Adding upstream version 4.19.249.upstream/4.19.249

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

27 files changed, 10428 insertions, 0 deletions

diff --git a/drivers/remoteproc/Kconfig b/drivers/remoteproc/Kconfig
new file mode 100644
index 000000000..052d4dd34
--- /dev/null
+++ b/drivers/remoteproc/Kconfig
@@ -0,0 +1,186 @@
+menu "Remoteproc drivers"
+
+config REMOTEPROC
+	tristate "Support for Remote Processor subsystem"
+	depends on HAS_DMA
+	select CRC32
+	select FW_LOADER
+	select VIRTIO
+	select WANT_DEV_COREDUMP
+	help
+	  Support for remote processors (such as DSP coprocessors). These
+	  are mainly used on embedded systems.
+
+if REMOTEPROC
+
+config IMX_REMOTEPROC
+	tristate "IMX6/7 remoteproc support"
+	depends on SOC_IMX6SX || SOC_IMX7D
+	help
+	  Say y here to support iMX's remote processors (Cortex M4
+	  on iMX7D) via the remote processor framework.
+
+	  It's safe to say N here.
+
+config OMAP_REMOTEPROC
+	tristate "OMAP remoteproc support"
+	depends on ARCH_OMAP4 || SOC_OMAP5
+	depends on OMAP_IOMMU
+	select MAILBOX
+	select OMAP2PLUS_MBOX
+	help
+	  Say y here to support OMAP's remote processors (dual M3
+	  and DSP on OMAP4) via the remote processor framework.
+
+	  Currently only supported on OMAP4.
+
+	  Usually you want to say Y here, in order to enable multimedia
+	  use-cases to run on your platform (multimedia codecs are
+	  offloaded to remote DSP processors using this framework).
+
+	  It's safe to say N here if you're not interested in multimedia
+	  offloading or just want a bare minimum kernel.
+
+config WKUP_M3_RPROC
+	tristate "AMx3xx Wakeup M3 remoteproc support"
+	depends on SOC_AM33XX || SOC_AM43XX
+	help
+	  Say y here to support Wakeup M3 remote processor on TI AM33xx
+	  and AM43xx family of SoCs.
+
+	  Required for Suspend-to-RAM on AM33xx and AM43xx SoCs. Also needed
+	  for deep CPUIdle states on AM33xx SoCs. Allows for loading of the
+	  firmware onto these remote processors.
+	  If unsure say N.
+
+config DA8XX_REMOTEPROC
+	tristate "DA8xx/OMAP-L13x remoteproc support"
+	depends on ARCH_DAVINCI_DA8XX
+	depends on DMA_CMA
+	help
+	  Say y here to support DA8xx/OMAP-L13x remote processors via the
+	  remote processor framework.
+
+	  You want to say y here in order to enable AMP
+	  use-cases to run on your platform (multimedia codecs are
+	  offloaded to remote DSP processors using this framework).
+
+	  This module controls the name of the firmware file that gets
+	  loaded on the DSP.  This file must reside in the /lib/firmware
+	  directory.  It can be specified via the module parameter
+	  da8xx_fw_name=<filename>, and if not specified will default to
+	  "rproc-dsp-fw".
+
+	  It's safe to say n here if you're not interested in multimedia
+	  offloading.
+
+config KEYSTONE_REMOTEPROC
+	tristate "Keystone Remoteproc support"
+	depends on ARCH_KEYSTONE
+	help
+	  Say Y here here to support Keystone remote processors (DSP)
+	  via the remote processor framework.
+
+	  It's safe to say N here if you're not interested in the Keystone
+	  DSPs or just want to use a bare minimum kernel.
+
+config QCOM_ADSP_PIL
+	tristate "Qualcomm ADSP Peripheral Image Loader"
+	depends on OF && ARCH_QCOM
+	depends on QCOM_SMEM
+	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
+	depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+	depends on QCOM_SYSMON || QCOM_SYSMON=n
+	select MFD_SYSCON
+	select QCOM_MDT_LOADER
+	select QCOM_Q6V5_COMMON
+	select QCOM_RPROC_COMMON
+	select QCOM_SCM
+	help
+	  Say y here to support the TrustZone based Peripherial Image Loader
+	  for the Qualcomm ADSP remote processors.
+
+config QCOM_RPROC_COMMON
+	tristate
+
+config QCOM_Q6V5_COMMON
+	tristate
+	depends on ARCH_QCOM
+	depends on QCOM_SMEM
+
+config QCOM_Q6V5_PIL
+	tristate "Qualcomm Hexagon V5 Peripherial Image Loader"
+	depends on OF && ARCH_QCOM
+	depends on QCOM_SMEM
+	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
+	depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+	depends on QCOM_SYSMON || QCOM_SYSMON=n
+	select MFD_SYSCON
+	select QCOM_Q6V5_COMMON
+	select QCOM_RPROC_COMMON
+	select QCOM_SCM
+	help
+	  Say y here to support the Qualcomm Peripherial Image Loader for the
+	  Hexagon V5 based remote processors.
+
+config QCOM_Q6V5_WCSS
+	tristate "Qualcomm Hexagon based WCSS Peripheral Image Loader"
+	depends on OF && ARCH_QCOM
+	depends on QCOM_SMEM
+	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
+	depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+	depends on QCOM_SYSMON || QCOM_SYSMON=n
+	select MFD_SYSCON
+	select QCOM_MDT_LOADER
+	select QCOM_Q6V5_COMMON
+	select QCOM_RPROC_COMMON
+	select QCOM_SCM
+	help
+	  Say y here to support the Qualcomm Peripheral Image Loader for the
+	  Hexagon V5 based WCSS remote processors.
+
+config QCOM_SYSMON
+	tristate "Qualcomm sysmon driver"
+	depends on RPMSG
+	depends on ARCH_QCOM
+	depends on NET
+	select QCOM_QMI_HELPERS
+	help
+	  The sysmon driver implements a sysmon QMI client and a handler for
+	  the sys_mon SMD and GLINK channel, which are used for graceful
+	  shutdown, retrieving failure information and propagating information
+	  about other subsystems being shut down.
+
+	  Say y here if your system runs firmware on any other subsystems, e.g.
+	  modem or DSP.
+
+config QCOM_WCNSS_PIL
+	tristate "Qualcomm WCNSS Peripheral Image Loader"
+	depends on OF && ARCH_QCOM
+	depends on RPMSG_QCOM_SMD || (COMPILE_TEST && RPMSG_QCOM_SMD=n)
+	depends on RPMSG_QCOM_GLINK_SMEM || RPMSG_QCOM_GLINK_SMEM=n
+	depends on QCOM_SMEM
+	depends on QCOM_SYSMON || QCOM_SYSMON=n
+	select QCOM_MDT_LOADER
+	select QCOM_RPROC_COMMON
+	select QCOM_SCM
+	help
+	  Say y here to support the Peripheral Image Loader for the Qualcomm
+	  Wireless Connectivity Subsystem.
+
+config ST_REMOTEPROC
+	tristate "ST remoteproc support"
+	depends on ARCH_STI
+	select MAILBOX
+	select STI_MBOX
+	help
+	  Say y here to support ST's adjunct processors via the remote
+	  processor framework.
+	  This can be either built-in or a loadable module.
+
+config ST_SLIM_REMOTEPROC
+	tristate
+
+endif # REMOTEPROC
+
+endmenu
diff --git a/drivers/remoteproc/Makefile b/drivers/remoteproc/Makefile
new file mode 100644
index 000000000..03332fa7e
--- /dev/null
+++ b/drivers/remoteproc/Makefile
@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Generic framework for controlling remote processors
+#
+
+obj-$(CONFIG_REMOTEPROC)		+= remoteproc.o
+remoteproc-y				:= remoteproc_core.o
+remoteproc-y				+= remoteproc_debugfs.o
+remoteproc-y				+= remoteproc_sysfs.o
+remoteproc-y				+= remoteproc_virtio.o
+remoteproc-y				+= remoteproc_elf_loader.o
+obj-$(CONFIG_IMX_REMOTEPROC)		+= imx_rproc.o
+obj-$(CONFIG_OMAP_REMOTEPROC)		+= omap_remoteproc.o
+obj-$(CONFIG_WKUP_M3_RPROC)		+= wkup_m3_rproc.o
+obj-$(CONFIG_DA8XX_REMOTEPROC)		+= da8xx_remoteproc.o
+obj-$(CONFIG_KEYSTONE_REMOTEPROC)	+= keystone_remoteproc.o
+obj-$(CONFIG_QCOM_ADSP_PIL)		+= qcom_adsp_pil.o
+obj-$(CONFIG_QCOM_RPROC_COMMON)		+= qcom_common.o
+obj-$(CONFIG_QCOM_Q6V5_COMMON)		+= qcom_q6v5.o
+obj-$(CONFIG_QCOM_Q6V5_PIL)		+= qcom_q6v5_pil.o
+obj-$(CONFIG_QCOM_Q6V5_WCSS)		+= qcom_q6v5_wcss.o
+obj-$(CONFIG_QCOM_SYSMON)		+= qcom_sysmon.o
+obj-$(CONFIG_QCOM_WCNSS_PIL)		+= qcom_wcnss_pil.o
+qcom_wcnss_pil-y			+= qcom_wcnss.o
+qcom_wcnss_pil-y			+= qcom_wcnss_iris.o
+obj-$(CONFIG_ST_REMOTEPROC)		+= st_remoteproc.o
+obj-$(CONFIG_ST_SLIM_REMOTEPROC)	+= st_slim_rproc.o
diff --git a/drivers/remoteproc/da8xx_remoteproc.c b/drivers/remoteproc/da8xx_remoteproc.c
new file mode 100644
index 000000000..d20033457
--- /dev/null
+++ b/drivers/remoteproc/da8xx_remoteproc.c
@@ -0,0 +1,404 @@
+/*
+ * Remote processor machine-specific module for DA8XX
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * 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/bitops.h>
+#include <linux/clk.h>
+#include <linux/reset.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+
+#include "remoteproc_internal.h"
+
+static char *da8xx_fw_name;
+module_param(da8xx_fw_name, charp, 0444);
+MODULE_PARM_DESC(da8xx_fw_name,
+		 "Name of DSP firmware file in /lib/firmware (if not specified defaults to 'rproc-dsp-fw')");
+
+/*
+ * OMAP-L138 Technical References:
+ * http://www.ti.com/product/omap-l138
+ */
+#define SYSCFG_CHIPSIG0 BIT(0)
+#define SYSCFG_CHIPSIG1 BIT(1)
+#define SYSCFG_CHIPSIG2 BIT(2)
+#define SYSCFG_CHIPSIG3 BIT(3)
+#define SYSCFG_CHIPSIG4 BIT(4)
+
+#define DA8XX_RPROC_LOCAL_ADDRESS_MASK	(SZ_16M - 1)
+
+/**
+ * struct da8xx_rproc_mem - internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @dev_addr: Device address of the memory region from DSP view
+ * @size: Size of the memory region
+ */
+struct da8xx_rproc_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t bus_addr;
+	u32 dev_addr;
+	size_t size;
+};
+
+/**
+ * struct da8xx_rproc - da8xx remote processor instance state
+ * @rproc: rproc handle
+ * @mem: internal memory regions data
+ * @num_mems: number of internal memory regions
+ * @dsp_clk: placeholder for platform's DSP clk
+ * @ack_fxn: chip-specific ack function for ack'ing irq
+ * @irq_data: ack_fxn function parameter
+ * @chipsig: virt ptr to DSP interrupt registers (CHIPSIG & CHIPSIG_CLR)
+ * @bootreg: virt ptr to DSP boot address register (HOST1CFG)
+ * @irq: irq # used by this instance
+ */
+struct da8xx_rproc {
+	struct rproc *rproc;
+	struct da8xx_rproc_mem *mem;
+	int num_mems;
+	struct clk *dsp_clk;
+	struct reset_control *dsp_reset;
+	void (*ack_fxn)(struct irq_data *data);
+	struct irq_data *irq_data;
+	void __iomem *chipsig;
+	void __iomem *bootreg;
+	int irq;
+};
+
+/**
+ * handle_event() - inbound virtqueue message workqueue function
+ *
+ * This function is registered as a kernel thread and is scheduled by the
+ * kernel handler.
