed.\n",
+				child);
+		else
+			have_child = 1;
+	}
+
+	if (have_child)
+		ret = of_platform_default_populate(pdev->dev.of_node,
+						   NULL, &pdev->dev);
+	if (ret)
+		dev_err(&pdev->dev, "%pOF fail to create devices.\n",
+			pdev->dev.of_node);
+	return ret;
+}
+
+static int __init weim_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct clk *clk;
+	void __iomem *base;
+	int ret;
+
+	/* get the resource */
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	/* get the clock */
+	clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk))
+		return PTR_ERR(clk);
+
+	ret = clk_prepare_enable(clk);
+	if (ret)
+		return ret;
+
+	/* parse the device node */
+	ret = weim_parse_dt(pdev, base);
+	if (ret)
+		clk_disable_unprepare(clk);
+	else
+		dev_info(&pdev->dev, "Driver registered.\n");
+
+	return ret;
+}
+
+static struct platform_driver weim_driver = {
+	.driver = {
+		.name		= "imx-weim",
+		.of_match_table	= weim_id_table,
+	},
+};
+module_platform_driver_probe(weim_driver, weim_probe);
+
+MODULE_AUTHOR("Freescale Semiconductor Inc.");
+MODULE_DESCRIPTION("i.MX EIM Controller Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/bus/mips_cdmm.c b/drivers/bus/mips_cdmm.c
new file mode 100644
index 000000000..7c1da45be
--- /dev/null
+++ b/drivers/bus/mips_cdmm.c
@@ -0,0 +1,682 @@
+/*
+ * Bus driver for MIPS Common Device Memory Map (CDMM).
+ *
+ * Copyright (C) 2014-2015 Imagination Technologies Ltd.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/atomic.h>
+#include <linux/err.h>
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/smp.h>
+#include <asm/cdmm.h>
+#include <asm/hazards.h>
+#include <asm/mipsregs.h>
+
+/* Access control and status register fields */
+#define CDMM_ACSR_DEVTYPE_SHIFT	24
+#define CDMM_ACSR_DEVTYPE	(255ul << CDMM_ACSR_DEVTYPE_SHIFT)
+#define CDMM_ACSR_DEVSIZE_SHIFT	16
+#define CDMM_ACSR_DEVSIZE	(31ul << CDMM_ACSR_DEVSIZE_SHIFT)
+#define CDMM_ACSR_DEVREV_SHIFT	12
+#define CDMM_ACSR_DEVREV	(15ul << CDMM_ACSR_DEVREV_SHIFT)
+#define CDMM_ACSR_UW		(1ul << 3)
+#define CDMM_ACSR_UR		(1ul << 2)
+#define CDMM_ACSR_SW		(1ul << 1)
+#define CDMM_ACSR_SR		(1ul << 0)
+
+/* Each block of device registers is 64 bytes */
+#define CDMM_DRB_SIZE		64
+
+#define to_mips_cdmm_driver(d)	container_of(d, struct mips_cdmm_driver, drv)
+
+/* Default physical base address */
+static phys_addr_t mips_cdmm_default_base;
+
+/* Bus operations */
+
+static const struct mips_cdmm_device_id *
+mips_cdmm_lookup(const struct mips_cdmm_device_id *table,
+		 struct mips_cdmm_device *dev)
+{
+	int ret = 0;
+
+	for (; table->type; ++table) {
+		ret = (dev->type == table->type);
+		if (ret)
+			break;
+	}
+
+	return ret ? table : NULL;
+}
+
+static int mips_cdmm_match(struct device *dev, struct device_driver *drv)
+{
+	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);
+	struct mips_cdmm_driver *cdrv = to_mips_cdmm_driver(drv);
+
+	return mips_cdmm_lookup(cdrv->id_table, cdev) != NULL;
+}
+
+static int mips_cdmm_uevent(struct device *dev, struct kobj_uevent_env *env)
+{
+	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);
+	int retval = 0;
+
+	retval = add_uevent_var(env, "CDMM_CPU=%u", cdev->cpu);
+	if (retval)
+		return retval;
+
+	retval = add_uevent_var(env, "CDMM_TYPE=0x%02x", cdev->type);
+	if (retval)
+		return retval;
+
+	retval = add_uevent_var(env, "CDMM_REV=%u", cdev->rev);
+	if (retval)
+		return retval;
+
+	retval = add_uevent_var(env, "MODALIAS=mipscdmm:t%02X", cdev->type);
+	return retval;
+}
+
+/* Device attributes */
+
+#define CDMM_ATTR(name, fmt, arg...)					\
+static ssize_t name##_show(struct device *_dev,				\
+			   struct device_attribute *attr, char *buf)	\
+{									\
+	struct mips_cdmm_device *dev = to_mips_cdmm_device(_dev);	\
+	return sprintf(buf, fmt, arg);					\
+}									\
+static DEVICE_ATTR_RO(name);
+
+CDMM_ATTR(cpu, "%u\n", dev->cpu);
+CDMM_ATTR(type, "0x%02x\n", dev->type);
+CDMM_ATTR(revision, "%u\n", dev->rev);
+CDMM_ATTR(modalias, "mipscdmm:t%02X\n", dev->type);
+CDMM_ATTR(resource, "\t%016llx\t%016llx\t%016lx\n",
+	  (unsigned long long)dev->res.start,
+	  (unsigned long long)dev->res.end,
+	  dev->res.flags);
+
+static struct attribute *mips_cdmm_dev_attrs[] = {
+	&dev_attr_cpu.attr,
+	&dev_attr_type.attr,
+	&dev_attr_revision.attr,
+	&dev_attr_modalias.attr,
+	&dev_attr_resource.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(mips_cdmm_dev);
+
+struct bus_type mips_cdmm_bustype = {
+	.name		= "cdmm",
+	.dev_groups	= mips_cdmm_dev_groups,
+	.match		= mips_cdmm_match,
+	.uevent		= mips_cdmm_uevent,
+};
+EXPORT_SYMBOL_GPL(mips_cdmm_bustype);
+
+/*
+ * Standard driver callback helpers.
+ *
+ * All the CDMM driver callbacks need to be executed on the appropriate CPU from
+ * workqueues. For the standard driver callbacks we need a work function
+ * (mips_cdmm_{void,int}_work()) to do the actual call from the right CPU, and a
+ * wrapper function (generated with BUILD_PERCPU_HELPER) to arrange for the work
+ * function to be called on that CPU.
+ */
+
+/**
+ * struct mips_cdmm_work_dev - Data for per-device call work.
+ * @fn:		CDMM driver callback function to call for the device.
+ * @dev:	CDMM device to pass to @fn.
+ */
+struct mips_cdmm_work_dev {
+	void			*fn;
+	struct mips_cdmm_device *dev;
+};
+
+/**
+ * mips_cdmm_void_work() - Call a void returning CDMM driver callback.
+ * @data:	struct mips_cdmm_work_dev pointer.
+ *
+ * A work_on_cpu() callback function to call an arbitrary CDMM driver callback
+ * function which doesn't return a value.
+ */
+static long mips_cdmm_void_work(void *data)
+{
+	struct mips_cdmm_work_dev *work = data;
+	void (*fn)(struct mips_cdmm_device *) = work->fn;
+
+	fn(work->dev);
+	return 0;
+}
+
+/**
+ * mips_cdmm_int_work() - Call an int returning CDMM driver callback.
+ * @data:	struct mips_cdmm_work_dev pointer.
+ *
+ * A work_on_cpu() callback function to call an arbitrary CDMM driver callback
+ * function which returns an int.
+ */
+static long mips_cdmm_int_work(void *data)
+{
+	struct mips_cdmm_work_dev *work = data;
+	int (*fn)(struct mips_cdmm_device *) = work->fn;
+
+	return fn(work->dev);
+}
+
+#define _BUILD_RET_void
+#define _BUILD_RET_int	return
+
+/**
+ * BUILD_PERCPU_HELPER() - Helper to call a CDMM driver callback on right CPU.
+ * @_ret:	Return type (void or int).
+ * @_name:	Name of CDMM driver callback function.
+ *
+ * Generates a specific device callback function to call a CDMM driver callback
+ * function on the appropriate CPU for the device, and if applicable return the
+ * result.
+ */
+#define BUILD_PERCPU_HELPER(_ret, _name)				\
+static _ret mips_cdmm_##_name(struct device *dev)			\
+{									\
+	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);	\
+	struct mips_cdmm_driver *cdrv = to_mips_cdmm_driver(dev->driver); \
+	struct mips_cdmm_work_dev work = {				\
+		.fn	= cdrv->_name,					\
+		.dev	= cdev,						\
+	};								\
+									\
+	_BUILD_RET_##_ret work_on_cpu(cdev->cpu,			\
+				      mips_cdmm_##_ret##_work, &work);	\
+}
+
+/* Driver callback functions */
+BUILD_PERCPU_HELPER(int, probe)     /* int mips_cdmm_probe(struct device) */
+BUILD_PERCPU_HELPER(int, remove)    /* int mips_cdmm_remove(struct device) */
+BUILD_PERCPU_HELPER(void, shutdown) /* void mips_cdmm_shutdown(struct device) */
+
+
+/* Driver registration */
+
+/**
+ * mips_cdmm_driver_register() - Register a CDMM driver.
+ * @drv:	CDMM driver information.
+ *
+ * Register a CDMM driver with the CDMM subsystem. The driver will be informed
+ * of matching devices which are discovered.
+ *
+ * Returns:	0 on success.
+ */
+int mips_cdmm_driver_register(struct mips_cdmm_driver *drv)
+{
+	drv->drv.bus = &mips_cdmm_bustype;
+
+	if (drv->probe)
+		drv->drv.probe = mips_cdmm_probe;
+	if (drv->remove)
+		drv->drv.remove = mips_cdmm_remove;
+	if (drv->shutdown)
+		drv->drv.shutdown = mips_cdmm_shutdown;
+
+	return driver_register(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(mips_cdmm_driver_register);
+
+/**
+ * mips_cdmm_driver_unregister() - Unregister a CDMM driver.
+ * @drv:	CDMM driver information.
+ *
+ * Unregister a CDMM driver from the CDMM subsystem.
+ */
+void mips_cdmm_driver_unregister(struct mips_cdmm_driver *drv)
+{
+	driver_unregister(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(mips_cdmm_driver_unregister);
+
+
+/* CDMM initialisation and bus discovery */
+
+/**
+ * struct mips_cdmm_bus - Info about CDMM bus.
+ * @phys:		Physical address at which it is mapped.
+ * @regs:		Virtual address where registers can be accessed.
+ * @drbs:		Total number of DRBs.
+ * @drbs_reserved:	Number of DRBs reserved.
+ * @discovered:		Whether the devices on the bus have been discovered yet.
+ * @offline:		Whether the CDMM bus is going offline (or very early
+ *			coming back online), in which case it should be
+ *			reconfigured each time.
+ */
+struct mips_cdmm_bus {
+	phys_addr_t	 phys;
+	void __iomem	*regs;
+	unsigned int	 drbs;
+	unsigned int	 drbs_reserved;
+	bool		 discovered;
+	bool		 offline;
+};
+
+static struct mips_cdmm_bus mips_cdmm_boot_bus;
+static DEFINE_PER_CPU(struct mips_cdmm_bus *, mips_cdmm_buses);
+static atomic_t mips_cdmm_next_id = ATOMIC_INIT(-1);
+
+/**
+ * mips_cdmm_get_bus() - Get the per-CPU CDMM bus information.
+ *
+ * Get information about the per-CPU CDMM bus, if the bus is present.
+ *
+ * The caller must prevent migration to another CPU, either by disabling
+ * pre-emption or by running from a pinned kernel thread.
+ *
+ * Returns:	Pointer to CDMM bus information for the current CPU.
+ *		May return ERR_PTR(-errno) in case of error, so check with
+ *		IS_ERR().
+ */
+static struct mips_cdmm_bus *mips_cdmm_get_bus(void)
+{
+	struct mips_cdmm_bus *bus, **bus_p;
+	unsigned long flags;
+	unsigned int cpu;
+
+	if (!cpu_has_cdmm)
+		return ERR_PTR(-ENODEV);
+
+	cpu = smp_processor_id();
+	/* Avoid early use of per-cpu primitives before initialised */
+	if (cpu == 0)
+		return &mips_cdmm_boot_bus;
+
+	/* Get bus pointer */
+	bus_p = per_cpu_ptr(&mips_cdmm_buses, cpu);
+	local_irq_save(flags);
+	bus = *bus_p;
+	/* Attempt allocation if NULL */
+	if (unlikely(!bus)) {
+		bus = kzalloc(sizeof(*bus), GFP_ATOMIC);
+		if (unlikely(!bus))
+			bus = ERR_PTR(-ENOMEM);
+		else
+			*bus_p = bus;
+	}
+	local_irq_restore(flags);
+	return bus;
+}
+
+/**
+ * mips_cdmm_cur_base() - Find current physical base address of CDMM region.
+ *
+ * Returns:	Physical base address of CDMM region according to cdmmbase CP0
+ *		register, or 0 if the CDMM region is disabled.
+ */
+static phys_addr_t mips_cdmm_cur_base(void)
+{
+	unsigned long cdmmbase = read_c0_cdmmbase();
+
+	if (!(cdmmbase & MIPS_CDMMBASE_EN))
+		return 0;
+
+	return (cdmmbase >> MIPS_CDMMBASE_ADDR_SHIFT)
+		<< MIPS_CDMMBASE_ADDR_START;
+}
+
+/**
+ * mips_cdmm_phys_base() - Choose a physical base address for CDMM region.
+ *
+ * Picking a suitable physical address at which to map the CDMM region is
+ * platform specific, so this weak function can be overridden by platform
+ * code to pick a suitable value if none is configured by the bootloader.
+ */
+phys_addr_t __weak mips_cdmm_phys_base(void)
+{
+	return 0;
+}
+
+/**
+ * mips_cdmm_setup() - Ensure the CDMM bus is initialised and usable.
+ * @bus:	Pointer to bus information for current CPU.
+ *		IS_ERR(bus) is checked, so no need for caller to check.
+ *
+ * The caller must prevent migration to another CPU, either by disabling
+ * pre-emption or by running from a pinned kernel thread.
+ *
+ * Returns	0 on success, -errno on failure.
+ */
+static int mips_cdmm_setup(struct mips_cdmm_bus *bus)
+{
+	unsigned long cdmmbase, flags;
+	int ret = 0;
+
+	if (IS_ERR(bus))
+		return PTR_ERR(bus);
+
+	local_irq_save(flags);
+	/* Don't set up bus a second time unless marked offline */
+	if (bus->offline) {
+		/* If CDMM region is still set up, nothing to do */
+		if (bus->phys == mips_cdmm_cur_base())
+			goto out;
+		/*
+		 * The CDMM region isn't set up as expected, so it needs
+		 * reconfiguring, but then we can stop checking it.
+		 */
+		bus->offline = false;
+	} else if (bus->phys > 1) {
+		goto out;
+	}
+
+	/* If the CDMM region is already configured, inherit that setup */
+	if (!bus->phys)
+		bus->phys = mips_cdmm_cur_base();
+	/* Otherwise, ask platform code for suggestions */
+	if (!bus->phys)
+		bus->phys = mips_cdmm_phys_base();
+	/* Otherwise, copy what other CPUs have done */
+	if (!bus->phys)
+		bus->phys = mips_cdmm_default_base;
+	/* Otherwise, complain once */
+	if (!bus->phys) {
+		bus->phys = 1;
+		/*
+		 * If you hit this, either your bootloader needs to set up the
+		 * CDMM on the boot CPU, or else you need to implement
+		 * mips_cdmm_phys_base() for your platform (see asm/cdmm.h).
+		 */
+		pr_err("cdmm%u: Failed to choose a physical base\n",
+		       smp_processor_id());
+	}
+	/* Already complained? */
+	if (bus->phys == 1) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	/* Record our success for other CPUs to copy */
+	mips_cdmm_default_base = bus->phys;
+
+	pr_debug("cdmm%u: Enabling CDMM region at %pa\n",
+		 smp_processor_id(), &bus->phys);
+
+	/* Enable CDMM */
+	cdmmbase = read_c0_cdmmbase();
+	cdmmbase &= (1ul << MIPS_CDMMBASE_ADDR_SHIFT) - 1;
+	cdmmbase |= (bus->phys >> MIPS_CDMMBASE_ADDR_START)
+			<< MIPS_CDMMBASE_ADDR_SHIFT;
+	cdmmbase |= MIPS_CDMMBASE_EN;
+	write_c0_cdmmbase(cdmmbase);
+	tlbw_use_hazard();
+
+	bus->regs = (void __iomem *)CKSEG1ADDR(bus->phys);
+	bus->drbs = 1 + ((cdmmbase & MIPS_CDMMBASE_SIZE) >>
+			 MIPS_CDMMBASE_SIZE_SHIFT);
+	bus->drbs_reserved = !!(cdmmbase & MIPS_CDMMBASE_CI);
+
+out:
+	local_irq_restore(flags);
+	return ret;
+}
+
+/**
+ * mips_cdmm_early_probe() - Minimally probe for a specific device on CDMM.
+ * @dev_type:	CDMM type code to look for.
+ *
+ * Minimally configure the in-CPU Common Device Memory Map (CDMM) and look for a
+ * specific device. This can be used to find a device very early in boot for
+ * example to configure an early FDC console device.
+ *
+ * The caller must prevent migration to another CPU, either by disabling
+ * pre-emption or by running from a pinned kernel thread.
+ *
+ * Returns:	MMIO pointer to device memory. The caller can read the ACSR
+ *		register to find more information about the device (such as the
+ *		version number or the number of blocks).
+ *		May return IOMEM_ERR_PTR(-errno) in case of error, so check with
+ *		IS_ERR().
+ */
+void __iomem *mips_cdmm_early_probe(unsigned int dev_type)
+{
+	struct mips_cdmm_bus *bus;
+	void __iomem *cdmm;
+	u32 acsr;
+	unsigned int drb, type, size;
+	int err;
+
+	if (WARN_ON(!dev_type))
+		return IOMEM_ERR_PTR(-ENODEV);
+
+	bus = mips_cdmm_get_bus();
+	err = mips_cdmm_setup(bus);
+	if (err)
+		return IOMEM_ERR_PTR(err);
+
+	/* Skip the first block if it's reserved for more registers */
+	drb = bus->drbs_reserved;
+	cdmm = bus->regs;
+
+	/* Look for a specific device type */
+	for (; drb < bus->drbs; drb += size + 1) {
+		acsr = __raw_readl(cdmm + drb * CDMM_DRB_SIZE);
+		type = (acsr & CDMM_ACSR_DEVTYPE) >> CDMM_ACSR_DEVTYPE_SHIFT;
+		if (type == dev_type)
+			return cdmm + drb * CDMM_DRB_SIZE;
+		size = (acsr & CDMM_ACSR_DEVSIZE) >> CDMM_ACSR_DEVSIZE_SHIFT;
+	}
+
+	return IOMEM_ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL_GPL(mips_cdmm_early_probe);
+
+/**
+ * mips_cdmm_release() - Release a removed CDMM device.
+ * @dev:	Device object
+ *
+ * Clean up the struct mips_cdmm_device for an unused CDMM device. This is
+ * called automatically by the driver core when a device is removed.
+ */
+static void mips_cdmm_release(struct device *dev)
+{
+	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);
+
+	kfree(cdev);
+}
+
+/**
+ * mips_cdmm_bus_discover() - Discover the devices on the CDMM bus.
+ * @bus:	CDMM bus information, must already be set up.
+ */
+static void mips_cdmm_bus_discover(struct mips_cdmm_bus *bus)
+{
+	void __iomem *cdmm;
+	u32 acsr;
+	unsigned int drb, type, size, rev;
+	struct mips_cdmm_device *dev;
+	unsigned int cpu = smp_processor_id();
+	int ret = 0;
+	int id = 0;
+
+	/* Skip the first block if it's reserved for more registers */
+	drb = bus->drbs_reserved;
+	cdmm = bus->regs;
+
+	/* Discover devices */
+	bus->discovered = true;
+	pr_info("cdmm%u discovery (%u blocks)\n", cpu, bus->drbs);
+	for (; drb < bus->drbs; drb += size + 1) {
+		acsr = __raw_readl(cdmm + drb * CDMM_DRB_SIZE);
+		type = (acsr & CDMM_ACSR_DEVTYPE) >> CDMM_ACSR_DEVTYPE_SHIFT;
+		size = (acsr & CDMM_ACSR_DEVSIZE) >> CDMM_ACSR_DEVSIZE_SHIFT;
+		rev  = (acsr & CDMM_ACSR_DEVREV)  >> CDMM_ACSR_DEVREV_SHIFT;
+
+		if (!type)
+			continue;
+
+		pr_info("cdmm%u-%u: @%u (%#x..%#x), type 0x%02x, rev %u\n",
+			cpu, id, drb, drb * CDMM_DRB_SIZE,
+			(drb + size + 1) * CDMM_DRB_SIZE - 1,
+			type, rev);
+
+		dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+		if (!dev)
+			break;
+
+		dev->cpu = cpu;
+		dev->res.start = bus->phys + drb * CDMM_DRB_SIZE;
+		dev->res.end = bus->phys +
+				(drb + size + 1) * CDMM_DRB_SIZE - 1;
+		dev->res.flags = IORESOURCE_MEM;
+		dev->type = type;
+		dev->rev = rev;
+		dev->dev.parent = get_cpu_device(cpu);
+		dev->dev.bus = &mips_cdmm_bustype;
+		dev->dev.id = atomic_inc_return(&mips_cdmm_next_id);
+		dev->dev.release = mips_cdmm_release;
+
+		dev_set_name(&dev->dev, "cdmm%u-%u", cpu, id);
+		++id;
+		ret = device_register(&dev->dev);
+		if (ret)
+			put_device(&dev->dev);
+	}
+}
+
+
+/*
+ * CPU hotplug and initialisation
+ *
+ * All the CDMM driver callbacks need to be executed on the appropriate CPU from
+ * workqueues. For the CPU callbacks, they need to be called for all devices on
+ * that CPU, so the work function calls bus_for_each_dev, using a helper
+ * (generated with BUILD_PERDEV_HELPER) to call the driver callback if the
+ * device's CPU matches.
+ */
+
+/**
+ * BUILD_PERDEV_HELPER() - Helper to call a CDMM driver callback if CPU matches.
+ * @_name:	Name of CDMM driver callback function.
+ *
+ * Generates a bus_for_each_dev callback function to call a specific CDMM driver
+ * callback function for the device if the device's CPU matches that pointed to
+ * by the data argument.
+ *
+ * This is used for informing drivers for all devices on a given CPU of some
+ * event (such as the CPU going online/offline).
+ *
+ * It is expected to already be called from the appropriate CPU.
+ */
+#define BUILD_PERDEV_HELPER(_name)					\
+static int mips_cdmm_##_name##_helper(struct device *dev, void *data)	\
+{									\
+	struct mips_cdmm_device *cdev = to_mips_cdmm_device(dev);	\
+	struct mips_cdmm_driver *cdrv;					\
+	unsigned int cpu = *(unsigned int *)data;			\
+									\
+	if (cdev->cpu != cpu || !dev->driver)				\
+		return 0;						\
+									\
+	cdrv = to_mips_cdmm_driver(dev->driver);			\
+	if (!cdrv->_name)						\
+		return 0;						\
+	return cdrv->_name(cdev);					\
+}
+
+/* bus_for_each_dev callback helper functions */
+BUILD_PERDEV_HELPER(cpu_down)       /* int mips_cdmm_cpu_down_helper(...) */
+BUILD_PERDEV_HELPER(cpu_up)         /* int mips_cdmm_cpu_up_helper(...) */
+
+/**
+ * mips_cdmm_cpu_down_prep() - Callback for CPUHP DOWN_PREP:
+ *			       Tear down the CDMM bus.
+ * @cpu:	unsigned int CPU number.
+ *
+ * This function is executed on the hotplugged CPU and calls the CDMM
+ * driver cpu_down callback for all devices on that CPU.
+ */
+static int mips_cdmm_cpu_down_prep(unsigned int cpu)
+{
+	struct mips_cdmm_bus *bus;
+	long ret;
+
+	/* Inform all the devices on the bus */
+	ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, &cpu,
+			       mips_cdmm_cpu_down_helper);
+
+	/*
+	 * While bus is offline, each use of it should reconfigure it just in
+	 * case it is first use when coming back online again.
+	 */
+	bus = mips_cdmm_get_bus();
+	if (!IS_ERR(bus))
+		bus->offline = true;
+
+	return ret;
+}
+
+/**
+ * mips_cdmm_cpu_online() - Callback for CPUHP ONLINE: Bring up the CDMM bus.
+ * @cpu:	unsigned int CPU number.
+ *
+ * This work_on_cpu callback function is executed on a given CPU to discover
+ * CDMM devices on that CPU, or to call the CDMM driver cpu_up callback for all
+ * devices already discovered on that CPU.
+ *
+ * It is used as work_on_cpu callback function during
+ * initialisation. When CPUs are brought online the function is
+ * invoked directly on the hotplugged CPU.
+ */
+static int mips_cdmm_cpu_online(unsigned int cpu)
+{
+	struct mips_cdmm_bus *bus;
+	long ret;
+
+	bus = mips_cdmm_get_bus();
+	ret = mips_cdmm_setup(bus);
+	if (ret)
+		return ret;
+
+	/* Bus now set up, so we can drop the offline flag if still set */
+	bus->offline = false;
+
+	if (!bus->discovered)
+		mips_cdmm_bus_discover(bus);
+	else
+		/* Inform all the devices on the bus */
+		ret = bus_for_each_dev(&mips_cdmm_bustype, NULL, &cpu,
+				       mips_cdmm_cpu_up_helper);
+
+	return ret;
+}
+
+/**
+ * mips_cdmm_init() - Initialise CDMM bus.
+ *
+ * Initialise CDMM bus, discover CDMM devices for online CPUs, and arrange for
+ * hotplug notifications so the CDMM drivers can be kept up to date.
+ */
+static int __init mips_cdmm_init(void)
+{
+	int ret;
+
+	/* Register the bus */
+	ret = bus_register(&mips_cdmm_bustype);
+	if (ret)
+		return ret;
+
+	/* We want to be notified about new CPUs */
+	ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "bus/cdmm:online",
+				mips_cdmm_cpu_online, mips_cdmm_cpu_down_prep);
+	if (ret < 0)
+		pr_warn("cdmm: Failed to register CPU notifier\n");
+
+	return ret;
+}
+subsys_initcall(mips_cdmm_init);
diff --git a/drivers/bus/mvebu-mbus.c b/drivers/bus/mvebu-mbus.c
new file mode 100644
index 000000000..70db4d563
--- /dev/null
+++ b/drivers/bus/mvebu-mbus.c
@@ -0,0 +1,1378 @@
+/*
+ * Address map functions for Marvell EBU SoCs (Kirkwood, Armada
+ * 370/XP, Dove, Orion5x and MV78xx0)
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * The Marvell EBU SoCs have a configurable physical address space:
+ * the physical address at which certain devices (PCIe, NOR, NAND,
+ * etc.) sit can be configured. The configuration takes place through
+ * two sets of registers:
+ *
+ * - One to configure the access of the CPU to the devices. Depending
+ *   on the families, there are between 8 and 20 configurable windows,
+ *   each can be use to create a physical memory window that maps to a
+ *   specific device. Devices are identified by a tuple (target,
+ *   attribute).
+ *
+ * - One to configure the access to the CPU to the SDRAM. There are
+ *   either 2 (for Dove) or 4 (for other families) windows to map the
+ *   SDRAM into the physical address space.
+ *
+ * This driver:
+ *
+ * - Reads out the SDRAM address decoding windows at initialization
+ *   time, and fills the mvebu_mbus_dram_info structure with these
+ *   informations. The exported function mv_mbus_dram_info() allow
+ *   device drivers to get those informations related to the SDRAM
+ *   address decoding windows. This is because devices also have their
+ *   own windows (configured through registers that are part of each
+ *   device register space), and therefore the drivers for Marvell
+ *   devices have to configure those device -> SDRAM windows to ensure
+ *   that DMA works properly.
+ *
+ * - Provides an API for platform code or device drivers to
+ *   dynamically add or remove address decoding windows for the CPU ->
+ *   device accesses. This API is mvebu_mbus_add_window_by_id(),
+ *   mvebu_mbus_add_window_remap_by_id() and
+ *   mvebu_mbus_del_window().
+ *
+ * - Provides a debugfs interface in /sys/kernel/debug/mvebu-mbus/ to
+ *   see the list of CPU -> SDRAM windows and their configuration
+ *   (file 'sdram') and the list of CPU -> devices windows and their
+ *   configuration (file 'devices').
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/mbus.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/debugfs.h>
+#include <linux/log2.h>
+#include <linux/memblock.h>
+#include <linux/syscore_ops.h>
+
+/*
+ * DDR target is the same on all platforms.
+ */
+#define TARGET_DDR		0
+
+/*
+ * CPU Address Decode Windows registers
+ */
+#define WIN_CTRL_OFF		0x0000
+#define   WIN_CTRL_ENABLE       BIT(0)
+/* Only on HW I/O coherency capable platforms */
+#define   WIN_CTRL_SYNCBARRIER  BIT(1)
+#define   WIN_CTRL_TGT_MASK     0xf0
+#define   WIN_CTRL_TGT_SHIFT    4
+#define   WIN_CTRL_ATTR_MASK    0xff00
+#define   WIN_CTRL_ATTR_SHIFT   8
+#define   WIN_CTRL_SIZE_MASK    0xffff0000
+#define   WIN_CTRL_SIZE_SHIFT   16
+#define WIN_BASE_OFF		0x0004
+#define   WIN_BASE_LOW          0xffff0000
+#define   WIN_BASE_HIGH         0xf
+#define WIN_REMAP_LO_OFF	0x0008
+#define   WIN_REMAP_LOW         0xffff0000
+#define WIN_REMAP_HI_OFF	0x000c
+
+#define UNIT_SYNC_BARRIER_OFF   0x84
+#define   UNIT_SYNC_BARRIER_ALL 0xFFFF
+
+#define ATTR_HW_COHERENCY	(0x1 << 4)
+
+#define DDR_BASE_CS_OFF(n)	(0x0000 + ((n) << 3))
+#define  DDR_BASE_CS_HIGH_MASK  0xf
+#define  DDR_BASE_CS_LOW_MASK   0xff000000
+#define DDR_SIZE_CS_OFF(n)	(0x0004 + ((n) << 3))
+#define  DDR_SIZE_ENABLED       BIT(0)
+#define  DDR_SIZE_CS_MASK       0x1c
+#define  DDR_SIZE_CS_SHIFT      2
+#define  DDR_SIZE_MASK          0xff000000
+
+#define DOVE_DDR_BASE_CS_OFF(n) ((n) << 4)
+
+/* Relative to mbusbridge_base */
+#define MBUS_BRIDGE_CTRL_OFF	0x0
+#define MBUS_BRIDGE_BASE_OFF	0x4
+
+/* Maximum number of windows, for all known platforms */
+#define MBUS_WINS_MAX           20
+
+struct mvebu_mbus_state;
+
+struct mvebu_mbus_soc_data {
+	unsigned int num_wins;
+	bool has_mbus_bridge;
+	unsigned int (*win_cfg_offset)(const int win);
+	unsigned int (*win_remap_offset)(const int win);
+	void (*setup_cpu_target)(struct mvebu_mbus_state *s);
+	int (*save_cpu_target)(struct mvebu_mbus_state *s,
+			       u32 __iomem *store_addr);
+	int (*show_cpu_target)(struct mvebu_mbus_state *s,
+			       struct seq_file *seq, void *v);
+};
+
+/*
+ * Used to store the state of one MBus window accross suspend/resume.
+ */
+struct mvebu_mbus_win_data {
+	u32 ctrl;
+	u32 base;
+	u32 remap_lo;
+	u32 remap_hi;
+};
+
+struct mvebu_mbus_state {
+	void __iomem *mbuswins_base;
+	void __iomem *sdramwins_base;
+	void __iomem *mbusbridge_base;
+	phys_addr_t sdramwins_phys_base;
+	struct dentry *debugfs_root;
+	struct dentry *debugfs_sdram;
+	struct dentry *debugfs_devs;
+	struct resource pcie_mem_aperture;
+	struct resource pcie_io_aperture;
+	const struct mvebu_mbus_soc_data *soc;
+	int hw_io_coherency;
+
+	/* Used during suspend/resume */
+	u32 mbus_bridge_ctrl;
+	u32 mbus_bridge_base;
+	struct mvebu_mbus_win_data wins[MBUS_WINS_MAX];
+};
+
+static struct mvebu_mbus_state mbus_state;
+
+/*
+ * We provide two variants of the mv_mbus_dram_info() function:
+ *
+ * - The normal one, where the described DRAM ranges may overlap with
+ *   the I/O windows, but for which the DRAM ranges are guaranteed to
+ *   have a power of two size. Such ranges are suitable for the DMA
+ *   masters that only DMA between the RAM and the device, which is
+ *   actually all devices except the crypto engines.
+ *
+ * - The 'nooverlap' one, where the described DRAM ranges are
+ *   guaranteed to not overlap with the I/O windows, but for which the
+ *   DRAM ranges will not have power of two sizes. They will only be
+ *   aligned on a 64 KB boundary, and have a size multiple of 64
+ *   KB. Such ranges are suitable for the DMA masters that DMA between
+ *   the crypto SRAM (which is mapped through an I/O window) and a
+ *   device. This is the case for the crypto engines.