+ */
+static irqreturn_t handle_event(int irq, void *p)
+{
+	struct rproc *rproc = (struct rproc *)p;
+
+	/* Process incoming buffers on all our vrings */
+	rproc_vq_interrupt(rproc, 0);
+	rproc_vq_interrupt(rproc, 1);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * da8xx_rproc_callback() - inbound virtqueue message handler
+ *
+ * This handler is invoked directly by the kernel whenever the remote
+ * core (DSP) has modified the state of a virtqueue.  There is no
+ * "payload" message indicating the virtqueue index as is the case with
+ * mailbox-based implementations on OMAP4.  As such, this handler "polls"
+ * each known virtqueue index for every invocation.
+ */
+static irqreturn_t da8xx_rproc_callback(int irq, void *p)
+{
+	struct rproc *rproc = (struct rproc *)p;
+	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+	u32 chipsig;
+
+	chipsig = readl(drproc->chipsig);
+	if (chipsig & SYSCFG_CHIPSIG0) {
+		/* Clear interrupt level source */
+		writel(SYSCFG_CHIPSIG0, drproc->chipsig + 4);
+
+		/*
+		 * ACK intr to AINTC.
+		 *
+		 * It has already been ack'ed by the kernel before calling
+		 * this function, but since the ARM<->DSP interrupts in the
+		 * CHIPSIG register are "level" instead of "pulse" variety,
+		 * we need to ack it after taking down the level else we'll
+		 * be called again immediately after returning.
+		 */
+		drproc->ack_fxn(drproc->irq_data);
+
+		return IRQ_WAKE_THREAD;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int da8xx_rproc_start(struct rproc *rproc)
+{
+	struct device *dev = rproc->dev.parent;
+	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+	struct clk *dsp_clk = drproc->dsp_clk;
+	struct reset_control *dsp_reset = drproc->dsp_reset;
+	int ret;
+
+	/* hw requires the start (boot) address be on 1KB boundary */
+	if (rproc->bootaddr & 0x3ff) {
+		dev_err(dev, "invalid boot address: must be aligned to 1KB\n");
+
+		return -EINVAL;
+	}
+
+	writel(rproc->bootaddr, drproc->bootreg);
+
+	ret = clk_prepare_enable(dsp_clk);
+	if (ret) {
+		dev_err(dev, "clk_prepare_enable() failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = reset_control_deassert(dsp_reset);
+	if (ret) {
+		dev_err(dev, "reset_control_deassert() failed: %d\n", ret);
+		clk_disable_unprepare(dsp_clk);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int da8xx_rproc_stop(struct rproc *rproc)
+{
+	struct da8xx_rproc *drproc = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	int ret;
+
+	ret = reset_control_assert(drproc->dsp_reset);
+	if (ret) {
+		dev_err(dev, "reset_control_assert() failed: %d\n", ret);
+		return ret;
+	}
+
+	clk_disable_unprepare(drproc->dsp_clk);
+
+	return 0;
+}
+
+/* kick a virtqueue */
+static void da8xx_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+
+	/* Interrupt remote proc */
+	writel(SYSCFG_CHIPSIG2, drproc->chipsig);
+}
+
+static const struct rproc_ops da8xx_rproc_ops = {
+	.start = da8xx_rproc_start,
+	.stop = da8xx_rproc_stop,
+	.kick = da8xx_rproc_kick,
+};
+
+static int da8xx_rproc_get_internal_memories(struct platform_device *pdev,
+					     struct da8xx_rproc *drproc)
+{
+	static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
+	int num_mems = ARRAY_SIZE(mem_names);
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	int i;
+
+	drproc->mem = devm_kcalloc(dev, num_mems, sizeof(*drproc->mem),
+				   GFP_KERNEL);
+	if (!drproc->mem)
+		return -ENOMEM;
+
+	for (i = 0; i < num_mems; i++) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   mem_names[i]);
+		drproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(drproc->mem[i].cpu_addr)) {
+			dev_err(dev, "failed to parse and map %s memory\n",
+				mem_names[i]);
+			return PTR_ERR(drproc->mem[i].cpu_addr);
+		}
+		drproc->mem[i].bus_addr = res->start;
+		drproc->mem[i].dev_addr =
+				res->start & DA8XX_RPROC_LOCAL_ADDRESS_MASK;
+		drproc->mem[i].size = resource_size(res);
+
+		dev_dbg(dev, "memory %8s: bus addr %pa size 0x%zx va %p da 0x%x\n",
+			mem_names[i], &drproc->mem[i].bus_addr,
+			drproc->mem[i].size, drproc->mem[i].cpu_addr,
+			drproc->mem[i].dev_addr);
+	}
+	drproc->num_mems = num_mems;
+
+	return 0;
+}
+
+static int da8xx_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct da8xx_rproc *drproc;
+	struct rproc *rproc;
+	struct irq_data *irq_data;
+	struct resource *bootreg_res;
+	struct resource *chipsig_res;
+	struct clk *dsp_clk;
+	struct reset_control *dsp_reset;
+	void __iomem *chipsig;
+	void __iomem *bootreg;
+	int irq;
+	int ret;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0) {
+		dev_err(dev, "platform_get_irq(pdev, 0) error: %d\n", irq);
+		return irq;
+	}
+
+	irq_data = irq_get_irq_data(irq);
+	if (!irq_data) {
+		dev_err(dev, "irq_get_irq_data(%d): NULL\n", irq);
+		return -EINVAL;
+	}
+
+	bootreg_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   "host1cfg");
+	bootreg = devm_ioremap_resource(dev, bootreg_res);
+	if (IS_ERR(bootreg))
+		return PTR_ERR(bootreg);
+
+	chipsig_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   "chipsig");
+	chipsig = devm_ioremap_resource(dev, chipsig_res);
+	if (IS_ERR(chipsig))
+		return PTR_ERR(chipsig);
+
+	dsp_clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(dsp_clk)) {
+		dev_err(dev, "clk_get error: %ld\n", PTR_ERR(dsp_clk));
+
+		return PTR_ERR(dsp_clk);
+	}
+
+	dsp_reset = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(dsp_reset)) {
+		if (PTR_ERR(dsp_reset) != -EPROBE_DEFER)
+			dev_err(dev, "unable to get reset control: %ld\n",
+				PTR_ERR(dsp_reset));
+
+		return PTR_ERR(dsp_reset);
+	}
+
+	if (dev->of_node) {
+		ret = of_reserved_mem_device_init(dev);
+		if (ret) {
+			dev_err(dev, "device does not have specific CMA pool: %d\n",
+				ret);
+			return ret;
+		}
+	}
+
+	rproc = rproc_alloc(dev, "dsp", &da8xx_rproc_ops, da8xx_fw_name,
+		sizeof(*drproc));
+	if (!rproc) {
+		ret = -ENOMEM;
+		goto free_mem;
+	}
+
+	/* error recovery is not supported at present */
+	rproc->recovery_disabled = true;
+
+	drproc = rproc->priv;
+	drproc->rproc = rproc;
+	drproc->dsp_clk = dsp_clk;
+	drproc->dsp_reset = dsp_reset;
+	rproc->has_iommu = false;
+
+	ret = da8xx_rproc_get_internal_memories(pdev, drproc);
+	if (ret)
+		goto free_rproc;
+
+	platform_set_drvdata(pdev, rproc);
+
+	/* everything the ISR needs is now setup, so hook it up */
+	ret = devm_request_threaded_irq(dev, irq, da8xx_rproc_callback,
+					handle_event, 0, "da8xx-remoteproc",
+					rproc);
+	if (ret) {
+		dev_err(dev, "devm_request_threaded_irq error: %d\n", ret);
+		goto free_rproc;
+	}
+
+	/*
+	 * rproc_add() can end up enabling the DSP's clk with the DSP
+	 * *not* in reset, but da8xx_rproc_start() needs the DSP to be
+	 * held in reset at the time it is called.