+ */
+
+static struct mbus_dram_target_info mvebu_mbus_dram_info;
+static struct mbus_dram_target_info mvebu_mbus_dram_info_nooverlap;
+
+const struct mbus_dram_target_info *mv_mbus_dram_info(void)
+{
+	return &mvebu_mbus_dram_info;
+}
+EXPORT_SYMBOL_GPL(mv_mbus_dram_info);
+
+const struct mbus_dram_target_info *mv_mbus_dram_info_nooverlap(void)
+{
+	return &mvebu_mbus_dram_info_nooverlap;
+}
+EXPORT_SYMBOL_GPL(mv_mbus_dram_info_nooverlap);
+
+/* Checks whether the given window has remap capability */
+static bool mvebu_mbus_window_is_remappable(struct mvebu_mbus_state *mbus,
+					    const int win)
+{
+	return mbus->soc->win_remap_offset(win) != MVEBU_MBUS_NO_REMAP;
+}
+
+/*
+ * Functions to manipulate the address decoding windows
+ */
+
+static void mvebu_mbus_read_window(struct mvebu_mbus_state *mbus,
+				   int win, int *enabled, u64 *base,
+				   u32 *size, u8 *target, u8 *attr,
+				   u64 *remap)
+{
+	void __iomem *addr = mbus->mbuswins_base +
+		mbus->soc->win_cfg_offset(win);
+	u32 basereg = readl(addr + WIN_BASE_OFF);
+	u32 ctrlreg = readl(addr + WIN_CTRL_OFF);
+
+	if (!(ctrlreg & WIN_CTRL_ENABLE)) {
+		*enabled = 0;
+		return;
+	}
+
+	*enabled = 1;
+	*base = ((u64)basereg & WIN_BASE_HIGH) << 32;
+	*base |= (basereg & WIN_BASE_LOW);
+	*size = (ctrlreg | ~WIN_CTRL_SIZE_MASK) + 1;
+
+	if (target)
+		*target = (ctrlreg & WIN_CTRL_TGT_MASK) >> WIN_CTRL_TGT_SHIFT;
+
+	if (attr)
+		*attr = (ctrlreg & WIN_CTRL_ATTR_MASK) >> WIN_CTRL_ATTR_SHIFT;
+
+	if (remap) {
+		if (mvebu_mbus_window_is_remappable(mbus, win)) {
+			u32 remap_low, remap_hi;
+			void __iomem *addr_rmp = mbus->mbuswins_base +
+				mbus->soc->win_remap_offset(win);
+			remap_low = readl(addr_rmp + WIN_REMAP_LO_OFF);
+			remap_hi  = readl(addr_rmp + WIN_REMAP_HI_OFF);
+			*remap = ((u64)remap_hi << 32) | remap_low;
+		} else
+			*remap = 0;
+	}
+}
+
+static void mvebu_mbus_disable_window(struct mvebu_mbus_state *mbus,
+				      int win)
+{
+	void __iomem *addr;
+
+	addr = mbus->mbuswins_base + mbus->soc->win_cfg_offset(win);
+	writel(0, addr + WIN_BASE_OFF);
+	writel(0, addr + WIN_CTRL_OFF);
+
+	if (mvebu_mbus_window_is_remappable(mbus, win)) {
+		addr = mbus->mbuswins_base + mbus->soc->win_remap_offset(win);
+		writel(0, addr + WIN_REMAP_LO_OFF);
+		writel(0, addr + WIN_REMAP_HI_OFF);
+	}
+}
+
+/* Checks whether the given window number is available */
+
+static int mvebu_mbus_window_is_free(struct mvebu_mbus_state *mbus,
+				     const int win)
+{
+	void __iomem *addr = mbus->mbuswins_base +
+		mbus->soc->win_cfg_offset(win);
+	u32 ctrl = readl(addr + WIN_CTRL_OFF);
+
+	return !(ctrl & WIN_CTRL_ENABLE);
+}
+
+/*
+ * Checks whether the given (base, base+size) area doesn't overlap an
+ * existing region
+ */
+static int mvebu_mbus_window_conflicts(struct mvebu_mbus_state *mbus,
+				       phys_addr_t base, size_t size,
+				       u8 target, u8 attr)
+{
+	u64 end = (u64)base + size;
+	int win;
+
+	for (win = 0; win < mbus->soc->num_wins; win++) {
+		u64 wbase, wend;
+		u32 wsize;
+		u8 wtarget, wattr;
+		int enabled;
+
+		mvebu_mbus_read_window(mbus, win,
+				       &enabled, &wbase, &wsize,
+				       &wtarget, &wattr, NULL);
+
+		if (!enabled)
+			continue;
+
+		wend = wbase + wsize;
+
+		/*
+		 * Check if the current window overlaps with the
+		 * proposed physical range
+		 */
+		if ((u64)base < wend && end > wbase)
+			return 0;
+	}
+
+	return 1;
+}
+
+static int mvebu_mbus_find_window(struct mvebu_mbus_state *mbus,
+				  phys_addr_t base, size_t size)
+{
+	int win;
+
+	for (win = 0; win < mbus->soc->num_wins; win++) {
+		u64 wbase;
+		u32 wsize;
+		int enabled;
+
+		mvebu_mbus_read_window(mbus, win,
+				       &enabled, &wbase, &wsize,
+				       NULL, NULL, NULL);
+
+		if (!enabled)
+			continue;
+
+		if (base == wbase && size == wsize)
+			return win;
+	}
+
+	return -ENODEV;
+}
+
+static int mvebu_mbus_setup_window(struct mvebu_mbus_state *mbus,
+				   int win, phys_addr_t base, size_t size,
+				   phys_addr_t remap, u8 target,
+				   u8 attr)
+{
+	void __iomem *addr = mbus->mbuswins_base +
+		mbus->soc->win_cfg_offset(win);
+	u32 ctrl, remap_addr;
+
+	if (!is_power_of_2(size)) {
+		WARN(true, "Invalid MBus window size: 0x%zx\n", size);
+		return -EINVAL;
+	}
+
+	if ((base & (phys_addr_t)(size - 1)) != 0) {
+		WARN(true, "Invalid MBus base/size: %pa len 0x%zx\n", &base,
+		     size);
+		return -EINVAL;
+	}
+
+	ctrl = ((size - 1) & WIN_CTRL_SIZE_MASK) |
+		(attr << WIN_CTRL_ATTR_SHIFT)    |
+		(target << WIN_CTRL_TGT_SHIFT)   |
+		WIN_CTRL_ENABLE;
+	if (mbus->hw_io_coherency)
+		ctrl |= WIN_CTRL_SYNCBARRIER;
+
+	writel(base & WIN_BASE_LOW, addr + WIN_BASE_OFF);
+	writel(ctrl, addr + WIN_CTRL_OFF);
+
+	if (mvebu_mbus_window_is_remappable(mbus, win)) {
+		void __iomem *addr_rmp = mbus->mbuswins_base +
+			mbus->soc->win_remap_offset(win);
+
+		if (remap == MVEBU_MBUS_NO_REMAP)
+			remap_addr = base;
+		else
+			remap_addr = remap;
+		writel(remap_addr & WIN_REMAP_LOW, addr_rmp + WIN_REMAP_LO_OFF);
+		writel(0, addr_rmp + WIN_REMAP_HI_OFF);
+	}
+
+	return 0;
+}
+
+static int mvebu_mbus_alloc_window(struct mvebu_mbus_state *mbus,
+				   phys_addr_t base, size_t size,
+				   phys_addr_t remap, u8 target,
+				   u8 attr)
+{
+	int win;
+
+	if (remap == MVEBU_MBUS_NO_REMAP) {
+		for (win = 0; win < mbus->soc->num_wins; win++) {
+			if (mvebu_mbus_window_is_remappable(mbus, win))
+				continue;
+
+			if (mvebu_mbus_window_is_free(mbus, win))
+				return mvebu_mbus_setup_window(mbus, win, base,
+							       size, remap,
+							       target, attr);
+		}
+	}
+
+	for (win = 0; win < mbus->soc->num_wins; win++) {
+		/* Skip window if need remap but is not supported */
+		if ((remap != MVEBU_MBUS_NO_REMAP) &&
+		    !mvebu_mbus_window_is_remappable(mbus, win))
+			continue;
+
+		if (mvebu_mbus_window_is_free(mbus, win))
+			return mvebu_mbus_setup_window(mbus, win, base, size,
+						       remap, target, attr);
+	}
+
+	return -ENOMEM;
+}
+
+/*
+ * Debugfs debugging
+ */
+
+/* Common function used for Dove, Kirkwood, Armada 370/XP and Orion 5x */
+static int mvebu_sdram_debug_show_orion(struct mvebu_mbus_state *mbus,
+					struct seq_file *seq, void *v)
+{
+	int i;
+
+	for (i = 0; i < 4; i++) {
+		u32 basereg = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
+		u32 sizereg = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
+		u64 base;
+		u32 size;
+
+		if (!(sizereg & DDR_SIZE_ENABLED)) {
+			seq_printf(seq, "[%d] disabled\n", i);
+			continue;
+		}
+
+		base = ((u64)basereg & DDR_BASE_CS_HIGH_MASK) << 32;
+		base |= basereg & DDR_BASE_CS_LOW_MASK;
+		size = (sizereg | ~DDR_SIZE_MASK);
+
+		seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n",
+			   i, (unsigned long long)base,
+			   (unsigned long long)base + size + 1,
+			   (sizereg & DDR_SIZE_CS_MASK) >> DDR_SIZE_CS_SHIFT);
+	}
+
+	return 0;
+}
+
+/* Special function for Dove */
+static int mvebu_sdram_debug_show_dove(struct mvebu_mbus_state *mbus,
+				       struct seq_file *seq, void *v)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
+		u64 base;
+		u32 size;
+
+		if (!(map & 1)) {
+			seq_printf(seq, "[%d] disabled\n", i);
+			continue;
+		}
+
+		base = map & 0xff800000;
+		size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
+
+		seq_printf(seq, "[%d] %016llx - %016llx : cs%d\n",
+			   i, (unsigned long long)base,
+			   (unsigned long long)base + size, i);
+	}
+
+	return 0;
+}
+
+static int mvebu_sdram_debug_show(struct seq_file *seq, void *v)
+{
+	struct mvebu_mbus_state *mbus = &mbus_state;
+	return mbus->soc->show_cpu_target(mbus, seq, v);
+}
+
+static int mvebu_sdram_debug_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mvebu_sdram_debug_show, inode->i_private);
+}
+
+static const struct file_operations mvebu_sdram_debug_fops = {
+	.open = mvebu_sdram_debug_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static int mvebu_devs_debug_show(struct seq_file *seq, void *v)
+{
+	struct mvebu_mbus_state *mbus = &mbus_state;
+	int win;
+
+	for (win = 0; win < mbus->soc->num_wins; win++) {
+		u64 wbase, wremap;
+		u32 wsize;
+		u8 wtarget, wattr;
+		int enabled;
+
+		mvebu_mbus_read_window(mbus, win,
+				       &enabled, &wbase, &wsize,
+				       &wtarget, &wattr, &wremap);
+
+		if (!enabled) {
+			seq_printf(seq, "[%02d] disabled\n", win);
+			continue;
+		}
+
+		seq_printf(seq, "[%02d] %016llx - %016llx : %04x:%04x",
+			   win, (unsigned long long)wbase,
+			   (unsigned long long)(wbase + wsize), wtarget, wattr);
+
+		if (!is_power_of_2(wsize) ||
+		    ((wbase & (u64)(wsize - 1)) != 0))
+			seq_puts(seq, " (Invalid base/size!!)");
+
+		if (mvebu_mbus_window_is_remappable(mbus, win)) {
+			seq_printf(seq, " (remap %016llx)\n",
+				   (unsigned long long)wremap);
+		} else
+			seq_printf(seq, "\n");
+	}
+
+	return 0;
+}
+
+static int mvebu_devs_debug_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, mvebu_devs_debug_show, inode->i_private);
+}
+
+static const struct file_operations mvebu_devs_debug_fops = {
+	.open = mvebu_devs_debug_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+/*
+ * SoC-specific functions and definitions
+ */
+
+static unsigned int generic_mbus_win_cfg_offset(int win)
+{
+	return win << 4;
+}
+
+static unsigned int armada_370_xp_mbus_win_cfg_offset(int win)
+{
+	/* The register layout is a bit annoying and the below code
+	 * tries to cope with it.
+	 * - At offset 0x0, there are the registers for the first 8
+	 *   windows, with 4 registers of 32 bits per window (ctrl,
+	 *   base, remap low, remap high)
+	 * - Then at offset 0x80, there is a hole of 0x10 bytes for
+	 *   the internal registers base address and internal units
+	 *   sync barrier register.
+	 * - Then at offset 0x90, there the registers for 12
+	 *   windows, with only 2 registers of 32 bits per window
+	 *   (ctrl, base).
+	 */
+	if (win < 8)
+		return win << 4;
+	else
+		return 0x90 + ((win - 8) << 3);
+}
+
+static unsigned int mv78xx0_mbus_win_cfg_offset(int win)
+{
+	if (win < 8)
+		return win << 4;
+	else
+		return 0x900 + ((win - 8) << 4);
+}
+
+static unsigned int generic_mbus_win_remap_2_offset(int win)
+{
+	if (win < 2)
+		return generic_mbus_win_cfg_offset(win);
+	else
+		return MVEBU_MBUS_NO_REMAP;
+}
+
+static unsigned int generic_mbus_win_remap_4_offset(int win)
+{
+	if (win < 4)
+		return generic_mbus_win_cfg_offset(win);
+	else
+		return MVEBU_MBUS_NO_REMAP;
+}
+
+static unsigned int generic_mbus_win_remap_8_offset(int win)
+{
+	if (win < 8)
+		return generic_mbus_win_cfg_offset(win);
+	else
+		return MVEBU_MBUS_NO_REMAP;
+}
+
+static unsigned int armada_xp_mbus_win_remap_offset(int win)
+{
+	if (win < 8)
+		return generic_mbus_win_cfg_offset(win);
+	else if (win == 13)
+		return 0xF0 - WIN_REMAP_LO_OFF;
+	else
+		return MVEBU_MBUS_NO_REMAP;
+}
+
+/*
+ * Use the memblock information to find the MBus bridge hole in the
+ * physical address space.
+ */
+static void __init
+mvebu_mbus_find_bridge_hole(uint64_t *start, uint64_t *end)
+{
+	struct memblock_region *r;
+	uint64_t s = 0;
+
+	for_each_memblock(memory, r) {
+		/*
+		 * This part of the memory is above 4 GB, so we don't
+		 * care for the MBus bridge hole.
+		 */
+		if (r->base >= 0x100000000ULL)
+			continue;
+
+		/*
+		 * The MBus bridge hole is at the end of the RAM under
+		 * the 4 GB limit.
+		 */
+		if (r->base + r->size > s)
+			s = r->base + r->size;
+	}
+
+	*start = s;
+	*end = 0x100000000ULL;
+}
+
+/*
+ * This function fills in the mvebu_mbus_dram_info_nooverlap data
+ * structure, by looking at the mvebu_mbus_dram_info data, and
+ * removing the parts of it that overlap with I/O windows.
+ */
+static void __init
+mvebu_mbus_setup_cpu_target_nooverlap(struct mvebu_mbus_state *mbus)
+{
+	uint64_t mbus_bridge_base, mbus_bridge_end;
+	int cs_nooverlap = 0;
+	int i;
+
+	mvebu_mbus_find_bridge_hole(&mbus_bridge_base, &mbus_bridge_end);
+
+	for (i = 0; i < mvebu_mbus_dram_info.num_cs; i++) {
+		struct mbus_dram_window *w;
+		u64 base, size, end;
+
+		w = &mvebu_mbus_dram_info.cs[i];
+		base = w->base;
+		size = w->size;
+		end = base + size;
+
+		/*
+		 * The CS is fully enclosed inside the MBus bridge
+		 * area, so ignore it.
+		 */
+		if (base >= mbus_bridge_base && end <= mbus_bridge_end)
+			continue;
+
+		/*
+		 * Beginning of CS overlaps with end of MBus, raise CS
+		 * base address, and shrink its size.
+		 */
+		if (base >= mbus_bridge_base && end > mbus_bridge_end) {
+			size -= mbus_bridge_end - base;
+			base = mbus_bridge_end;
+		}
+
+		/*
+		 * End of CS overlaps with beginning of MBus, shrink
+		 * CS size.
+		 */
+		if (base < mbus_bridge_base && end > mbus_bridge_base)
+			size -= end - mbus_bridge_base;
+
+		w = &mvebu_mbus_dram_info_nooverlap.cs[cs_nooverlap++];
+		w->cs_index = i;
+		w->mbus_attr = 0xf & ~(1 << i);
+		if (mbus->hw_io_coherency)
+			w->mbus_attr |= ATTR_HW_COHERENCY;
+		w->base = base;
+		w->size = size;
+	}
+
+	mvebu_mbus_dram_info_nooverlap.mbus_dram_target_id = TARGET_DDR;
+	mvebu_mbus_dram_info_nooverlap.num_cs = cs_nooverlap;
+}
+
+static void __init
+mvebu_mbus_default_setup_cpu_target(struct mvebu_mbus_state *mbus)
+{
+	int i;
+	int cs;
+
+	mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
+
+	for (i = 0, cs = 0; i < 4; i++) {
+		u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
+		u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
+
+		/*
+		 * We only take care of entries for which the chip
+		 * select is enabled, and that don't have high base
+		 * address bits set (devices can only access the first
+		 * 32 bits of the memory).
+		 */
+		if ((size & DDR_SIZE_ENABLED) &&
+		    !(base & DDR_BASE_CS_HIGH_MASK)) {
+			struct mbus_dram_window *w;
+
+			w = &mvebu_mbus_dram_info.cs[cs++];
+			w->cs_index = i;
+			w->mbus_attr = 0xf & ~(1 << i);
+			if (mbus->hw_io_coherency)
+				w->mbus_attr |= ATTR_HW_COHERENCY;
+			w->base = base & DDR_BASE_CS_LOW_MASK;
+			w->size = (u64)(size | ~DDR_SIZE_MASK) + 1;
+		}
+	}
+	mvebu_mbus_dram_info.num_cs = cs;
+}
+
+static int
+mvebu_mbus_default_save_cpu_target(struct mvebu_mbus_state *mbus,
+				   u32 __iomem *store_addr)
+{
+	int i;
+
+	for (i = 0; i < 4; i++) {
+		u32 base = readl(mbus->sdramwins_base + DDR_BASE_CS_OFF(i));
+		u32 size = readl(mbus->sdramwins_base + DDR_SIZE_CS_OFF(i));
+
+		writel(mbus->sdramwins_phys_base + DDR_BASE_CS_OFF(i),
+		       store_addr++);
+		writel(base, store_addr++);
+		writel(mbus->sdramwins_phys_base + DDR_SIZE_CS_OFF(i),
+		       store_addr++);
+		writel(size, store_addr++);
+	}
+
+	/* We've written 16 words to the store address */
+	return 16;
+}
+
+static void __init
+mvebu_mbus_dove_setup_cpu_target(struct mvebu_mbus_state *mbus)
+{
+	int i;
+	int cs;
+
+	mvebu_mbus_dram_info.mbus_dram_target_id = TARGET_DDR;
+
+	for (i = 0, cs = 0; i < 2; i++) {
+		u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
+
+		/*
+		 * Chip select enabled?
+		 */
+		if (map & 1) {
+			struct mbus_dram_window *w;
+
+			w = &mvebu_mbus_dram_info.cs[cs++];
+			w->cs_index = i;
+			w->mbus_attr = 0; /* CS address decoding done inside */
+					  /* the DDR controller, no need to  */
+					  /* provide attributes */
+			w->base = map & 0xff800000;
+			w->size = 0x100000 << (((map & 0x000f0000) >> 16) - 4);
+		}
+	}
+
+	mvebu_mbus_dram_info.num_cs = cs;
+}
+
+static int
+mvebu_mbus_dove_save_cpu_target(struct mvebu_mbus_state *mbus,
+				u32 __iomem *store_addr)
+{
+	int i;
+
+	for (i = 0; i < 2; i++) {
+		u32 map = readl(mbus->sdramwins_base + DOVE_DDR_BASE_CS_OFF(i));
+
+		writel(mbus->sdramwins_phys_base + DOVE_DDR_BASE_CS_OFF(i),
+		       store_addr++);
+		writel(map, store_addr++);
+	}
+
+	/* We've written 4 words to the store address */
+	return 4;
+}
+
+int mvebu_mbus_save_cpu_target(u32 __iomem *store_addr)
+{
+	return mbus_state.soc->save_cpu_target(&mbus_state, store_addr);
+}
+
+static const struct mvebu_mbus_soc_data armada_370_mbus_data = {
+	.num_wins            = 20,
+	.has_mbus_bridge     = true,
+	.win_cfg_offset      = armada_370_xp_mbus_win_cfg_offset,
+	.win_remap_offset    = generic_mbus_win_remap_8_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+};
+
+static const struct mvebu_mbus_soc_data armada_xp_mbus_data = {
+	.num_wins            = 20,
+	.has_mbus_bridge     = true,
+	.win_cfg_offset      = armada_370_xp_mbus_win_cfg_offset,
+	.win_remap_offset    = armada_xp_mbus_win_remap_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+};
+
+static const struct mvebu_mbus_soc_data kirkwood_mbus_data = {
+	.num_wins            = 8,
+	.win_cfg_offset      = generic_mbus_win_cfg_offset,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+	.win_remap_offset    = generic_mbus_win_remap_4_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+};
+
+static const struct mvebu_mbus_soc_data dove_mbus_data = {
+	.num_wins            = 8,
+	.win_cfg_offset      = generic_mbus_win_cfg_offset,
+	.save_cpu_target     = mvebu_mbus_dove_save_cpu_target,
+	.win_remap_offset    = generic_mbus_win_remap_4_offset,
+	.setup_cpu_target    = mvebu_mbus_dove_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_dove,
+};
+
+/*
+ * Some variants of Orion5x have 4 remappable windows, some other have
+ * only two of them.
+ */
+static const struct mvebu_mbus_soc_data orion5x_4win_mbus_data = {
+	.num_wins            = 8,
+	.win_cfg_offset      = generic_mbus_win_cfg_offset,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+	.win_remap_offset    = generic_mbus_win_remap_4_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+};
+
+static const struct mvebu_mbus_soc_data orion5x_2win_mbus_data = {
+	.num_wins            = 8,
+	.win_cfg_offset      = generic_mbus_win_cfg_offset,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+	.win_remap_offset    = generic_mbus_win_remap_2_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+};
+
+static const struct mvebu_mbus_soc_data mv78xx0_mbus_data = {
+	.num_wins            = 14,
+	.win_cfg_offset      = mv78xx0_mbus_win_cfg_offset,
+	.save_cpu_target     = mvebu_mbus_default_save_cpu_target,
+	.win_remap_offset    = generic_mbus_win_remap_8_offset,
+	.setup_cpu_target    = mvebu_mbus_default_setup_cpu_target,
+	.show_cpu_target     = mvebu_sdram_debug_show_orion,
+};
+
+static const struct of_device_id of_mvebu_mbus_ids[] = {
+	{ .compatible = "marvell,armada370-mbus",
+	  .data = &armada_370_mbus_data, },
+	{ .compatible = "marvell,armada375-mbus",
+	  .data = &armada_xp_mbus_data, },
+	{ .compatible = "marvell,armada380-mbus",
+	  .data = &armada_xp_mbus_data, },
+	{ .compatible = "marvell,armadaxp-mbus",
+	  .data = &armada_xp_mbus_data, },
+	{ .compatible = "marvell,kirkwood-mbus",
+	  .data = &kirkwood_mbus_data, },
+	{ .compatible = "marvell,dove-mbus",
+	  .data = &dove_mbus_data, },
+	{ .compatible = "marvell,orion5x-88f5281-mbus",
+	  .data = &orion5x_4win_mbus_data, },
+	{ .compatible = "marvell,orion5x-88f5182-mbus",
+	  .data = &orion5x_2win_mbus_data, },
+	{ .compatible = "marvell,orion5x-88f5181-mbus",
+	  .data = &orion5x_2win_mbus_data, },
+	{ .compatible = "marvell,orion5x-88f6183-mbus",
+	  .data = &orion5x_4win_mbus_data, },
+	{ .compatible = "marvell,mv78xx0-mbus",
+	  .data = &mv78xx0_mbus_data, },
+	{ },
+};
+
+/*
+ * Public API of the driver
+ */
+int mvebu_mbus_add_window_remap_by_id(unsigned int target,
+				      unsigned int attribute,
+				      phys_addr_t base, size_t size,
+				      phys_addr_t remap)
+{
+	struct mvebu_mbus_state *s = &mbus_state;
+
+	if (!mvebu_mbus_window_conflicts(s, base, size, target, attribute)) {
+		pr_err("cannot add window '%x:%x', conflicts with another window\n",
+		       target, attribute);
+		return -EINVAL;
+	}
+
+	return mvebu_mbus_alloc_window(s, base, size, remap, target, attribute);
+}
+
+int mvebu_mbus_add_window_by_id(unsigned int target, unsigned int attribute,
+				phys_addr_t base, size_t size)
+{
+	return mvebu_mbus_add_window_remap_by_id(target, attribute, base,
+						 size, MVEBU_MBUS_NO_REMAP);
+}
+
+int mvebu_mbus_del_window(phys_addr_t base, size_t size)
+{
+	int win;
+
+	win = mvebu_mbus_find_window(&mbus_state, base, size);
+	if (win < 0)
+		return win;
+
+	mvebu_mbus_disable_window(&mbus_state, win);
+	return 0;
+}
+
+void mvebu_mbus_get_pcie_mem_aperture(struct resource *res)
+{
+	if (!res)
+		return;
+	*res = mbus_state.pcie_mem_aperture;
+}
+
+void mvebu_mbus_get_pcie_io_aperture(struct resource *res)
+{
+	if (!res)
+		return;
+	*res = mbus_state.pcie_io_aperture;
+}
+
+int mvebu_mbus_get_dram_win_info(phys_addr_t phyaddr, u8 *target, u8 *attr)
+{
+	const struct mbus_dram_target_info *dram;
+	int i;
+
+	/* Get dram info */
+	dram = mv_mbus_dram_info();
+	if (!dram) {
+		pr_err("missing DRAM information\n");
+		return -ENODEV;
+	}
+
+	/* Try to find matching DRAM window for phyaddr */
+	for (i = 0; i < dram->num_cs; i++) {
+		const struct mbus_dram_window *cs = dram->cs + i;
+
+		if (cs->base <= phyaddr &&
+			phyaddr <= (cs->base + cs->size - 1)) {
+			*target = dram->mbus_dram_target_id;
+			*attr = cs->mbus_attr;
+			return 0;
+		}
+	}
+
+	pr_err("invalid dram address %pa\n", &phyaddr);
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(mvebu_mbus_get_dram_win_info);
+
+int mvebu_mbus_get_io_win_info(phys_addr_t phyaddr, u32 *size, u8 *target,
+			       u8 *attr)
+{
+	int win;
+
+	for (win = 0; win < mbus_state.soc->num_wins; win++) {
+		u64 wbase;
+		int enabled;
+
+		mvebu_mbus_read_window(&mbus_state, win, &enabled, &wbase,
+				       size, target, attr, NULL);
+
+		if (!enabled)
+			continue;
+
+		if (wbase <= phyaddr && phyaddr <= wbase + *size)
+			return win;
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(mvebu_mbus_get_io_win_info);
+
+static __init int mvebu_mbus_debugfs_init(void)
+{
+	struct mvebu_mbus_state *s = &mbus_state;
+
+	/*
+	 * If no base has been initialized, doesn't make sense to
+	 * register the debugfs entries. We may be on a multiplatform
+	 * kernel that isn't running a Marvell EBU SoC.
+	 */
+	if (!s->mbuswins_base)
+		return 0;
+
+	s->debugfs_root = debugfs_create_dir("mvebu-mbus", NULL);
+	if (s->debugfs_root) {
+		s->debugfs_sdram = debugfs_create_file("sdram", S_IRUGO,
+						       s->debugfs_root, NULL,
+						       &mvebu_sdram_debug_fops);
+		s->debugfs_devs = debugfs_create_file("devices", S_IRUGO,
+						      s->debugfs_root, NULL,
+						      &mvebu_devs_debug_fops);
+	}
+
+	return 0;
+}
+fs_initcall(mvebu_mbus_debugfs_init);
+
+static int mvebu_mbus_suspend(void)
+{
+	struct mvebu_mbus_state *s = &mbus_state;
+	int win;
+
+	if (!s->mbusbridge_base)
+		return -ENODEV;
+
+	for (win = 0; win < s->soc->num_wins; win++) {
+		void __iomem *addr = s->mbuswins_base +
+			s->soc->win_cfg_offset(win);
+		void __iomem *addr_rmp;
+
+		s->wins[win].base = readl(addr + WIN_BASE_OFF);
+		s->wins[win].ctrl = readl(addr + WIN_CTRL_OFF);
+
+		if (!mvebu_mbus_window_is_remappable(s, win))
+			continue;
+
+		addr_rmp = s->mbuswins_base +
+			s->soc->win_remap_offset(win);
+
+		s->wins[win].remap_lo = readl(addr_rmp + WIN_REMAP_LO_OFF);
+		s->wins[win].remap_hi = readl(addr_rmp + WIN_REMAP_HI_OFF);
+	}
+
+	s->mbus_bridge_ctrl = readl(s->mbusbridge_base +
+				    MBUS_BRIDGE_CTRL_OFF);
+	s->mbus_bridge_base = readl(s->mbusbridge_base +
+				    MBUS_BRIDGE_BASE_OFF);
+
+	return 0;
+}
+
+static void mvebu_mbus_resume(void)
+{
+	struct mvebu_mbus_state *s = &mbus_state;
+	int win;
+
+	writel(s->mbus_bridge_ctrl,
+	       s->mbusbridge_base + MBUS_BRIDGE_CTRL_OFF);
+	writel(s->mbus_bridge_base,
+	       s->mbusbridge_base + MBUS_BRIDGE_BASE_OFF);
+
+	for (win = 0; win < s->soc->num_wins; win++) {
+		void __iomem *addr = s->mbuswins_base +
+			s->soc->win_cfg_offset(win);
+		void __iomem *addr_rmp;
+
+		writel(s->wins[win].base, addr + WIN_BASE_OFF);
+		writel(s->wins[win].ctrl, addr + WIN_CTRL_OFF);
+
+		if (!mvebu_mbus_window_is_remappable(s, win))
+			continue;
+
+		addr_rmp = s->mbuswins_base +
+			s->soc->win_remap_offset(win);
+
+		writel(s->wins[win].remap_lo, addr_rmp + WIN_REMAP_LO_OFF);
+		writel(s->wins[win].remap_hi, addr_rmp + WIN_REMAP_HI_OFF);
+	}
+}
+
+static struct syscore_ops mvebu_mbus_syscore_ops = {
+	.suspend	= mvebu_mbus_suspend,
+	.resume		= mvebu_mbus_resume,
+};
+
+static int __init mvebu_mbus_common_init(struct mvebu_mbus_state *mbus,
+					 phys_addr_t mbuswins_phys_base,
+					 size_t mbuswins_size,
+					 phys_addr_t sdramwins_phys_base,
+					 size_t sdramwins_size,
+					 phys_addr_t mbusbridge_phys_base,
+					 size_t mbusbridge_size,
+					 bool is_coherent)
+{
+	int win;
+
+	mbus->mbuswins_base = ioremap(mbuswins_phys_base, mbuswins_size);
+	if (!mbus->mbuswins_base)
+		return -ENOMEM;
+
+	mbus->sdramwins_base = ioremap(sdramwins_phys_base, sdramwins_size);
+	if (!mbus->sdramwins_base) {
+		iounmap(mbus_state.mbuswins_base);
+		return -ENOMEM;
+	}
+
+	mbus->sdramwins_phys_base = sdramwins_phys_base;
+
+	if (mbusbridge_phys_base) {
+		mbus->mbusbridge_base = ioremap(mbusbridge_phys_base,
+						mbusbridge_size);
+		if (!mbus->mbusbridge_base) {
+			iounmap(mbus->sdramwins_base);
+			iounmap(mbus->mbuswins_base);
+			return -ENOMEM;
+		}
+	} else
+		mbus->mbusbridge_base = NULL;
+
+	for (win = 0; win < mbus->soc->num_wins; win++)
+		mvebu_mbus_disable_window(mbus, win);
+
+	mbus->soc->setup_cpu_target(mbus);
+	mvebu_mbus_setup_cpu_target_nooverlap(mbus);
+
+	if (is_coherent)
+		writel(UNIT_SYNC_BARRIER_ALL,
+		       mbus->mbuswins_base + UNIT_SYNC_BARRIER_OFF);
+
+	register_syscore_ops(&mvebu_mbus_syscore_ops);
+
+	return 0;
+}
+
+int __init mvebu_mbus_init(const char *soc, phys_addr_t mbuswins_phys_base,
+			   size_t mbuswins_size,
+			   phys_addr_t sdramwins_phys_base,
+			   size_t sdramwins_size)
+{
+	const struct of_device_id *of_id;
+
+	for (of_id = of_mvebu_mbus_ids; of_id->compatible[0]; of_id++)
+		if (!strcmp(of_id->compatible, soc))
+			break;
+
+	if (!of_id->compatible[0]) {
+		pr_err("could not find a matching SoC family\n");
+		return -ENODEV;
+	}
+
+	mbus_state.soc = of_id->data;
+
+	return mvebu_mbus_common_init(&mbus_state,
+			mbuswins_phys_base,
+			mbuswins_size,
+			sdramwins_phys_base,
+			sdramwins_size, 0, 0, false);
+}
+
+#ifdef CONFIG_OF
+/*
+ * The window IDs in the ranges DT property have the following format:
+ *  - bits 28 to 31: MBus custom field
+ *  - bits 24 to 27: window target ID
+ *  - bits 16 to 23: window attribute ID
+ *  - bits  0 to 15: unused
+ */
+#define CUSTOM(id) (((id) & 0xF0000000) >> 24)
+#define TARGET(id) (((id) & 0x0F000000) >> 24)
+#define ATTR(id)   (((id) & 0x00FF0000) >> 16)
+
+static int __init mbus_dt_setup_win(struct mvebu_mbus_state *mbus,
+				    u32 base, u32 size,
+				    u8 target, u8 attr)
+{
+	if (!mvebu_mbus_window_conflicts(mbus, base, size, target, attr)) {
+		pr_err("cannot add window '%04x:%04x', conflicts with another window\n",
+		       target, attr);
+		return -EBUSY;
+	}
+
+	if (mvebu_mbus_alloc_window(mbus, base, size, MVEBU_MBUS_NO_REMAP,
+				    target, attr)) {
+		pr_err("cannot add window '%04x:%04x', too many windows\n",
+		       target, attr);
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static int __init
+mbus_parse_ranges(struct device_node *node,
+		  int *addr_cells, int *c_addr_cells, int *c_size_cells,
+		  int *cell_count, const __be32 **ranges_start,
+		  const __be32 **ranges_end)
+{
+	const __be32 *prop;
+	int ranges_len, tuple_len;
+
+	/* Allow a node with no 'ranges' property */
+	*ranges_start = of_get_property(node, "ranges", &ranges_len);
+	if (*ranges_start == NULL) {
+		*addr_cells = *c_addr_cells = *c_size_cells = *cell_count = 0;
+		*ranges_start = *ranges_end = NULL;
+		return 0;
+	}
+	*ranges_end = *ranges_start + ranges_len / sizeof(__be32);
+
+	*addr_cells = of_n_addr_cells(node);
+
+	prop = of_get_property(node, "#address-cells", NULL);
+	*c_addr_cells = be32_to_cpup(prop);
+
+	prop = of_get_property(node, "#size-cells", NULL);
+	*c_size_cells = be32_to_cpup(prop);
+
+	*cell_count = *addr_cells + *c_addr_cells + *c_size_cells;
+	tuple_len = (*cell_count) * sizeof(__be32);
+
+	if (ranges_len % tuple_len) {
+		pr_warn("malformed ranges entry '%s'\n", node->name);
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static int __init mbus_dt_setup(struct mvebu_mbus_state *mbus,
+				struct device_node *np)
+{
+	int addr_cells, c_addr_cells, c_size_cells;
+	int i, ret, cell_count;
+	const __be32 *r, *ranges_start, *ranges_end;
+
+	ret = mbus_parse_ranges(np, &addr_cells, &c_addr_cells,
+				&c_size_cells, &cell_count,
+				&ranges_start, &ranges_end);
+	if (ret < 0)
+		return ret;
+
+	for (i = 0, r = ranges_start; r < ranges_end; r += cell_count, i++) {
+		u32 windowid, base, size;
+		u8 target, attr;
+
+		/*
+		 * An entry with a non-zero custom field do not
+		 * correspond to a static window, so skip it.