+	 */
+	ret = reset_control_assert(dsp_reset);
+	if (ret)
+		goto free_rproc;
+
+	drproc->chipsig = chipsig;
+	drproc->bootreg = bootreg;
+	drproc->ack_fxn = irq_data->chip->irq_ack;
+	drproc->irq_data = irq_data;
+	drproc->irq = irq;
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err(dev, "rproc_add failed: %d\n", ret);
+		goto free_rproc;
+	}
+
+	return 0;
+
+free_rproc:
+	rproc_free(rproc);
+free_mem:
+	if (dev->of_node)
+		of_reserved_mem_device_release(dev);
+	return ret;
+}
+
+static int da8xx_rproc_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+	struct da8xx_rproc *drproc = (struct da8xx_rproc *)rproc->priv;
+	struct device *dev = &pdev->dev;
+
+	/*
+	 * The devm subsystem might end up releasing things before
+	 * freeing the irq, thus allowing an interrupt to sneak in while
+	 * the device is being removed.  This should prevent that.
+	 */
+	disable_irq(drproc->irq);
+
+	rproc_del(rproc);
+	rproc_free(rproc);
+	if (dev->of_node)
+		of_reserved_mem_device_release(dev);
+
+	return 0;
+}
+
+static const struct of_device_id davinci_rproc_of_match[] __maybe_unused = {
+	{ .compatible = "ti,da850-dsp", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, davinci_rproc_of_match);
+
+static struct platform_driver da8xx_rproc_driver = {
+	.probe = da8xx_rproc_probe,
+	.remove = da8xx_rproc_remove,
+	.driver = {
+		.name = "davinci-rproc",
+		.of_match_table = of_match_ptr(davinci_rproc_of_match),
+	},
+};
+
+module_platform_driver(da8xx_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("DA8XX Remote Processor control driver");
diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
new file mode 100644
index 000000000..54c07fd3f
--- /dev/null
+++ b/drivers/remoteproc/imx_rproc.c
@@ -0,0 +1,424 @@
+/*
+ * Copyright (c) 2017 Pengutronix, Oleksij Rempel <kernel@pengutronix.de>
+ *
+ * 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/clk.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/remoteproc.h>
+
+#define IMX7D_SRC_SCR			0x0C
+#define IMX7D_ENABLE_M4			BIT(3)
+#define IMX7D_SW_M4P_RST		BIT(2)
+#define IMX7D_SW_M4C_RST		BIT(1)
+#define IMX7D_SW_M4C_NON_SCLR_RST	BIT(0)
+
+#define IMX7D_M4_RST_MASK		(IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \
+					 | IMX7D_SW_M4C_RST \
+					 | IMX7D_SW_M4C_NON_SCLR_RST)
+
+#define IMX7D_M4_START			(IMX7D_ENABLE_M4 | IMX7D_SW_M4P_RST \
+					 | IMX7D_SW_M4C_RST)
+#define IMX7D_M4_STOP			IMX7D_SW_M4C_NON_SCLR_RST
+
+/* Address: 0x020D8000 */
+#define IMX6SX_SRC_SCR			0x00
+#define IMX6SX_ENABLE_M4		BIT(22)
+#define IMX6SX_SW_M4P_RST		BIT(12)
+#define IMX6SX_SW_M4C_NON_SCLR_RST	BIT(4)
+#define IMX6SX_SW_M4C_RST		BIT(3)
+
+#define IMX6SX_M4_START			(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
+					 | IMX6SX_SW_M4C_RST)
+#define IMX6SX_M4_STOP			IMX6SX_SW_M4C_NON_SCLR_RST
+#define IMX6SX_M4_RST_MASK		(IMX6SX_ENABLE_M4 | IMX6SX_SW_M4P_RST \
+					 | IMX6SX_SW_M4C_NON_SCLR_RST \
+					 | IMX6SX_SW_M4C_RST)
+
+#define IMX7D_RPROC_MEM_MAX		8
+
+/**
+ * struct imx_rproc_mem - slim internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @sys_addr: Bus address used to access the memory region
+ * @size: Size of the memory region
+ */
+struct imx_rproc_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t sys_addr;
+	size_t size;
+};
+
+/* att flags */
+/* M4 own area. Can be mapped at probe */
+#define ATT_OWN		BIT(1)
+
+/* address translation table */
+struct imx_rproc_att {
+	u32 da;	/* device address (From Cortex M4 view)*/
+	u32 sa;	/* system bus address */
+	u32 size; /* size of reg range */
+	int flags;
+};
+
+struct imx_rproc_dcfg {
+	u32				src_reg;
+	u32				src_mask;
+	u32				src_start;
+	u32				src_stop;
+	const struct imx_rproc_att	*att;
+	size_t				att_size;
+};
+
+struct imx_rproc {
+	struct device			*dev;
+	struct regmap			*regmap;
+	struct rproc			*rproc;
+	const struct imx_rproc_dcfg	*dcfg;
+	struct imx_rproc_mem		mem[IMX7D_RPROC_MEM_MAX];
+	struct clk			*clk;
+};
+
+static const struct imx_rproc_att imx_rproc_att_imx7d[] = {
+	/* dev addr , sys addr  , size	    , flags */
+	/* OCRAM_S (M4 Boot code) - alias */
+	{ 0x00000000, 0x00180000, 0x00008000, 0 },
+	/* OCRAM_S (Code) */
+	{ 0x00180000, 0x00180000, 0x00008000, ATT_OWN },
+	/* OCRAM (Code) - alias */
+	{ 0x00900000, 0x00900000, 0x00020000, 0 },
+	/* OCRAM_EPDC (Code) - alias */
+	{ 0x00920000, 0x00920000, 0x00020000, 0 },
+	/* OCRAM_PXP (Code) - alias */
+	{ 0x00940000, 0x00940000, 0x00008000, 0 },
+	/* TCML (Code) */
+	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
+	/* DDR (Code) - alias, first part of DDR (Data) */
+	{ 0x10000000, 0x80000000, 0x0FFF0000, 0 },
+
+	/* TCMU (Data) */
+	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
+	/* OCRAM (Data) */
+	{ 0x20200000, 0x00900000, 0x00020000, 0 },
+	/* OCRAM_EPDC (Data) */
+	{ 0x20220000, 0x00920000, 0x00020000, 0 },
+	/* OCRAM_PXP (Data) */
+	{ 0x20240000, 0x00940000, 0x00008000, 0 },
+	/* DDR (Data) */
+	{ 0x80000000, 0x80000000, 0x60000000, 0 },
+};
+
+static const struct imx_rproc_att imx_rproc_att_imx6sx[] = {
+	/* dev addr , sys addr  , size	    , flags */
+	/* TCML (M4 Boot Code) - alias */
+	{ 0x00000000, 0x007F8000, 0x00008000, 0 },
+	/* OCRAM_S (Code) */
+	{ 0x00180000, 0x008F8000, 0x00004000, 0 },
+	/* OCRAM_S (Code) - alias */
+	{ 0x00180000, 0x008FC000, 0x00004000, 0 },
+	/* TCML (Code) */
+	{ 0x1FFF8000, 0x007F8000, 0x00008000, ATT_OWN },
+	/* DDR (Code) - alias, first part of DDR (Data) */
+	{ 0x10000000, 0x80000000, 0x0FFF8000, 0 },
+
+	/* TCMU (Data) */
+	{ 0x20000000, 0x00800000, 0x00008000, ATT_OWN },
+	/* OCRAM_S (Data) - alias? */
+	{ 0x208F8000, 0x008F8000, 0x00004000, 0 },
+	/* DDR (Data) */
+	{ 0x80000000, 0x80000000, 0x60000000, 0 },
+};
+
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx7d = {
+	.src_reg	= IMX7D_SRC_SCR,
+	.src_mask	= IMX7D_M4_RST_MASK,
+	.src_start	= IMX7D_M4_START,
+	.src_stop	= IMX7D_M4_STOP,
+	.att		= imx_rproc_att_imx7d,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx7d),
+};
+
+static const struct imx_rproc_dcfg imx_rproc_cfg_imx6sx = {
+	.src_reg	= IMX6SX_SRC_SCR,
+	.src_mask	= IMX6SX_M4_RST_MASK,
+	.src_start	= IMX6SX_M4_START,
+	.src_stop	= IMX6SX_M4_STOP,
+	.att		= imx_rproc_att_imx6sx,
+	.att_size	= ARRAY_SIZE(imx_rproc_att_imx6sx),
+};
+
+static int imx_rproc_start(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	struct device *dev = priv->dev;
+	int ret;
+
+	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
+				 dcfg->src_mask, dcfg->src_start);
+	if (ret)
+		dev_err(dev, "Filed to enable M4!\n");
+
+	return ret;
+}
+
+static int imx_rproc_stop(struct rproc *rproc)
+{
+	struct imx_rproc *priv = rproc->priv;
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	struct device *dev = priv->dev;
+	int ret;
+
+	ret = regmap_update_bits(priv->regmap, dcfg->src_reg,
+				 dcfg->src_mask, dcfg->src_stop);
+	if (ret)
+		dev_err(dev, "Filed to stop M4!\n");
+
+	return ret;
+}
+
+static int imx_rproc_da_to_sys(struct imx_rproc *priv, u64 da,
+			       int len, u64 *sys)
+{
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	int i;
+
+	/* parse address translation table */
+	for (i = 0; i < dcfg->att_size; i++) {
+		const struct imx_rproc_att *att = &dcfg->att[i];
+
+		if (da >= att->da && da + len < att->da + att->size) {
+			unsigned int offset = da - att->da;
+
+			*sys = att->sa + offset;
+			return 0;
+		}
+	}
+
+	dev_warn(priv->dev, "Translation filed: da = 0x%llx len = 0x%x\n",
+		 da, len);
+	return -ENOENT;
+}
+
+static void *imx_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct imx_rproc *priv = rproc->priv;
+	void *va = NULL;
+	u64 sys;
+	int i;
+
+	if (len <= 0)
+		return NULL;
+
+	/*
+	 * On device side we have many aliases, so we need to convert device
+	 * address (M4) to system bus address first.
+	 */
+	if (imx_rproc_da_to_sys(priv, da, len, &sys))
+		return NULL;
+
+	for (i = 0; i < IMX7D_RPROC_MEM_MAX; i++) {
+		if (sys >= priv->mem[i].sys_addr && sys + len <
+		    priv->mem[i].sys_addr +  priv->mem[i].size) {
+			unsigned int offset = sys - priv->mem[i].sys_addr;
+			/* __force to make sparse happy with type conversion */
+			va = (__force void *)(priv->mem[i].cpu_addr + offset);
+			break;
+		}
+	}
+
+	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%p\n", da, len, va);
+
+	return va;
+}
+
+static const struct rproc_ops imx_rproc_ops = {
+	.start		= imx_rproc_start,
+	.stop		= imx_rproc_stop,
+	.da_to_va       = imx_rproc_da_to_va,
+};
+
+static int imx_rproc_addr_init(struct imx_rproc *priv,
+			       struct platform_device *pdev)
+{
+	const struct imx_rproc_dcfg *dcfg = priv->dcfg;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	int a, b = 0, err, nph;
+
+	/* remap required addresses */
+	for (a = 0; a < dcfg->att_size; a++) {
+		const struct imx_rproc_att *att = &dcfg->att[a];
+
+		if (!(att->flags & ATT_OWN))
+			continue;
+
+		if (b >= IMX7D_RPROC_MEM_MAX)
+			break;
+
+		priv->mem[b].cpu_addr = devm_ioremap(&pdev->dev,
+						     att->sa, att->size);
+		if (!priv->mem[b].cpu_addr) {
+			dev_err(dev, "devm_ioremap_resource failed\n");
+			return -ENOMEM;
+		}
+		priv->mem[b].sys_addr = att->sa;
+		priv->mem[b].size = att->size;
+		b++;
+	}
+
+	/* memory-region is optional property */
+	nph = of_count_phandle_with_args(np, "memory-region", NULL);
+	if (nph <= 0)
+		return 0;
+
+	/* remap optional addresses */
+	for (a = 0; a < nph; a++) {
+		struct device_node *node;
+		struct resource res;
+
+		node = of_parse_phandle(np, "memory-region", a);
+		err = of_address_to_resource(node, 0, &res);
+		if (err) {
+			dev_err(dev, "unable to resolve memory region\n");
+			return err;
+		}
+
+		if (b >= IMX7D_RPROC_MEM_MAX)
+			break;
+
+		priv->mem[b].cpu_addr = devm_ioremap_resource(&pdev->dev, &res);
+		if (IS_ERR(priv->mem[b].cpu_addr)) {
+			dev_err(dev, "devm_ioremap_resource failed\n");
+			err = PTR_ERR(priv->mem[b].cpu_addr);
+			return err;
+		}
+		priv->mem[b].sys_addr = res.start;
+		priv->mem[b].size = resource_size(&res);
+		b++;
+	}
+
+	return 0;
+}
+
+static int imx_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct imx_rproc *priv;
+	struct rproc *rproc;
+	struct regmap_config config = { .name = "imx-rproc" };
+	const struct imx_rproc_dcfg *dcfg;
+	struct regmap *regmap;
+	int ret;
+
+	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+	if (IS_ERR(regmap)) {
+		dev_err(dev, "failed to find syscon\n");
+		return PTR_ERR(regmap);
+	}
+	regmap_attach_dev(dev, regmap, &config);
+
+	/* set some other name then imx */
+	rproc = rproc_alloc(dev, "imx-rproc", &imx_rproc_ops,
+			    NULL, sizeof(*priv));
+	if (!rproc)
+		return -ENOMEM;
+
+	dcfg = of_device_get_match_data(dev);
+	if (!dcfg) {
+		ret = -EINVAL;
+		goto err_put_rproc;
+	}
+
+	priv = rproc->priv;
+	priv->rproc = rproc;
+	priv->regmap = regmap;
+	priv->dcfg = dcfg;
+	priv->dev = dev;
+
+	dev_set_drvdata(dev, rproc);
+
+	ret = imx_rproc_addr_init(priv, pdev);
+	if (ret) {
+		dev_err(dev, "filed on imx_rproc_addr_init\n");
+		goto err_put_rproc;
+	}
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		dev_err(dev, "Failed to get clock\n");
+		ret = PTR_ERR(priv->clk);
+		goto err_put_rproc;
+	}
+
+	/*
+	 * clk for M4 block including memory. Should be
+	 * enabled before .start for FW transfer.
+	 */
+	ret = clk_prepare_enable(priv->clk);
+	if (ret) {
+		dev_err(&rproc->dev, "Failed to enable clock\n");
+		goto err_put_rproc;
+	}
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err(dev, "rproc_add failed\n");
+		goto err_put_clk;
+	}
+
+	return 0;
+
+err_put_clk:
+	clk_disable_unprepare(priv->clk);
+err_put_rproc:
+	rproc_free(rproc);
+
+	return ret;
+}
+
+static int imx_rproc_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+	struct imx_rproc *priv = rproc->priv;
+
+	clk_disable_unprepare(priv->clk);
+	rproc_del(rproc);
+	rproc_free(rproc);
+
+	return 0;
+}
+
+static const struct of_device_id imx_rproc_of_match[] = {
+	{ .compatible = "fsl,imx7d-cm4", .data = &imx_rproc_cfg_imx7d },
+	{ .compatible = "fsl,imx6sx-cm4", .data = &imx_rproc_cfg_imx6sx },
+	{},
+};
+MODULE_DEVICE_TABLE(of, imx_rproc_of_match);
+
+static struct platform_driver imx_rproc_driver = {
+	.probe = imx_rproc_probe,
+	.remove = imx_rproc_remove,
+	.driver = {
+		.name = "imx-rproc",
+		.of_match_table = imx_rproc_of_match,
+	},
+};
+
+module_platform_driver(imx_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("IMX6SX/7D remote processor control driver");
+MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>");
diff --git a/drivers/remoteproc/keystone_remoteproc.c b/drivers/remoteproc/keystone_remoteproc.c
new file mode 100644
index 000000000..aaac31134
--- /dev/null
+++ b/drivers/remoteproc/keystone_remoteproc.c
@@ -0,0 +1,526 @@
+/*
+ * TI Keystone DSP remoteproc driver
+ *
+ * Copyright (C) 2015-2017 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
+ * 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/module.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/workqueue.h>
+#include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/of_gpio.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+
+#include "remoteproc_internal.h"
+
+#define KEYSTONE_RPROC_LOCAL_ADDRESS_MASK	(SZ_16M - 1)
+
+/**
+ * struct keystone_rproc_mem - internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @dev_addr: Device address of the memory region from DSP view
+ * @size: Size of the memory region
+ */
+struct keystone_rproc_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t bus_addr;
+	u32 dev_addr;
+	size_t size;
+};
+
+/**
+ * struct keystone_rproc - keystone remote processor driver structure
+ * @dev: cached device pointer
+ * @rproc: remoteproc device handle
+ * @mem: internal memory regions data
+ * @num_mems: number of internal memory regions
+ * @dev_ctrl: device control regmap handle
+ * @reset: reset control handle
+ * @boot_offset: boot register offset in @dev_ctrl regmap
+ * @irq_ring: irq entry for vring
+ * @irq_fault: irq entry for exception
+ * @kick_gpio: gpio used for virtio kicks
+ * @workqueue: workqueue for processing virtio interrupts
+ */
+struct keystone_rproc {
+	struct device *dev;
+	struct rproc *rproc;
+	struct keystone_rproc_mem *mem;
+	int num_mems;
+	struct regmap *dev_ctrl;
+	struct reset_control *reset;
+	u32 boot_offset;
+	int irq_ring;
+	int irq_fault;
+	int kick_gpio;
+	struct work_struct workqueue;
+};
+
+/* Put the DSP processor into reset */
+static void keystone_rproc_dsp_reset(struct keystone_rproc *ksproc)
+{
+	reset_control_assert(ksproc->reset);
+}
+
+/* Configure the boot address and boot the DSP processor */
+static int keystone_rproc_dsp_boot(struct keystone_rproc *ksproc, u32 boot_addr)
+{
+	int ret;
+
+	if (boot_addr & (SZ_1K - 1)) {
+		dev_err(ksproc->dev, "invalid boot address 0x%x, must be aligned on a 1KB boundary\n",
+			boot_addr);
+		return -EINVAL;
+	}
+
+	ret = regmap_write(ksproc->dev_ctrl, ksproc->boot_offset, boot_addr);
+	if (ret) {
+		dev_err(ksproc->dev, "regmap_write of boot address failed, status = %d\n",
+			ret);
+		return ret;
+	}
+
+	reset_control_deassert(ksproc->reset);
+
+	return 0;
+}
+
+/*
+ * Process the remoteproc exceptions
+ *
+ * The exception reporting on Keystone DSP remote processors is very simple
+ * compared to the equivalent processors on the OMAP family, it is notified
+ * through a software-designed specific interrupt source in the IPC interrupt
+ * generation register.