+		 */
+		windowid = of_read_number(r, 1);
+		if (CUSTOM(windowid))
+			continue;
+
+		target = TARGET(windowid);
+		attr = ATTR(windowid);
+
+		base = of_read_number(r + c_addr_cells, addr_cells);
+		size = of_read_number(r + c_addr_cells + addr_cells,
+				      c_size_cells);
+		ret = mbus_dt_setup_win(mbus, base, size, target, attr);
+		if (ret < 0)
+			return ret;
+	}
+	return 0;
+}
+
+static void __init mvebu_mbus_get_pcie_resources(struct device_node *np,
+						 struct resource *mem,
+						 struct resource *io)
+{
+	u32 reg[2];
+	int ret;
+
+	/*
+	 * These are optional, so we make sure that resource_size(x) will
+	 * return 0.
+	 */
+	memset(mem, 0, sizeof(struct resource));
+	mem->end = -1;
+	memset(io, 0, sizeof(struct resource));
+	io->end = -1;
+
+	ret = of_property_read_u32_array(np, "pcie-mem-aperture", reg, ARRAY_SIZE(reg));
+	if (!ret) {
+		mem->start = reg[0];
+		mem->end = mem->start + reg[1] - 1;
+		mem->flags = IORESOURCE_MEM;
+	}
+
+	ret = of_property_read_u32_array(np, "pcie-io-aperture", reg, ARRAY_SIZE(reg));
+	if (!ret) {
+		io->start = reg[0];
+		io->end = io->start + reg[1] - 1;
+		io->flags = IORESOURCE_IO;
+	}
+}
+
+int __init mvebu_mbus_dt_init(bool is_coherent)
+{
+	struct resource mbuswins_res, sdramwins_res, mbusbridge_res;
+	struct device_node *np, *controller;
+	const struct of_device_id *of_id;
+	const __be32 *prop;
+	int ret;
+
+	np = of_find_matching_node_and_match(NULL, of_mvebu_mbus_ids, &of_id);
+	if (!np) {
+		pr_err("could not find a matching SoC family\n");
+		return -ENODEV;
+	}
+
+	mbus_state.soc = of_id->data;
+
+	prop = of_get_property(np, "controller", NULL);
+	if (!prop) {
+		pr_err("required 'controller' property missing\n");
+		return -EINVAL;
+	}
+
+	controller = of_find_node_by_phandle(be32_to_cpup(prop));
+	if (!controller) {
+		pr_err("could not find an 'mbus-controller' node\n");
+		return -ENODEV;
+	}
+
+	if (of_address_to_resource(controller, 0, &mbuswins_res)) {
+		pr_err("cannot get MBUS register address\n");
+		return -EINVAL;
+	}
+
+	if (of_address_to_resource(controller, 1, &sdramwins_res)) {
+		pr_err("cannot get SDRAM register address\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Set the resource to 0 so that it can be left unmapped by
+	 * mvebu_mbus_common_init() if the DT doesn't carry the
+	 * necessary information. This is needed to preserve backward
+	 * compatibility.
+	 */
+	memset(&mbusbridge_res, 0, sizeof(mbusbridge_res));
+
+	if (mbus_state.soc->has_mbus_bridge) {
+		if (of_address_to_resource(controller, 2, &mbusbridge_res))
+			pr_warn(FW_WARN "deprecated mbus-mvebu Device Tree, suspend/resume will not work\n");
+	}
+
+	mbus_state.hw_io_coherency = is_coherent;
+
+	/* Get optional pcie-{mem,io}-aperture properties */
+	mvebu_mbus_get_pcie_resources(np, &mbus_state.pcie_mem_aperture,
+					  &mbus_state.pcie_io_aperture);
+
+	ret = mvebu_mbus_common_init(&mbus_state,
+				     mbuswins_res.start,
+				     resource_size(&mbuswins_res),
+				     sdramwins_res.start,
+				     resource_size(&sdramwins_res),
+				     mbusbridge_res.start,
+				     resource_size(&mbusbridge_res),
+				     is_coherent);
+	if (ret)
+		return ret;
+
+	/* Setup statically declared windows in the DT */
+	return mbus_dt_setup(&mbus_state, np);
+}
+#endif
diff --git a/drivers/bus/omap-ocp2scp.c b/drivers/bus/omap-ocp2scp.c
new file mode 100644
index 000000000..77791f3dc
--- /dev/null
+++ b/drivers/bus/omap-ocp2scp.c
@@ -0,0 +1,128 @@
+/*
+ * omap-ocp2scp.c - transform ocp interface protocol to scp protocol
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Author: Kishon Vijay Abraham I <kishon@ti.com>
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+
+#define OCP2SCP_TIMING 0x18
+#define SYNC2_MASK 0xf
+
+static int ocp2scp_remove_devices(struct device *dev, void *c)
+{
+	struct platform_device *pdev = to_platform_device(dev);
+
+	platform_device_unregister(pdev);
+
+	return 0;
+}
+
+static int omap_ocp2scp_probe(struct platform_device *pdev)
+{
+	int ret;
+	u32 reg;
+	void __iomem *regs;
+	struct resource *res;
+	struct device_node *np = pdev->dev.of_node;
+
+	if (np) {
+		ret = of_platform_populate(np, NULL, NULL, &pdev->dev);
+		if (ret) {
+			dev_err(&pdev->dev,
+			    "failed to add resources for ocp2scp child\n");
+			goto err0;
+		}
+	}
+
+	pm_runtime_enable(&pdev->dev);
+	/*
+	 * As per AM572x TRM: http://www.ti.com/lit/ug/spruhz6/spruhz6.pdf
+	 * under section 26.3.2.2, table 26-26 OCP2SCP TIMING Caution;
+	 * As per OMAP4430 TRM: http://www.ti.com/lit/ug/swpu231ap/swpu231ap.pdf
+	 * under section 23.12.6.2.2 , Table 23-1213 OCP2SCP TIMING Caution;
+	 * As per OMAP4460 TRM: http://www.ti.com/lit/ug/swpu235ab/swpu235ab.pdf
+	 * under section 23.12.6.2.2, Table 23-1213 OCP2SCP TIMING Caution;
+	 * As per OMAP543x TRM http://www.ti.com/lit/pdf/swpu249
+	 * under section 27.3.2.2, Table 27-27 OCP2SCP TIMING Caution;
+	 *
+	 * Read path of OCP2SCP is not working properly due to low reset value
+	 * of SYNC2 parameter in OCP2SCP. Suggested reset value is 0x6 or more.
+	 */
+	if (!of_device_is_compatible(np, "ti,am437x-ocp2scp")) {
+		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+		regs = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(regs)) {
+			ret = PTR_ERR(regs);
+			goto err1;
+		}
+
+		pm_runtime_get_sync(&pdev->dev);
+		reg = readl_relaxed(regs + OCP2SCP_TIMING);
+		reg &= ~(SYNC2_MASK);
+		reg |= 0x6;
+		writel_relaxed(reg, regs + OCP2SCP_TIMING);
+		pm_runtime_put_sync(&pdev->dev);
+	}
+
+	return 0;
+
+err1:
+	pm_runtime_disable(&pdev->dev);
+
+err0:
+	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
+
+	return ret;
+}
+
+static int omap_ocp2scp_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	device_for_each_child(&pdev->dev, NULL, ocp2scp_remove_devices);
+
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id omap_ocp2scp_id_table[] = {
+	{ .compatible = "ti,omap-ocp2scp" },
+	{ .compatible = "ti,am437x-ocp2scp" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, omap_ocp2scp_id_table);
+#endif
+
+static struct platform_driver omap_ocp2scp_driver = {
+	.probe		= omap_ocp2scp_probe,
+	.remove		= omap_ocp2scp_remove,
+	.driver		= {
+		.name	= "omap-ocp2scp",
+		.of_match_table = of_match_ptr(omap_ocp2scp_id_table),
+	},
+};
+
+module_platform_driver(omap_ocp2scp_driver);
+
+MODULE_ALIAS("platform:omap-ocp2scp");
+MODULE_AUTHOR("Texas Instruments Inc.");
+MODULE_DESCRIPTION("OMAP OCP2SCP driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/omap_l3_noc.c b/drivers/bus/omap_l3_noc.c
new file mode 100644
index 000000000..dcfb32ee5
--- /dev/null
+++ b/drivers/bus/omap_l3_noc.c
@@ -0,0 +1,382 @@
+/*
+ * OMAP L3 Interconnect error handling driver
+ *
+ * Copyright (C) 2011-2015 Texas Instruments Incorporated - http://www.ti.com/
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *	Sricharan <r.sricharan@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "omap_l3_noc.h"
+
+/**
+ * l3_handle_target() - Handle Target specific parse and reporting
+ * @l3:		pointer to l3 struct
+ * @base:	base address of clkdm
+ * @flag_mux:	flagmux corresponding to the event
+ * @err_src:	error source index of the slave (target)
+ *
+ * This does the second part of the error interrupt handling:
+ *	3) Parse in the slave information
+ *	4) Print the logged information.
+ *	5) Add dump stack to provide kernel trace.
+ *	6) Clear the source if known.
+ *
+ * This handles two types of errors:
+ *	1) Custom errors in L3 :
+ *		Target like DMM/FW/EMIF generates SRESP=ERR error
+ *	2) Standard L3 error:
+ *		- Unsupported CMD.
+ *			L3 tries to access target while it is idle
+ *		- OCP disconnect.
+ *		- Address hole error:
+ *			If DSS/ISS/FDIF/USBHOSTFS access a target where they
+ *			do not have connectivity, the error is logged in
+ *			their default target which is DMM2.
+ *
+ *	On High Secure devices, firewall errors are possible and those
+ *	can be trapped as well. But the trapping is implemented as part
+ *	secure software and hence need not be implemented here.
+ */
+static int l3_handle_target(struct omap_l3 *l3, void __iomem *base,
+			    struct l3_flagmux_data *flag_mux, int err_src)
+{
+	int k;
+	u32 std_err_main, clear, masterid;
+	u8 op_code, m_req_info;
+	void __iomem *l3_targ_base;
+	void __iomem *l3_targ_stderr, *l3_targ_slvofslsb, *l3_targ_mstaddr;
+	void __iomem *l3_targ_hdr, *l3_targ_info;
+	struct l3_target_data *l3_targ_inst;
+	struct l3_masters_data *master;
+	char *target_name, *master_name = "UN IDENTIFIED";
+	char *err_description;
+	char err_string[30] = { 0 };
+	char info_string[60] = { 0 };
+
+	/* We DONOT expect err_src to go out of bounds */
+	BUG_ON(err_src > MAX_CLKDM_TARGETS);
+
+	if (err_src < flag_mux->num_targ_data) {
+		l3_targ_inst = &flag_mux->l3_targ[err_src];
+		target_name = l3_targ_inst->name;
+		l3_targ_base = base + l3_targ_inst->offset;
+	} else {
+		target_name = L3_TARGET_NOT_SUPPORTED;
+	}
+
+	if (target_name == L3_TARGET_NOT_SUPPORTED)
+		return -ENODEV;
+
+	/* Read the stderrlog_main_source from clk domain */
+	l3_targ_stderr = l3_targ_base + L3_TARG_STDERRLOG_MAIN;
+	l3_targ_slvofslsb = l3_targ_base + L3_TARG_STDERRLOG_SLVOFSLSB;
+
+	std_err_main = readl_relaxed(l3_targ_stderr);
+
+	switch (std_err_main & CUSTOM_ERROR) {
+	case STANDARD_ERROR:
+		err_description = "Standard";
+		snprintf(err_string, sizeof(err_string),
+			 ": At Address: 0x%08X ",
+			 readl_relaxed(l3_targ_slvofslsb));
+
+		l3_targ_mstaddr = l3_targ_base + L3_TARG_STDERRLOG_MSTADDR;
+		l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_HDR;
+		l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_INFO;
+		break;
+
+	case CUSTOM_ERROR:
+		err_description = "Custom";
+
+		l3_targ_mstaddr = l3_targ_base +
+				  L3_TARG_STDERRLOG_CINFO_MSTADDR;
+		l3_targ_hdr = l3_targ_base + L3_TARG_STDERRLOG_CINFO_OPCODE;
+		l3_targ_info = l3_targ_base + L3_TARG_STDERRLOG_CINFO_INFO;
+		break;
+
+	default:
+		/* Nothing to be handled here as of now */
+		return 0;
+	}
+
+	/* STDERRLOG_MSTADDR Stores the NTTP master address. */
+	masterid = (readl_relaxed(l3_targ_mstaddr) &
+		    l3->mst_addr_mask) >> __ffs(l3->mst_addr_mask);
+
+	for (k = 0, master = l3->l3_masters; k < l3->num_masters;
+	     k++, master++) {
+		if (masterid == master->id) {
+			master_name = master->name;
+			break;
+		}
+	}
+
+	op_code = readl_relaxed(l3_targ_hdr) & 0x7;
+
+	m_req_info = readl_relaxed(l3_targ_info) & 0xF;
+	snprintf(info_string, sizeof(info_string),
+		 ": %s in %s mode during %s access",
+		 (m_req_info & BIT(0)) ? "Opcode Fetch" : "Data Access",
+		 (m_req_info & BIT(1)) ? "Supervisor" : "User",
+		 (m_req_info & BIT(3)) ? "Debug" : "Functional");
+
+	WARN(true,
+	     "%s:L3 %s Error: MASTER %s TARGET %s (%s)%s%s\n",
+	     dev_name(l3->dev),
+	     err_description,
+	     master_name, target_name,
+	     l3_transaction_type[op_code],
+	     err_string, info_string);
+
+	/* clear the std error log*/
+	clear = std_err_main | CLEAR_STDERR_LOG;
+	writel_relaxed(clear, l3_targ_stderr);
+
+	return 0;
+}
+
+/**
+ * l3_interrupt_handler() - interrupt handler for l3 events
+ * @irq:	irq number
+ * @_l3:	pointer to l3 structure
+ *
+ * Interrupt Handler for L3 error detection.
+ *	1) Identify the L3 clockdomain partition to which the error belongs to.
+ *	2) Identify the slave where the error information is logged
+ *	... handle the slave event..
+ *	7) if the slave is unknown, mask out the slave.
+ */
+static irqreturn_t l3_interrupt_handler(int irq, void *_l3)
+{
+	struct omap_l3 *l3 = _l3;
+	int inttype, i, ret;
+	int err_src = 0;
+	u32 err_reg, mask_val;
+	void __iomem *base, *mask_reg;
+	struct l3_flagmux_data *flag_mux;
+
+	/* Get the Type of interrupt */
+	inttype = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
+
+	for (i = 0; i < l3->num_modules; i++) {
+		/*
+		 * Read the regerr register of the clock domain
+		 * to determine the source
+		 */
+		base = l3->l3_base[i];
+		flag_mux = l3->l3_flagmux[i];
+		err_reg = readl_relaxed(base + flag_mux->offset +
+					L3_FLAGMUX_REGERR0 + (inttype << 3));
+
+		err_reg &= ~(inttype ? flag_mux->mask_app_bits :
+				flag_mux->mask_dbg_bits);
+
+		/* Get the corresponding error and analyse */
+		if (err_reg) {
+			/* Identify the source from control status register */
+			err_src = __ffs(err_reg);
+
+			ret = l3_handle_target(l3, base, flag_mux, err_src);
+
+			/*
+			 * Certain plaforms may have "undocumented" status
+			 * pending on boot. So dont generate a severe warning
+			 * here. Just mask it off to prevent the error from
+			 * reoccuring and locking up the system.
+			 */
+			if (ret) {
+				dev_err(l3->dev,
+					"L3 %s error: target %d mod:%d %s\n",
+					inttype ? "debug" : "application",
+					err_src, i, "(unclearable)");
+
+				mask_reg = base + flag_mux->offset +
+					   L3_FLAGMUX_MASK0 + (inttype << 3);
+				mask_val = readl_relaxed(mask_reg);
+				mask_val &= ~(1 << err_src);
+				writel_relaxed(mask_val, mask_reg);
+
+				/* Mark these bits as to be ignored */
+				if (inttype)
+					flag_mux->mask_app_bits |= 1 << err_src;
+				else
+					flag_mux->mask_dbg_bits |= 1 << err_src;
+			}
+
+			/* Error found so break the for loop */
+			return IRQ_HANDLED;
+		}
+	}
+
+	dev_err(l3->dev, "L3 %s IRQ not handled!!\n",
+		inttype ? "debug" : "application");
+
+	return IRQ_NONE;
+}
+
+static const struct of_device_id l3_noc_match[] = {
+	{.compatible = "ti,omap4-l3-noc", .data = &omap4_l3_data},
+	{.compatible = "ti,omap5-l3-noc", .data = &omap5_l3_data},
+	{.compatible = "ti,dra7-l3-noc", .data = &dra_l3_data},
+	{.compatible = "ti,am4372-l3-noc", .data = &am4372_l3_data},
+	{},
+};
+MODULE_DEVICE_TABLE(of, l3_noc_match);
+
+static int omap_l3_probe(struct platform_device *pdev)
+{
+	const struct of_device_id *of_id;
+	static struct omap_l3 *l3;
+	int ret, i, res_idx;
+
+	of_id = of_match_device(l3_noc_match, &pdev->dev);
+	if (!of_id) {
+		dev_err(&pdev->dev, "OF data missing\n");
+		return -EINVAL;
+	}
+
+	l3 = devm_kzalloc(&pdev->dev, sizeof(*l3), GFP_KERNEL);
+	if (!l3)
+		return -ENOMEM;
+
+	memcpy(l3, of_id->data, sizeof(*l3));
+	l3->dev = &pdev->dev;
+	platform_set_drvdata(pdev, l3);
+
+	/* Get mem resources */
+	for (i = 0, res_idx = 0; i < l3->num_modules; i++) {
+		struct resource	*res;
+
+		if (l3->l3_base[i] == L3_BASE_IS_SUBMODULE) {
+			/* First entry cannot be submodule */
+			BUG_ON(i == 0);
+			l3->l3_base[i] = l3->l3_base[i - 1];
+			continue;
+		}
+		res = platform_get_resource(pdev, IORESOURCE_MEM, res_idx);
+		l3->l3_base[i] = devm_ioremap_resource(&pdev->dev, res);
+		if (IS_ERR(l3->l3_base[i])) {
+			dev_err(l3->dev, "ioremap %d failed\n", i);
+			return PTR_ERR(l3->l3_base[i]);
+		}
+		res_idx++;
+	}
+
+	/*
+	 * Setup interrupt Handlers
+	 */
+	l3->debug_irq = platform_get_irq(pdev, 0);
+	ret = devm_request_irq(l3->dev, l3->debug_irq, l3_interrupt_handler,
+			       IRQF_NO_THREAD, "l3-dbg-irq", l3);
+	if (ret) {
+		dev_err(l3->dev, "request_irq failed for %d\n",
+			l3->debug_irq);
+		return ret;
+	}
+
+	l3->app_irq = platform_get_irq(pdev, 1);
+	ret = devm_request_irq(l3->dev, l3->app_irq, l3_interrupt_handler,
+			       IRQF_NO_THREAD, "l3-app-irq", l3);
+	if (ret)
+		dev_err(l3->dev, "request_irq failed for %d\n", l3->app_irq);
+
+	return ret;
+}
+
+#ifdef	CONFIG_PM_SLEEP
+
+/**
+ * l3_resume_noirq() - resume function for l3_noc
+ * @dev:	pointer to l3_noc device structure
+ *
+ * We only have the resume handler only since we
+ * have already maintained the delta register
+ * configuration as part of configuring the system
+ */
+static int l3_resume_noirq(struct device *dev)
+{
+	struct omap_l3 *l3 = dev_get_drvdata(dev);
+	int i;
+	struct l3_flagmux_data *flag_mux;
+	void __iomem *base, *mask_regx = NULL;
+	u32 mask_val;
+
+	for (i = 0; i < l3->num_modules; i++) {
+		base = l3->l3_base[i];
+		flag_mux = l3->l3_flagmux[i];
+		if (!flag_mux->mask_app_bits && !flag_mux->mask_dbg_bits)
+			continue;
+
+		mask_regx = base + flag_mux->offset + L3_FLAGMUX_MASK0 +
+			   (L3_APPLICATION_ERROR << 3);
+		mask_val = readl_relaxed(mask_regx);
+		mask_val &= ~(flag_mux->mask_app_bits);
+
+		writel_relaxed(mask_val, mask_regx);
+		mask_regx = base + flag_mux->offset + L3_FLAGMUX_MASK0 +
+			   (L3_DEBUG_ERROR << 3);
+		mask_val = readl_relaxed(mask_regx);
+		mask_val &= ~(flag_mux->mask_dbg_bits);
+
+		writel_relaxed(mask_val, mask_regx);
+	}
+
+	/* Dummy read to force OCP barrier */
+	if (mask_regx)
+		(void)readl(mask_regx);
+
+	return 0;
+}
+
+static const struct dev_pm_ops l3_dev_pm_ops = {
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(NULL, l3_resume_noirq)
+};
+
+#define L3_DEV_PM_OPS (&l3_dev_pm_ops)
+#else
+#define L3_DEV_PM_OPS NULL
+#endif
+
+static struct platform_driver omap_l3_driver = {
+	.probe		= omap_l3_probe,
+	.driver		= {
+		.name		= "omap_l3_noc",
+		.pm		= L3_DEV_PM_OPS,
+		.of_match_table = of_match_ptr(l3_noc_match),
+	},
+};
+
+static int __init omap_l3_init(void)
+{
+	return platform_driver_register(&omap_l3_driver);
+}
+postcore_initcall_sync(omap_l3_init);
+
+static void __exit omap_l3_exit(void)
+{
+	platform_driver_unregister(&omap_l3_driver);
+}
+module_exit(omap_l3_exit);
+
+MODULE_AUTHOR("Santosh Shilimkar");
+MODULE_AUTHOR("Sricharan R");
+MODULE_DESCRIPTION("OMAP L3 Interconnect error handling driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/omap_l3_noc.h b/drivers/bus/omap_l3_noc.h
new file mode 100644
index 000000000..73431f81d
--- /dev/null
+++ b/drivers/bus/omap_l3_noc.h
@@ -0,0 +1,501 @@
+/*
+ * OMAP L3 Interconnect  error handling driver header
+ *
+ * Copyright (C) 2011-2015 Texas Instruments Incorporated - http://www.ti.com/
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *	sricharan <r.sricharan@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#ifndef __OMAP_L3_NOC_H
+#define __OMAP_L3_NOC_H
+
+#define MAX_L3_MODULES			3
+#define MAX_CLKDM_TARGETS		31
+
+#define CLEAR_STDERR_LOG		(1 << 31)
+#define CUSTOM_ERROR			0x2
+#define STANDARD_ERROR			0x0
+#define INBAND_ERROR			0x0
+#define L3_APPLICATION_ERROR		0x0
+#define L3_DEBUG_ERROR			0x1
+
+/* L3 TARG register offsets */
+#define L3_TARG_STDERRLOG_MAIN		0x48
+#define L3_TARG_STDERRLOG_HDR		0x4c
+#define L3_TARG_STDERRLOG_MSTADDR	0x50
+#define L3_TARG_STDERRLOG_INFO		0x58
+#define L3_TARG_STDERRLOG_SLVOFSLSB	0x5c
+#define L3_TARG_STDERRLOG_CINFO_INFO	0x64
+#define L3_TARG_STDERRLOG_CINFO_MSTADDR	0x68
+#define L3_TARG_STDERRLOG_CINFO_OPCODE	0x6c
+#define L3_FLAGMUX_REGERR0		0xc
+#define L3_FLAGMUX_MASK0		0x8
+
+#define L3_TARGET_NOT_SUPPORTED		NULL
+
+#define L3_BASE_IS_SUBMODULE		((void __iomem *)(1 << 0))
+
+static const char * const l3_transaction_type[] = {
+	/* 0 0 0 */ "Idle",
+	/* 0 0 1 */ "Write",
+	/* 0 1 0 */ "Read",
+	/* 0 1 1 */ "ReadEx",
+	/* 1 0 0 */ "Read Link",
+	/* 1 0 1 */ "Write Non-Posted",
+	/* 1 1 0 */ "Write Conditional",
+	/* 1 1 1 */ "Write Broadcast",
+};
+
+/**
+ * struct l3_masters_data - L3 Master information
+ * @id:		ID of the L3 Master
+ * @name:	master name
+ */
+struct l3_masters_data {
+	u32 id;
+	char *name;
+};
+
+/**
+ * struct l3_target_data - L3 Target information
+ * @offset:	Offset from base for L3 Target
+ * @name:	Target name
+ *
+ * Target information is organized indexed by bit field definitions.
+ */
+struct l3_target_data {
+	u32 offset;
+	char *name;
+};
+
+/**
+ * struct l3_flagmux_data - Flag Mux information
+ * @offset:	offset from base for flagmux register
+ * @l3_targ:	array indexed by flagmux index (bit offset) pointing to the
+ *		target data. unsupported ones are marked with
+ *		L3_TARGET_NOT_SUPPORTED
+ * @num_targ_data: number of entries in target data
+ * @mask_app_bits: ignore these from raw application irq status
+ * @mask_dbg_bits: ignore these from raw debug irq status
+ */
+struct l3_flagmux_data {
+	u32 offset;
+	struct l3_target_data *l3_targ;
+	u8 num_targ_data;
+	u32 mask_app_bits;
+	u32 mask_dbg_bits;
+};
+
+
+/**
+ * struct omap_l3 - Description of data relevant for L3 bus.
+ * @dev:	device representing the bus (populated runtime)
+ * @l3_base:	base addresses of modules (populated runtime if 0)
+ *		if set to L3_BASE_IS_SUBMODULE, then uses previous
+ *		module index as the base address
+ * @l3_flag_mux: array containing flag mux data per module
+ *		 offset from corresponding module base indexed per
+ *		 module.
+ * @num_modules: number of clock domains / modules.
+ * @l3_masters:	array pointing to master data containing name and register
+ *		offset for the master.