+ *
+ * This function just invokes the rproc_report_crash to report the exception
+ * to the remoteproc driver core, to trigger a recovery.
+ */
+static irqreturn_t keystone_rproc_exception_interrupt(int irq, void *dev_id)
+{
+	struct keystone_rproc *ksproc = dev_id;
+
+	rproc_report_crash(ksproc->rproc, RPROC_FATAL_ERROR);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Main virtqueue message workqueue function
+ *
+ * This function is executed upon scheduling of the keystone remoteproc
+ * driver's workqueue. The workqueue is scheduled by the vring ISR handler.
+ *
+ * There is no payload message indicating the virtqueue index as is the
+ * case with mailbox-based implementations on OMAP family. As such, this
+ * handler processes both the Tx and Rx virtqueue indices on every invocation.
+ * The rproc_vq_interrupt function can detect if there are new unprocessed
+ * messages or not (returns IRQ_NONE vs IRQ_HANDLED), but there is no need
+ * to check for these return values. The index 0 triggering will process all
+ * pending Rx buffers, and the index 1 triggering will process all newly
+ * available Tx buffers and will wakeup any potentially blocked senders.
+ *
+ * NOTE:
+ * 1. A payload could be added by using some of the source bits in the
+ *    IPC interrupt generation registers, but this would need additional
+ *    changes to the overall IPC stack, and currently there are no benefits
+ *    of adapting that approach.
+ * 2. The current logic is based on an inherent design assumption of supporting
+ *    only 2 vrings, but this can be changed if needed.
+ */
+static void handle_event(struct work_struct *work)
+{
+	struct keystone_rproc *ksproc =
+		container_of(work, struct keystone_rproc, workqueue);
+
+	rproc_vq_interrupt(ksproc->rproc, 0);
+	rproc_vq_interrupt(ksproc->rproc, 1);
+}
+
+/*
+ * Interrupt handler for processing vring kicks from remote processor
+ */
+static irqreturn_t keystone_rproc_vring_interrupt(int irq, void *dev_id)
+{
+	struct keystone_rproc *ksproc = dev_id;
+
+	schedule_work(&ksproc->workqueue);
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Power up the DSP remote processor.
+ *
+ * This function will be invoked only after the firmware for this rproc
+ * was loaded, parsed successfully, and all of its resource requirements
+ * were met.
+ */
+static int keystone_rproc_start(struct rproc *rproc)
+{
+	struct keystone_rproc *ksproc = rproc->priv;
+	int ret;
+
+	INIT_WORK(&ksproc->workqueue, handle_event);
+
+	ret = request_irq(ksproc->irq_ring, keystone_rproc_vring_interrupt, 0,
+			  dev_name(ksproc->dev), ksproc);
+	if (ret) {
+		dev_err(ksproc->dev, "failed to enable vring interrupt, ret = %d\n",
+			ret);
+		goto out;
+	}
+
+	ret = request_irq(ksproc->irq_fault, keystone_rproc_exception_interrupt,
+			  0, dev_name(ksproc->dev), ksproc);
+	if (ret) {
+		dev_err(ksproc->dev, "failed to enable exception interrupt, ret = %d\n",
+			ret);
+		goto free_vring_irq;
+	}
+
+	ret = keystone_rproc_dsp_boot(ksproc, rproc->bootaddr);
+	if (ret)
+		goto free_exc_irq;
+
+	return 0;
+
+free_exc_irq:
+	free_irq(ksproc->irq_fault, ksproc);
+free_vring_irq:
+	free_irq(ksproc->irq_ring, ksproc);
+	flush_work(&ksproc->workqueue);
+out:
+	return ret;
+}
+
+/*
+ * Stop the DSP remote processor.
+ *
+ * This function puts the DSP processor into reset, and finishes processing
+ * of any pending messages.
+ */
+static int keystone_rproc_stop(struct rproc *rproc)
+{
+	struct keystone_rproc *ksproc = rproc->priv;
+
+	keystone_rproc_dsp_reset(ksproc);
+	free_irq(ksproc->irq_fault, ksproc);
+	free_irq(ksproc->irq_ring, ksproc);
+	flush_work(&ksproc->workqueue);
+
+	return 0;
+}
+
+/*
+ * Kick the remote processor to notify about pending unprocessed messages.
+ * The vqid usage is not used and is inconsequential, as the kick is performed
+ * through a simulated GPIO (a bit in an IPC interrupt-triggering register),
+ * the remote processor is expected to process both its Tx and Rx virtqueues.
+ */
+static void keystone_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct keystone_rproc *ksproc = rproc->priv;
+
+	if (WARN_ON(ksproc->kick_gpio < 0))
+		return;
+
+	gpio_set_value(ksproc->kick_gpio, 1);
+}
+
+/*
+ * Custom function to translate a DSP device address (internal RAMs only) to a
+ * kernel virtual address.  The DSPs can access their RAMs at either an internal
+ * address visible only from a DSP, or at the SoC-level bus address. Both these
+ * addresses need to be looked through for translation. The translated addresses
+ * can be used either by the remoteproc core for loading (when using kernel
+ * remoteproc loader), or by any rpmsg bus drivers.
+ */
+static void *keystone_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct keystone_rproc *ksproc = rproc->priv;
+	void __iomem *va = NULL;
+	phys_addr_t bus_addr;
+	u32 dev_addr, offset;
+	size_t size;
+	int i;
+
+	if (len <= 0)
+		return NULL;
+
+	for (i = 0; i < ksproc->num_mems; i++) {
+		bus_addr = ksproc->mem[i].bus_addr;
+		dev_addr = ksproc->mem[i].dev_addr;
+		size = ksproc->mem[i].size;
+
+		if (da < KEYSTONE_RPROC_LOCAL_ADDRESS_MASK) {
+			/* handle DSP-view addresses */
+			if ((da >= dev_addr) &&
+			    ((da + len) <= (dev_addr + size))) {
+				offset = da - dev_addr;
+				va = ksproc->mem[i].cpu_addr + offset;
+				break;
+			}
+		} else {
+			/* handle SoC-view addresses */
+			if ((da >= bus_addr) &&
+			    (da + len) <= (bus_addr + size)) {
+				offset = da - bus_addr;
+				va = ksproc->mem[i].cpu_addr + offset;
+				break;
+			}
+		}
+	}
+
+	return (__force void *)va;
+}
+
+static const struct rproc_ops keystone_rproc_ops = {
+	.start		= keystone_rproc_start,
+	.stop		= keystone_rproc_stop,
+	.kick		= keystone_rproc_kick,
+	.da_to_va	= keystone_rproc_da_to_va,
+};
+
+static int keystone_rproc_of_get_memories(struct platform_device *pdev,
+					  struct keystone_rproc *ksproc)
+{
+	static const char * const mem_names[] = {"l2sram", "l1pram", "l1dram"};
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	int num_mems = 0;
+	int i;
+
+	num_mems = ARRAY_SIZE(mem_names);
+	ksproc->mem = devm_kcalloc(ksproc->dev, num_mems,
+				   sizeof(*ksproc->mem), GFP_KERNEL);
+	if (!ksproc->mem)
+		return -ENOMEM;
+
+	for (i = 0; i < num_mems; i++) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   mem_names[i]);
+		ksproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(ksproc->mem[i].cpu_addr)) {
+			dev_err(dev, "failed to parse and map %s memory\n",
+				mem_names[i]);
+			return PTR_ERR(ksproc->mem[i].cpu_addr);
+		}
+		ksproc->mem[i].bus_addr = res->start;
+		ksproc->mem[i].dev_addr =
+				res->start & KEYSTONE_RPROC_LOCAL_ADDRESS_MASK;
+		ksproc->mem[i].size = resource_size(res);
+
+		/* zero out memories to start in a pristine state */
+		memset((__force void *)ksproc->mem[i].cpu_addr, 0,
+		       ksproc->mem[i].size);
+	}
+	ksproc->num_mems = num_mems;
+
+	return 0;
+}
+
+static int keystone_rproc_of_get_dev_syscon(struct platform_device *pdev,
+					    struct keystone_rproc *ksproc)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct device *dev = &pdev->dev;
+	int ret;
+
+	if (!of_property_read_bool(np, "ti,syscon-dev")) {
+		dev_err(dev, "ti,syscon-dev property is absent\n");
+		return -EINVAL;
+	}
+
+	ksproc->dev_ctrl =
+		syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");
+	if (IS_ERR(ksproc->dev_ctrl)) {
+		ret = PTR_ERR(ksproc->dev_ctrl);
+		return ret;
+	}
+
+	if (of_property_read_u32_index(np, "ti,syscon-dev", 1,
+				       &ksproc->boot_offset)) {
+		dev_err(dev, "couldn't read the boot register offset\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int keystone_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct keystone_rproc *ksproc;
+	struct rproc *rproc;
+	int dsp_id;
+	char *fw_name = NULL;
+	char *template = "keystone-dsp%d-fw";
+	int name_len = 0;
+	int ret = 0;
+
+	if (!np) {
+		dev_err(dev, "only DT-based devices are supported\n");
+		return -ENODEV;
+	}
+
+	dsp_id = of_alias_get_id(np, "rproc");
+	if (dsp_id < 0) {
+		dev_warn(dev, "device does not have an alias id\n");
+		return dsp_id;
+	}
+
+	/* construct a custom default fw name - subject to change in future */
+	name_len = strlen(template); /* assuming a single digit alias */
+	fw_name = devm_kzalloc(dev, name_len, GFP_KERNEL);
+	if (!fw_name)
+		return -ENOMEM;
+	snprintf(fw_name, name_len, template, dsp_id);
+
+	rproc = rproc_alloc(dev, dev_name(dev), &keystone_rproc_ops, fw_name,
+			    sizeof(*ksproc));
+	if (!rproc)
+		return -ENOMEM;
+
+	rproc->has_iommu = false;
+	ksproc = rproc->priv;
+	ksproc->rproc = rproc;
+	ksproc->dev = dev;
+
+	ret = keystone_rproc_of_get_dev_syscon(pdev, ksproc);
+	if (ret)
+		goto free_rproc;
+
+	ksproc->reset = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(ksproc->reset)) {
+		ret = PTR_ERR(ksproc->reset);
+		goto free_rproc;
+	}
+
+	/* enable clock for accessing DSP internal memories */
+	pm_runtime_enable(dev);
+	ret = pm_runtime_get_sync(dev);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable clock, status = %d\n", ret);
+		pm_runtime_put_noidle(dev);
+		goto disable_rpm;
+	}
+
+	ret = keystone_rproc_of_get_memories(pdev, ksproc);
+	if (ret)
+		goto disable_clk;
+
+	ksproc->irq_ring = platform_get_irq_byname(pdev, "vring");
+	if (ksproc->irq_ring < 0) {
+		ret = ksproc->irq_ring;
+		dev_err(dev, "failed to get vring interrupt, status = %d\n",
+			ret);
+		goto disable_clk;
+	}
+
+	ksproc->irq_fault = platform_get_irq_byname(pdev, "exception");
+	if (ksproc->irq_fault < 0) {
+		ret = ksproc->irq_fault;
+		dev_err(dev, "failed to get exception interrupt, status = %d\n",
+			ret);
+		goto disable_clk;
+	}
+
+	ksproc->kick_gpio = of_get_named_gpio_flags(np, "kick-gpios", 0, NULL);
+	if (ksproc->kick_gpio < 0) {
+		ret = ksproc->kick_gpio;
+		dev_err(dev, "failed to get gpio for virtio kicks, status = %d\n",
+			ret);
+		goto disable_clk;
+	}
+
+	if (of_reserved_mem_device_init(dev))
+		dev_warn(dev, "device does not have specific CMA pool\n");
+
+	/* ensure the DSP is in reset before loading firmware */
+	ret = reset_control_status(ksproc->reset);
+	if (ret < 0) {
+		dev_err(dev, "failed to get reset status, status = %d\n", ret);
+		goto release_mem;
+	} else if (ret == 0) {
+		WARN(1, "device is not in reset\n");
+		keystone_rproc_dsp_reset(ksproc);
+	}
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err(dev, "failed to add register device with remoteproc core, status = %d\n",
+			ret);
+		goto release_mem;
+	}
+
+	platform_set_drvdata(pdev, ksproc);
+
+	return 0;
+
+release_mem:
+	of_reserved_mem_device_release(dev);
+disable_clk:
+	pm_runtime_put_sync(dev);
+disable_rpm:
+	pm_runtime_disable(dev);
+free_rproc:
+	rproc_free(rproc);
+	return ret;
+}
+
+static int keystone_rproc_remove(struct platform_device *pdev)
+{
+	struct keystone_rproc *ksproc = platform_get_drvdata(pdev);
+
+	rproc_del(ksproc->rproc);
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+	rproc_free(ksproc->rproc);
+	of_reserved_mem_device_release(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id keystone_rproc_of_match[] = {
+	{ .compatible = "ti,k2hk-dsp", },
+	{ .compatible = "ti,k2l-dsp", },
+	{ .compatible = "ti,k2e-dsp", },
+	{ .compatible = "ti,k2g-dsp", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, keystone_rproc_of_match);
+
+static struct platform_driver keystone_rproc_driver = {
+	.probe	= keystone_rproc_probe,
+	.remove	= keystone_rproc_remove,
+	.driver	= {
+		.name = "keystone-rproc",
+		.of_match_table = keystone_rproc_of_match,
+	},
+};
+
+module_platform_driver(keystone_rproc_driver);
+
+MODULE_AUTHOR("Suman Anna <s-anna@ti.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI Keystone DSP Remoteproc driver");
diff --git a/drivers/remoteproc/omap_remoteproc.c b/drivers/remoteproc/omap_remoteproc.c
new file mode 100644
index 000000000..a96ce9083
--- /dev/null
+++ b/drivers/remoteproc/omap_remoteproc.c
@@ -0,0 +1,243 @@
+/*
+ * OMAP Remote Processor driver
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ * Fernando Guzman Lugo <fernando.lugo@ti.com>
+ * Mark Grosen <mgrosen@ti.com>
+ * Suman Anna <s-anna@ti.com>
+ * Hari Kanigeri <h-kanigeri2@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 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/kernel.h>
+#include <linux/module.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/remoteproc.h>
+#include <linux/mailbox_client.h>
+#include <linux/omap-mailbox.h>
+
+#include <linux/platform_data/remoteproc-omap.h>
+
+#include "omap_remoteproc.h"
+#include "remoteproc_internal.h"
+
+/**
+ * struct omap_rproc - omap remote processor state
+ * @mbox: mailbox channel handle
+ * @client: mailbox client to request the mailbox channel
+ * @rproc: rproc handle
+ */
+struct omap_rproc {
+	struct mbox_chan *mbox;
+	struct mbox_client client;
+	struct rproc *rproc;
+};
+
+/**
+ * omap_rproc_mbox_callback() - inbound mailbox message handler
+ * @client: mailbox client pointer used for requesting the mailbox channel
+ * @data: mailbox payload
+ *
+ * This handler is invoked by omap's mailbox driver whenever a mailbox
+ * message is received. Usually, the mailbox payload simply contains
+ * the index of the virtqueue that is kicked by the remote processor,
+ * and we let remoteproc core handle it.
+ *
+ * In addition to virtqueue indices, we also have some out-of-band values
+ * that indicates different events. Those values are deliberately very
+ * big so they don't coincide with virtqueue indices.
+ */
+static void omap_rproc_mbox_callback(struct mbox_client *client, void *data)
+{
+	struct omap_rproc *oproc = container_of(client, struct omap_rproc,
+						client);
+	struct device *dev = oproc->rproc->dev.parent;
+	const char *name = oproc->rproc->name;
+	u32 msg = (u32)data;
+
+	dev_dbg(dev, "mbox msg: 0x%x\n", msg);
+
+	switch (msg) {
+	case RP_MBOX_CRASH:
+		/* just log this for now. later, we'll also do recovery */
+		dev_err(dev, "omap rproc %s crashed\n", name);
+		break;
+	case RP_MBOX_ECHO_REPLY:
+		dev_info(dev, "received echo reply from %s\n", name);
+		break;
+	default:
+		/* msg contains the index of the triggered vring */
+		if (rproc_vq_interrupt(oproc->rproc, msg) == IRQ_NONE)
+			dev_dbg(dev, "no message was found in vqid %d\n", msg);
+	}
+}
+
+/* kick a virtqueue */
+static void omap_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct omap_rproc *oproc = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	int ret;
+
+	/* send the index of the triggered virtqueue in the mailbox payload */
+	ret = mbox_send_message(oproc->mbox, (void *)vqid);
+	if (ret < 0)
+		dev_err(dev, "failed to send mailbox message, status = %d\n",
+			ret);
+}
+
+/*
+ * Power up the remote processor.
+ *
+ * This function will be invoked only after the firmware for this rproc
+ * was loaded, parsed successfully, and all of its resource requirements
+ * were met.
+ */
+static int omap_rproc_start(struct rproc *rproc)
+{
+	struct omap_rproc *oproc = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
+	int ret;
+	struct mbox_client *client = &oproc->client;
+
+	if (pdata->set_bootaddr)
+		pdata->set_bootaddr(rproc->bootaddr);
+
+	client->dev = dev;
+	client->tx_done = NULL;
+	client->rx_callback = omap_rproc_mbox_callback;
+	client->tx_block = false;
+	client->knows_txdone = false;
+
+	oproc->mbox = omap_mbox_request_channel(client, pdata->mbox_name);
+	if (IS_ERR(oproc->mbox)) {
+		ret = -EBUSY;
+		dev_err(dev, "mbox_request_channel failed: %ld\n",
+			PTR_ERR(oproc->mbox));
+		return ret;
+	}
+
+	/*
+	 * Ping the remote processor. this is only for sanity-sake;
+	 * there is no functional effect whatsoever.
+	 *
+	 * Note that the reply will _not_ arrive immediately: this message
+	 * will wait in the mailbox fifo until the remote processor is booted.