+ * @num_master: number of masters
+ * @mst_addr_mask: Mask representing MSTADDR information of NTTP packet
+ * @debug_irq:	irq number of the debug interrupt (populated runtime)
+ * @app_irq:	irq number of the application interrupt (populated runtime)
+ */
+struct omap_l3 {
+	struct device *dev;
+
+	void __iomem *l3_base[MAX_L3_MODULES];
+	struct l3_flagmux_data **l3_flagmux;
+	int num_modules;
+
+	struct l3_masters_data *l3_masters;
+	int num_masters;
+	u32 mst_addr_mask;
+
+	int debug_irq;
+	int app_irq;
+};
+
+static struct l3_target_data omap_l3_target_data_clk1[] = {
+	{0x100,	"DMM1",},
+	{0x200,	"DMM2",},
+	{0x300,	"ABE",},
+	{0x400,	"L4CFG",},
+	{0x600,	"CLK2PWRDISC",},
+	{0x0,	"HOSTCLK1",},
+	{0x900,	"L4WAKEUP",},
+};
+
+static struct l3_flagmux_data omap_l3_flagmux_clk1 = {
+	.offset = 0x500,
+	.l3_targ = omap_l3_target_data_clk1,
+	.num_targ_data = ARRAY_SIZE(omap_l3_target_data_clk1),
+};
+
+
+static struct l3_target_data omap_l3_target_data_clk2[] = {
+	{0x500,	"CORTEXM3",},
+	{0x300,	"DSS",},
+	{0x100,	"GPMC",},
+	{0x400,	"ISS",},
+	{0x700,	"IVAHD",},
+	{0xD00,	"AES1",},
+	{0x900,	"L4PER0",},
+	{0x200,	"OCMRAM",},
+	{0x100,	"GPMCsERROR",},
+	{0x600,	"SGX",},
+	{0x800,	"SL2",},
+	{0x1600, "C2C",},
+	{0x1100, "PWRDISCCLK1",},
+	{0xF00,	"SHA1",},
+	{0xE00,	"AES2",},
+	{0xC00,	"L4PER3",},
+	{0xA00,	"L4PER1",},
+	{0xB00,	"L4PER2",},
+	{0x0,	"HOSTCLK2",},
+	{0x1800, "CAL",},
+	{0x1700, "LLI",},
+};
+
+static struct l3_flagmux_data omap_l3_flagmux_clk2 = {
+	.offset = 0x1000,
+	.l3_targ = omap_l3_target_data_clk2,
+	.num_targ_data = ARRAY_SIZE(omap_l3_target_data_clk2),
+};
+
+
+static struct l3_target_data omap4_l3_target_data_clk3[] = {
+	{0x0100, "DEBUGSS",},
+};
+
+static struct l3_flagmux_data omap4_l3_flagmux_clk3 = {
+	.offset = 0x0200,
+	.l3_targ = omap4_l3_target_data_clk3,
+	.num_targ_data = ARRAY_SIZE(omap4_l3_target_data_clk3),
+};
+
+static struct l3_masters_data omap_l3_masters[] = {
+	{ 0x00, "MPU"},
+	{ 0x04, "CS_ADP"},
+	{ 0x05, "xxx"},
+	{ 0x08, "DSP"},
+	{ 0x0C, "IVAHD"},
+	{ 0x10, "ISS"},
+	{ 0x11, "DucatiM3"},
+	{ 0x12, "FaceDetect"},
+	{ 0x14, "SDMA_Rd"},
+	{ 0x15, "SDMA_Wr"},
+	{ 0x16, "xxx"},
+	{ 0x17, "xxx"},
+	{ 0x18, "SGX"},
+	{ 0x1C, "DSS"},
+	{ 0x20, "C2C"},
+	{ 0x22, "xxx"},
+	{ 0x23, "xxx"},
+	{ 0x24, "HSI"},
+	{ 0x28, "MMC1"},
+	{ 0x29, "MMC2"},
+	{ 0x2A, "MMC6"},
+	{ 0x2C, "UNIPRO1"},
+	{ 0x30, "USBHOSTHS"},
+	{ 0x31, "USBOTGHS"},
+	{ 0x32, "USBHOSTFS"}
+};
+
+static struct l3_flagmux_data *omap4_l3_flagmux[] = {
+	&omap_l3_flagmux_clk1,
+	&omap_l3_flagmux_clk2,
+	&omap4_l3_flagmux_clk3,
+};
+
+static const struct omap_l3 omap4_l3_data = {
+	.l3_flagmux = omap4_l3_flagmux,
+	.num_modules = ARRAY_SIZE(omap4_l3_flagmux),
+	.l3_masters = omap_l3_masters,
+	.num_masters = ARRAY_SIZE(omap_l3_masters),
+	/* The 6 MSBs of register field used to distinguish initiator */
+	.mst_addr_mask = 0xFC,
+};
+
+/* OMAP5 data */
+static struct l3_target_data omap5_l3_target_data_clk3[] = {
+	{0x0100, "L3INSTR",},
+	{0x0300, "DEBUGSS",},
+	{0x0,	 "HOSTCLK3",},
+};
+
+static struct l3_flagmux_data omap5_l3_flagmux_clk3 = {
+	.offset = 0x0200,
+	.l3_targ = omap5_l3_target_data_clk3,
+	.num_targ_data = ARRAY_SIZE(omap5_l3_target_data_clk3),
+};
+
+static struct l3_flagmux_data *omap5_l3_flagmux[] = {
+	&omap_l3_flagmux_clk1,
+	&omap_l3_flagmux_clk2,
+	&omap5_l3_flagmux_clk3,
+};
+
+static const struct omap_l3 omap5_l3_data = {
+	.l3_flagmux = omap5_l3_flagmux,
+	.num_modules = ARRAY_SIZE(omap5_l3_flagmux),
+	.l3_masters = omap_l3_masters,
+	.num_masters = ARRAY_SIZE(omap_l3_masters),
+	/* The 6 MSBs of register field used to distinguish initiator */
+	.mst_addr_mask = 0x7E0,
+};
+
+/* DRA7 data */
+static struct l3_target_data dra_l3_target_data_clk1[] = {
+	{0x2a00, "AES1",},
+	{0x0200, "DMM_P1",},
+	{0x0600, "DSP2_SDMA",},
+	{0x0b00, "EVE2",},
+	{0x1300, "DMM_P2",},
+	{0x2c00, "AES2",},
+	{0x0300, "DSP1_SDMA",},
+	{0x0a00, "EVE1",},
+	{0x0c00, "EVE3",},
+	{0x0d00, "EVE4",},
+	{0x2900, "DSS",},
+	{0x0100, "GPMC",},
+	{0x3700, "PCIE1",},
+	{0x1600, "IVA_CONFIG",},
+	{0x1800, "IVA_SL2IF",},
+	{0x0500, "L4_CFG",},
+	{0x1d00, "L4_WKUP",},
+	{0x3800, "PCIE2",},
+	{0x3300, "SHA2_1",},
+	{0x1200, "GPU",},
+	{0x1000, "IPU1",},
+	{0x1100, "IPU2",},
+	{0x2000, "TPCC_EDMA",},
+	{0x2e00, "TPTC1_EDMA",},
+	{0x2b00, "TPTC2_EDMA",},
+	{0x0700, "VCP1",},
+	{0x2500, "L4_PER2_P3",},
+	{0x0e00, "L4_PER3_P3",},
+	{0x2200, "MMU1",},
+	{0x1400, "PRUSS1",},
+	{0x1500, "PRUSS2"},
+	{0x0800, "VCP1",},
+};
+
+static struct l3_flagmux_data dra_l3_flagmux_clk1 = {
+	.offset = 0x803500,
+	.l3_targ = dra_l3_target_data_clk1,
+	.num_targ_data = ARRAY_SIZE(dra_l3_target_data_clk1),
+};
+
+static struct l3_target_data dra_l3_target_data_clk2[] = {
+	{0x0,	"HOST CLK1",},
+	{0x800000, "HOST CLK2",},
+	{0xdead, L3_TARGET_NOT_SUPPORTED,},
+	{0x3400, "SHA2_2",},
+	{0x0900, "BB2D",},
+	{0xdead, L3_TARGET_NOT_SUPPORTED,},
+	{0x2100, "L4_PER1_P3",},
+	{0x1c00, "L4_PER1_P1",},
+	{0x1f00, "L4_PER1_P2",},
+	{0x2300, "L4_PER2_P1",},
+	{0x2400, "L4_PER2_P2",},
+	{0x2600, "L4_PER3_P1",},
+	{0x2700, "L4_PER3_P2",},
+	{0x2f00, "MCASP1",},
+	{0x3000, "MCASP2",},
+	{0x3100, "MCASP3",},
+	{0x2800, "MMU2",},
+	{0x0f00, "OCMC_RAM1",},
+	{0x1700, "OCMC_RAM2",},
+	{0x1900, "OCMC_RAM3",},
+	{0x1e00, "OCMC_ROM",},
+	{0x3900, "QSPI",},
+};
+
+static struct l3_flagmux_data dra_l3_flagmux_clk2 = {
+	.offset = 0x803600,
+	.l3_targ = dra_l3_target_data_clk2,
+	.num_targ_data = ARRAY_SIZE(dra_l3_target_data_clk2),
+};
+
+static struct l3_target_data dra_l3_target_data_clk3[] = {
+	{0x0100, "L3_INSTR"},
+	{0x0300, "DEBUGSS_CT_TBR"},
+	{0x0,	 "HOST CLK3"},
+};
+
+static struct l3_flagmux_data dra_l3_flagmux_clk3 = {
+	.offset = 0x200,
+	.l3_targ = dra_l3_target_data_clk3,
+	.num_targ_data = ARRAY_SIZE(dra_l3_target_data_clk3),
+};
+
+static struct l3_masters_data dra_l3_masters[] = {
+	{ 0x0, "MPU" },
+	{ 0x4, "CS_DAP" },
+	{ 0x5, "IEEE1500_2_OCP" },
+	{ 0x8, "DSP1_MDMA" },
+	{ 0x9, "DSP1_CFG" },
+	{ 0xA, "DSP1_DMA" },
+	{ 0xB, "DSP2_MDMA" },
+	{ 0xC, "DSP2_CFG" },
+	{ 0xD, "DSP2_DMA" },
+	{ 0xE, "IVA" },
+	{ 0x10, "EVE1_P1" },
+	{ 0x11, "EVE2_P1" },
+	{ 0x12, "EVE3_P1" },
+	{ 0x13, "EVE4_P1" },
+	{ 0x14, "PRUSS1 PRU1" },
+	{ 0x15, "PRUSS1 PRU2" },
+	{ 0x16, "PRUSS2 PRU1" },
+	{ 0x17, "PRUSS2 PRU2" },
+	{ 0x18, "IPU1" },
+	{ 0x19, "IPU2" },
+	{ 0x1A, "SDMA" },
+	{ 0x1B, "CDMA" },
+	{ 0x1C, "TC1_EDMA" },
+	{ 0x1D, "TC2_EDMA" },
+	{ 0x20, "DSS" },
+	{ 0x21, "MMU1" },
+	{ 0x22, "PCIE1" },
+	{ 0x23, "MMU2" },
+	{ 0x24, "VIP1" },
+	{ 0x25, "VIP2" },
+	{ 0x26, "VIP3" },
+	{ 0x27, "VPE" },
+	{ 0x28, "GPU_P1" },
+	{ 0x29, "BB2D" },
+	{ 0x29, "GPU_P2" },
+	{ 0x2B, "GMAC_SW" },
+	{ 0x2C, "USB3" },
+	{ 0x2D, "USB2_SS" },
+	{ 0x2E, "USB2_ULPI_SS1" },
+	{ 0x2F, "USB2_ULPI_SS2" },
+	{ 0x30, "CSI2_1" },
+	{ 0x31, "CSI2_2" },
+	{ 0x33, "SATA" },
+	{ 0x34, "EVE1_P2" },
+	{ 0x35, "EVE2_P2" },
+	{ 0x36, "EVE3_P2" },
+	{ 0x37, "EVE4_P2" }
+};
+
+static struct l3_flagmux_data *dra_l3_flagmux[] = {
+	&dra_l3_flagmux_clk1,
+	&dra_l3_flagmux_clk2,
+	&dra_l3_flagmux_clk3,
+};
+
+static const struct omap_l3 dra_l3_data = {
+	.l3_base = { [1] = L3_BASE_IS_SUBMODULE },
+	.l3_flagmux = dra_l3_flagmux,
+	.num_modules = ARRAY_SIZE(dra_l3_flagmux),
+	.l3_masters = dra_l3_masters,
+	.num_masters = ARRAY_SIZE(dra_l3_masters),
+	/* The 6 MSBs of register field used to distinguish initiator */
+	.mst_addr_mask = 0xFC,
+};
+
+/* AM4372 data */
+static struct l3_target_data am4372_l3_target_data_200f[] = {
+	{0xf00,  "EMIF",},
+	{0x1200, "DES",},
+	{0x400,  "OCMCRAM",},
+	{0x700,  "TPTC0",},
+	{0x800,  "TPTC1",},
+	{0x900,  "TPTC2"},
+	{0xb00,  "TPCC",},
+	{0xd00,  "DEBUGSS",},
+	{0xdead, L3_TARGET_NOT_SUPPORTED,},
+	{0x200,  "SHA",},
+	{0xc00,  "SGX530",},
+	{0x500,  "AES0",},
+	{0xa00,  "L4_FAST",},
+	{0x300,  "MPUSS_L2_RAM",},
+	{0x100,  "ICSS",},
+};
+
+static struct l3_flagmux_data am4372_l3_flagmux_200f = {
+	.offset = 0x1000,
+	.l3_targ = am4372_l3_target_data_200f,
+	.num_targ_data = ARRAY_SIZE(am4372_l3_target_data_200f),
+};
+
+static struct l3_target_data am4372_l3_target_data_100s[] = {
+	{0x100, "L4_PER_0",},
+	{0x200, "L4_PER_1",},
+	{0x300, "L4_PER_2",},
+	{0x400, "L4_PER_3",},
+	{0x800, "McASP0",},
+	{0x900, "McASP1",},
+	{0xC00, "MMCHS2",},
+	{0x700, "GPMC",},
+	{0xD00, "L4_FW",},
+	{0xdead, L3_TARGET_NOT_SUPPORTED,},
+	{0x500, "ADCTSC",},
+	{0xE00, "L4_WKUP",},
+	{0xA00, "MAG_CARD",},
+};
+
+static struct l3_flagmux_data am4372_l3_flagmux_100s = {
+	.offset = 0x600,
+	.l3_targ = am4372_l3_target_data_100s,
+	.num_targ_data = ARRAY_SIZE(am4372_l3_target_data_100s),
+};
+
+static struct l3_masters_data am4372_l3_masters[] = {
+	{ 0x0, "M1 (128-bit)"},
+	{ 0x1, "M2 (64-bit)"},
+	{ 0x4, "DAP"},
+	{ 0x5, "P1500"},
+	{ 0xC, "ICSS0"},
+	{ 0xD, "ICSS1"},
+	{ 0x14, "Wakeup Processor"},
+	{ 0x18, "TPTC0 Read"},
+	{ 0x19, "TPTC0 Write"},
+	{ 0x1A, "TPTC1 Read"},
+	{ 0x1B, "TPTC1 Write"},
+	{ 0x1C, "TPTC2 Read"},
+	{ 0x1D, "TPTC2 Write"},
+	{ 0x20, "SGX530"},
+	{ 0x21, "OCP WP Traffic Probe"},
+	{ 0x22, "OCP WP DMA Profiling"},
+	{ 0x23, "OCP WP Event Trace"},
+	{ 0x25, "DSS"},
+	{ 0x28, "Crypto DMA RD"},
+	{ 0x29, "Crypto DMA WR"},
+	{ 0x2C, "VPFE0"},
+	{ 0x2D, "VPFE1"},
+	{ 0x30, "GEMAC"},
+	{ 0x34, "USB0 RD"},
+	{ 0x35, "USB0 WR"},
+	{ 0x36, "USB1 RD"},
+	{ 0x37, "USB1 WR"},
+};
+
+static struct l3_flagmux_data *am4372_l3_flagmux[] = {
+	&am4372_l3_flagmux_200f,
+	&am4372_l3_flagmux_100s,
+};
+
+static const struct omap_l3 am4372_l3_data = {
+	.l3_flagmux = am4372_l3_flagmux,
+	.num_modules = ARRAY_SIZE(am4372_l3_flagmux),
+	.l3_masters = am4372_l3_masters,
+	.num_masters = ARRAY_SIZE(am4372_l3_masters),
+	/* All 6 bits of register field used to distinguish initiator */
+	.mst_addr_mask = 0x3F,
+};
+
+#endif	/* __OMAP_L3_NOC_H */
diff --git a/drivers/bus/omap_l3_smx.c b/drivers/bus/omap_l3_smx.c
new file mode 100644
index 000000000..b853a7295
--- /dev/null
+++ b/drivers/bus/omap_l3_smx.c
@@ -0,0 +1,317 @@
+/*
+ * OMAP3XXX L3 Interconnect Driver
+ *
+ * Copyright (C) 2011 Texas Corporation
+ *	Felipe Balbi <balbi@ti.com>
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *	Sricharan <r.sricharan@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+#include "omap_l3_smx.h"
+
+static inline u64 omap3_l3_readll(void __iomem *base, u16 reg)
+{
+	return __raw_readll(base + reg);
+}
+
+static inline void omap3_l3_writell(void __iomem *base, u16 reg, u64 value)
+{
+	__raw_writell(value, base + reg);
+}
+
+static inline enum omap3_l3_code omap3_l3_decode_error_code(u64 error)
+{
+	return (error & 0x0f000000) >> L3_ERROR_LOG_CODE;
+}
+
+static inline u32 omap3_l3_decode_addr(u64 error_addr)
+{
+	return error_addr & 0xffffffff;
+}
+
+static inline unsigned omap3_l3_decode_cmd(u64 error)
+{
+	return (error & 0x07) >> L3_ERROR_LOG_CMD;
+}
+
+static inline enum omap3_l3_initiator_id omap3_l3_decode_initid(u64 error)
+{
+	return (error & 0xff00) >> L3_ERROR_LOG_INITID;
+}
+
+static inline unsigned omap3_l3_decode_req_info(u64 error)
+{
+	return (error >> 32) & 0xffff;
+}
+
+static char *omap3_l3_code_string(u8 code)
+{
+	switch (code) {
+	case OMAP_L3_CODE_NOERROR:
+		return "No Error";
+	case OMAP_L3_CODE_UNSUP_CMD:
+		return "Unsupported Command";
+	case OMAP_L3_CODE_ADDR_HOLE:
+		return "Address Hole";
+	case OMAP_L3_CODE_PROTECT_VIOLATION:
+		return "Protection Violation";
+	case OMAP_L3_CODE_IN_BAND_ERR:
+		return "In-band Error";
+	case OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT:
+		return "Request Timeout Not Accepted";
+	case OMAP_L3_CODE_REQ_TOUT_NO_RESP:
+		return "Request Timeout, no response";
+	default:
+		return "UNKNOWN error";
+	}
+}
+
+static char *omap3_l3_initiator_string(u8 initid)
+{
+	switch (initid) {
+	case OMAP_L3_LCD:
+		return "LCD";
+	case OMAP_L3_SAD2D:
+		return "SAD2D";
+	case OMAP_L3_IA_MPU_SS_1:
+	case OMAP_L3_IA_MPU_SS_2:
+	case OMAP_L3_IA_MPU_SS_3:
+	case OMAP_L3_IA_MPU_SS_4:
+	case OMAP_L3_IA_MPU_SS_5:
+		return "MPU";
+	case OMAP_L3_IA_IVA_SS_1:
+	case OMAP_L3_IA_IVA_SS_2:
+	case OMAP_L3_IA_IVA_SS_3:
+		return "IVA_SS";
+	case OMAP_L3_IA_IVA_SS_DMA_1:
+	case OMAP_L3_IA_IVA_SS_DMA_2:
+	case OMAP_L3_IA_IVA_SS_DMA_3:
+	case OMAP_L3_IA_IVA_SS_DMA_4:
+	case OMAP_L3_IA_IVA_SS_DMA_5:
+	case OMAP_L3_IA_IVA_SS_DMA_6:
+		return "IVA_SS_DMA";
+	case OMAP_L3_IA_SGX:
+		return "SGX";
+	case OMAP_L3_IA_CAM_1:
+	case OMAP_L3_IA_CAM_2:
+	case OMAP_L3_IA_CAM_3:
+		return "CAM";
+	case OMAP_L3_IA_DAP:
+		return "DAP";
+	case OMAP_L3_SDMA_WR_1:
+	case OMAP_L3_SDMA_WR_2:
+		return "SDMA_WR";
+	case OMAP_L3_SDMA_RD_1:
+	case OMAP_L3_SDMA_RD_2:
+	case OMAP_L3_SDMA_RD_3:
+	case OMAP_L3_SDMA_RD_4:
+		return "SDMA_RD";
+	case OMAP_L3_USBOTG:
+		return "USB_OTG";
+	case OMAP_L3_USBHOST:
+		return "USB_HOST";
+	default:
+		return "UNKNOWN Initiator";
+	}
+}
+
+/*
+ * omap3_l3_block_irq - handles a register block's irq
+ * @l3: struct omap3_l3 *
+ * @base: register block base address
+ * @error: L3_ERROR_LOG register of our block
+ *
+ * Called in hard-irq context. Caller should take care of locking
+ *
+ * OMAP36xx TRM gives, on page 2001, Figure 9-10, the Typical Error
+ * Analysis Sequence, we are following that sequence here, please
+ * refer to that Figure for more information on the subject.
+ */
+static irqreturn_t omap3_l3_block_irq(struct omap3_l3 *l3,
+					u64 error, int error_addr)
+{
+	u8 code = omap3_l3_decode_error_code(error);
+	u8 initid = omap3_l3_decode_initid(error);
+	u8 multi = error & L3_ERROR_LOG_MULTI;
+	u32 address = omap3_l3_decode_addr(error_addr);
+
+	pr_err("%s seen by %s %s at address %x\n",
+			omap3_l3_code_string(code),
+			omap3_l3_initiator_string(initid),
+			multi ? "Multiple Errors" : "", address);
+	WARN_ON(1);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t omap3_l3_app_irq(int irq, void *_l3)
+{
+	struct omap3_l3 *l3 = _l3;
+	u64 status, clear;
+	u64 error;
+	u64 error_addr;
+	u64 err_source = 0;
+	void __iomem *base;
+	int int_type;
+	irqreturn_t ret = IRQ_NONE;
+
+	int_type = irq == l3->app_irq ? L3_APPLICATION_ERROR : L3_DEBUG_ERROR;
+	if (!int_type) {
+		status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_0);
+		/*
+		 * if we have a timeout error, there's nothing we can
+		 * do besides rebooting the board. So let's BUG on any
+		 * of such errors and handle the others. timeout error
+		 * is severe and not expected to occur.
+		 */
+		BUG_ON(status & L3_STATUS_0_TIMEOUT_MASK);
+	} else {
+		status = omap3_l3_readll(l3->rt, L3_SI_FLAG_STATUS_1);
+		/* No timeout error for debug sources */
+	}
+
+	/* identify the error source */
+	err_source = __ffs(status);
+
+	base = l3->rt + omap3_l3_bases[int_type][err_source];
+	error = omap3_l3_readll(base, L3_ERROR_LOG);
+	if (error) {
+		error_addr = omap3_l3_readll(base, L3_ERROR_LOG_ADDR);
+		ret |= omap3_l3_block_irq(l3, error, error_addr);
+	}
+
+	/* Clear the status register */
+	clear = (L3_AGENT_STATUS_CLEAR_IA << int_type) |
+		L3_AGENT_STATUS_CLEAR_TA;
+	omap3_l3_writell(base, L3_AGENT_STATUS, clear);
+
+	/* clear the error log register */
+	omap3_l3_writell(base, L3_ERROR_LOG, error);
+
+	return ret;
+}
+
+#if IS_BUILTIN(CONFIG_OF)
+static const struct of_device_id omap3_l3_match[] = {
+	{
+		.compatible = "ti,omap3-l3-smx",
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, omap3_l3_match);
+#endif
+
+static int omap3_l3_probe(struct platform_device *pdev)
+{
+	struct omap3_l3 *l3;
+	struct resource *res;
+	int ret;
+
+	l3 = kzalloc(sizeof(*l3), GFP_KERNEL);
+	if (!l3)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, l3);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "couldn't find resource\n");
+		ret = -ENODEV;
+		goto err0;
+	}
+	l3->rt = ioremap(res->start, resource_size(res));
+	if (!l3->rt) {
+		dev_err(&pdev->dev, "ioremap failed\n");
+		ret = -ENOMEM;
+		goto err0;
+	}
+
+	l3->debug_irq = platform_get_irq(pdev, 0);
+	ret = request_irq(l3->debug_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING,
+			  "l3-debug-irq", l3);
+	if (ret) {
+		dev_err(&pdev->dev, "couldn't request debug irq\n");
+		goto err1;
+	}
+
+	l3->app_irq = platform_get_irq(pdev, 1);
+	ret = request_irq(l3->app_irq, omap3_l3_app_irq, IRQF_TRIGGER_RISING,
+			  "l3-app-irq", l3);
+	if (ret) {
+		dev_err(&pdev->dev, "couldn't request app irq\n");
+		goto err2;
+	}
+
+	return 0;
+
+err2:
+	free_irq(l3->debug_irq, l3);
+err1:
+	iounmap(l3->rt);
+err0:
+	kfree(l3);
+	return ret;
+}
+
+static int omap3_l3_remove(struct platform_device *pdev)
+{
+	struct omap3_l3         *l3 = platform_get_drvdata(pdev);
+
+	free_irq(l3->app_irq, l3);
+	free_irq(l3->debug_irq, l3);
+	iounmap(l3->rt);
+	kfree(l3);
+
+	return 0;
+}
+
+static struct platform_driver omap3_l3_driver = {
+	.probe		= omap3_l3_probe,
+	.remove         = omap3_l3_remove,
+	.driver         = {
+		.name   = "omap_l3_smx",
+		.of_match_table = of_match_ptr(omap3_l3_match),
+	},
+};
+
+static int __init omap3_l3_init(void)
+{
+	return platform_driver_register(&omap3_l3_driver);
+}
+postcore_initcall_sync(omap3_l3_init);
+
+static void __exit omap3_l3_exit(void)
+{
+	platform_driver_unregister(&omap3_l3_driver);
+}
+module_exit(omap3_l3_exit);
+
+MODULE_AUTHOR("Felipe Balbi");
+MODULE_AUTHOR("Santosh Shilimkar");
+MODULE_AUTHOR("Sricharan R");
+MODULE_DESCRIPTION("OMAP3XXX L3 Interconnect Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/bus/omap_l3_smx.h b/drivers/bus/omap_l3_smx.h
new file mode 100644
index 000000000..4f3cebca4
--- /dev/null
+++ b/drivers/bus/omap_l3_smx.h
@@ -0,0 +1,338 @@
+/*
+ * OMAP3XXX L3 Interconnect Driver header
+ *
+ * Copyright (C) 2011 Texas Corporation
+ *	Felipe Balbi <balbi@ti.com>
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *	sricharan <r.sricharan@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+#ifndef __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
+#define __ARCH_ARM_MACH_OMAP2_L3_INTERCONNECT_3XXX_H
+
+/* Register definitions. All 64-bit wide */
+#define L3_COMPONENT			0x000
+#define L3_CORE				0x018
+#define L3_AGENT_CONTROL		0x020
+#define L3_AGENT_STATUS			0x028
+#define L3_ERROR_LOG			0x058
+
+#define L3_ERROR_LOG_MULTI		(1 << 31)
+#define L3_ERROR_LOG_SECONDARY		(1 << 30)
+
+#define L3_ERROR_LOG_ADDR		0x060
+
+/* Register definitions for Sideband Interconnect */
+#define L3_SI_CONTROL			0x020
+#define L3_SI_FLAG_STATUS_0		0x510
+
+static const u64 shift = 1;
+
+#define L3_STATUS_0_MPUIA_BRST		(shift << 0)
+#define L3_STATUS_0_MPUIA_RSP		(shift << 1)
+#define L3_STATUS_0_MPUIA_INBAND	(shift << 2)
+#define L3_STATUS_0_IVAIA_BRST		(shift << 6)
+#define L3_STATUS_0_IVAIA_RSP		(shift << 7)
+#define L3_STATUS_0_IVAIA_INBAND	(shift << 8)
+#define L3_STATUS_0_SGXIA_BRST		(shift << 9)
+#define L3_STATUS_0_SGXIA_RSP		(shift << 10)
+#define L3_STATUS_0_SGXIA_MERROR	(shift << 11)
+#define L3_STATUS_0_CAMIA_BRST		(shift << 12)
+#define L3_STATUS_0_CAMIA_RSP		(shift << 13)
+#define L3_STATUS_0_CAMIA_INBAND	(shift << 14)
+#define L3_STATUS_0_DISPIA_BRST		(shift << 15)
+#define L3_STATUS_0_DISPIA_RSP		(shift << 16)
+#define L3_STATUS_0_DMARDIA_BRST	(shift << 18)
+#define L3_STATUS_0_DMARDIA_RSP		(shift << 19)
+#define L3_STATUS_0_DMAWRIA_BRST	(shift << 21)
+#define L3_STATUS_0_DMAWRIA_RSP		(shift << 22)
+#define L3_STATUS_0_USBOTGIA_BRST	(shift << 24)
+#define L3_STATUS_0_USBOTGIA_RSP	(shift << 25)
+#define L3_STATUS_0_USBOTGIA_INBAND	(shift << 26)
+#define L3_STATUS_0_USBHOSTIA_BRST	(shift << 27)
+#define L3_STATUS_0_USBHOSTIA_INBAND	(shift << 28)
+#define L3_STATUS_0_SMSTA_REQ		(shift << 48)
+#define L3_STATUS_0_GPMCTA_REQ		(shift << 49)
+#define L3_STATUS_0_OCMRAMTA_REQ	(shift << 50)
+#define L3_STATUS_0_OCMROMTA_REQ	(shift << 51)
+#define L3_STATUS_0_IVATA_REQ		(shift << 54)
+#define L3_STATUS_0_SGXTA_REQ		(shift << 55)
+#define L3_STATUS_0_SGXTA_SERROR	(shift << 56)
+#define L3_STATUS_0_GPMCTA_SERROR	(shift << 57)
+#define L3_STATUS_0_L4CORETA_REQ	(shift << 58)
+#define L3_STATUS_0_L4PERTA_REQ		(shift << 59)
+#define L3_STATUS_0_L4EMUTA_REQ		(shift << 60)
+#define L3_STATUS_0_MAD2DTA_REQ		(shift << 61)
+
+#define L3_STATUS_0_TIMEOUT_MASK	(L3_STATUS_0_MPUIA_BRST		\
+					| L3_STATUS_0_MPUIA_RSP		\
+					| L3_STATUS_0_IVAIA_BRST	\
+					| L3_STATUS_0_IVAIA_RSP		\
+					| L3_STATUS_0_SGXIA_BRST	\
+					| L3_STATUS_0_SGXIA_RSP		\
+					| L3_STATUS_0_CAMIA_BRST	\
+					| L3_STATUS_0_CAMIA_RSP		\
+					| L3_STATUS_0_DISPIA_BRST	\
+					| L3_STATUS_0_DISPIA_RSP	\
+					| L3_STATUS_0_DMARDIA_BRST	\
+					| L3_STATUS_0_DMARDIA_RSP	\
+					| L3_STATUS_0_DMAWRIA_BRST	\
+					| L3_STATUS_0_DMAWRIA_RSP	\
+					| L3_STATUS_0_USBOTGIA_BRST	\
+					| L3_STATUS_0_USBOTGIA_RSP	\
+					| L3_STATUS_0_USBHOSTIA_BRST	\
+					| L3_STATUS_0_SMSTA_REQ		\
+					| L3_STATUS_0_GPMCTA_REQ	\
+					| L3_STATUS_0_OCMRAMTA_REQ	\
+					| L3_STATUS_0_OCMROMTA_REQ	\
+					| L3_STATUS_0_IVATA_REQ		\
+					| L3_STATUS_0_SGXTA_REQ		\
+					| L3_STATUS_0_L4CORETA_REQ	\
+					| L3_STATUS_0_L4PERTA_REQ	\
+					| L3_STATUS_0_L4EMUTA_REQ	\
+					| L3_STATUS_0_MAD2DTA_REQ)
+
+#define L3_SI_FLAG_STATUS_1		0x530
+
+#define L3_STATUS_1_MPU_DATAIA		(1 << 0)
+#define L3_STATUS_1_DAPIA0		(1 << 3)
+#define L3_STATUS_1_DAPIA1		(1 << 4)
+#define L3_STATUS_1_IVAIA		(1 << 6)
+
+#define L3_PM_ERROR_LOG			0x020
+#define L3_PM_CONTROL			0x028
+#define L3_PM_ERROR_CLEAR_SINGLE	0x030
+#define L3_PM_ERROR_CLEAR_MULTI		0x038
+#define L3_PM_REQ_INFO_PERMISSION(n)	(0x048 + (0x020 * n))
+#define L3_PM_READ_PERMISSION(n)	(0x050 + (0x020 * n))
+#define L3_PM_WRITE_PERMISSION(n)	(0x058 + (0x020 * n))
+#define L3_PM_ADDR_MATCH(n)		(0x060 + (0x020 * n))
+
+/* L3 error log bit fields. Common for IA and TA */
+#define L3_ERROR_LOG_CODE		24
+#define L3_ERROR_LOG_INITID		8
+#define L3_ERROR_LOG_CMD		0
+
+/* L3 agent status bit fields. */
+#define L3_AGENT_STATUS_CLEAR_IA	0x10000000
+#define L3_AGENT_STATUS_CLEAR_TA	0x01000000
+
+#define OMAP34xx_IRQ_L3_APP		10
+#define L3_APPLICATION_ERROR		0x0
+#define L3_DEBUG_ERROR			0x1
+
+enum omap3_l3_initiator_id {
+	/* LCD has 1 ID */
+	OMAP_L3_LCD = 29,
+	/* SAD2D has 1 ID */
+	OMAP_L3_SAD2D = 28,
+	/* MPU has 5 IDs */
+	OMAP_L3_IA_MPU_SS_1 = 27,
+	OMAP_L3_IA_MPU_SS_2 = 26,
+	OMAP_L3_IA_MPU_SS_3 = 25,
+	OMAP_L3_IA_MPU_SS_4 = 24,
+	OMAP_L3_IA_MPU_SS_5 = 23,
+	/* IVA2.2 SS has 3 IDs*/
+	OMAP_L3_IA_IVA_SS_1 = 22,
+	OMAP_L3_IA_IVA_SS_2 = 21,
+	OMAP_L3_IA_IVA_SS_3 = 20,
+	/* IVA 2.2 SS DMA has 6 IDS */
+	OMAP_L3_IA_IVA_SS_DMA_1 = 19,
+	OMAP_L3_IA_IVA_SS_DMA_2 = 18,
+	OMAP_L3_IA_IVA_SS_DMA_3 = 17,
+	OMAP_L3_IA_IVA_SS_DMA_4 = 16,
+	OMAP_L3_IA_IVA_SS_DMA_5 = 15,
+	OMAP_L3_IA_IVA_SS_DMA_6 = 14,
+	/* SGX has 1 ID */
+	OMAP_L3_IA_SGX = 13,
+	/* CAM has 3 ID */
+	OMAP_L3_IA_CAM_1 = 12,
+	OMAP_L3_IA_CAM_2 = 11,
+	OMAP_L3_IA_CAM_3 = 10,
+	/* DAP has 1 ID */
+	OMAP_L3_IA_DAP = 9,
+	/* SDMA WR has 2 IDs */
+	OMAP_L3_SDMA_WR_1 = 8,
+	OMAP_L3_SDMA_WR_2 = 7,
+	/* SDMA RD has 4 IDs */
+	OMAP_L3_SDMA_RD_1 = 6,
+	OMAP_L3_SDMA_RD_2 = 5,
+	OMAP_L3_SDMA_RD_3 = 4,
+	OMAP_L3_SDMA_RD_4 = 3,
+	/* HSUSB OTG has 1 ID */
+	OMAP_L3_USBOTG = 2,
+	/* HSUSB HOST has 1 ID */
+	OMAP_L3_USBHOST = 1,
+};
+
+enum omap3_l3_code {
+	OMAP_L3_CODE_NOERROR = 0,
+	OMAP_L3_CODE_UNSUP_CMD = 1,
+	OMAP_L3_CODE_ADDR_HOLE = 2,
+	OMAP_L3_CODE_PROTECT_VIOLATION = 3,
+	OMAP_L3_CODE_IN_BAND_ERR = 4,
+	/* codes 5 and 6 are reserved */
+	OMAP_L3_CODE_REQ_TOUT_NOT_ACCEPT = 7,
+	OMAP_L3_CODE_REQ_TOUT_NO_RESP = 8,
+	/* codes 9 - 15 are also reserved */
+};
+
+struct omap3_l3 {
+	struct device *dev;
+	struct clk *ick;
+
+	/* memory base*/
+	void __iomem *rt;
+
+	int debug_irq;
+	int app_irq;
+
+	/* true when and inband functional error occurs */
+	unsigned inband:1;
+};
+
+/* offsets for l3 agents in order with the Flag status register */
+static unsigned int omap3_l3_app_bases[] = {
+	/* MPU IA */
+	0x1400,
+	0x1400,
+	0x1400,
+	/* RESERVED */
+	0,
+	0,
+	0,
+	/* IVA 2.2 IA */
+	0x1800,
+	0x1800,
+	0x1800,
+	/* SGX IA */
+	0x1c00,
+	0x1c00,
+	/* RESERVED */
+	0,
+	/* CAMERA IA */
+	0x5800,
+	0x5800,
+	0x5800,
+	/* DISPLAY IA */
+	0x5400,
+	0x5400,
+	/* RESERVED */
+	0,
+	/*SDMA RD IA */
+	0x4c00,
+	0x4c00,
+	/* RESERVED */
+	0,
+	/* SDMA WR IA */
+	0x5000,
+	0x5000,
+	/* RESERVED */
+	0,
+	/* USB OTG IA */
+	0x4400,
+	0x4400,
+	0x4400,
+	/* USB HOST IA */
+	0x4000,
+	0x4000,
+	/* RESERVED */
+	0,
+	0,
+	0,
+	0,
+	/* SAD2D IA */
+	0x3000,
+	0x3000,
+	0x3000,
+	/* RESERVED */
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	/* SMA TA */
+	0x2000,
+	/* GPMC TA */
+	0x2400,
+	/* OCM RAM TA */
+	0x2800,
+	/* OCM ROM TA */
+	0x2C00,
+	/* L4 CORE TA */
+	0x6800,
+	/* L4 PER TA */
+	0x6c00,
+	/* IVA 2.2 TA */
+	0x6000,
+	/* SGX TA */
+	0x6400,
+	/* L4 EMU TA */
+	0x7000,
+	/* GPMC TA */
+	0x2400,
+	/* L4 CORE TA */
+	0x6800,
+	/* L4 PER TA */
+	0x6c00,
+	/* L4 EMU TA */
+	0x7000,
+	/* MAD2D TA */
+	0x3400,
+	/* RESERVED */
+	0,
+	0,
+};
+
+static unsigned int omap3_l3_debug_bases[] = {
+	/* MPU DATA IA */
+	0x1400,
+	/* RESERVED */
+	0,
+	0,
+	/* DAP IA */
+	0x5c00,
+	0x5c00,
+	/* RESERVED */
+	0,
+	/* IVA 2.2 IA */
+	0x1800,
+	/* REST RESERVED */
+};
+
+static u32 *omap3_l3_bases[] = {
+	omap3_l3_app_bases,
+	omap3_l3_debug_bases,
+};
+
+/*
+ * REVISIT define __raw_readll/__raw_writell here, but move them to
+ * <asm/io.h> at some point
+ */
+#define __raw_writell(v, a)	(__chk_io_ptr(a), \
+				*(volatile u64 __force *)(a) = (v))
+#define __raw_readll(a)		(__chk_io_ptr(a), \
+				*(volatile u64 __force *)(a))
+
+#endif
diff --git a/drivers/bus/qcom-ebi2.c b/drivers/bus/qcom-ebi2.c
new file mode 100644
index 000000000..bfb67aa00
--- /dev/null
+++ b/drivers/bus/qcom-ebi2.c
@@ -0,0 +1,410 @@
+/*
+ * Qualcomm External Bus Interface 2 (EBI2) driver
+ * an older version of the Qualcomm Parallel Interface Controller (QPIC)
+ *
+ * Copyright (C) 2016 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ * See the device tree bindings for this block for more details on the
+ * hardware.
+ */
+
+#include <linux/module.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/bitops.h>
+
+/*
+ * CS0, CS1, CS4 and CS5 are two bits wide, CS2 and CS3 are one bit.
+ */
+#define EBI2_CS0_ENABLE_MASK BIT(0)|BIT(1)
+#define EBI2_CS1_ENABLE_MASK BIT(2)|BIT(3)
+#define EBI2_CS2_ENABLE_MASK BIT(4)
+#define EBI2_CS3_ENABLE_MASK BIT(5)
+#define EBI2_CS4_ENABLE_MASK BIT(6)|BIT(7)
+#define EBI2_CS5_ENABLE_MASK BIT(8)|BIT(9)
+#define EBI2_CSN_MASK GENMASK(9, 0)
+
+#define EBI2_XMEM_CFG 0x0000 /* Power management etc */
+
+/*
+ * SLOW CSn CFG
+ *
+ * Bits 31-28: RECOVERY recovery cycles (0 = 1, 1 = 2 etc) this is the time the
+ *             memory continues to drive the data bus after OE is de-asserted.