+	 */
+	ret = mbox_send_message(oproc->mbox, (void *)RP_MBOX_ECHO_REQUEST);
+	if (ret < 0) {
+		dev_err(dev, "mbox_send_message failed: %d\n", ret);
+		goto put_mbox;
+	}
+
+	ret = pdata->device_enable(pdev);
+	if (ret) {
+		dev_err(dev, "omap_device_enable failed: %d\n", ret);
+		goto put_mbox;
+	}
+
+	return 0;
+
+put_mbox:
+	mbox_free_channel(oproc->mbox);
+	return ret;
+}
+
+/* power off the remote processor */
+static int omap_rproc_stop(struct rproc *rproc)
+{
+	struct device *dev = rproc->dev.parent;
+	struct platform_device *pdev = to_platform_device(dev);
+	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
+	struct omap_rproc *oproc = rproc->priv;
+	int ret;
+
+	ret = pdata->device_shutdown(pdev);
+	if (ret)
+		return ret;
+
+	mbox_free_channel(oproc->mbox);
+
+	return 0;
+}
+
+static const struct rproc_ops omap_rproc_ops = {
+	.start		= omap_rproc_start,
+	.stop		= omap_rproc_stop,
+	.kick		= omap_rproc_kick,
+};
+
+static int omap_rproc_probe(struct platform_device *pdev)
+{
+	struct omap_rproc_pdata *pdata = pdev->dev.platform_data;
+	struct omap_rproc *oproc;
+	struct rproc *rproc;
+	int ret;
+
+	ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
+	if (ret) {
+		dev_err(&pdev->dev, "dma_set_coherent_mask: %d\n", ret);
+		return ret;
+	}
+
+	rproc = rproc_alloc(&pdev->dev, pdata->name, &omap_rproc_ops,
+			    pdata->firmware, sizeof(*oproc));
+	if (!rproc)
+		return -ENOMEM;
+
+	oproc = rproc->priv;
+	oproc->rproc = rproc;
+	/* All existing OMAP IPU and DSP processors have an MMU */
+	rproc->has_iommu = true;
+
+	platform_set_drvdata(pdev, rproc);
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_rproc;
+
+	return 0;
+
+free_rproc:
+	rproc_free(rproc);
+	return ret;
+}
+
+static int omap_rproc_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+
+	rproc_del(rproc);
+	rproc_free(rproc);
+
+	return 0;
+}
+
+static struct platform_driver omap_rproc_driver = {
+	.probe = omap_rproc_probe,
+	.remove = omap_rproc_remove,
+	.driver = {
+		.name = "omap-rproc",
+	},
+};
+
+module_platform_driver(omap_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("OMAP Remote Processor control driver");
diff --git a/drivers/remoteproc/omap_remoteproc.h b/drivers/remoteproc/omap_remoteproc.h
new file mode 100644
index 000000000..f6d2036d3
--- /dev/null
+++ b/drivers/remoteproc/omap_remoteproc.h
@@ -0,0 +1,69 @@
+/*
+ * Remote processor messaging
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in
+ *   the documentation and/or other materials provided with the
+ *   distribution.
+ * * Neither the name Texas Instruments nor the names of its
+ *   contributors may be used to endorse or promote products derived
+ *   from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _OMAP_RPMSG_H
+#define _OMAP_RPMSG_H
+
+/*
+ * enum - Predefined Mailbox Messages
+ *
+ * @RP_MBOX_READY: informs the M3's that we're up and running. this is
+ * part of the init sequence sent that the M3 expects to see immediately
+ * after it is booted.
+ *
+ * @RP_MBOX_PENDING_MSG: informs the receiver that there is an inbound
+ * message waiting in its own receive-side vring. please note that currently
+ * this message is optional: alternatively, one can explicitly send the index
+ * of the triggered virtqueue itself. the preferred approach will be decided
+ * as we progress and experiment with those two different approaches.
+ *
+ * @RP_MBOX_CRASH: this message is sent if BIOS crashes
+ *
+ * @RP_MBOX_ECHO_REQUEST: a mailbox-level "ping" message.
+ *
+ * @RP_MBOX_ECHO_REPLY: a mailbox-level reply to a "ping"
+ *
+ * @RP_MBOX_ABORT_REQUEST: a "please crash" request, used for testing the
+ * recovery mechanism (to some extent).
+ */
+enum omap_rp_mbox_messages {
+	RP_MBOX_READY		= 0xFFFFFF00,
+	RP_MBOX_PENDING_MSG	= 0xFFFFFF01,
+	RP_MBOX_CRASH		= 0xFFFFFF02,
+	RP_MBOX_ECHO_REQUEST	= 0xFFFFFF03,
+	RP_MBOX_ECHO_REPLY	= 0xFFFFFF04,
+	RP_MBOX_ABORT_REQUEST	= 0xFFFFFF05,
+};
+
+#endif /* _OMAP_RPMSG_H */
diff --git a/drivers/remoteproc/qcom_adsp_pil.c b/drivers/remoteproc/qcom_adsp_pil.c
new file mode 100644
index 000000000..d4339a6da
--- /dev/null
+++ b/drivers/remoteproc/qcom_adsp_pil.c
@@ -0,0 +1,374 @@
+/*
+ * Qualcomm ADSP/SLPI Peripheral Image Loader for MSM8974 and MSM8996
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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/clk.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/qcom_scm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
+#include "qcom_common.h"
+#include "qcom_q6v5.h"
+#include "remoteproc_internal.h"
+
+struct adsp_data {
+	int crash_reason_smem;
+	const char *firmware_name;
+	int pas_id;
+	bool has_aggre2_clk;
+
+	const char *ssr_name;
+	const char *sysmon_name;
+	int ssctl_id;
+};
+
+struct qcom_adsp {
+	struct device *dev;
+	struct rproc *rproc;
+
+	struct qcom_q6v5 q6v5;
+
+	struct clk *xo;
+	struct clk *aggre2_clk;
+
+	struct regulator *cx_supply;
+	struct regulator *px_supply;
+
+	int pas_id;
+	int crash_reason_smem;
+	bool has_aggre2_clk;
+
+	struct completion start_done;
+	struct completion stop_done;
+
+	phys_addr_t mem_phys;
+	phys_addr_t mem_reloc;
+	void *mem_region;
+	size_t mem_size;
+
+	struct qcom_rproc_glink glink_subdev;
+	struct qcom_rproc_subdev smd_subdev;
+	struct qcom_rproc_ssr ssr_subdev;
+	struct qcom_sysmon *sysmon;
+};
+
+static int adsp_load(struct rproc *rproc, const struct firmware *fw)
+{
+	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+
+	return qcom_mdt_load(adsp->dev, fw, rproc->firmware, adsp->pas_id,
+			     adsp->mem_region, adsp->mem_phys, adsp->mem_size,
+			     &adsp->mem_reloc);
+
+}
+
+static int adsp_start(struct rproc *rproc)
+{
+	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+	int ret;
+
+	qcom_q6v5_prepare(&adsp->q6v5);
+
+	ret = clk_prepare_enable(adsp->xo);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(adsp->aggre2_clk);
+	if (ret)
+		goto disable_xo_clk;
+
+	ret = regulator_enable(adsp->cx_supply);
+	if (ret)
+		goto disable_aggre2_clk;
+
+	ret = regulator_enable(adsp->px_supply);
+	if (ret)
+		goto disable_cx_supply;
+
+	ret = qcom_scm_pas_auth_and_reset(adsp->pas_id);
+	if (ret) {
+		dev_err(adsp->dev,
+			"failed to authenticate image and release reset\n");
+		goto disable_px_supply;
+	}
+
+	ret = qcom_q6v5_wait_for_start(&adsp->q6v5, msecs_to_jiffies(5000));
+	if (ret == -ETIMEDOUT) {
+		dev_err(adsp->dev, "start timed out\n");
+		qcom_scm_pas_shutdown(adsp->pas_id);
+		goto disable_px_supply;
+	}
+
+	return 0;
+
+disable_px_supply:
+	regulator_disable(adsp->px_supply);
+disable_cx_supply:
+	regulator_disable(adsp->cx_supply);
+disable_aggre2_clk:
+	clk_disable_unprepare(adsp->aggre2_clk);
+disable_xo_clk:
+	clk_disable_unprepare(adsp->xo);
+
+	return ret;
+}
+
+static void qcom_pas_handover(struct qcom_q6v5 *q6v5)
+{
+	struct qcom_adsp *adsp = container_of(q6v5, struct qcom_adsp, q6v5);
+
+	regulator_disable(adsp->px_supply);
+	regulator_disable(adsp->cx_supply);
+	clk_disable_unprepare(adsp->aggre2_clk);
+	clk_disable_unprepare(adsp->xo);
+}
+
+static int adsp_stop(struct rproc *rproc)
+{
+	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+	int handover;
+	int ret;
+
+	ret = qcom_q6v5_request_stop(&adsp->q6v5);
+	if (ret == -ETIMEDOUT)
+		dev_err(adsp->dev, "timed out on wait\n");
+
+	ret = qcom_scm_pas_shutdown(adsp->pas_id);
+	if (ret)
+		dev_err(adsp->dev, "failed to shutdown: %d\n", ret);
+
+	handover = qcom_q6v5_unprepare(&adsp->q6v5);
+	if (handover)
+		qcom_pas_handover(&adsp->q6v5);
+
+	return ret;
+}
+
+static void *adsp_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+	int offset;
+
+	offset = da - adsp->mem_reloc;
+	if (offset < 0 || offset + len > adsp->mem_size)
+		return NULL;
+
+	return adsp->mem_region + offset;
+}
+
+static const struct rproc_ops adsp_ops = {
+	.start = adsp_start,
+	.stop = adsp_stop,
+	.da_to_va = adsp_da_to_va,
+	.parse_fw = qcom_register_dump_segments,
+	.load = adsp_load,
+};
+
+static int adsp_init_clock(struct qcom_adsp *adsp)
+{
+	int ret;
+
+	adsp->xo = devm_clk_get(adsp->dev, "xo");
+	if (IS_ERR(adsp->xo)) {
+		ret = PTR_ERR(adsp->xo);
+		if (ret != -EPROBE_DEFER)
+			dev_err(adsp->dev, "failed to get xo clock");
+		return ret;
+	}
+
+	if (adsp->has_aggre2_clk) {
+		adsp->aggre2_clk = devm_clk_get(adsp->dev, "aggre2");
+		if (IS_ERR(adsp->aggre2_clk)) {
+			ret = PTR_ERR(adsp->aggre2_clk);
+			if (ret != -EPROBE_DEFER)
+				dev_err(adsp->dev,
+					"failed to get aggre2 clock");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int adsp_init_regulator(struct qcom_adsp *adsp)