+ *             Inserted when reading one CS and switching to another CS or read
+ *             followed by write on the same CS. Valid values 0 thru 15.
+ * Bits 27-24: WR_HOLD write hold cycles, these are extra cycles inserted after
+ *             every write minimum 1. The data out is driven from the time WE is
+ *             asserted until CS is asserted. With a hold of 1, the CS stays
+ *             active for 1 extra cycle etc. Valid values 0 thru 15.
+ * Bits 23-16: WR_DELTA initial latency for write cycles inserted for the first
+ *             write to a page or burst memory
+ * Bits 15-8:  RD_DELTA initial latency for read cycles inserted for the first
+ *             read to a page or burst memory
+ * Bits 7-4:   WR_WAIT number of wait cycles for every write access, 0=1 cycle
+ *             so 1 thru 16 cycles.
+ * Bits 3-0:   RD_WAIT number of wait cycles for every read access, 0=1 cycle
+ *             so 1 thru 16 cycles.
+ */
+#define EBI2_XMEM_CS0_SLOW_CFG 0x0008
+#define EBI2_XMEM_CS1_SLOW_CFG 0x000C
+#define EBI2_XMEM_CS2_SLOW_CFG 0x0010
+#define EBI2_XMEM_CS3_SLOW_CFG 0x0014
+#define EBI2_XMEM_CS4_SLOW_CFG 0x0018
+#define EBI2_XMEM_CS5_SLOW_CFG 0x001C
+
+#define EBI2_XMEM_RECOVERY_SHIFT	28
+#define EBI2_XMEM_WR_HOLD_SHIFT		24
+#define EBI2_XMEM_WR_DELTA_SHIFT	16
+#define EBI2_XMEM_RD_DELTA_SHIFT	8
+#define EBI2_XMEM_WR_WAIT_SHIFT		4
+#define EBI2_XMEM_RD_WAIT_SHIFT		0
+
+/*
+ * FAST CSn CFG
+ * Bits 31-28: ?
+ * Bits 27-24: RD_HOLD: the length in cycles of the first segment of a read
+ *             transfer. For a single read trandfer this will be the time
+ *             from CS assertion to OE assertion.
+ * Bits 18-24: ?
+ * Bits 17-16: ADV_OE_RECOVERY, the number of cycles elapsed before an OE
+ *             assertion, with respect to the cycle where ADV is asserted.
+ *             2 means 2 cycles between ADV and OE. Values 0, 1, 2 or 3.
+ * Bits 5:     ADDR_HOLD_ENA, The address is held for an extra cycle to meet
+ *             hold time requirements with ADV assertion.
+ *
+ * The manual mentions "write precharge cycles" and "precharge cycles".
+ * We have not been able to figure out which bit fields these correspond to
+ * in the hardware, or what valid values exist. The current hypothesis is that
+ * this is something just used on the FAST chip selects. There is also a "byte
+ * device enable" flag somewhere for 8bit memories.
+ */
+#define EBI2_XMEM_CS0_FAST_CFG 0x0028
+#define EBI2_XMEM_CS1_FAST_CFG 0x002C
+#define EBI2_XMEM_CS2_FAST_CFG 0x0030
+#define EBI2_XMEM_CS3_FAST_CFG 0x0034
+#define EBI2_XMEM_CS4_FAST_CFG 0x0038
+#define EBI2_XMEM_CS5_FAST_CFG 0x003C
+
+#define EBI2_XMEM_RD_HOLD_SHIFT		24
+#define EBI2_XMEM_ADV_OE_RECOVERY_SHIFT	16
+#define EBI2_XMEM_ADDR_HOLD_ENA_SHIFT	5
+
+/**
+ * struct cs_data - struct with info on a chipselect setting
+ * @enable_mask: mask to enable the chipselect in the EBI2 config
+ * @slow_cfg0: offset to XMEMC slow CS config
+ * @fast_cfg1: offset to XMEMC fast CS config
+ */
+struct cs_data {
+	u32 enable_mask;
+	u16 slow_cfg;
+	u16 fast_cfg;
+};
+
+static const struct cs_data cs_info[] = {
+	{
+		/* CS0 */
+		.enable_mask = EBI2_CS0_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS0_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS0_FAST_CFG,
+	},
+	{
+		/* CS1 */
+		.enable_mask = EBI2_CS1_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS1_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS1_FAST_CFG,
+	},
+	{
+		/* CS2 */
+		.enable_mask = EBI2_CS2_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS2_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS2_FAST_CFG,
+	},
+	{
+		/* CS3 */
+		.enable_mask = EBI2_CS3_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS3_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS3_FAST_CFG,
+	},
+	{
+		/* CS4 */
+		.enable_mask = EBI2_CS4_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS4_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS4_FAST_CFG,
+	},
+	{
+		/* CS5 */
+		.enable_mask = EBI2_CS5_ENABLE_MASK,
+		.slow_cfg = EBI2_XMEM_CS5_SLOW_CFG,
+		.fast_cfg = EBI2_XMEM_CS5_FAST_CFG,
+	},
+};
+
+/**
+ * struct ebi2_xmem_prop - describes an XMEM config property
+ * @prop: the device tree binding name
+ * @max: maximum value for the property
+ * @slowreg: true if this property is in the SLOW CS config register
+ * else it is assumed to be in the FAST config register
+ * @shift: the bit field start in the SLOW or FAST register for this
+ * property
+ */
+struct ebi2_xmem_prop {
+	const char *prop;
+	u32 max;
+	bool slowreg;
+	u16 shift;
+};
+
+static const struct ebi2_xmem_prop xmem_props[] = {
+	{
+		.prop = "qcom,xmem-recovery-cycles",
+		.max = 15,
+		.slowreg = true,
+		.shift = EBI2_XMEM_RECOVERY_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-write-hold-cycles",
+		.max = 15,
+		.slowreg = true,
+		.shift = EBI2_XMEM_WR_HOLD_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-write-delta-cycles",
+		.max = 255,
+		.slowreg = true,
+		.shift = EBI2_XMEM_WR_DELTA_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-read-delta-cycles",
+		.max = 255,
+		.slowreg = true,
+		.shift = EBI2_XMEM_RD_DELTA_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-write-wait-cycles",
+		.max = 15,
+		.slowreg = true,
+		.shift = EBI2_XMEM_WR_WAIT_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-read-wait-cycles",
+		.max = 15,
+		.slowreg = true,
+		.shift = EBI2_XMEM_RD_WAIT_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-address-hold-enable",
+		.max = 1, /* boolean prop */
+		.slowreg = false,
+		.shift = EBI2_XMEM_ADDR_HOLD_ENA_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-adv-to-oe-recovery-cycles",
+		.max = 3,
+		.slowreg = false,
+		.shift = EBI2_XMEM_ADV_OE_RECOVERY_SHIFT,
+	},
+	{
+		.prop = "qcom,xmem-read-hold-cycles",
+		.max = 15,
+		.slowreg = false,
+		.shift = EBI2_XMEM_RD_HOLD_SHIFT,
+	},
+};
+
+static void qcom_ebi2_setup_chipselect(struct device_node *np,
+				       struct device *dev,
+				       void __iomem *ebi2_base,
+				       void __iomem *ebi2_xmem,
+				       u32 csindex)
+{
+	const struct cs_data *csd;
+	u32 slowcfg, fastcfg;
+	u32 val;
+	int ret;
+	int i;
+
+	csd = &cs_info[csindex];
+	val = readl(ebi2_base);
+	val |= csd->enable_mask;
+	writel(val, ebi2_base);
+	dev_dbg(dev, "enabled CS%u\n", csindex);
+
+	/* Next set up the XMEMC */
+	slowcfg = 0;
+	fastcfg = 0;
+
+	for (i = 0; i < ARRAY_SIZE(xmem_props); i++) {
+		const struct ebi2_xmem_prop *xp = &xmem_props[i];
+
+		/* All are regular u32 values */
+		ret = of_property_read_u32(np, xp->prop, &val);
+		if (ret) {
+			dev_dbg(dev, "could not read %s for CS%d\n",
+				xp->prop, csindex);
+			continue;
+		}
+
+		/* First check boolean props */
+		if (xp->max == 1 && val) {
+			if (xp->slowreg)
+				slowcfg |= BIT(xp->shift);
+			else
+				fastcfg |= BIT(xp->shift);
+			dev_dbg(dev, "set %s flag\n", xp->prop);
+			continue;
+		}
+
+		/* We're dealing with an u32 */
+		if (val > xp->max) {
+			dev_err(dev,
+				"too high value for %s: %u, capped at %u\n",
+				xp->prop, val, xp->max);
+			val = xp->max;
+		}
+		if (xp->slowreg)
+			slowcfg |= (val << xp->shift);
+		else
+			fastcfg |= (val << xp->shift);
+		dev_dbg(dev, "set %s to %u\n", xp->prop, val);
+	}
+
+	dev_info(dev, "CS%u: SLOW CFG 0x%08x, FAST CFG 0x%08x\n",
+		 csindex, slowcfg, fastcfg);
+
+	if (slowcfg)
+		writel(slowcfg, ebi2_xmem + csd->slow_cfg);
+	if (fastcfg)
+		writel(fastcfg, ebi2_xmem + csd->fast_cfg);
+}
+
+static int qcom_ebi2_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device_node *child;
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	void __iomem *ebi2_base;
+	void __iomem *ebi2_xmem;
+	struct clk *ebi2xclk;
+	struct clk *ebi2clk;
+	bool have_children = false;
+	u32 val;
+	int ret;
+
+	ebi2xclk = devm_clk_get(dev, "ebi2x");
+	if (IS_ERR(ebi2xclk))
+		return PTR_ERR(ebi2xclk);
+
+	ret = clk_prepare_enable(ebi2xclk);
+	if (ret) {
+		dev_err(dev, "could not enable EBI2X clk (%d)\n", ret);
+		return ret;
+	}
+
+	ebi2clk = devm_clk_get(dev, "ebi2");
+	if (IS_ERR(ebi2clk)) {
+		ret = PTR_ERR(ebi2clk);
+		goto err_disable_2x_clk;
+	}
+
+	ret = clk_prepare_enable(ebi2clk);
+	if (ret) {
+		dev_err(dev, "could not enable EBI2 clk\n");
+		goto err_disable_2x_clk;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ebi2_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ebi2_base)) {
+		ret = PTR_ERR(ebi2_base);
+		goto err_disable_clk;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	ebi2_xmem = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ebi2_xmem)) {
+		ret = PTR_ERR(ebi2_xmem);
+		goto err_disable_clk;
+	}
+
+	/* Allegedly this turns the power save mode off */
+	writel(0UL, ebi2_xmem + EBI2_XMEM_CFG);
+
+	/* Disable all chipselects */
+	val = readl(ebi2_base);
+	val &= ~EBI2_CSN_MASK;
+	writel(val, ebi2_base);
+
+	/* Walk over the child nodes and see what chipselects we use */
+	for_each_available_child_of_node(np, child) {
+		u32 csindex;
+
+		/* Figure out the chipselect */
+		ret = of_property_read_u32(child, "reg", &csindex);
+		if (ret) {
+			of_node_put(child);
+			return ret;
+		}
+
+		if (csindex > 5) {
+			dev_err(dev,
+				"invalid chipselect %u, we only support 0-5\n",
+				csindex);
+			continue;
+		}
+
+		qcom_ebi2_setup_chipselect(child,
+					   dev,
+					   ebi2_base,
+					   ebi2_xmem,
+					   csindex);
+
+		/* We have at least one child */
+		have_children = true;
+	}
+
+	if (have_children)
+		return of_platform_default_populate(np, NULL, dev);
+	return 0;
+
+err_disable_clk:
+	clk_disable_unprepare(ebi2clk);
+err_disable_2x_clk:
+	clk_disable_unprepare(ebi2xclk);
+
+	return ret;
+}
+
+static const struct of_device_id qcom_ebi2_of_match[] = {
+	{ .compatible = "qcom,msm8660-ebi2", },
+	{ .compatible = "qcom,apq8060-ebi2", },
+	{ }
+};
+
+static struct platform_driver qcom_ebi2_driver = {
+	.probe = qcom_ebi2_probe,
+	.driver = {
+		.name = "qcom-ebi2",
+		.of_match_table = qcom_ebi2_of_match,
+	},
+};
+module_platform_driver(qcom_ebi2_driver);
+MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");
+MODULE_DESCRIPTION("Qualcomm EBI2 driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/bus/simple-pm-bus.c b/drivers/bus/simple-pm-bus.c
new file mode 100644
index 000000000..c5eb46cbf
--- /dev/null
+++ b/drivers/bus/simple-pm-bus.c
@@ -0,0 +1,58 @@
+/*
+ * Simple Power-Managed Bus Driver
+ *
+ * Copyright (C) 2014-2015 Glider bvba
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+
+
+static int simple_pm_bus_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+
+	dev_dbg(&pdev->dev, "%s\n", __func__);
+
+	pm_runtime_enable(&pdev->dev);
+
+	if (np)
+		of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+	return 0;
+}
+
+static int simple_pm_bus_remove(struct platform_device *pdev)
+{
+	dev_dbg(&pdev->dev, "%s\n", __func__);
+
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id simple_pm_bus_of_match[] = {
+	{ .compatible = "simple-pm-bus", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, simple_pm_bus_of_match);
+
+static struct platform_driver simple_pm_bus_driver = {
+	.probe = simple_pm_bus_probe,
+	.remove = simple_pm_bus_remove,
+	.driver = {
+		.name = "simple-pm-bus",
+		.of_match_table = simple_pm_bus_of_match,
+	},
+};
+
+module_platform_driver(simple_pm_bus_driver);
+
+MODULE_DESCRIPTION("Simple Power-Managed Bus Driver");
+MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/sun50i-de2.c b/drivers/bus/sun50i-de2.c
new file mode 100644
index 000000000..672518741
--- /dev/null
+++ b/drivers/bus/sun50i-de2.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Allwinner A64 Display Engine 2.0 Bus Driver
+ *
+ * Copyright (C) 2018 Icenowy Zheng <icenowy@aosc.io>
+ */
+
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/soc/sunxi/sunxi_sram.h>
+
+static int sun50i_de2_bus_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int ret;
+
+	ret = sunxi_sram_claim(&pdev->dev);
+	if (ret) {
+		dev_err(&pdev->dev, "Error couldn't map SRAM to device\n");
+		return ret;
+	}
+
+	of_platform_populate(np, NULL, NULL, &pdev->dev);
+
+	return 0;
+}
+
+static int sun50i_de2_bus_remove(struct platform_device *pdev)
+{
+	sunxi_sram_release(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id sun50i_de2_bus_of_match[] = {
+	{ .compatible = "allwinner,sun50i-a64-de2", },
+	{ /* sentinel */ }
+};
+
+static struct platform_driver sun50i_de2_bus_driver = {
+	.probe = sun50i_de2_bus_probe,
+	.remove = sun50i_de2_bus_remove,
+	.driver = {
+		.name = "sun50i-de2-bus",
+		.of_match_table = sun50i_de2_bus_of_match,
+	},
+};
+
+builtin_platform_driver(sun50i_de2_bus_driver);
diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
new file mode 100644
index 000000000..b85d013a9
--- /dev/null
+++ b/drivers/bus/sunxi-rsb.c
@@ -0,0 +1,786 @@
+/*
+ * RSB (Reduced Serial Bus) driver.
+ *
+ * Author: Chen-Yu Tsai <wens@csie.org>
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ *
+ * The RSB controller looks like an SMBus controller which only supports
+ * byte and word data transfers. But, it differs from standard SMBus
+ * protocol on several aspects:
+ * - it uses addresses set at runtime to address slaves. Runtime addresses
+ *   are sent to slaves using their 12bit hardware addresses. Up to 15
+ *   runtime addresses are available.
+ * - it adds a parity bit every 8bits of data and address for read and
+ *   write accesses; this replaces the ack bit
+ * - only one read access is required to read a byte (instead of a write
+ *   followed by a read access in standard SMBus protocol)
+ * - there's no Ack bit after each read access
+ *
+ * This means this bus cannot be used to interface with standard SMBus
+ * devices. Devices known to support this interface include the AXP223,
+ * AXP809, and AXP806 PMICs, and the AC100 audio codec, all from X-Powers.
+ *
+ * A description of the operation and wire protocol can be found in the
+ * RSB section of Allwinner's A80 user manual, which can be found at
+ *
+ *     https://github.com/allwinner-zh/documents/tree/master/A80
+ *
+ * This document is officially released by Allwinner.
+ *
+ * This driver is based on i2c-sun6i-p2wi.c, the P2WI bus driver.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clk/clk-conf.h>
+#include <linux/device.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/slab.h>
+#include <linux/sunxi-rsb.h>
+#include <linux/types.h>
+
+/* RSB registers */
+#define RSB_CTRL	0x0	/* Global control */
+#define RSB_CCR		0x4	/* Clock control */
+#define RSB_INTE	0x8	/* Interrupt controls */
+#define RSB_INTS	0xc	/* Interrupt status */
+#define RSB_ADDR	0x10	/* Address to send with read/write command */
+#define RSB_DATA	0x1c	/* Data to read/write */
+#define RSB_LCR		0x24	/* Line control */
+#define RSB_DMCR	0x28	/* Device mode (init) control */
+#define RSB_CMD		0x2c	/* RSB Command */
+#define RSB_DAR		0x30	/* Device address / runtime address */
+
+/* CTRL fields */
+#define RSB_CTRL_START_TRANS		BIT(7)
+#define RSB_CTRL_ABORT_TRANS		BIT(6)
+#define RSB_CTRL_GLOBAL_INT_ENB		BIT(1)
+#define RSB_CTRL_SOFT_RST		BIT(0)
+
+/* CLK CTRL fields */
+#define RSB_CCR_SDA_OUT_DELAY(v)	(((v) & 0x7) << 8)
+#define RSB_CCR_MAX_CLK_DIV		0xff
+#define RSB_CCR_CLK_DIV(v)		((v) & RSB_CCR_MAX_CLK_DIV)
+
+/* STATUS fields */
+#define RSB_INTS_TRANS_ERR_ACK		BIT(16)
+#define RSB_INTS_TRANS_ERR_DATA_BIT(v)	(((v) >> 8) & 0xf)
+#define RSB_INTS_TRANS_ERR_DATA		GENMASK(11, 8)
+#define RSB_INTS_LOAD_BSY		BIT(2)
+#define RSB_INTS_TRANS_ERR		BIT(1)
+#define RSB_INTS_TRANS_OVER		BIT(0)
+
+/* LINE CTRL fields*/
+#define RSB_LCR_SCL_STATE		BIT(5)
+#define RSB_LCR_SDA_STATE		BIT(4)
+#define RSB_LCR_SCL_CTL			BIT(3)
+#define RSB_LCR_SCL_CTL_EN		BIT(2)
+#define RSB_LCR_SDA_CTL			BIT(1)
+#define RSB_LCR_SDA_CTL_EN		BIT(0)
+
+/* DEVICE MODE CTRL field values */
+#define RSB_DMCR_DEVICE_START		BIT(31)
+#define RSB_DMCR_MODE_DATA		(0x7c << 16)
+#define RSB_DMCR_MODE_REG		(0x3e << 8)
+#define RSB_DMCR_DEV_ADDR		0x00
+
+/* CMD values */
+#define RSB_CMD_RD8			0x8b
+#define RSB_CMD_RD16			0x9c
+#define RSB_CMD_RD32			0xa6
+#define RSB_CMD_WR8			0x4e
+#define RSB_CMD_WR16			0x59
+#define RSB_CMD_WR32			0x63
+#define RSB_CMD_STRA			0xe8
+
+/* DAR fields */
+#define RSB_DAR_RTA(v)			(((v) & 0xff) << 16)
+#define RSB_DAR_DA(v)			((v) & 0xffff)
+
+#define RSB_MAX_FREQ			20000000
+
+#define RSB_CTRL_NAME			"sunxi-rsb"
+
+struct sunxi_rsb_addr_map {
+	u16 hwaddr;
+	u8 rtaddr;
+};
+
+struct sunxi_rsb {
+	struct device *dev;
+	void __iomem *regs;
+	struct clk *clk;
+	struct reset_control *rstc;
+	struct completion complete;
+	struct mutex lock;
+	unsigned int status;
+};
+
+/* bus / slave device related functions */
+static struct bus_type sunxi_rsb_bus;
+
+static int sunxi_rsb_device_match(struct device *dev, struct device_driver *drv)
+{
+	return of_driver_match_device(dev, drv);
+}
+
+static int sunxi_rsb_device_probe(struct device *dev)
+{
+	const struct sunxi_rsb_driver *drv = to_sunxi_rsb_driver(dev->driver);
+	struct sunxi_rsb_device *rdev = to_sunxi_rsb_device(dev);
+	int ret;
+
+	if (!drv->probe)
+		return -ENODEV;
+
+	if (!rdev->irq) {
+		int irq = -ENOENT;
+
+		if (dev->of_node)
+			irq = of_irq_get(dev->of_node, 0);
+
+		if (irq == -EPROBE_DEFER)
+			return irq;
+		if (irq < 0)
+			irq = 0;
+
+		rdev->irq = irq;
+	}
+
+	ret = of_clk_set_defaults(dev->of_node, false);
+	if (ret < 0)
+		return ret;
+
+	return drv->probe(rdev);
+}
+
+static int sunxi_rsb_device_remove(struct device *dev)
+{
+	const struct sunxi_rsb_driver *drv = to_sunxi_rsb_driver(dev->driver);
+
+	return drv->remove(to_sunxi_rsb_device(dev));
+}
+
+static struct bus_type sunxi_rsb_bus = {
+	.name		= RSB_CTRL_NAME,
+	.match		= sunxi_rsb_device_match,
+	.probe		= sunxi_rsb_device_probe,
+	.remove		= sunxi_rsb_device_remove,
+	.uevent		= of_device_uevent_modalias,
+};
+
+static void sunxi_rsb_dev_release(struct device *dev)
+{
+	struct sunxi_rsb_device *rdev = to_sunxi_rsb_device(dev);
+
+	kfree(rdev);
+}
+
+/**
+ * sunxi_rsb_device_create() - allocate and add an RSB device
+ * @rsb:	RSB controller
+ * @node:	RSB slave device node
+ * @hwaddr:	RSB slave hardware address
+ * @rtaddr:	RSB slave runtime address
+ */
+static struct sunxi_rsb_device *sunxi_rsb_device_create(struct sunxi_rsb *rsb,
+		struct device_node *node, u16 hwaddr, u8 rtaddr)
+{
+	int err;
+	struct sunxi_rsb_device *rdev;
+
+	rdev = kzalloc(sizeof(*rdev), GFP_KERNEL);
+	if (!rdev)
+		return ERR_PTR(-ENOMEM);
+
+	rdev->rsb = rsb;
+	rdev->hwaddr = hwaddr;
+	rdev->rtaddr = rtaddr;
+	rdev->dev.bus = &sunxi_rsb_bus;
+	rdev->dev.parent = rsb->dev;
+	rdev->dev.of_node = node;
+	rdev->dev.release = sunxi_rsb_dev_release;
+
+	dev_set_name(&rdev->dev, "%s-%x", RSB_CTRL_NAME, hwaddr);
+
+	err = device_register(&rdev->dev);
+	if (err < 0) {
+		dev_err(&rdev->dev, "Can't add %s, status %d\n",
+			dev_name(&rdev->dev), err);
+		goto err_device_add;
+	}
+
+	dev_dbg(&rdev->dev, "device %s registered\n", dev_name(&rdev->dev));
+
+	return rdev;
+
+err_device_add:
+	put_device(&rdev->dev);
+
+	return ERR_PTR(err);
+}
+
+/**
+ * sunxi_rsb_device_unregister(): unregister an RSB device
+ * @rdev:	rsb_device to be removed
+ */
+static void sunxi_rsb_device_unregister(struct sunxi_rsb_device *rdev)
+{
+	device_unregister(&rdev->dev);
+}
+
+static int sunxi_rsb_remove_devices(struct device *dev, void *data)
+{
+	struct sunxi_rsb_device *rdev = to_sunxi_rsb_device(dev);
+
+	if (dev->bus == &sunxi_rsb_bus)
+		sunxi_rsb_device_unregister(rdev);
+
+	return 0;
+}
+
+/**
+ * sunxi_rsb_driver_register() - Register device driver with RSB core
+ * @rdrv:	device driver to be associated with slave-device.
+ *
+ * This API will register the client driver with the RSB framework.
+ * It is typically called from the driver's module-init function.
+ */
+int sunxi_rsb_driver_register(struct sunxi_rsb_driver *rdrv)
+{
+	rdrv->driver.bus = &sunxi_rsb_bus;
+	return driver_register(&rdrv->driver);
+}
+EXPORT_SYMBOL_GPL(sunxi_rsb_driver_register);
+
+/* common code that starts a transfer */
+static int _sunxi_rsb_run_xfer(struct sunxi_rsb *rsb)
+{
+	if (readl(rsb->regs + RSB_CTRL) & RSB_CTRL_START_TRANS) {
+		dev_dbg(rsb->dev, "RSB transfer still in progress\n");
+		return -EBUSY;
+	}
+
+	reinit_completion(&rsb->complete);
+
+	writel(RSB_INTS_LOAD_BSY | RSB_INTS_TRANS_ERR | RSB_INTS_TRANS_OVER,
+	       rsb->regs + RSB_INTE);
+	writel(RSB_CTRL_START_TRANS | RSB_CTRL_GLOBAL_INT_ENB,
+	       rsb->regs + RSB_CTRL);
+
+	if (!wait_for_completion_io_timeout(&rsb->complete,
+					    msecs_to_jiffies(100))) {
+		dev_dbg(rsb->dev, "RSB timeout\n");
+
+		/* abort the transfer */
+		writel(RSB_CTRL_ABORT_TRANS, rsb->regs + RSB_CTRL);
+
+		/* clear any interrupt flags */
+		writel(readl(rsb->regs + RSB_INTS), rsb->regs + RSB_INTS);
+
+		return -ETIMEDOUT;
+	}
+
+	if (rsb->status & RSB_INTS_LOAD_BSY) {
+		dev_dbg(rsb->dev, "RSB busy\n");
+		return -EBUSY;
+	}
+
+	if (rsb->status & RSB_INTS_TRANS_ERR) {
+		if (rsb->status & RSB_INTS_TRANS_ERR_ACK) {
+			dev_dbg(rsb->dev, "RSB slave nack\n");
+			return -EINVAL;
+		}
+
+		if (rsb->status & RSB_INTS_TRANS_ERR_DATA) {
+			dev_dbg(rsb->dev, "RSB transfer data error\n");
+			return -EIO;
+		}
+	}
+
+	return 0;
+}
+
+static int sunxi_rsb_read(struct sunxi_rsb *rsb, u8 rtaddr, u8 addr,
+			  u32 *buf, size_t len)
+{
+	u32 cmd;
+	int ret;
+
+	if (!buf)
+		return -EINVAL;
+
+	switch (len) {
+	case 1:
+		cmd = RSB_CMD_RD8;
+		break;
+	case 2:
+		cmd = RSB_CMD_RD16;
+		break;
+	case 4:
+		cmd = RSB_CMD_RD32;
+		break;
+	default:
+		dev_err(rsb->dev, "Invalid access width: %zd\n", len);
+		return -EINVAL;
+	}
+
+	mutex_lock(&rsb->lock);
+
+	writel(addr, rsb->regs + RSB_ADDR);
+	writel(RSB_DAR_RTA(rtaddr), rsb->regs + RSB_DAR);
+	writel(cmd, rsb->regs + RSB_CMD);
+
+	ret = _sunxi_rsb_run_xfer(rsb);
+	if (ret)
+		goto unlock;
+
+	*buf = readl(rsb->regs + RSB_DATA) & GENMASK(len * 8 - 1, 0);
+
+unlock:
+	mutex_unlock(&rsb->lock);
+
+	return ret;
+}
+
+static int sunxi_rsb_write(struct sunxi_rsb *rsb, u8 rtaddr, u8 addr,
+			   const u32 *buf, size_t len)
+{
+	u32 cmd;
+	int ret;
+
+	if (!buf)
+		return -EINVAL;
+
+	switch (len) {
+	case 1:
+		cmd = RSB_CMD_WR8;
+		break;
+	case 2:
+		cmd = RSB_CMD_WR16;
+		break;
+	case 4:
+		cmd = RSB_CMD_WR32;
+		break;
+	default:
+		dev_err(rsb->dev, "Invalid access width: %zd\n", len);
+		return -EINVAL;
+	}
+
+	mutex_lock(&rsb->lock);
+
+	writel(addr, rsb->regs + RSB_ADDR);
+	writel(RSB_DAR_RTA(rtaddr), rsb->regs + RSB_DAR);
+	writel(*buf, rsb->regs + RSB_DATA);
+	writel(cmd, rsb->regs + RSB_CMD);
+	ret = _sunxi_rsb_run_xfer(rsb);
+
+	mutex_unlock(&rsb->lock);
+
+	return ret;
+}
+
+/* RSB regmap functions */
+struct sunxi_rsb_ctx {
+	struct sunxi_rsb_device *rdev;
+	int size;
+};
+
+static int regmap_sunxi_rsb_reg_read(void *context, unsigned int reg,
+				     unsigned int *val)
+{
+	struct sunxi_rsb_ctx *ctx = context;
+	struct sunxi_rsb_device *rdev = ctx->rdev;
+
+	if (reg > 0xff)
+		return -EINVAL;
+
+	return sunxi_rsb_read(rdev->rsb, rdev->rtaddr, reg, val, ctx->size);
+}
+
+static int regmap_sunxi_rsb_reg_write(void *context, unsigned int reg,
+				      unsigned int val)
+{
+	struct sunxi_rsb_ctx *ctx = context;
+	struct sunxi_rsb_device *rdev = ctx->rdev;
+
+	return sunxi_rsb_write(rdev->rsb, rdev->rtaddr, reg, &val, ctx->size);
+}
+
+static void regmap_sunxi_rsb_free_ctx(void *context)
+{
+	struct sunxi_rsb_ctx *ctx = context;
+
+	kfree(ctx);
+}
+
+static struct regmap_bus regmap_sunxi_rsb = {
+	.reg_write = regmap_sunxi_rsb_reg_write,
+	.reg_read = regmap_sunxi_rsb_reg_read,
+	.free_context = regmap_sunxi_rsb_free_ctx,
+	.reg_format_endian_default = REGMAP_ENDIAN_NATIVE,
+	.val_format_endian_default = REGMAP_ENDIAN_NATIVE,
+};
+
+static struct sunxi_rsb_ctx *regmap_sunxi_rsb_init_ctx(struct sunxi_rsb_device *rdev,
+		const struct regmap_config *config)
+{
+	struct sunxi_rsb_ctx *ctx;
+
+	switch (config->val_bits) {
+	case 8:
+	case 16:
+	case 32:
+		break;
+	default:
+		return ERR_PTR(-EINVAL);
+	}
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return ERR_PTR(-ENOMEM);
+
+	ctx->rdev = rdev;
+	ctx->size = config->val_bits / 8;
+
+	return ctx;
+}
+
+struct regmap *__devm_regmap_init_sunxi_rsb(struct sunxi_rsb_device *rdev,
+					    const struct regmap_config *config,
+					    struct lock_class_key *lock_key,
+					    const char *lock_name)
+{
+	struct sunxi_rsb_ctx *ctx = regmap_sunxi_rsb_init_ctx(rdev, config);
+
+	if (IS_ERR(ctx))
+		return ERR_CAST(ctx);
+
+	return __devm_regmap_init(&rdev->dev, &regmap_sunxi_rsb, ctx, config,
+				  lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__devm_regmap_init_sunxi_rsb);
+
+/* RSB controller driver functions */
+static irqreturn_t sunxi_rsb_irq(int irq, void *dev_id)
+{
+	struct sunxi_rsb *rsb = dev_id;
+	u32 status;
+
+	status = readl(rsb->regs + RSB_INTS);
+	rsb->status = status;
+
+	/* Clear interrupts */
+	status &= (RSB_INTS_LOAD_BSY | RSB_INTS_TRANS_ERR |
+		   RSB_INTS_TRANS_OVER);
+	writel(status, rsb->regs + RSB_INTS);
+
+	complete(&rsb->complete);
+
+	return IRQ_HANDLED;
+}
+
+static int sunxi_rsb_init_device_mode(struct sunxi_rsb *rsb)
+{
+	int ret = 0;
+	u32 reg;
+
+	/* send init sequence */
+	writel(RSB_DMCR_DEVICE_START | RSB_DMCR_MODE_DATA |
+	       RSB_DMCR_MODE_REG | RSB_DMCR_DEV_ADDR, rsb->regs + RSB_DMCR);
+
+	readl_poll_timeout(rsb->regs + RSB_DMCR, reg,
+			   !(reg & RSB_DMCR_DEVICE_START), 100, 250000);
+	if (reg & RSB_DMCR_DEVICE_START)
+		ret = -ETIMEDOUT;
+
+	/* clear interrupt status bits */
+	writel(readl(rsb->regs + RSB_INTS), rsb->regs + RSB_INTS);
+
+	return ret;
+}
+
+/*
+ * There are 15 valid runtime addresses, though Allwinner typically
+ * skips the first, for unknown reasons, and uses the following three.
+ *
+ * 0x17, 0x2d, 0x3a, 0x4e, 0x59, 0x63, 0x74, 0x8b,
+ * 0x9c, 0xa6, 0xb1, 0xc5, 0xd2, 0xe8, 0xff
+ *
+ * No designs with 2 RSB slave devices sharing identical hardware
+ * addresses on the same bus have been seen in the wild. All designs
+ * use 0x2d for the primary PMIC, 0x3a for the secondary PMIC if
+ * there is one, and 0x45 for peripheral ICs.
+ *
+ * The hardware does not seem to support re-setting runtime addresses.
+ * Attempts to do so result in the slave devices returning a NACK.
+ * Hence we just hardcode the mapping here, like Allwinner does.
+ */
+
+static const struct sunxi_rsb_addr_map sunxi_rsb_addr_maps[] = {
+	{ 0x3a3, 0x2d }, /* Primary PMIC: AXP223, AXP809, AXP81X, ... */
+	{ 0x745, 0x3a }, /* Secondary PMIC: AXP806, ... */
+	{ 0xe89, 0x4e }, /* Peripheral IC: AC100, ... */
+};
+
+static u8 sunxi_rsb_get_rtaddr(u16 hwaddr)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(sunxi_rsb_addr_maps); i++)
+		if (hwaddr == sunxi_rsb_addr_maps[i].hwaddr)
+			return sunxi_rsb_addr_maps[i].rtaddr;
+
+	return 0; /* 0 is an invalid runtime address */
+}
+
+static int of_rsb_register_devices(struct sunxi_rsb *rsb)
+{
+	struct device *dev = rsb->dev;
+	struct device_node *child, *np = dev->of_node;
+	u32 hwaddr;
+	u8 rtaddr;
+	int ret;
+
+	if (!np)
+		return -EINVAL;
+
+	/* Runtime addresses for all slaves should be set first */
+	for_each_available_child_of_node(np, child) {
+		dev_dbg(dev, "setting child %pOF runtime address\n",
+			child);
+
+		ret = of_property_read_u32(child, "reg", &hwaddr);
+		if (ret) {
+			dev_err(dev, "%pOF: invalid 'reg' property: %d\n",
+				child, ret);
+			continue;
+		}
+
+		rtaddr = sunxi_rsb_get_rtaddr(hwaddr);
+		if (!rtaddr) {
+			dev_err(dev, "%pOF: unknown hardware device address\n",
+				child);
+			continue;
+		}
+
+		/*
+		 * Since no devices have been registered yet, we are the
+		 * only ones using the bus, we can skip locking the bus.
+		 */
+
+		/* setup command parameters */
+		writel(RSB_CMD_STRA, rsb->regs + RSB_CMD);
+		writel(RSB_DAR_RTA(rtaddr) | RSB_DAR_DA(hwaddr),
+		       rsb->regs + RSB_DAR);
+
+		/* send command */
+		ret = _sunxi_rsb_run_xfer(rsb);
+		if (ret)
+			dev_warn(dev, "%pOF: set runtime address failed: %d\n",
+				 child, ret);
+	}
+
+	/* Then we start adding devices and probing them */
+	for_each_available_child_of_node(np, child) {
+		struct sunxi_rsb_device *rdev;
+
+		dev_dbg(dev, "adding child %pOF\n", child);
+
+		ret = of_property_read_u32(child, "reg", &hwaddr);
+		if (ret)
+			continue;
+
+		rtaddr = sunxi_rsb_get_rtaddr(hwaddr);
+		if (!rtaddr)
+			continue;
+
+		rdev = sunxi_rsb_device_create(rsb, child, hwaddr, rtaddr);
+		if (IS_ERR(rdev))
+			dev_err(dev, "failed to add child device %pOF: %ld\n",
+				child, PTR_ERR(rdev));
+	}
+
+	return 0;
+}
+
+static const struct of_device_id sunxi_rsb_of_match_table[] = {
+	{ .compatible = "allwinner,sun8i-a23-rsb" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, sunxi_rsb_of_match_table);
+
+static int sunxi_rsb_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct resource *r;
+	struct sunxi_rsb *rsb;
+	unsigned long p_clk_freq;
+	u32 clk_delay, clk_freq = 3000000;
+	int clk_div, irq, ret;
+	u32 reg;
+
+	of_property_read_u32(np, "clock-frequency", &clk_freq);
+	if (clk_freq > RSB_MAX_FREQ) {
+		dev_err(dev,
+			"clock-frequency (%u Hz) is too high (max = 20MHz)\n",
+			clk_freq);
+		return -EINVAL;
+	}
+
+	rsb = devm_kzalloc(dev, sizeof(*rsb), GFP_KERNEL);
+	if (!rsb)
+		return -ENOMEM;
+
+	rsb->dev = dev;
+	platform_set_drvdata(pdev, rsb);
+	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	rsb->regs = devm_ioremap_resource(dev, r);
+	if (IS_ERR(rsb->regs))
+		return PTR_ERR(rsb->regs);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(dev, "failed to retrieve irq: %d\n", irq);
+		return irq;
+	}
+
+	rsb->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(rsb->clk)) {
+		ret = PTR_ERR(rsb->clk);
+		dev_err(dev, "failed to retrieve clk: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(rsb->clk);
+	if (ret) {
+		dev_err(dev, "failed to enable clk: %d\n", ret);
+		return ret;
+	}
+
+	p_clk_freq = clk_get_rate(rsb->clk);
+
+	rsb->rstc = devm_reset_control_get(dev, NULL);
+	if (IS_ERR(rsb->rstc)) {
+		ret = PTR_ERR(rsb->rstc);
+		dev_err(dev, "failed to retrieve reset controller: %d\n", ret);
+		goto err_clk_disable;
+	}
+
+	ret = reset_control_deassert(rsb->rstc);
+	if (ret) {
+		dev_err(dev, "failed to deassert reset line: %d\n", ret);
+		goto err_clk_disable;
+	}
+
+	init_completion(&rsb->complete);
+	mutex_init(&rsb->lock);
+
+	/* reset the controller */
+	writel(RSB_CTRL_SOFT_RST, rsb->regs + RSB_CTRL);
+	readl_poll_timeout(rsb->regs + RSB_CTRL, reg,
+			   !(reg & RSB_CTRL_SOFT_RST), 1000, 100000);
+
+	/*
+	 * Clock frequency and delay calculation code is from
+	 * Allwinner U-boot sources.
+	 *
+	 * From A83 user manual:
+	 * bus clock frequency = parent clock frequency / (2 * (divider + 1))
+	 */
+	clk_div = p_clk_freq / clk_freq / 2;
+	if (!clk_div)
+		clk_div = 1;
+	else if (clk_div > RSB_CCR_MAX_CLK_DIV + 1)
+		clk_div = RSB_CCR_MAX_CLK_DIV + 1;
+
+	clk_delay = clk_div >> 1;
+	if (!clk_delay)
+		clk_delay = 1;
+
+	dev_info(dev, "RSB running at %lu Hz\n", p_clk_freq / clk_div / 2);
+	writel(RSB_CCR_SDA_OUT_DELAY(clk_delay) | RSB_CCR_CLK_DIV(clk_div - 1),
+	       rsb->regs + RSB_CCR);
+
+	ret = devm_request_irq(dev, irq, sunxi_rsb_irq, 0, RSB_CTRL_NAME, rsb);
+	if (ret) {
+		dev_err(dev, "can't register interrupt handler irq %d: %d\n",
+			irq, ret);
+		goto err_reset_assert;
+	}
+
+	/* initialize all devices on the bus into RSB mode */
+	ret = sunxi_rsb_init_device_mode(rsb);
+	if (ret)
+		dev_warn(dev, "Initialize device mode failed: %d\n", ret);
+
+	of_rsb_register_devices(rsb);
+
+	return 0;
+
+err_reset_assert:
+	reset_control_assert(rsb->rstc);
+
+err_clk_disable:
+	clk_disable_unprepare(rsb->clk);
+
+	return ret;
+}
+
+static int sunxi_rsb_remove(struct platform_device *pdev)
+{
+	struct sunxi_rsb *rsb = platform_get_drvdata(pdev);
+
+	device_for_each_child(rsb->dev, NULL, sunxi_rsb_remove_devices);
+	reset_control_assert(rsb->rstc);
+	clk_disable_unprepare(rsb->clk);
+
+	return 0;
+}
+
+static struct platform_driver sunxi_rsb_driver = {
+	.probe = sunxi_rsb_probe,
+	.remove	= sunxi_rsb_remove,
+	.driver	= {
+		.name = RSB_CTRL_NAME,
+		.of_match_table = sunxi_rsb_of_match_table,
+	},
+};
+
+static int __init sunxi_rsb_init(void)
+{
+	int ret;
+
+	ret = bus_register(&sunxi_rsb_bus);
+	if (ret) {
+		pr_err("failed to register sunxi sunxi_rsb bus: %d\n", ret);
+		return ret;
+	}
+
+	return platform_driver_register(&sunxi_rsb_driver);
+}
+module_init(sunxi_rsb_init);
+
+static void __exit sunxi_rsb_exit(void)
+{
+	platform_driver_unregister(&sunxi_rsb_driver);
+	bus_unregister(&sunxi_rsb_bus);
+}
+module_exit(sunxi_rsb_exit);
+
+MODULE_AUTHOR("Chen-Yu Tsai <wens@csie.org>");
+MODULE_DESCRIPTION("Allwinner sunXi Reduced Serial Bus controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/tegra-aconnect.c b/drivers/bus/tegra-aconnect.c
new file mode 100644
index 000000000..084ae286f
--- /dev/null
+++ b/drivers/bus/tegra-aconnect.c
@@ -0,0 +1,94 @@
+/*
+ * Tegra ACONNECT Bus Driver
+ *
+ * Copyright (C) 2016, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_clock.h>
+#include <linux/pm_runtime.h>
+
+static int tegra_aconnect_probe(struct platform_device *pdev)
+{
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -EINVAL;
+
+	ret = pm_clk_create(&pdev->dev);
+	if (ret)
+		return ret;
+
+	ret = of_pm_clk_add_clk(&pdev->dev, "ape");
+	if (ret)
+		goto clk_destroy;
+
+	ret = of_pm_clk_add_clk(&pdev->dev, "apb2ape");
+	if (ret)
+		goto clk_destroy;
+
+	pm_runtime_enable(&pdev->dev);
+
+	of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+
+	dev_info(&pdev->dev, "Tegra ACONNECT bus registered\n");
+
+	return 0;
+
+clk_destroy:
+	pm_clk_destroy(&pdev->dev);
+
+	return ret;
+}
+
+static int tegra_aconnect_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+
+	pm_clk_destroy(&pdev->dev);
+
+	return 0;
+}
+
+static int tegra_aconnect_runtime_resume(struct device *dev)
+{
+	return pm_clk_resume(dev);
+}
+
+static int tegra_aconnect_runtime_suspend(struct device *dev)
+{
+	return pm_clk_suspend(dev);
+}
+
+static const struct dev_pm_ops tegra_aconnect_pm_ops = {
+	SET_RUNTIME_PM_OPS(tegra_aconnect_runtime_suspend,
+			   tegra_aconnect_runtime_resume, NULL)
+};
+
+static const struct of_device_id tegra_aconnect_of_match[] = {
+	{ .compatible = "nvidia,tegra210-aconnect", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tegra_aconnect_of_match);
+
+static struct platform_driver tegra_aconnect_driver = {
+	.probe = tegra_aconnect_probe,
+	.remove = tegra_aconnect_remove,
+	.driver = {
+		.name = "tegra-aconnect",
+		.of_match_table = tegra_aconnect_of_match,
+		.pm = &tegra_aconnect_pm_ops,
+	},
+};
+module_platform_driver(tegra_aconnect_driver);
+
+MODULE_DESCRIPTION("NVIDIA Tegra ACONNECT Bus Driver");
+MODULE_AUTHOR("Jon Hunter <jonathanh@nvidia.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/tegra-gmi.c b/drivers/bus/tegra-gmi.c
new file mode 100644
index 000000000..a6570789f
--- /dev/null
+++ b/drivers/bus/tegra-gmi.c
@@ -0,0 +1,284 @@
+/*
+ * Driver for NVIDIA Generic Memory Interface
+ *
+ * Copyright (C) 2016 Host Mobility AB. All rights reserved.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/reset.h>
+
+#define TEGRA_GMI_CONFIG		0x00
+#define TEGRA_GMI_CONFIG_GO		BIT(31)
+#define TEGRA_GMI_BUS_WIDTH_32BIT	BIT(30)
+#define TEGRA_GMI_MUX_MODE		BIT(28)
+#define TEGRA_GMI_RDY_BEFORE_DATA	BIT(24)
+#define TEGRA_GMI_RDY_ACTIVE_HIGH	BIT(23)
+#define TEGRA_GMI_ADV_ACTIVE_HIGH	BIT(22)
+#define TEGRA_GMI_OE_ACTIVE_HIGH	BIT(21)
+#define TEGRA_GMI_CS_ACTIVE_HIGH	BIT(20)
+#define TEGRA_GMI_CS_SELECT(x)		((x & 0x7) << 4)
+
+#define TEGRA_GMI_TIMING0		0x10
+#define TEGRA_GMI_MUXED_WIDTH(x)	((x & 0xf) << 12)
+#define TEGRA_GMI_HOLD_WIDTH(x)		((x & 0xf) << 8)
+#define TEGRA_GMI_ADV_WIDTH(x)		((x & 0xf) << 4)
+#define TEGRA_GMI_CE_WIDTH(x)		(x & 0xf)
+
+#define TEGRA_GMI_TIMING1		0x14
+#define TEGRA_GMI_WE_WIDTH(x)		((x & 0xff) << 16)
+#define TEGRA_GMI_OE_WIDTH(x)		((x & 0xff) << 8)
+#define TEGRA_GMI_WAIT_WIDTH(x)		(x & 0xff)
+
+#define TEGRA_GMI_MAX_CHIP_SELECT	8
+
+struct tegra_gmi {
+	struct device *dev;
+	void __iomem *base;
+	struct clk *clk;
+	struct reset_control *rst;
+
+	u32 snor_config;
+	u32 snor_timing0;
+	u32 snor_timing1;
+};
+
+static int tegra_gmi_enable(struct tegra_gmi *gmi)
+{
+	int err;
+
+	err = clk_prepare_enable(gmi->clk);
+	if (err < 0) {
+		dev_err(gmi->dev, "failed to enable clock: %d\n", err);
+		return err;
+	}
+
+	reset_control_assert(gmi->rst);
+	usleep_range(2000, 4000);
+	reset_control_deassert(gmi->rst);
+
+	writel(gmi->snor_timing0, gmi->base + TEGRA_GMI_TIMING0);
+	writel(gmi->snor_timing1, gmi->base + TEGRA_GMI_TIMING1);
+
+	gmi->snor_config |= TEGRA_GMI_CONFIG_GO;
+	writel(gmi->snor_config, gmi->base + TEGRA_GMI_CONFIG);
+
+	return 0;
+}
+
+static void tegra_gmi_disable(struct tegra_gmi *gmi)
+{
+	u32 config;
+
+	/* stop GMI operation */
+	config = readl(gmi->base + TEGRA_GMI_CONFIG);
+	config &= ~TEGRA_GMI_CONFIG_GO;
+	writel(config, gmi->base + TEGRA_GMI_CONFIG);
+
+	reset_control_assert(gmi->rst);
+	clk_disable_unprepare(gmi->clk);
+}
+
+static int tegra_gmi_parse_dt(struct tegra_gmi *gmi)
+{
+	struct device_node *child;
+	u32 property, ranges[4];
+	int err;
+
+	child = of_get_next_available_child(gmi->dev->of_node, NULL);
+	if (!child) {
+		dev_err(gmi->dev, "no child nodes found\n");
+		return -ENODEV;
+	}
+
+	/*
+	 * We currently only support one child device due to lack of
+	 * chip-select address decoding. Which means that we only have one
+	 * chip-select line from the GMI controller.
+	 */
+	if (of_get_child_count(gmi->dev->of_node) > 1)
+		dev_warn(gmi->dev, "only one child device is supported.");
+
+	if (of_property_read_bool(child, "nvidia,snor-data-width-32bit"))
+		gmi->snor_config |= TEGRA_GMI_BUS_WIDTH_32BIT;
+
+	if (of_property_read_bool(child, "nvidia,snor-mux-mode"))
+		gmi->snor_config |= TEGRA_GMI_MUX_MODE;
+
+	if (of_property_read_bool(child, "nvidia,snor-rdy-active-before-data"))
+		gmi->snor_config |= TEGRA_GMI_RDY_BEFORE_DATA;
+
+	if (of_property_read_bool(child, "nvidia,snor-rdy-active-high"))
+		gmi->snor_config |= TEGRA_GMI_RDY_ACTIVE_HIGH;
+
+	if (of_property_read_bool(child, "nvidia,snor-adv-active-high"))
+		gmi->snor_config |= TEGRA_GMI_ADV_ACTIVE_HIGH;
+
+	if (of_property_read_bool(child, "nvidia,snor-oe-active-high"))
+		gmi->snor_config |= TEGRA_GMI_OE_ACTIVE_HIGH;
+
+	if (of_property_read_bool(child, "nvidia,snor-cs-active-high"))
+		gmi->snor_config |= TEGRA_GMI_CS_ACTIVE_HIGH;
+
+	/* Decode the CS# */
+	err = of_property_read_u32_array(child, "ranges", ranges, 4);
+	if (err < 0) {
+		/* Invalid binding */
+		if (err == -EOVERFLOW) {
+			dev_err(gmi->dev,
+				"failed to decode CS: invalid ranges length\n");
+			goto error_cs;
+		}
+
+		/*
+		 * If we reach here it means that the child node has an empty
+		 * ranges or it does not exist at all. Attempt to decode the
+		 * CS# from the reg property instead.
+		 */
+		err = of_property_read_u32(child, "reg", &property);
+		if (err < 0) {
+			dev_err(gmi->dev,
+				"failed to decode CS: no reg property found\n");
+			goto error_cs;
+		}
+	} else {
+		property = ranges[1];
+	}
+
+	/* Valid chip selects are CS0-CS7 */
+	if (property >= TEGRA_GMI_MAX_CHIP_SELECT) {
+		dev_err(gmi->dev, "invalid chip select: %d", property);
+		err = -EINVAL;
+		goto error_cs;
+	}
+
+	gmi->snor_config |= TEGRA_GMI_CS_SELECT(property);
+
+	/* The default values that are provided below are reset values */
+	if (!of_property_read_u32(child, "nvidia,snor-muxed-width", &property))
+		gmi->snor_timing0 |= TEGRA_GMI_MUXED_WIDTH(property);
+	else
+		gmi->snor_timing0 |= TEGRA_GMI_MUXED_WIDTH(1);
+
+	if (!of_property_read_u32(child, "nvidia,snor-hold-width", &property))
+		gmi->snor_timing0 |= TEGRA_GMI_HOLD_WIDTH(property);
+	else
+		gmi->snor_timing0 |= TEGRA_GMI_HOLD_WIDTH(1);
+
+	if (!of_property_read_u32(child, "nvidia,snor-adv-width", &property))
+		gmi->snor_timing0 |= TEGRA_GMI_ADV_WIDTH(property);
+	else
+		gmi->snor_timing0 |= TEGRA_GMI_ADV_WIDTH(1);
+
+	if (!of_property_read_u32(child, "nvidia,snor-ce-width", &property))
+		gmi->snor_timing0 |= TEGRA_GMI_CE_WIDTH(property);
+	else
+		gmi->snor_timing0 |= TEGRA_GMI_CE_WIDTH(4);
+
+	if (!of_property_read_u32(child, "nvidia,snor-we-width", &property))
+		gmi->snor_timing1 |= TEGRA_GMI_WE_WIDTH(property);
+	else
+		gmi->snor_timing1 |= TEGRA_GMI_WE_WIDTH(1);
+
+	if (!of_property_read_u32(child, "nvidia,snor-oe-width", &property))
+		gmi->snor_timing1 |= TEGRA_GMI_OE_WIDTH(property);
+	else
+		gmi->snor_timing1 |= TEGRA_GMI_OE_WIDTH(1);
+
+	if (!of_property_read_u32(child, "nvidia,snor-wait-width", &property))
+		gmi->snor_timing1 |= TEGRA_GMI_WAIT_WIDTH(property);
+	else
+		gmi->snor_timing1 |= TEGRA_GMI_WAIT_WIDTH(3);
+
+error_cs:
+	of_node_put(child);
+	return err;
+}
+
+static int tegra_gmi_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct tegra_gmi *gmi;
+	struct resource *res;
+	int err;
+
+	gmi = devm_kzalloc(dev, sizeof(*gmi), GFP_KERNEL);
+	if (!gmi)
+		return -ENOMEM;
+
+	gmi->dev = dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	gmi->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(gmi->base))
+		return PTR_ERR(gmi->base);
+
+	gmi->clk = devm_clk_get(dev, "gmi");
+	if (IS_ERR(gmi->clk)) {
+		dev_err(dev, "can not get clock\n");
+		return PTR_ERR(gmi->clk);
+	}
+
+	gmi->rst = devm_reset_control_get(dev, "gmi");
+	if (IS_ERR(gmi->rst)) {
+		dev_err(dev, "can not get reset\n");
+		return PTR_ERR(gmi->rst);
+	}
+
+	err = tegra_gmi_parse_dt(gmi);
+	if (err)
+		return err;
+
+	err = tegra_gmi_enable(gmi);
+	if (err < 0)
+		return err;
+
+	err = of_platform_default_populate(dev->of_node, NULL, dev);
+	if (err < 0) {
+		dev_err(dev, "fail to create devices.\n");
+		tegra_gmi_disable(gmi);
+		return err;
+	}
+
+	platform_set_drvdata(pdev, gmi);
+
+	return 0;
+}
+
+static int tegra_gmi_remove(struct platform_device *pdev)
+{
+	struct tegra_gmi *gmi = platform_get_drvdata(pdev);
+
+	of_platform_depopulate(gmi->dev);
+	tegra_gmi_disable(gmi);
+
+	return 0;
+}
+
+static const struct of_device_id tegra_gmi_id_table[] = {
+	{ .compatible = "nvidia,tegra20-gmi", },
+	{ .compatible = "nvidia,tegra30-gmi", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, tegra_gmi_id_table);
+
+static struct platform_driver tegra_gmi_driver = {
+	.probe = tegra_gmi_probe,
+	.remove = tegra_gmi_remove,
+	.driver = {
+		.name		= "tegra-gmi",
+		.of_match_table	= tegra_gmi_id_table,
+	},
+};
+module_platform_driver(tegra_gmi_driver);
+
+MODULE_AUTHOR("Mirza Krak <mirza.krak@gmail.com");
+MODULE_DESCRIPTION("NVIDIA Tegra GMI Bus Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c
new file mode 100644
index 000000000..bc274ddb9
--- /dev/null
+++ b/drivers/bus/ti-sysc.c
@@ -0,0 +1,1875 @@
+/*
+ * ti-sysc.c - Texas Instruments sysc interconnect target driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/clkdev.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/slab.h>
+#include <linux/iopoll.h>
+
+#include <linux/platform_data/ti-sysc.h>
+
+#include <dt-bindings/bus/ti-sysc.h>
+
+#define MAX_MODULE_SOFTRESET_WAIT		10000
+
+static const char * const reg_names[] = { "rev", "sysc", "syss", };
+
+enum sysc_clocks {
+	SYSC_FCK,
+	SYSC_ICK,
+	SYSC_OPTFCK0,
+	SYSC_OPTFCK1,
+	SYSC_OPTFCK2,
+	SYSC_OPTFCK3,
+	SYSC_OPTFCK4,
+	SYSC_OPTFCK5,
+	SYSC_OPTFCK6,
+	SYSC_OPTFCK7,
+	SYSC_MAX_CLOCKS,
+};
+
+static const char * const clock_names[SYSC_ICK + 1] = { "fck", "ick", };
+
+#define SYSC_IDLEMODE_MASK		3
+#define SYSC_CLOCKACTIVITY_MASK		3
+
+/**
+ * struct sysc - TI sysc interconnect target module registers and capabilities
+ * @dev: struct device pointer
+ * @module_pa: physical address of the interconnect target module
+ * @module_size: size of the interconnect target module
+ * @module_va: virtual address of the interconnect target module
+ * @offsets: register offsets from module base
+ * @clocks: clocks used by the interconnect target module
+ * @clock_roles: clock role names for the found clocks
+ * @nr_clocks: number of clocks used by the interconnect target module
+ * @legacy_mode: configured for legacy mode if set
+ * @cap: interconnect target module capabilities
+ * @cfg: interconnect target module configuration
+ * @name: name if available
+ * @revision: interconnect target module revision
+ * @needs_resume: runtime resume needed on resume from suspend
+ */
+struct sysc {
+	struct device *dev;
+	u64 module_pa;
+	u32 module_size;
+	void __iomem *module_va;
+	int offsets[SYSC_MAX_REGS];
+	struct clk **clocks;
+	const char **clock_roles;
+	int nr_clocks;
+	struct reset_control *rsts;
+	const char *legacy_mode;
+	const struct sysc_capabilities *cap;
+	struct sysc_config cfg;
+	struct ti_sysc_cookie cookie;
+	const char *name;
+	u32 revision;
+	bool enabled;
+	bool needs_resume;
+	bool child_needs_resume;
+	struct delayed_work idle_work;
+};
+
+static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
+				  bool is_child);
+
+void sysc_write(struct sysc *ddata, int offset, u32 value)
+{
+	writel_relaxed(value, ddata->module_va + offset);
+}
+
+static u32 sysc_read(struct sysc *ddata, int offset)
+{
+	if (ddata->cfg.quirks & SYSC_QUIRK_16BIT) {
+		u32 val;
+
+		val = readw_relaxed(ddata->module_va + offset);
+		val |= (readw_relaxed(ddata->module_va + offset + 4) << 16);
+
+		return val;
+	}
+
+	return readl_relaxed(ddata->module_va + offset);
+}
+
+static bool sysc_opt_clks_needed(struct sysc *ddata)
+{
+	return !!(ddata->cfg.quirks & SYSC_QUIRK_OPT_CLKS_NEEDED);
+}
+
+static u32 sysc_read_revision(struct sysc *ddata)
+{
+	int offset = ddata->offsets[SYSC_REVISION];
+
+	if (offset < 0)
+		return 0;
+
+	return sysc_read(ddata, offset);
+}
+
+static int sysc_get_one_clock(struct sysc *ddata, const char *name)
+{
+	int error, i, index = -ENODEV;
+
+	if (!strncmp(clock_names[SYSC_FCK], name, 3))
+		index = SYSC_FCK;
+	else if (!strncmp(clock_names[SYSC_ICK], name, 3))
+		index = SYSC_ICK;
+
+	if (index < 0) {
+		for (i = SYSC_OPTFCK0; i < SYSC_MAX_CLOCKS; i++) {
+			if (!ddata->clocks[i]) {
+				index = i;
+				break;
+			}
+		}
+	}
+
+	if (index < 0) {
+		dev_err(ddata->dev, "clock %s not added\n", name);
+		return index;
+	}
+
+	ddata->clocks[index] = devm_clk_get(ddata->dev, name);
+	if (IS_ERR(ddata->clocks[index])) {
+		if (PTR_ERR(ddata->clocks[index]) == -ENOENT)
+			return 0;
+
+		dev_err(ddata->dev, "clock get error for %s: %li\n",
+			name, PTR_ERR(ddata->clocks[index]));
+
+		return PTR_ERR(ddata->clocks[index]);
+	}
+
+	error = clk_prepare(ddata->clocks[index]);
+	if (error) {
+		dev_err(ddata->dev, "clock prepare error for %s: %i\n",
+			name, error);
+
+		return error;
+	}
+
+	return 0;
+}
+
+static int sysc_get_clocks(struct sysc *ddata)
+{
+	struct device_node *np = ddata->dev->of_node;
+	struct property *prop;
+	const char *name;
+	int nr_fck = 0, nr_ick = 0, i, error = 0;
+
+	ddata->clock_roles = devm_kcalloc(ddata->dev,
+					  SYSC_MAX_CLOCKS,
+					  sizeof(*ddata->clock_roles),
+					  GFP_KERNEL);
+	if (!ddata->clock_roles)
+		return -ENOMEM;
+
+	of_property_for_each_string(np, "clock-names", prop, name) {
+		if (!strncmp(clock_names[SYSC_FCK], name, 3))
+			nr_fck++;
+		if (!strncmp(clock_names[SYSC_ICK], name, 3))
+			nr_ick++;
+		ddata->clock_roles[ddata->nr_clocks] = name;
+		ddata->nr_clocks++;
+	}
+
+	if (ddata->nr_clocks < 1)
+		return 0;
+
+	if (ddata->nr_clocks > SYSC_MAX_CLOCKS) {
+		dev_err(ddata->dev, "too many clocks for %pOF\n", np);
+
+		return -EINVAL;
+	}
+
+	if (nr_fck > 1 || nr_ick > 1) {
+		dev_err(ddata->dev, "max one fck and ick for %pOF\n", np);
+
+		return -EINVAL;
+	}
+
+	ddata->clocks = devm_kcalloc(ddata->dev,
+				     ddata->nr_clocks, sizeof(*ddata->clocks),
+				     GFP_KERNEL);
+	if (!ddata->clocks)
+		return -ENOMEM;
+
+	for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+		const char *name = ddata->clock_roles[i];
+
+		if (!name)
+			continue;
+
+		error = sysc_get_one_clock(ddata, name);
+		if (error && error != -ENOENT)
+			return error;
+	}
+
+	return 0;
+}
+
+/**
+ * sysc_init_resets - reset module on init
+ * @ddata: device driver data
+ *
+ * A module can have both OCP softreset control and external rstctrl.
+ * If more complicated rstctrl resets are needed, please handle these
+ * directly from the child device driver and map only the module reset
+ * for the parent interconnect target module device.
+ *
+ * Automatic reset of the module on init can be skipped with the
+ * "ti,no-reset-on-init" device tree property.
+ */
+static int sysc_init_resets(struct sysc *ddata)
+{
+	int error;
+
+	ddata->rsts =
+		devm_reset_control_array_get_optional_exclusive(ddata->dev);
+	if (IS_ERR(ddata->rsts))
+		return PTR_ERR(ddata->rsts);
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+		goto deassert;
+
+	error = reset_control_assert(ddata->rsts);
+	if (error)
+		return error;
+
+deassert:
+	error = reset_control_deassert(ddata->rsts);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/**
+ * sysc_parse_and_check_child_range - parses module IO region from ranges
+ * @ddata: device driver data
+ *
+ * In general we only need rev, syss, and sysc registers and not the whole
+ * module range. But we do want the offsets for these registers from the
+ * module base. This allows us to check them against the legacy hwmod
+ * platform data. Let's also check the ranges are configured properly.
+ */
+static int sysc_parse_and_check_child_range(struct sysc *ddata)
+{
+	struct device_node *np = ddata->dev->of_node;
+	const __be32 *ranges;
+	u32 nr_addr, nr_size;
+	int len, error;
+
+	ranges = of_get_property(np, "ranges", &len);
+	if (!ranges) {
+		dev_err(ddata->dev, "missing ranges for %pOF\n", np);
+
+		return -ENOENT;
+	}
+
+	len /= sizeof(*ranges);
+
+	if (len < 3) {
+		dev_err(ddata->dev, "incomplete ranges for %pOF\n", np);
+
+		return -EINVAL;
+	}
+
+	error = of_property_read_u32(np, "#address-cells", &nr_addr);
+	if (error)
+		return -ENOENT;
+
+	error = of_property_read_u32(np, "#size-cells", &nr_size);
+	if (error)
+		return -ENOENT;
+
+	if (nr_addr != 1 || nr_size != 1) {
+		dev_err(ddata->dev, "invalid ranges for %pOF\n", np);
+
+		return -EINVAL;
+	}
+
+	ranges++;
+	ddata->module_pa = of_translate_address(np, ranges++);
+	ddata->module_size = be32_to_cpup(ranges);
+
+	return 0;
+}
+
+static struct device_node *stdout_path;
+
+static void sysc_init_stdout_path(struct sysc *ddata)
+{
+	struct device_node *np = NULL;
+	const char *uart;
+
+	if (IS_ERR(stdout_path))
+		return;
+
+	if (stdout_path)
+		return;
+
+	np = of_find_node_by_path("/chosen");
+	if (!np)
+		goto err;
+
+	uart = of_get_property(np, "stdout-path", NULL);
+	if (!uart)
+		goto err;
+
+	np = of_find_node_by_path(uart);
+	if (!np)
+		goto err;
+
+	stdout_path = np;
+
+	return;
+
+err:
+	stdout_path = ERR_PTR(-ENODEV);
+}
+
+static void sysc_check_quirk_stdout(struct sysc *ddata,
+				    struct device_node *np)
+{
+	sysc_init_stdout_path(ddata);
+	if (np != stdout_path)
+		return;
+
+	ddata->cfg.quirks |= SYSC_QUIRK_NO_IDLE_ON_INIT |
+				SYSC_QUIRK_NO_RESET_ON_INIT;
+}
+
+/**
+ * sysc_check_one_child - check child configuration
+ * @ddata: device driver data
+ * @np: child device node
+ *
+ * Let's avoid messy situations where we have new interconnect target
+ * node but children have "ti,hwmods". These belong to the interconnect
+ * target node and are managed by this driver.
+ */
+static int sysc_check_one_child(struct sysc *ddata,
+				struct device_node *np)
+{
+	const char *name;
+
+	name = of_get_property(np, "ti,hwmods", NULL);
+	if (name)
+		dev_warn(ddata->dev, "really a child ti,hwmods property?");
+
+	sysc_check_quirk_stdout(ddata, np);
+	sysc_parse_dts_quirks(ddata, np, true);
+
+	return 0;
+}
+
+static int sysc_check_children(struct sysc *ddata)
+{
+	struct device_node *child;
+	int error;
+
+	for_each_child_of_node(ddata->dev->of_node, child) {
+		error = sysc_check_one_child(ddata, child);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+/*
+ * So far only I2C uses 16-bit read access with clockactivity with revision
+ * in two registers with stride of 4. We can detect this based on the rev
+ * register size to configure things far enough to be able to properly read
+ * the revision register.
+ */
+static void sysc_check_quirk_16bit(struct sysc *ddata, struct resource *res)
+{
+	if (resource_size(res) == 8)
+		ddata->cfg.quirks |= SYSC_QUIRK_16BIT | SYSC_QUIRK_USE_CLOCKACT;
+}
+
+/**
+ * sysc_parse_one - parses the interconnect target module registers
+ * @ddata: device driver data
+ * @reg: register to parse
+ */
+static int sysc_parse_one(struct sysc *ddata, enum sysc_registers reg)
+{
+	struct resource *res;
+	const char *name;
+
+	switch (reg) {
+	case SYSC_REVISION:
+	case SYSC_SYSCONFIG:
+	case SYSC_SYSSTATUS:
+		name = reg_names[reg];
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	res = platform_get_resource_byname(to_platform_device(ddata->dev),
+					   IORESOURCE_MEM, name);
+	if (!res) {
+		ddata->offsets[reg] = -ENODEV;
+
+		return 0;
+	}
+
+	ddata->offsets[reg] = res->start - ddata->module_pa;
+	if (reg == SYSC_REVISION)
+		sysc_check_quirk_16bit(ddata, res);
+
+	return 0;
+}
+
+static int sysc_parse_registers(struct sysc *ddata)
+{
+	int i, error;
+
+	for (i = 0; i < SYSC_MAX_REGS; i++) {
+		error = sysc_parse_one(ddata, i);
+		if (error)
+			return error;
+	}
+
+	return 0;
+}
+
+/**
+ * sysc_check_registers - check for misconfigured register overlaps
+ * @ddata: device driver data
+ */
+static int sysc_check_registers(struct sysc *ddata)
+{
+	int i, j, nr_regs = 0, nr_matches = 0;
+
+	for (i = 0; i < SYSC_MAX_REGS; i++) {
+		if (ddata->offsets[i] < 0)
+			continue;
+
+		if (ddata->offsets[i] > (ddata->module_size - 4)) {
+			dev_err(ddata->dev, "register outside module range");
+
+				return -EINVAL;
+		}
+
+		for (j = 0; j < SYSC_MAX_REGS; j++) {
+			if (ddata->offsets[j] < 0)
+				continue;
+
+			if (ddata->offsets[i] == ddata->offsets[j])
+				nr_matches++;
+		}
+		nr_regs++;
+	}
+
+	if (nr_regs < 1) {
+		dev_err(ddata->dev, "missing registers\n");
+
+		return -EINVAL;
+	}
+
+	if (nr_matches > nr_regs) {
+		dev_err(ddata->dev, "overlapping registers: (%i/%i)",
+			nr_regs, nr_matches);
+
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/**
+ * syc_ioremap - ioremap register space for the interconnect target module
+ * @ddata: device driver data
+ *
+ * Note that the interconnect target module registers can be anywhere
+ * within the interconnect target module range. For example, SGX has
+ * them at offset 0x1fc00 in the 32MB module address space. And cpsw
+ * has them at offset 0x1200 in the CPSW_WR child. Usually the
+ * the interconnect target module registers are at the beginning of
+ * the module range though.
+ */
+static int sysc_ioremap(struct sysc *ddata)
+{
+	int size;
+
+	size = max3(ddata->offsets[SYSC_REVISION],
+		    ddata->offsets[SYSC_SYSCONFIG],
+		    ddata->offsets[SYSC_SYSSTATUS]);
+
+	if (size < 0 || (size + sizeof(u32)) > ddata->module_size)
+		return -EINVAL;
+
+	ddata->module_va = devm_ioremap(ddata->dev,
+					ddata->module_pa,
+					size + sizeof(u32));
+	if (!ddata->module_va)
+		return -EIO;
+
+	return 0;
+}
+
+/**
+ * sysc_map_and_check_registers - ioremap and check device registers
+ * @ddata: device driver data
+ */
+static int sysc_map_and_check_registers(struct sysc *ddata)
+{
+	int error;
+
+	error = sysc_parse_and_check_child_range(ddata);
+	if (error)
+		return error;
+
+	error = sysc_check_children(ddata);
+	if (error)
+		return error;
+
+	error = sysc_parse_registers(ddata);
+	if (error)
+		return error;
+
+	error = sysc_ioremap(ddata);
+	if (error)
+		return error;
+
+	error = sysc_check_registers(ddata);
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/**
+ * sysc_show_rev - read and show interconnect target module revision
+ * @bufp: buffer to print the information to
+ * @ddata: device driver data
+ */
+static int sysc_show_rev(char *bufp, struct sysc *ddata)
+{
+	int len;
+
+	if (ddata->offsets[SYSC_REVISION] < 0)
+		return sprintf(bufp, ":NA");
+
+	len = sprintf(bufp, ":%08x", ddata->revision);
+
+	return len;
+}
+
+static int sysc_show_reg(struct sysc *ddata,
+			 char *bufp, enum sysc_registers reg)
+{
+	if (ddata->offsets[reg] < 0)
+		return sprintf(bufp, ":NA");
+
+	return sprintf(bufp, ":%x", ddata->offsets[reg]);
+}
+
+static int sysc_show_name(char *bufp, struct sysc *ddata)
+{
+	if (!ddata->name)
+		return 0;
+
+	return sprintf(bufp, ":%s", ddata->name);
+}
+
+/**
+ * sysc_show_registers - show information about interconnect target module
+ * @ddata: device driver data
+ */
+static void sysc_show_registers(struct sysc *ddata)
+{
+	char buf[128];
+	char *bufp = buf;
+	int i;
+
+	for (i = 0; i < SYSC_MAX_REGS; i++)
+		bufp += sysc_show_reg(ddata, bufp, i);
+
+	bufp += sysc_show_rev(bufp, ddata);
+	bufp += sysc_show_name(bufp, ddata);
+
+	dev_dbg(ddata->dev, "%llx:%x%s\n",
+		ddata->module_pa, ddata->module_size,
+		buf);
+}
+
+static int __maybe_unused sysc_runtime_suspend(struct device *dev)
+{
+	struct ti_sysc_platform_data *pdata;
+	struct sysc *ddata;
+	int error = 0, i;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (!ddata->enabled)
+		return 0;
+
+	if (ddata->legacy_mode) {
+		pdata = dev_get_platdata(ddata->dev);
+		if (!pdata)
+			return 0;
+
+		if (!pdata->idle_module)
+			return -ENODEV;
+
+		error = pdata->idle_module(dev, &ddata->cookie);
+		if (error)
+			dev_err(dev, "%s: could not idle: %i\n",
+				__func__, error);
+
+		goto idled;
+	}
+
+	for (i = 0; i < ddata->nr_clocks; i++) {
+		if (IS_ERR_OR_NULL(ddata->clocks[i]))
+			continue;
+
+		if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+			break;
+
+		clk_disable(ddata->clocks[i]);
+	}
+
+idled:
+	ddata->enabled = false;
+
+	return error;
+}
+
+static int __maybe_unused sysc_runtime_resume(struct device *dev)
+{
+	struct ti_sysc_platform_data *pdata;
+	struct sysc *ddata;
+	int error = 0, i;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->enabled)
+		return 0;
+
+	if (ddata->legacy_mode) {
+		pdata = dev_get_platdata(ddata->dev);
+		if (!pdata)
+			return 0;
+
+		if (!pdata->enable_module)
+			return -ENODEV;
+
+		error = pdata->enable_module(dev, &ddata->cookie);
+		if (error)
+			dev_err(dev, "%s: could not enable: %i\n",
+				__func__, error);
+
+		goto awake;
+	}
+
+	for (i = 0; i < ddata->nr_clocks; i++) {
+		if (IS_ERR_OR_NULL(ddata->clocks[i]))
+			continue;
+
+		if (i >= SYSC_OPTFCK0 && !sysc_opt_clks_needed(ddata))
+			break;
+
+		error = clk_enable(ddata->clocks[i]);
+		if (error)
+			return error;
+	}
+
+awake:
+	ddata->enabled = true;
+
+	return error;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sysc_suspend(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+				 SYSC_QUIRK_LEGACY_IDLE))
+		return 0;
+
+	if (!ddata->enabled)
+		return 0;
+
+	dev_dbg(ddata->dev, "%s %s\n", __func__,
+		ddata->name ? ddata->name : "");
+
+	error = pm_runtime_put_sync_suspend(dev);
+	if (error < 0) {
+		dev_warn(ddata->dev, "%s not idle %i %s\n",
+			 __func__, error,
+			 ddata->name ? ddata->name : "");
+
+		return 0;
+	}
+
+	ddata->needs_resume = true;
+
+	return 0;
+}
+
+static int sysc_resume(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & (SYSC_QUIRK_RESOURCE_PROVIDER |
+				 SYSC_QUIRK_LEGACY_IDLE))
+		return 0;
+
+	if (ddata->needs_resume) {
+		dev_dbg(ddata->dev, "%s %s\n", __func__,
+			ddata->name ? ddata->name : "");
+
+		error = pm_runtime_get_sync(dev);
+		if (error < 0) {
+			dev_err(ddata->dev, "%s  error %i %s\n",
+				__func__, error,
+				 ddata->name ? ddata->name : "");
+
+			return error;
+		}
+
+		ddata->needs_resume = false;
+	}
+
+	return 0;
+}
+
+static int sysc_noirq_suspend(struct device *dev)
+{
+	struct sysc *ddata;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+		return 0;
+
+	if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+		return 0;
+
+	if (!ddata->enabled)
+		return 0;
+
+	dev_dbg(ddata->dev, "%s %s\n", __func__,
+		ddata->name ? ddata->name : "");
+
+	ddata->needs_resume = true;
+
+	return sysc_runtime_suspend(dev);
+}
+
+static int sysc_noirq_resume(struct device *dev)
+{
+	struct sysc *ddata;
+
+	ddata = dev_get_drvdata(dev);
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+		return 0;
+
+	if (!(ddata->cfg.quirks & SYSC_QUIRK_RESOURCE_PROVIDER))
+		return 0;
+
+	if (ddata->needs_resume) {
+		dev_dbg(ddata->dev, "%s %s\n", __func__,
+			ddata->name ? ddata->name : "");
+
+		ddata->needs_resume = false;
+
+		return sysc_runtime_resume(dev);
+	}
+
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops sysc_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(sysc_suspend, sysc_resume)
+	SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_noirq_suspend, sysc_noirq_resume)
+	SET_RUNTIME_PM_OPS(sysc_runtime_suspend,
+			   sysc_runtime_resume,
+			   NULL)
+};
+
+/* Module revision register based quirks */
+struct sysc_revision_quirk {
+	const char *name;
+	u32 base;
+	int rev_offset;
+	int sysc_offset;
+	int syss_offset;
+	u32 revision;
+	u32 revision_mask;
+	u32 quirks;
+};
+
+#define SYSC_QUIRK(optname, optbase, optrev, optsysc, optsyss,		\
+		   optrev_val, optrevmask, optquirkmask)		\
+	{								\
+		.name = (optname),					\
+		.base = (optbase),					\
+		.rev_offset = (optrev),					\
+		.sysc_offset = (optsysc),				\
+		.syss_offset = (optsyss),				\
+		.revision = (optrev_val),				\
+		.revision_mask = (optrevmask),				\
+		.quirks = (optquirkmask),				\
+	}
+
+static const struct sysc_revision_quirk sysc_revision_quirks[] = {
+	/* These need to use noirq_suspend */
+	SYSC_QUIRK("control", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("i2c", 0, 0, 0x10, 0x90, 0x5040000a, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("mcspi", 0, 0, 0x10, -1, 0x40300a0b, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("prcm", 0, 0, -1, -1, 0x40000100, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("ocp2scp", 0, 0, 0x10, 0x14, 0x50060005, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("padconf", 0, 0, 0x10, -1, 0x4fff0800, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("scm", 0, 0, 0x10, -1, 0x40000900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("scrm", 0, 0, -1, -1, 0x00000010, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+	SYSC_QUIRK("sdma", 0, 0, 0x2c, 0x28, 0x00010900, 0xffffffff,
+		   SYSC_QUIRK_RESOURCE_PROVIDER),
+
+	/* These drivers need to be fixed to not use pm_runtime_irq_safe() */
+	SYSC_QUIRK("gpio", 0, 0, 0x10, 0x114, 0x50600801, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_OPT_CLKS_IN_RESET),
+	SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("mmu", 0, 0, 0x10, 0x14, 0x00000030, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("sham", 0, 0x100, 0x110, 0x114, 0x40000c03, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("smartreflex", 0, -1, 0x24, -1, 0x00000000, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("smartreflex", 0, -1, 0x38, -1, 0x00000000, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("timer", 0, 0, 0x10, 0x14, 0x00000015, 0xffffffff,
+		   0),
+	/* Some timers on omap4 and later */
+	SYSC_QUIRK("timer", 0, 0, 0x10, -1, 0x4fff1301, 0xffffffff,
+		   0),
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x00000052, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	/* Uarts on omap4 and later */
+	SYSC_QUIRK("uart", 0, 0x50, 0x54, 0x58, 0x50411e03, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+
+	/* These devices don't yet suspend properly without legacy setting */
+	SYSC_QUIRK("sdio", 0, 0, 0x10, -1, 0x40202301, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0500, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+	SYSC_QUIRK("wdt", 0, 0, 0x10, 0x14, 0x502a0d00, 0xffffffff,
+		   SYSC_QUIRK_LEGACY_IDLE),
+
+#ifdef DEBUG
+	SYSC_QUIRK("aess", 0, 0, 0x10, -1, 0x40000000, 0xffffffff, 0),
+	SYSC_QUIRK("gpu", 0, 0x1fc00, 0x1fc10, -1, 0, 0, 0),
+	SYSC_QUIRK("hdq1w", 0, 0, 0x14, 0x18, 0x00000006, 0xffffffff, 0),
+	SYSC_QUIRK("hsi", 0, 0, 0x10, 0x14, 0x50043101, 0xffffffff, 0),
+	SYSC_QUIRK("iss", 0, 0, 0x10, -1, 0x40000101, 0xffffffff, 0),
+	SYSC_QUIRK("mcasp", 0, 0, 0x4, -1, 0x44306302, 0xffffffff, 0),
+	SYSC_QUIRK("mcbsp", 0, -1, 0x8c, -1, 0, 0, 0),
+	SYSC_QUIRK("mailbox", 0, 0, 0x10, -1, 0x00000400, 0xffffffff, 0),
+	SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40000902, 0xffffffff, 0),
+	SYSC_QUIRK("slimbus", 0, 0, 0x10, -1, 0x40002903, 0xffffffff, 0),
+	SYSC_QUIRK("spinlock", 0, 0, 0x10, -1, 0x50020000, 0xffffffff, 0),
+	SYSC_QUIRK("usbhstll", 0, 0, 0x10, 0x14, 0x00000004, 0xffffffff, 0),
+	SYSC_QUIRK("usb_host_hs", 0, 0, 0x10, 0x14, 0x50700100, 0xffffffff, 0),
+	SYSC_QUIRK("usb_otg_hs", 0, 0x400, 0x404, 0x408, 0x00000050,
+		   0xffffffff, 0),
+#endif
+};
+
+static void sysc_init_revision_quirks(struct sysc *ddata)
+{
+	const struct sysc_revision_quirk *q;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(sysc_revision_quirks); i++) {
+		q = &sysc_revision_quirks[i];
+
+		if (q->base && q->base != ddata->module_pa)
+			continue;
+
+		if (q->rev_offset >= 0 &&
+		    q->rev_offset != ddata->offsets[SYSC_REVISION])
+			continue;
+
+		if (q->sysc_offset >= 0 &&
+		    q->sysc_offset != ddata->offsets[SYSC_SYSCONFIG])
+			continue;
+
+		if (q->syss_offset >= 0 &&
+		    q->syss_offset != ddata->offsets[SYSC_SYSSTATUS])
+			continue;
+
+		if (q->revision == ddata->revision ||
+		    (q->revision & q->revision_mask) ==
+		    (ddata->revision & q->revision_mask)) {
+			ddata->name = q->name;
+			ddata->cfg.quirks |= q->quirks;
+		}
+	}
+}
+
+static int sysc_reset(struct sysc *ddata)
+{
+	int offset = ddata->offsets[SYSC_SYSCONFIG];
+	int val;
+
+	if (ddata->legacy_mode || offset < 0 ||
+	    ddata->cfg.quirks & SYSC_QUIRK_NO_RESET_ON_INIT)
+		return 0;
+
+	/*
+	 * Currently only support reset status in sysstatus.
+	 * Warn and return error in all other cases
+	 */
+	if (!ddata->cfg.syss_mask) {
+		dev_err(ddata->dev, "No ti,syss-mask. Reset failed\n");
+		return -EINVAL;
+	}
+
+	val = sysc_read(ddata, offset);
+	val |= (0x1 << ddata->cap->regbits->srst_shift);
+	sysc_write(ddata, offset, val);
+
+	/* Poll on reset status */
+	offset = ddata->offsets[SYSC_SYSSTATUS];
+
+	return readl_poll_timeout(ddata->module_va + offset, val,
+				  (val & ddata->cfg.syss_mask) == 0x0,
+				  100, MAX_MODULE_SOFTRESET_WAIT);
+}
+
+/* At this point the module is configured enough to read the revision */
+static int sysc_init_module(struct sysc *ddata)
+{
+	int error;
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_NO_IDLE_ON_INIT) {
+		ddata->revision = sysc_read_revision(ddata);
+		goto rev_quirks;
+	}
+
+	error = pm_runtime_get_sync(ddata->dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(ddata->dev);
+
+		return 0;
+	}
+
+	error = sysc_reset(ddata);
+	if (error) {
+		dev_err(ddata->dev, "Reset failed with %d\n", error);
+		pm_runtime_put_sync(ddata->dev);
+
+		return error;
+	}
+
+	ddata->revision = sysc_read_revision(ddata);
+	pm_runtime_put_sync(ddata->dev);
+
+rev_quirks:
+	sysc_init_revision_quirks(ddata);
+
+	return 0;
+}
+
+static int sysc_init_sysc_mask(struct sysc *ddata)
+{
+	struct device_node *np = ddata->dev->of_node;
+	int error;
+	u32 val;
+
+	error = of_property_read_u32(np, "ti,sysc-mask", &val);
+	if (error)
+		return 0;
+
+	ddata->cfg.sysc_val = val & ddata->cap->sysc_mask;
+
+	return 0;
+}
+
+static int sysc_init_idlemode(struct sysc *ddata, u8 *idlemodes,
+			      const char *name)
+{
+	struct device_node *np = ddata->dev->of_node;
+	struct property *prop;
+	const __be32 *p;
+	u32 val;
+
+	of_property_for_each_u32(np, name, prop, p, val) {
+		if (val >= SYSC_NR_IDLEMODES) {
+			dev_err(ddata->dev, "invalid idlemode: %i\n", val);
+			return -EINVAL;
+		}
+		*idlemodes |=  (1 << val);
+	}
+
+	return 0;
+}
+
+static int sysc_init_idlemodes(struct sysc *ddata)
+{
+	int error;
+
+	error = sysc_init_idlemode(ddata, &ddata->cfg.midlemodes,
+				   "ti,sysc-midle");
+	if (error)
+		return error;
+
+	error = sysc_init_idlemode(ddata, &ddata->cfg.sidlemodes,
+				   "ti,sysc-sidle");
+	if (error)
+		return error;
+
+	return 0;
+}
+
+/*
+ * Only some devices on omap4 and later have SYSCONFIG reset done
+ * bit. We can detect this if there is no SYSSTATUS at all, or the
+ * SYSTATUS bit 0 is not used. Note that some SYSSTATUS registers
+ * have multiple bits for the child devices like OHCI and EHCI.
+ * Depends on SYSC being parsed first.
+ */
+static int sysc_init_syss_mask(struct sysc *ddata)
+{
+	struct device_node *np = ddata->dev->of_node;
+	int error;
+	u32 val;
+
+	error = of_property_read_u32(np, "ti,syss-mask", &val);
+	if (error) {
+		if ((ddata->cap->type == TI_SYSC_OMAP4 ||
+		     ddata->cap->type == TI_SYSC_OMAP4_TIMER) &&
+		    (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
+			ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
+
+		return 0;
+	}
+
+	if (!(val & 1) && (ddata->cfg.sysc_val & SYSC_OMAP4_SOFTRESET))
+		ddata->cfg.quirks |= SYSC_QUIRK_RESET_STATUS;
+
+	ddata->cfg.syss_mask = val;
+
+	return 0;
+}
+
+/*
+ * Many child device drivers need to have fck and opt clocks available
+ * to get the clock rate for device internal configuration etc.
+ */
+static int sysc_child_add_named_clock(struct sysc *ddata,
+				      struct device *child,
+				      const char *name)
+{
+	struct clk *clk;
+	struct clk_lookup *l;
+	int error = 0;
+
+	if (!name)
+		return 0;
+
+	clk = clk_get(child, name);
+	if (!IS_ERR(clk)) {
+		clk_put(clk);
+
+		return -EEXIST;
+	}
+
+	clk = clk_get(ddata->dev, name);
+	if (IS_ERR(clk))
+		return -ENODEV;
+
+	l = clkdev_create(clk, name, dev_name(child));
+	if (!l)
+		error = -ENOMEM;
+
+	clk_put(clk);
+
+	return error;
+}
+
+static int sysc_child_add_clocks(struct sysc *ddata,
+				 struct device *child)
+{
+	int i, error;
+
+	for (i = 0; i < ddata->nr_clocks; i++) {
+		error = sysc_child_add_named_clock(ddata,
+						   child,
+						   ddata->clock_roles[i]);
+		if (error && error != -EEXIST) {
+			dev_err(ddata->dev, "could not add child clock %s: %i\n",
+				ddata->clock_roles[i], error);
+
+			return error;
+		}
+	}
+
+	return 0;
+}
+
+static struct device_type sysc_device_type = {
+};
+
+static struct sysc *sysc_child_to_parent(struct device *dev)
+{
+	struct device *parent = dev->parent;
+
+	if (!parent || parent->type != &sysc_device_type)
+		return NULL;
+
+	return dev_get_drvdata(parent);
+}
+
+static int __maybe_unused sysc_child_runtime_suspend(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = sysc_child_to_parent(dev);
+
+	error = pm_generic_runtime_suspend(dev);
+	if (error)
+		return error;
+
+	if (!ddata->enabled)
+		return 0;
+
+	return sysc_runtime_suspend(ddata->dev);
+}
+
+static int __maybe_unused sysc_child_runtime_resume(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = sysc_child_to_parent(dev);
+
+	if (!ddata->enabled) {
+		error = sysc_runtime_resume(ddata->dev);
+		if (error < 0)
+			dev_err(ddata->dev,
+				"%s error: %i\n", __func__, error);
+	}
+
+	return pm_generic_runtime_resume(dev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int sysc_child_suspend_noirq(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = sysc_child_to_parent(dev);
+
+	dev_dbg(ddata->dev, "%s %s\n", __func__,
+		ddata->name ? ddata->name : "");
+
+	error = pm_generic_suspend_noirq(dev);
+	if (error) {
+		dev_err(dev, "%s error at %i: %i\n",
+			__func__, __LINE__, error);
+
+		return error;
+	}
+
+	if (!pm_runtime_status_suspended(dev)) {
+		error = pm_generic_runtime_suspend(dev);
+		if (error) {
+			dev_warn(dev, "%s busy at %i: %i\n",
+				 __func__, __LINE__, error);
+
+			return 0;
+		}
+
+		error = sysc_runtime_suspend(ddata->dev);
+		if (error) {
+			dev_err(dev, "%s error at %i: %i\n",
+				__func__, __LINE__, error);
+
+			return error;
+		}
+
+		ddata->child_needs_resume = true;
+	}
+
+	return 0;
+}
+
+static int sysc_child_resume_noirq(struct device *dev)
+{
+	struct sysc *ddata;
+	int error;
+
+	ddata = sysc_child_to_parent(dev);
+
+	dev_dbg(ddata->dev, "%s %s\n", __func__,
+		ddata->name ? ddata->name : "");
+
+	if (ddata->child_needs_resume) {
+		ddata->child_needs_resume = false;
+
+		error = sysc_runtime_resume(ddata->dev);
+		if (error)
+			dev_err(ddata->dev,
+				"%s runtime resume error: %i\n",
+				__func__, error);
+
+		error = pm_generic_runtime_resume(dev);
+		if (error)
+			dev_err(ddata->dev,
+				"%s generic runtime resume: %i\n",
+				__func__, error);
+	}
+
+	return pm_generic_resume_noirq(dev);
+}
+#endif
+
+struct dev_pm_domain sysc_child_pm_domain = {
+	.ops = {
+		SET_RUNTIME_PM_OPS(sysc_child_runtime_suspend,
+				   sysc_child_runtime_resume,
+				   NULL)
+		USE_PLATFORM_PM_SLEEP_OPS
+		SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(sysc_child_suspend_noirq,
+					      sysc_child_resume_noirq)
+	}
+};
+
+/**
+ * sysc_legacy_idle_quirk - handle children in omap_device compatible way
+ * @ddata: device driver data
+ * @child: child device driver
+ *
+ * Allow idle for child devices as done with _od_runtime_suspend().
+ * Otherwise many child devices will not idle because of the permanent
+ * parent usecount set in pm_runtime_irq_safe().
+ *
+ * Note that the long term solution is to just modify the child device
+ * drivers to not set pm_runtime_irq_safe() and then this can be just
+ * dropped.
+ */
+static void sysc_legacy_idle_quirk(struct sysc *ddata, struct device *child)
+{
+	if (!ddata->legacy_mode)
+		return;
+
+	if (ddata->cfg.quirks & SYSC_QUIRK_LEGACY_IDLE)
+		dev_pm_domain_set(child, &sysc_child_pm_domain);
+}
+
+static int sysc_notifier_call(struct notifier_block *nb,
+			      unsigned long event, void *device)
+{
+	struct device *dev = device;
+	struct sysc *ddata;
+	int error;
+
+	ddata = sysc_child_to_parent(dev);
+	if (!ddata)
+		return NOTIFY_DONE;
+
+	switch (event) {
+	case BUS_NOTIFY_ADD_DEVICE:
+		error = sysc_child_add_clocks(ddata, dev);
+		if (error)
+			return error;
+		sysc_legacy_idle_quirk(ddata, dev);
+		break;
+	default:
+		break;
+	}
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block sysc_nb = {
+	.notifier_call = sysc_notifier_call,
+};
+
+/* Device tree configured quirks */
+struct sysc_dts_quirk {
+	const char *name;
+	u32 mask;
+};
+
+static const struct sysc_dts_quirk sysc_dts_quirks[] = {
+	{ .name = "ti,no-idle-on-init",
+	  .mask = SYSC_QUIRK_NO_IDLE_ON_INIT, },
+	{ .name = "ti,no-reset-on-init",
+	  .mask = SYSC_QUIRK_NO_RESET_ON_INIT, },
+};
+
+static void sysc_parse_dts_quirks(struct sysc *ddata, struct device_node *np,
+				  bool is_child)
+{
+	const struct property *prop;
+	int i, len;
+
+	for (i = 0; i < ARRAY_SIZE(sysc_dts_quirks); i++) {
+		const char *name = sysc_dts_quirks[i].name;
+
+		prop = of_get_property(np, name, &len);
+		if (!prop)
+			continue;
+
+		ddata->cfg.quirks |= sysc_dts_quirks[i].mask;
+		if (is_child) {
+			dev_warn(ddata->dev,
+				 "dts flag should be at module level for %s\n",
+				 name);
+		}
+	}
+}
+
+static int sysc_init_dts_quirks(struct sysc *ddata)
+{
+	struct device_node *np = ddata->dev->of_node;
+	int error;
+	u32 val;
+
+	ddata->legacy_mode = of_get_property(np, "ti,hwmods", NULL);
+
+	sysc_parse_dts_quirks(ddata, np, false);
+	error = of_property_read_u32(np, "ti,sysc-delay-us", &val);
+	if (!error) {
+		if (val > 255) {
+			dev_warn(ddata->dev, "bad ti,sysc-delay-us: %i\n",
+				 val);
+		}
+
+		ddata->cfg.srst_udelay = (u8)val;
+	}
+
+	return 0;
+}
+
+static void sysc_unprepare(struct sysc *ddata)
+{
+	int i;
+
+	if (!ddata->clocks)
+		return;
+
+	for (i = 0; i < SYSC_MAX_CLOCKS; i++) {
+		if (!IS_ERR_OR_NULL(ddata->clocks[i]))
+			clk_unprepare(ddata->clocks[i]);
+	}
+}
+
+/*
+ * Common sysc register bits found on omap2, also known as type1
+ */
+static const struct sysc_regbits sysc_regbits_omap2 = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = 12,
+	.sidle_shift = 3,
+	.clkact_shift = 8,
+	.emufree_shift = 5,
+	.enwkup_shift = 2,
+	.srst_shift = 1,
+	.autoidle_shift = 0,
+};
+
+static const struct sysc_capabilities sysc_omap2 = {
+	.type = TI_SYSC_OMAP2,
+	.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
+		     SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
+		     SYSC_OMAP2_AUTOIDLE,
+	.regbits = &sysc_regbits_omap2,
+};
+
+/* All omap2 and 3 timers, and timers 1, 2 & 10 on omap 4 and 5 */
+static const struct sysc_capabilities sysc_omap2_timer = {
+	.type = TI_SYSC_OMAP2_TIMER,
+	.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY | SYSC_OMAP2_EMUFREE |
+		     SYSC_OMAP2_ENAWAKEUP | SYSC_OMAP2_SOFTRESET |
+		     SYSC_OMAP2_AUTOIDLE,
+	.regbits = &sysc_regbits_omap2,
+	.mod_quirks = SYSC_QUIRK_USE_CLOCKACT,
+};
+
+/*
+ * SHAM2 (SHA1/MD5) sysc found on omap3, a variant of sysc_regbits_omap2
+ * with different sidle position
+ */
+static const struct sysc_regbits sysc_regbits_omap3_sham = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = 4,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = -ENODEV,
+	.srst_shift = 1,
+	.autoidle_shift = 0,
+	.emufree_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap3_sham = {
+	.type = TI_SYSC_OMAP3_SHAM,
+	.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
+	.regbits = &sysc_regbits_omap3_sham,
+};
+
+/*
+ * AES register bits found on omap3 and later, a variant of
+ * sysc_regbits_omap2 with different sidle position
+ */
+static const struct sysc_regbits sysc_regbits_omap3_aes = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = 6,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = -ENODEV,
+	.srst_shift = 1,
+	.autoidle_shift = 0,
+	.emufree_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap3_aes = {
+	.type = TI_SYSC_OMAP3_AES,
+	.sysc_mask = SYSC_OMAP2_SOFTRESET | SYSC_OMAP2_AUTOIDLE,
+	.regbits = &sysc_regbits_omap3_aes,
+};
+
+/*
+ * Common sysc register bits found on omap4, also known as type2
+ */
+static const struct sysc_regbits sysc_regbits_omap4 = {
+	.dmadisable_shift = 16,
+	.midle_shift = 4,
+	.sidle_shift = 2,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = -ENODEV,
+	.emufree_shift = 1,
+	.srst_shift = 0,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4 = {
+	.type = TI_SYSC_OMAP4,
+	.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
+		     SYSC_OMAP4_SOFTRESET,
+	.regbits = &sysc_regbits_omap4,
+};
+
+static const struct sysc_capabilities sysc_omap4_timer = {
+	.type = TI_SYSC_OMAP4_TIMER,
+	.sysc_mask = SYSC_OMAP4_DMADISABLE | SYSC_OMAP4_FREEEMU |
+		     SYSC_OMAP4_SOFTRESET,
+	.regbits = &sysc_regbits_omap4,
+};
+
+/*
+ * Common sysc register bits found on omap4, also known as type3
+ */
+static const struct sysc_regbits sysc_regbits_omap4_simple = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = 2,
+	.sidle_shift = 0,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = -ENODEV,
+	.srst_shift = -ENODEV,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_simple = {
+	.type = TI_SYSC_OMAP4_SIMPLE,
+	.regbits = &sysc_regbits_omap4_simple,
+};
+
+/*
+ * SmartReflex sysc found on omap34xx
+ */
+static const struct sysc_regbits sysc_regbits_omap34xx_sr = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = -ENODEV,
+	.clkact_shift = 20,
+	.enwkup_shift = -ENODEV,
+	.srst_shift = -ENODEV,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_34xx_sr = {
+	.type = TI_SYSC_OMAP34XX_SR,
+	.sysc_mask = SYSC_OMAP2_CLOCKACTIVITY,
+	.regbits = &sysc_regbits_omap34xx_sr,
+	.mod_quirks = SYSC_QUIRK_USE_CLOCKACT | SYSC_QUIRK_UNCACHED |
+		      SYSC_QUIRK_LEGACY_IDLE,
+};
+
+/*
+ * SmartReflex sysc found on omap36xx and later
+ */
+static const struct sysc_regbits sysc_regbits_omap36xx_sr = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = 24,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = 26,
+	.srst_shift = -ENODEV,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_36xx_sr = {
+	.type = TI_SYSC_OMAP36XX_SR,
+	.sysc_mask = SYSC_OMAP3_SR_ENAWAKEUP,
+	.regbits = &sysc_regbits_omap36xx_sr,
+	.mod_quirks = SYSC_QUIRK_UNCACHED | SYSC_QUIRK_LEGACY_IDLE,
+};
+
+static const struct sysc_capabilities sysc_omap4_sr = {
+	.type = TI_SYSC_OMAP4_SR,
+	.regbits = &sysc_regbits_omap36xx_sr,
+	.mod_quirks = SYSC_QUIRK_LEGACY_IDLE,
+};
+
+/*
+ * McASP register bits found on omap4 and later
+ */
+static const struct sysc_regbits sysc_regbits_omap4_mcasp = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = 0,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = -ENODEV,
+	.srst_shift = -ENODEV,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_mcasp = {
+	.type = TI_SYSC_OMAP4_MCASP,
+	.regbits = &sysc_regbits_omap4_mcasp,
+	.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
+};
+
+/*
+ * McASP found on dra7 and later
+ */
+static const struct sysc_capabilities sysc_dra7_mcasp = {
+	.type = TI_SYSC_OMAP4_SIMPLE,
+	.regbits = &sysc_regbits_omap4_simple,
+	.mod_quirks = SYSC_QUIRK_OPT_CLKS_NEEDED,
+};
+
+/*
+ * FS USB host found on omap4 and later
+ */
+static const struct sysc_regbits sysc_regbits_omap4_usb_host_fs = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = 24,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = 26,
+	.srst_shift = -ENODEV,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_omap4_usb_host_fs = {
+	.type = TI_SYSC_OMAP4_USB_HOST_FS,
+	.sysc_mask = SYSC_OMAP2_ENAWAKEUP,
+	.regbits = &sysc_regbits_omap4_usb_host_fs,
+};
+
+static const struct sysc_regbits sysc_regbits_dra7_mcan = {
+	.dmadisable_shift = -ENODEV,
+	.midle_shift = -ENODEV,
+	.sidle_shift = -ENODEV,
+	.clkact_shift = -ENODEV,
+	.enwkup_shift = 4,
+	.srst_shift = 0,
+	.emufree_shift = -ENODEV,
+	.autoidle_shift = -ENODEV,
+};
+
+static const struct sysc_capabilities sysc_dra7_mcan = {
+	.type = TI_SYSC_DRA7_MCAN,
+	.sysc_mask = SYSC_DRA7_MCAN_ENAWAKEUP | SYSC_OMAP4_SOFTRESET,
+	.regbits = &sysc_regbits_dra7_mcan,
+};
+
+static int sysc_init_pdata(struct sysc *ddata)
+{
+	struct ti_sysc_platform_data *pdata = dev_get_platdata(ddata->dev);
+	struct ti_sysc_module_data mdata;
+	int error = 0;
+
+	if (!pdata || !ddata->legacy_mode)
+		return 0;
+
+	mdata.name = ddata->legacy_mode;
+	mdata.module_pa = ddata->module_pa;
+	mdata.module_size = ddata->module_size;
+	mdata.offsets = ddata->offsets;
+	mdata.nr_offsets = SYSC_MAX_REGS;
+	mdata.cap = ddata->cap;
+	mdata.cfg = &ddata->cfg;
+
+	if (!pdata->init_module)
+		return -ENODEV;
+
+	error = pdata->init_module(ddata->dev, &mdata, &ddata->cookie);
+	if (error == -EEXIST)
+		error = 0;
+
+	return error;
+}
+
+static int sysc_init_match(struct sysc *ddata)
+{
+	const struct sysc_capabilities *cap;
+
+	cap = of_device_get_match_data(ddata->dev);
+	if (!cap)
+		return -EINVAL;
+
+	ddata->cap = cap;
+	if (ddata->cap)
+		ddata->cfg.quirks |= ddata->cap->mod_quirks;
+
+	return 0;
+}
+
+static void ti_sysc_idle(struct work_struct *work)
+{
+	struct sysc *ddata;
+
+	ddata = container_of(work, struct sysc, idle_work.work);
+
+	if (pm_runtime_active(ddata->dev))
+		pm_runtime_put_sync(ddata->dev);
+}
+
+static const struct of_device_id sysc_match_table[] = {
+	{ .compatible = "simple-bus", },
+	{ /* sentinel */ },
+};
+
+static int sysc_probe(struct platform_device *pdev)
+{
+	struct ti_sysc_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct sysc *ddata;
+	int error;
+
+	ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+	if (!ddata)
+		return -ENOMEM;
+
+	ddata->dev = &pdev->dev;
+	platform_set_drvdata(pdev, ddata);
+
+	error = sysc_init_match(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_dts_quirks(ddata);
+	if (error)
+		return error;
+
+	error = sysc_get_clocks(ddata);
+	if (error)
+		return error;
+
+	error = sysc_map_and_check_registers(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_sysc_mask(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_idlemodes(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_syss_mask(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_pdata(ddata);
+	if (error)
+		return error;
+
+	error = sysc_init_resets(ddata);
+	if (error)
+		goto unprepare;
+
+	pm_runtime_enable(ddata->dev);
+	error = sysc_init_module(ddata);
+	if (error)
+		goto unprepare;
+
+	error = pm_runtime_get_sync(ddata->dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(ddata->dev);
+		pm_runtime_disable(ddata->dev);
+		goto unprepare;
+	}
+
+	sysc_show_registers(ddata);
+
+	ddata->dev->type = &sysc_device_type;
+	error = of_platform_populate(ddata->dev->of_node, sysc_match_table,
+				     pdata ? pdata->auxdata : NULL,
+				     ddata->dev);
+	if (error)
+		goto err;
+
+	INIT_DELAYED_WORK(&ddata->idle_work, ti_sysc_idle);
+
+	/* At least earlycon won't survive without deferred idle */
+	if (ddata->cfg.quirks & (SYSC_QUIRK_NO_IDLE_ON_INIT |
+				 SYSC_QUIRK_NO_RESET_ON_INIT)) {
+		schedule_delayed_work(&ddata->idle_work, 3000);
+	} else {
+		pm_runtime_put(&pdev->dev);
+	}
+
+	if (!of_get_available_child_count(ddata->dev->of_node))
+		reset_control_assert(ddata->rsts);
+
+	return 0;
+
+err:
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+unprepare:
+	sysc_unprepare(ddata);
+
+	return error;
+}
+
+static int sysc_remove(struct platform_device *pdev)
+{
+	struct sysc *ddata = platform_get_drvdata(pdev);
+	int error;
+
+	/* Device can still be enabled, see deferred idle quirk in probe */
+	if (cancel_delayed_work_sync(&ddata->idle_work))
+		ti_sysc_idle(&ddata->idle_work.work);
+
+	error = pm_runtime_get_sync(ddata->dev);
+	if (error < 0) {
+		pm_runtime_put_noidle(ddata->dev);
+		pm_runtime_disable(ddata->dev);
+		goto unprepare;
+	}
+
+	of_platform_depopulate(&pdev->dev);
+
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	if (!reset_control_status(ddata->rsts))
+		reset_control_assert(ddata->rsts);
+
+unprepare:
+	sysc_unprepare(ddata);
+
+	return 0;
+}
+
+static const struct of_device_id sysc_match[] = {
+	{ .compatible = "ti,sysc-omap2", .data = &sysc_omap2, },
+	{ .compatible = "ti,sysc-omap2-timer", .data = &sysc_omap2_timer, },
+	{ .compatible = "ti,sysc-omap4", .data = &sysc_omap4, },
+	{ .compatible = "ti,sysc-omap4-timer", .data = &sysc_omap4_timer, },
+	{ .compatible = "ti,sysc-omap4-simple", .data = &sysc_omap4_simple, },
+	{ .compatible = "ti,sysc-omap3430-sr", .data = &sysc_34xx_sr, },
+	{ .compatible = "ti,sysc-omap3630-sr", .data = &sysc_36xx_sr, },
+	{ .compatible = "ti,sysc-omap4-sr", .data = &sysc_omap4_sr, },
+	{ .compatible = "ti,sysc-omap3-sham", .data = &sysc_omap3_sham, },
+	{ .compatible = "ti,sysc-omap-aes", .data = &sysc_omap3_aes, },
+	{ .compatible = "ti,sysc-mcasp", .data = &sysc_omap4_mcasp, },
+	{ .compatible = "ti,sysc-dra7-mcasp", .data = &sysc_dra7_mcasp, },
+	{ .compatible = "ti,sysc-usb-host-fs",
+	  .data = &sysc_omap4_usb_host_fs, },
+	{ .compatible = "ti,sysc-dra7-mcan", .data = &sysc_dra7_mcan, },
+	{  },
+};
+MODULE_DEVICE_TABLE(of, sysc_match);
+
+static struct platform_driver sysc_driver = {
+	.probe		= sysc_probe,
+	.remove		= sysc_remove,
+	.driver         = {
+		.name   = "ti-sysc",
+		.of_match_table	= sysc_match,
+		.pm = &sysc_pm_ops,
+	},
+};
+
+static int __init sysc_init(void)
+{
+	bus_register_notifier(&platform_bus_type, &sysc_nb);
+
+	return platform_driver_register(&sysc_driver);
+}
+module_init(sysc_init);
+
+static void __exit sysc_exit(void)
+{
+	bus_unregister_notifier(&platform_bus_type, &sysc_nb);
+	platform_driver_unregister(&sysc_driver);
+}
+module_exit(sysc_exit);
+
+MODULE_DESCRIPTION("TI sysc interconnect target driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/ts-nbus.c b/drivers/bus/ts-nbus.c
new file mode 100644
index 000000000..073fd9011
--- /dev/null
+++ b/drivers/bus/ts-nbus.c
@@ -0,0 +1,375 @@
+/*
+ * NBUS driver for TS-4600 based boards
+ *
+ * Copyright (c) 2016 - Savoir-faire Linux
+ * Author: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2. This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * This driver implements a GPIOs bit-banged bus, called the NBUS by Technologic
+ * Systems. It is used to communicate with the peripherals in the FPGA on the
+ * TS-4600 SoM.
+ */
+
+#include <linux/bitops.h>
+#include <linux/gpio/consumer.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pwm.h>
+#include <linux/ts-nbus.h>
+
+#define TS_NBUS_DIRECTION_IN  0
+#define TS_NBUS_DIRECTION_OUT 1
+#define TS_NBUS_WRITE_ADR 0
+#define TS_NBUS_WRITE_VAL 1
+
+struct ts_nbus {
+	struct pwm_device *pwm;
+	struct gpio_descs *data;
+	struct gpio_desc *csn;
+	struct gpio_desc *txrx;
+	struct gpio_desc *strobe;
+	struct gpio_desc *ale;
+	struct gpio_desc *rdy;
+	struct mutex lock;
+};
+
+/*
+ * request all gpios required by the bus.
+ */
+static int ts_nbus_init_pdata(struct platform_device *pdev, struct ts_nbus
+		*ts_nbus)
+{
+	ts_nbus->data = devm_gpiod_get_array(&pdev->dev, "ts,data",
+			GPIOD_OUT_HIGH);
+	if (IS_ERR(ts_nbus->data)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,data-gpio from dts\n");
+		return PTR_ERR(ts_nbus->data);
+	}
+
+	ts_nbus->csn = devm_gpiod_get(&pdev->dev, "ts,csn", GPIOD_OUT_HIGH);
+	if (IS_ERR(ts_nbus->csn)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,csn-gpio from dts\n");
+		return PTR_ERR(ts_nbus->csn);
+	}
+
+	ts_nbus->txrx = devm_gpiod_get(&pdev->dev, "ts,txrx", GPIOD_OUT_HIGH);
+	if (IS_ERR(ts_nbus->txrx)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,txrx-gpio from dts\n");
+		return PTR_ERR(ts_nbus->txrx);
+	}
+
+	ts_nbus->strobe = devm_gpiod_get(&pdev->dev, "ts,strobe", GPIOD_OUT_HIGH);
+	if (IS_ERR(ts_nbus->strobe)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,strobe-gpio from dts\n");
+		return PTR_ERR(ts_nbus->strobe);
+	}
+
+	ts_nbus->ale = devm_gpiod_get(&pdev->dev, "ts,ale", GPIOD_OUT_HIGH);
+	if (IS_ERR(ts_nbus->ale)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,ale-gpio from dts\n");
+		return PTR_ERR(ts_nbus->ale);
+	}
+
+	ts_nbus->rdy = devm_gpiod_get(&pdev->dev, "ts,rdy", GPIOD_IN);
+	if (IS_ERR(ts_nbus->rdy)) {
+		dev_err(&pdev->dev, "failed to retrieve ts,rdy-gpio from dts\n");
+		return PTR_ERR(ts_nbus->rdy);
+	}
+
+	return 0;
+}
+
+/*
+ * the data gpios are used for reading and writing values, their directions
+ * should be adjusted accordingly.
+ */
+static void ts_nbus_set_direction(struct ts_nbus *ts_nbus, int direction)
+{
+	int i;
+
+	for (i = 0; i < 8; i++) {
+		if (direction == TS_NBUS_DIRECTION_IN)
+			gpiod_direction_input(ts_nbus->data->desc[i]);
+		else
+			/* when used as output the default state of the data
+			 * lines are set to high */
+			gpiod_direction_output(ts_nbus->data->desc[i], 1);
+	}
+}
+
+/*
+ * reset the bus in its initial state.
+ * The data, csn, strobe and ale lines must be zero'ed to let the FPGA knows a
+ * new transaction can be process.
+ */
+static void ts_nbus_reset_bus(struct ts_nbus *ts_nbus)
+{
+	int i;
+	int values[8];
+
+	for (i = 0; i < 8; i++)
+		values[i] = 0;
+
+	gpiod_set_array_value_cansleep(8, ts_nbus->data->desc, values);
+	gpiod_set_value_cansleep(ts_nbus->csn, 0);
+	gpiod_set_value_cansleep(ts_nbus->strobe, 0);
+	gpiod_set_value_cansleep(ts_nbus->ale, 0);
+}
+
+/*
+ * let the FPGA knows it can process.
+ */
+static void ts_nbus_start_transaction(struct ts_nbus *ts_nbus)
+{
+	gpiod_set_value_cansleep(ts_nbus->strobe, 1);
+}
+
+/*
+ * read a byte value from the data gpios.
+ * return 0 on success or negative errno on failure.
+ */
+static int ts_nbus_read_byte(struct ts_nbus *ts_nbus, u8 *val)
+{
+	struct gpio_descs *gpios = ts_nbus->data;
+	int ret, i;
+
+	*val = 0;
+	for (i = 0; i < 8; i++) {
+		ret = gpiod_get_value_cansleep(gpios->desc[i]);
+		if (ret < 0)
+			return ret;
+		if (ret)
+			*val |= BIT(i);
+	}
+
+	return 0;
+}
+
+/*
+ * set the data gpios accordingly to the byte value.
+ */
+static void ts_nbus_write_byte(struct ts_nbus *ts_nbus, u8 byte)
+{
+	struct gpio_descs *gpios = ts_nbus->data;
+	int i;
+	int values[8];
+
+	for (i = 0; i < 8; i++)
+		if (byte & BIT(i))
+			values[i] = 1;
+		else
+			values[i] = 0;
+
+	gpiod_set_array_value_cansleep(8, gpios->desc, values);
+}
+
+/*
+ * reading the bus consists of resetting the bus, then notifying the FPGA to
+ * send the data in the data gpios and return the read value.
+ * return 0 on success or negative errno on failure.
+ */
+static int ts_nbus_read_bus(struct ts_nbus *ts_nbus, u8 *val)
+{
+	ts_nbus_reset_bus(ts_nbus);
+	ts_nbus_start_transaction(ts_nbus);
+
+	return ts_nbus_read_byte(ts_nbus, val);
+}
+
+/*
+ * writing to the bus consists of resetting the bus, then define the type of
+ * command (address/value), write the data and notify the FPGA to retrieve the
+ * value in the data gpios.
+ */
+static void ts_nbus_write_bus(struct ts_nbus *ts_nbus, int cmd, u8 val)
+{
+	ts_nbus_reset_bus(ts_nbus);
+
+	if (cmd == TS_NBUS_WRITE_ADR)
+		gpiod_set_value_cansleep(ts_nbus->ale, 1);
+
+	ts_nbus_write_byte(ts_nbus, val);
+	ts_nbus_start_transaction(ts_nbus);
+}
+
+/*
+ * read the value in the FPGA register at the given address.
+ * return 0 on success or negative errno on failure.
+ */
+int ts_nbus_read(struct ts_nbus *ts_nbus, u8 adr, u16 *val)
+{
+	int ret, i;
+	u8 byte;
+
+	/* bus access must be atomic */
+	mutex_lock(&ts_nbus->lock);
+
+	/* set the bus in read mode */
+	gpiod_set_value_cansleep(ts_nbus->txrx, 0);
+
+	/* write address */
+	ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);
+
+	/* set the data gpios direction as input before reading */
+	ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_IN);
+
+	/* reading value MSB first */
+	do {
+		*val = 0;
+		byte = 0;
+		for (i = 1; i >= 0; i--) {
+			/* read a byte from the bus, leave on error */
+			ret = ts_nbus_read_bus(ts_nbus, &byte);
+			if (ret < 0)
+				goto err;
+
+			/* append the byte read to the final value */
+			*val |= byte << (i * 8);
+		}
+		gpiod_set_value_cansleep(ts_nbus->csn, 1);
+		ret = gpiod_get_value_cansleep(ts_nbus->rdy);
+	} while (ret);
+
+err:
+	/* restore the data gpios direction as output after reading */
+	ts_nbus_set_direction(ts_nbus, TS_NBUS_DIRECTION_OUT);
+
+	mutex_unlock(&ts_nbus->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(ts_nbus_read);
+
+/*
+ * write the desired value in the FPGA register at the given address.
+ */
+int ts_nbus_write(struct ts_nbus *ts_nbus, u8 adr, u16 val)
+{
+	int i;
+
+	/* bus access must be atomic */
+	mutex_lock(&ts_nbus->lock);
+
+	/* set the bus in write mode */
+	gpiod_set_value_cansleep(ts_nbus->txrx, 1);
+
+	/* write address */
+	ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_ADR, adr);
+
+	/* writing value MSB first */
+	for (i = 1; i >= 0; i--)
+		ts_nbus_write_bus(ts_nbus, TS_NBUS_WRITE_VAL, (u8)(val >> (i * 8)));
+
+	/* wait for completion */
+	gpiod_set_value_cansleep(ts_nbus->csn, 1);
+	while (gpiod_get_value_cansleep(ts_nbus->rdy) != 0) {
+		gpiod_set_value_cansleep(ts_nbus->csn, 0);
+		gpiod_set_value_cansleep(ts_nbus->csn, 1);
+	}
+
+	mutex_unlock(&ts_nbus->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(ts_nbus_write);
+
+static int ts_nbus_probe(struct platform_device *pdev)
+{
+	struct pwm_device *pwm;
+	struct pwm_args pargs;
+	struct device *dev = &pdev->dev;
+	struct ts_nbus *ts_nbus;
+	int ret;
+
+	ts_nbus = devm_kzalloc(dev, sizeof(*ts_nbus), GFP_KERNEL);
+	if (!ts_nbus)
+		return -ENOMEM;
+
+	mutex_init(&ts_nbus->lock);
+
+	ret = ts_nbus_init_pdata(pdev, ts_nbus);
+	if (ret < 0)
+		return ret;
+
+	pwm = devm_pwm_get(dev, NULL);
+	if (IS_ERR(pwm)) {
+		ret = PTR_ERR(pwm);
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "unable to request PWM\n");
+		return ret;
+	}
+
+	pwm_get_args(pwm, &pargs);
+	if (!pargs.period) {
+		dev_err(&pdev->dev, "invalid PWM period\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * FIXME: pwm_apply_args() should be removed when switching to
+	 * the atomic PWM API.
+	 */
+	pwm_apply_args(pwm);
+	ret = pwm_config(pwm, pargs.period, pargs.period);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * we can now start the FPGA and populate the peripherals.
+	 */
+	pwm_enable(pwm);
+	ts_nbus->pwm = pwm;
+
+	/*
+	 * let the child nodes retrieve this instance of the ts-nbus.
+	 */
+	dev_set_drvdata(dev, ts_nbus);
+
+	ret = of_platform_populate(dev->of_node, NULL, NULL, dev);
+	if (ret < 0)
+		return ret;
+
+	dev_info(dev, "initialized\n");
+
+	return 0;
+}
+
+static int ts_nbus_remove(struct platform_device *pdev)
+{
+	struct ts_nbus *ts_nbus = dev_get_drvdata(&pdev->dev);
+
+	/* shutdown the FPGA */
+	mutex_lock(&ts_nbus->lock);
+	pwm_disable(ts_nbus->pwm);
+	mutex_unlock(&ts_nbus->lock);
+
+	return 0;
+}
+
+static const struct of_device_id ts_nbus_of_match[] = {
+	{ .compatible = "technologic,ts-nbus", },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, ts_nbus_of_match);
+
+static struct platform_driver ts_nbus_driver = {
+	.probe		= ts_nbus_probe,
+	.remove		= ts_nbus_remove,
+	.driver		= {
+		.name	= "ts_nbus",
+		.of_match_table = ts_nbus_of_match,
+	},
+};
+
+module_platform_driver(ts_nbus_driver);
+
+MODULE_ALIAS("platform:ts_nbus");
+MODULE_AUTHOR("Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>");
+MODULE_DESCRIPTION("Technologic Systems NBUS");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/bus/uniphier-system-bus.c b/drivers/bus/uniphier-system-bus.c
new file mode 100644
index 000000000..f76be6bd6
--- /dev/null
+++ b/drivers/bus/uniphier-system-bus.c
@@ -0,0 +1,294 @@
+/*
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+/* System Bus Controller registers */
+#define UNIPHIER_SBC_BASE	0x100	/* base address of bank0 space */
+#define    UNIPHIER_SBC_BASE_BE		BIT(0)	/* bank_enable */
+#define UNIPHIER_SBC_CTRL0	0x200	/* timing parameter 0 of bank0 */
+#define UNIPHIER_SBC_CTRL1	0x204	/* timing parameter 1 of bank0 */
+#define UNIPHIER_SBC_CTRL2	0x208	/* timing parameter 2 of bank0 */
+#define UNIPHIER_SBC_CTRL3	0x20c	/* timing parameter 3 of bank0 */
+#define UNIPHIER_SBC_CTRL4	0x300	/* timing parameter 4 of bank0 */
+
+#define UNIPHIER_SBC_STRIDE	0x10	/* register stride to next bank */
+#define UNIPHIER_SBC_NR_BANKS	8	/* number of banks (chip select) */
+#define UNIPHIER_SBC_BASE_DUMMY	0xffffffff	/* data to squash bank 0, 1 */
+
+struct uniphier_system_bus_bank {
+	u32 base;
+	u32 end;
+};
+
+struct uniphier_system_bus_priv {
+	struct device *dev;
+	void __iomem *membase;
+	struct uniphier_system_bus_bank bank[UNIPHIER_SBC_NR_BANKS];
+};
+
+static int uniphier_system_bus_add_bank(struct uniphier_system_bus_priv *priv,
+					int bank, u32 addr, u64 paddr, u32 size)
+{
+	u64 end, mask;
+
+	dev_dbg(priv->dev,
+		"range found: bank = %d, addr = %08x, paddr = %08llx, size = %08x\n",
+		bank, addr, paddr, size);
+
+	if (bank >= ARRAY_SIZE(priv->bank)) {
+		dev_err(priv->dev, "unsupported bank number %d\n", bank);
+		return -EINVAL;
+	}
+
+	if (priv->bank[bank].base || priv->bank[bank].end) {
+		dev_err(priv->dev,
+			"range for bank %d has already been specified\n", bank);
+		return -EINVAL;
+	}
+
+	if (paddr > U32_MAX) {
+		dev_err(priv->dev, "base address %llx is too high\n", paddr);
+		return -EINVAL;
+	}
+
+	end = paddr + size;
+
+	if (addr > paddr) {
+		dev_err(priv->dev,
+			"base %08x cannot be mapped to %08llx of parent\n",
+			addr, paddr);
+		return -EINVAL;
+	}
+	paddr -= addr;
+
+	paddr = round_down(paddr, 0x00020000);
+	end = round_up(end, 0x00020000);
+
+	if (end > U32_MAX) {
+		dev_err(priv->dev, "end address %08llx is too high\n", end);
+		return -EINVAL;
+	}
+	mask = paddr ^ (end - 1);
+	mask = roundup_pow_of_two(mask);
+
+	paddr = round_down(paddr, mask);
+	end = round_up(end, mask);
+
+	priv->bank[bank].base = paddr;
+	priv->bank[bank].end = end;
+
+	dev_dbg(priv->dev, "range added: bank = %d, addr = %08x, end = %08x\n",
+		bank, priv->bank[bank].base, priv->bank[bank].end);
+
+	return 0;
+}
+
+static int uniphier_system_bus_check_overlap(
+				const struct uniphier_system_bus_priv *priv)
+{
+	int i, j;
+
+	for (i = 0; i < ARRAY_SIZE(priv->bank); i++) {
+		for (j = i + 1; j < ARRAY_SIZE(priv->bank); j++) {
+			if (priv->bank[i].end > priv->bank[j].base &&
+			    priv->bank[i].base < priv->bank[j].end) {
+				dev_err(priv->dev,
+					"region overlap between bank%d and bank%d\n",
+					i, j);
+				return -EINVAL;
+			}
+		}
+	}
+
+	return 0;
+}
+
+static void uniphier_system_bus_check_boot_swap(
+					struct uniphier_system_bus_priv *priv)
+{
+	void __iomem *base_reg = priv->membase + UNIPHIER_SBC_BASE;
+	int is_swapped;
+
+	is_swapped = !(readl(base_reg) & UNIPHIER_SBC_BASE_BE);
+
+	dev_dbg(priv->dev, "Boot Swap: %s\n", is_swapped ? "on" : "off");
+
+	/*
+	 * If BOOT_SWAP was asserted on power-on-reset, the CS0 and CS1 are
+	 * swapped.  In this case, bank0 and bank1 should be swapped as well.
+	 */
+	if (is_swapped)
+		swap(priv->bank[0], priv->bank[1]);
+}
+
+static void uniphier_system_bus_set_reg(
+				const struct uniphier_system_bus_priv *priv)
+{
+	void __iomem *base_reg = priv->membase + UNIPHIER_SBC_BASE;
+	u32 base, end, mask, val;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(priv->bank); i++) {
+		base = priv->bank[i].base;
+		end = priv->bank[i].end;
+
+		if (base == end) {
+			/*
+			 * If SBC_BASE0 or SBC_BASE1 is set to zero, the access
+			 * to anywhere in the system bus space is routed to
+			 * bank 0 (if boot swap if off) or bank 1 (if boot swap
+			 * if on).  It means that CPUs cannot get access to
+			 * bank 2 or later.  In other words, bank 0/1 cannot
+			 * be disabled even if its bank_enable bits is cleared.
+			 * This seems odd, but it is how this hardware goes.
+			 * As a workaround, dummy data (0xffffffff) should be
+			 * set when the bank 0/1 is unused.  As for bank 2 and
+			 * later, they can be simply disable by clearing the
+			 * bank_enable bit.
+			 */
+			if (i < 2)
+				val = UNIPHIER_SBC_BASE_DUMMY;
+			else
+				val = 0;
+		} else {
+			mask = base ^ (end - 1);
+
+			val = base & 0xfffe0000;
+			val |= (~mask >> 16) & 0xfffe;
+			val |= UNIPHIER_SBC_BASE_BE;
+		}
+		dev_dbg(priv->dev, "SBC_BASE[%d] = 0x%08x\n", i, val);
+
+		writel(val, base_reg + UNIPHIER_SBC_STRIDE * i);
+	}
+}
+
+static int uniphier_system_bus_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct uniphier_system_bus_priv *priv;
+	struct resource *regs;
+	const __be32 *ranges;
+	u32 cells, addr, size;
+	u64 paddr;
+	int pna, bank, rlen, rone, ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->membase = devm_ioremap_resource(dev, regs);
+	if (IS_ERR(priv->membase))
+		return PTR_ERR(priv->membase);
+
+	priv->dev = dev;
+
+	pna = of_n_addr_cells(dev->of_node);
+
+	ret = of_property_read_u32(dev->of_node, "#address-cells", &cells);
+	if (ret) {
+		dev_err(dev, "failed to get #address-cells\n");
+		return ret;
+	}
+	if (cells != 2) {
+		dev_err(dev, "#address-cells must be 2\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_u32(dev->of_node, "#size-cells", &cells);
+	if (ret) {
+		dev_err(dev, "failed to get #size-cells\n");
+		return ret;
+	}
+	if (cells != 1) {
+		dev_err(dev, "#size-cells must be 1\n");
+		return -EINVAL;
+	}
+
+	ranges = of_get_property(dev->of_node, "ranges", &rlen);
+	if (!ranges) {
+		dev_err(dev, "failed to get ranges property\n");
+		return -ENOENT;
+	}
+
+	rlen /= sizeof(*ranges);
+	rone = pna + 2;
+
+	for (; rlen >= rone; rlen -= rone) {
+		bank = be32_to_cpup(ranges++);
+		addr = be32_to_cpup(ranges++);
+		paddr = of_translate_address(dev->of_node, ranges);
+		if (paddr == OF_BAD_ADDR)
+			return -EINVAL;
+		ranges += pna;
+		size = be32_to_cpup(ranges++);
+
+		ret = uniphier_system_bus_add_bank(priv, bank, addr,
+						   paddr, size);
+		if (ret)
+			return ret;
+	}
+
+	ret = uniphier_system_bus_check_overlap(priv);
+	if (ret)
+		return ret;
+
+	uniphier_system_bus_check_boot_swap(priv);
+
+	uniphier_system_bus_set_reg(priv);
+
+	platform_set_drvdata(pdev, priv);
+
+	/* Now, the bus is configured.  Populate platform_devices below it */
+	return of_platform_default_populate(dev->of_node, NULL, dev);
+}
+
+static int __maybe_unused uniphier_system_bus_resume(struct device *dev)
+{
+	uniphier_system_bus_set_reg(dev_get_drvdata(dev));
+
+	return 0;
+}
+
+static const struct dev_pm_ops uniphier_system_bus_pm_ops = {
+	SET_SYSTEM_SLEEP_PM_OPS(NULL, uniphier_system_bus_resume)
+};
+
+static const struct of_device_id uniphier_system_bus_match[] = {
+	{ .compatible = "socionext,uniphier-system-bus" },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, uniphier_system_bus_match);
+
+static struct platform_driver uniphier_system_bus_driver = {
+	.probe		= uniphier_system_bus_probe,
+	.driver = {
+		.name	= "uniphier-system-bus",
+		.of_match_table = uniphier_system_bus_match,
+		.pm = &uniphier_system_bus_pm_ops,
+	},
+};
+module_platform_driver(uniphier_system_bus_driver);
+
+MODULE_AUTHOR("Masahiro Yamada <yamada.masahiro@socionext.com>");
+MODULE_DESCRIPTION("UniPhier System Bus driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/bus/vexpress-config.c b/drivers/bus/vexpress-config.c
new file mode 100644
index 000000000..493e7b9fc
--- /dev/null
+++ b/drivers/bus/vexpress-config.c
@@ -0,0 +1,210 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2014 ARM Limited
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/vexpress.h>
+
+
+struct vexpress_config_bridge {
+	struct vexpress_config_bridge_ops *ops;
+	void *context;
+};
+
+
+static DEFINE_MUTEX(vexpress_config_mutex);
+static struct class *vexpress_config_class;
+static u32 vexpress_config_site_master = VEXPRESS_SITE_MASTER;
+
+
+void vexpress_config_set_master(u32 site)
+{
+	vexpress_config_site_master = site;
+}
+
+u32 vexpress_config_get_master(void)
+{
+	return vexpress_config_site_master;
+}
+
+void vexpress_config_lock(void *arg)
+{
+	mutex_lock(&vexpress_config_mutex);
+}
+
+void vexpress_config_unlock(void *arg)
+{
+	mutex_unlock(&vexpress_config_mutex);
+}
+
+
+static void vexpress_config_find_prop(struct device_node *node,
+		const char *name, u32 *val)
+{
+	/* Default value */
+	*val = 0;
+
+	of_node_get(node);
+	while (node) {
+		if (of_property_read_u32(node, name, val) == 0) {
+			of_node_put(node);
+			return;
+		}
+		node = of_get_next_parent(node);
+	}
+}
+
+int vexpress_config_get_topo(struct device_node *node, u32 *site,
+		u32 *position, u32 *dcc)
+{
+	vexpress_config_find_prop(node, "arm,vexpress,site", site);
+	if (*site == VEXPRESS_SITE_MASTER)
+		*site = vexpress_config_site_master;
+	if (WARN_ON(vexpress_config_site_master == VEXPRESS_SITE_MASTER))
+		return -EINVAL;
+	vexpress_config_find_prop(node, "arm,vexpress,position", position);
+	vexpress_config_find_prop(node, "arm,vexpress,dcc", dcc);
+
+	return 0;
+}
+
+
+static void vexpress_config_devres_release(struct device *dev, void *res)
+{
+	struct vexpress_config_bridge *bridge = dev_get_drvdata(dev->parent);
+	struct regmap *regmap = res;
+
+	bridge->ops->regmap_exit(regmap, bridge->context);
+}
+
+struct regmap *devm_regmap_init_vexpress_config(struct device *dev)
+{
+	struct vexpress_config_bridge *bridge;
+	struct regmap *regmap;
+	struct regmap **res;
+
+	if (WARN_ON(dev->parent->class != vexpress_config_class))
+		return ERR_PTR(-ENODEV);
+
+	bridge = dev_get_drvdata(dev->parent);
+	if (WARN_ON(!bridge))
+		return ERR_PTR(-EINVAL);
+
+	res = devres_alloc(vexpress_config_devres_release, sizeof(*res),
+			GFP_KERNEL);
+	if (!res)
+		return ERR_PTR(-ENOMEM);
+
+	regmap = (bridge->ops->regmap_init)(dev, bridge->context);
+	if (IS_ERR(regmap)) {
+		devres_free(res);
+		return regmap;
+	}
+
+	*res = regmap;
+	devres_add(dev, res);
+
+	return regmap;
+}
+EXPORT_SYMBOL_GPL(devm_regmap_init_vexpress_config);
+
+struct device *vexpress_config_bridge_register(struct device *parent,
+		struct vexpress_config_bridge_ops *ops, void *context)
+{
+	struct device *dev;
+	struct vexpress_config_bridge *bridge;
+
+	if (!vexpress_config_class) {
+		vexpress_config_class = class_create(THIS_MODULE,
+				"vexpress-config");
+		if (IS_ERR(vexpress_config_class))
+			return (void *)vexpress_config_class;
+	}
+
+	dev = device_create(vexpress_config_class, parent, 0,
+			NULL, "%s.bridge", dev_name(parent));
+
+	if (IS_ERR(dev))
+		return dev;
+
+	bridge = devm_kmalloc(dev, sizeof(*bridge), GFP_KERNEL);
+	if (!bridge) {
+		put_device(dev);
+		device_unregister(dev);
+		return ERR_PTR(-ENOMEM);
+	}
+	bridge->ops = ops;
+	bridge->context = context;
+
+	dev_set_drvdata(dev, bridge);
+
+	dev_dbg(parent, "Registered bridge '%s', parent node %p\n",
+			dev_name(dev), parent->of_node);
+
+	return dev;
+}
+
+
+static int vexpress_config_node_match(struct device *dev, const void *data)
+{
+	const struct device_node *node = data;
+
+	dev_dbg(dev, "Parent node %p, looking for %p\n",
+			dev->parent->of_node, node);
+
+	return dev->parent->of_node == node;
+}
+
+static int vexpress_config_populate(struct device_node *node)
+{
+	struct device_node *bridge;
+	struct device *parent;
+	int ret;
+
+	bridge = of_parse_phandle(node, "arm,vexpress,config-bridge", 0);
+	if (!bridge)
+		return -EINVAL;
+
+	parent = class_find_device(vexpress_config_class, NULL, bridge,
+			vexpress_config_node_match);
+	of_node_put(bridge);
+	if (WARN_ON(!parent))
+		return -ENODEV;
+
+	ret = of_platform_populate(node, NULL, NULL, parent);
+
+	put_device(parent);
+
+	return ret;
+}
+
+static int __init vexpress_config_init(void)
+{
+	int err = 0;
+	struct device_node *node;
+
+	/* Need the config devices early, before the "normal" devices... */
+	for_each_compatible_node(node, NULL, "arm,vexpress,config-bus") {
+		err = vexpress_config_populate(node);
+		if (err) {
+			of_node_put(node);
+			break;
+		}
+	}
+
+	return err;
+}
+postcore_initcall(vexpress_config_init);
+