+{
+	adsp->cx_supply = devm_regulator_get(adsp->dev, "cx");
+	if (IS_ERR(adsp->cx_supply))
+		return PTR_ERR(adsp->cx_supply);
+
+	regulator_set_load(adsp->cx_supply, 100000);
+
+	adsp->px_supply = devm_regulator_get(adsp->dev, "px");
+	return PTR_ERR_OR_ZERO(adsp->px_supply);
+}
+
+static int adsp_alloc_memory_region(struct qcom_adsp *adsp)
+{
+	struct device_node *node;
+	struct resource r;
+	int ret;
+
+	node = of_parse_phandle(adsp->dev->of_node, "memory-region", 0);
+	if (!node) {
+		dev_err(adsp->dev, "no memory-region specified\n");
+		return -EINVAL;
+	}
+
+	ret = of_address_to_resource(node, 0, &r);
+	if (ret)
+		return ret;
+
+	adsp->mem_phys = adsp->mem_reloc = r.start;
+	adsp->mem_size = resource_size(&r);
+	adsp->mem_region = devm_ioremap_wc(adsp->dev, adsp->mem_phys, adsp->mem_size);
+	if (!adsp->mem_region) {
+		dev_err(adsp->dev, "unable to map memory region: %pa+%zx\n",
+			&r.start, adsp->mem_size);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int adsp_probe(struct platform_device *pdev)
+{
+	const struct adsp_data *desc;
+	struct qcom_adsp *adsp;
+	struct rproc *rproc;
+	int ret;
+
+	desc = of_device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
+
+	if (!qcom_scm_is_available())
+		return -EPROBE_DEFER;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &adsp_ops,
+			    desc->firmware_name, sizeof(*adsp));
+	if (!rproc) {
+		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+		return -ENOMEM;
+	}
+
+	adsp = (struct qcom_adsp *)rproc->priv;
+	adsp->dev = &pdev->dev;
+	adsp->rproc = rproc;
+	adsp->pas_id = desc->pas_id;
+	adsp->has_aggre2_clk = desc->has_aggre2_clk;
+	platform_set_drvdata(pdev, adsp);
+
+	ret = adsp_alloc_memory_region(adsp);
+	if (ret)
+		goto free_rproc;
+
+	ret = adsp_init_clock(adsp);
+	if (ret)
+		goto free_rproc;
+
+	ret = adsp_init_regulator(adsp);
+	if (ret)
+		goto free_rproc;
+
+	ret = qcom_q6v5_init(&adsp->q6v5, pdev, rproc, desc->crash_reason_smem,
+			     qcom_pas_handover);
+	if (ret)
+		goto free_rproc;
+
+	qcom_add_glink_subdev(rproc, &adsp->glink_subdev);
+	qcom_add_smd_subdev(rproc, &adsp->smd_subdev);
+	qcom_add_ssr_subdev(rproc, &adsp->ssr_subdev, desc->ssr_name);
+	adsp->sysmon = qcom_add_sysmon_subdev(rproc,
+					      desc->sysmon_name,
+					      desc->ssctl_id);
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_rproc;
+
+	return 0;
+
+free_rproc:
+	rproc_free(rproc);
+
+	return ret;
+}
+
+static int adsp_remove(struct platform_device *pdev)
+{
+	struct qcom_adsp *adsp = platform_get_drvdata(pdev);
+
+	rproc_del(adsp->rproc);
+
+	qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
+	qcom_remove_sysmon_subdev(adsp->sysmon);
+	qcom_remove_smd_subdev(adsp->rproc, &adsp->smd_subdev);
+	qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
+	rproc_free(adsp->rproc);
+
+	return 0;
+}
+
+static const struct adsp_data adsp_resource_init = {
+		.crash_reason_smem = 423,
+		.firmware_name = "adsp.mdt",
+		.pas_id = 1,
+		.has_aggre2_clk = false,
+		.ssr_name = "lpass",
+		.sysmon_name = "adsp",
+		.ssctl_id = 0x14,
+};
+
+static const struct adsp_data slpi_resource_init = {
+		.crash_reason_smem = 424,
+		.firmware_name = "slpi.mdt",
+		.pas_id = 12,
+		.has_aggre2_clk = true,
+		.ssr_name = "dsps",
+		.sysmon_name = "slpi",
+		.ssctl_id = 0x16,
+};
+
+static const struct of_device_id adsp_of_match[] = {
+	{ .compatible = "qcom,msm8974-adsp-pil", .data = &adsp_resource_init},
+	{ .compatible = "qcom,msm8996-adsp-pil", .data = &adsp_resource_init},
+	{ .compatible = "qcom,msm8996-slpi-pil", .data = &slpi_resource_init},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, adsp_of_match);
+
+static struct platform_driver adsp_driver = {
+	.probe = adsp_probe,
+	.remove = adsp_remove,
+	.driver = {
+		.name = "qcom_adsp_pil",
+		.of_match_table = adsp_of_match,
+	},
+};
+
+module_platform_driver(adsp_driver);
+MODULE_DESCRIPTION("Qualcomm MSM8974/MSM8996 ADSP Peripherial Image Loader");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
new file mode 100644
index 000000000..6f7784014
--- /dev/null
+++ b/drivers/remoteproc/qcom_common.c
@@ -0,0 +1,249 @@
+/*
+ * Qualcomm Peripheral Image Loader helpers
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2015 Sony Mobile Communications Inc
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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/firmware.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/remoteproc.h>
+#include <linux/rpmsg/qcom_glink.h>
+#include <linux/rpmsg/qcom_smd.h>
+#include <linux/soc/qcom/mdt_loader.h>
+
+#include "remoteproc_internal.h"
+#include "qcom_common.h"
+
+#define to_glink_subdev(d) container_of(d, struct qcom_rproc_glink, subdev)
+#define to_smd_subdev(d) container_of(d, struct qcom_rproc_subdev, subdev)
+#define to_ssr_subdev(d) container_of(d, struct qcom_rproc_ssr, subdev)
+
+static BLOCKING_NOTIFIER_HEAD(ssr_notifiers);
+
+static int glink_subdev_start(struct rproc_subdev *subdev)
+{
+	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
+
+	glink->edge = qcom_glink_smem_register(glink->dev, glink->node);
+
+	return PTR_ERR_OR_ZERO(glink->edge);
+}
+
+static void glink_subdev_stop(struct rproc_subdev *subdev, bool crashed)
+{
+	struct qcom_rproc_glink *glink = to_glink_subdev(subdev);
+
+	qcom_glink_smem_unregister(glink->edge);
+	glink->edge = NULL;
+}
+
+/**
+ * qcom_add_glink_subdev() - try to add a GLINK subdevice to rproc
+ * @rproc:	rproc handle to parent the subdevice
+ * @glink:	reference to a GLINK subdev context
+ */
+void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
+{
+	struct device *dev = &rproc->dev;
+
+	glink->node = of_get_child_by_name(dev->parent->of_node, "glink-edge");
+	if (!glink->node)
+		return;
+
+	glink->dev = dev;
+	glink->subdev.start = glink_subdev_start;
+	glink->subdev.stop = glink_subdev_stop;
+
+	rproc_add_subdev(rproc, &glink->subdev);
+}
+EXPORT_SYMBOL_GPL(qcom_add_glink_subdev);
+
+/**
+ * qcom_remove_glink_subdev() - remove a GLINK subdevice from rproc
+ * @rproc:	rproc handle
+ * @glink:	reference to a GLINK subdev context
+ */
+void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink)
+{
+	if (!glink->node)
+		return;
+
+	rproc_remove_subdev(rproc, &glink->subdev);
+	of_node_put(glink->node);
+}
+EXPORT_SYMBOL_GPL(qcom_remove_glink_subdev);
+
+/**
+ * qcom_register_dump_segments() - register segments for coredump
+ * @rproc:	remoteproc handle
+ * @fw:		firmware header
+ *
+ * Register all segments of the ELF in the remoteproc coredump segment list
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
+int qcom_register_dump_segments(struct rproc *rproc,
+				const struct firmware *fw)
+{
+	const struct elf32_phdr *phdrs;
+	const struct elf32_phdr *phdr;
+	const struct elf32_hdr *ehdr;
+	int ret;
+	int i;
+
+	ehdr = (struct elf32_hdr *)fw->data;
+	phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		phdr = &phdrs[i];
+
+		if (phdr->p_type != PT_LOAD)
+			continue;
+
+		if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
+			continue;
+
+		if (!phdr->p_memsz)
+			continue;
+
+		ret = rproc_coredump_add_segment(rproc, phdr->p_paddr,
+						 phdr->p_memsz);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_register_dump_segments);
+
+static int smd_subdev_start(struct rproc_subdev *subdev)
+{
+	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
+
+	smd->edge = qcom_smd_register_edge(smd->dev, smd->node);
+
+	return PTR_ERR_OR_ZERO(smd->edge);
+}
+
+static void smd_subdev_stop(struct rproc_subdev *subdev, bool crashed)
+{
+	struct qcom_rproc_subdev *smd = to_smd_subdev(subdev);
+
+	qcom_smd_unregister_edge(smd->edge);
+	smd->edge = NULL;
+}
+
+/**
+ * qcom_add_smd_subdev() - try to add a SMD subdevice to rproc
+ * @rproc:	rproc handle to parent the subdevice
+ * @smd:	reference to a Qualcomm subdev context
+ */
+void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
+{
+	struct device *dev = &rproc->dev;
+
+	smd->node = of_get_child_by_name(dev->parent->of_node, "smd-edge");
+	if (!smd->node)
+		return;
+
+	smd->dev = dev;
+	smd->subdev.start = smd_subdev_start;
+	smd->subdev.stop = smd_subdev_stop;
+
+	rproc_add_subdev(rproc, &smd->subdev);
+}
+EXPORT_SYMBOL_GPL(qcom_add_smd_subdev);
+
+/**
+ * qcom_remove_smd_subdev() - remove the smd subdevice from rproc
+ * @rproc:	rproc handle
+ * @smd:	the SMD subdevice to remove
+ */
+void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd)
+{
+	if (!smd->node)
+		return;
+
+	rproc_remove_subdev(rproc, &smd->subdev);
+	of_node_put(smd->node);
+}
+EXPORT_SYMBOL_GPL(qcom_remove_smd_subdev);
+
+/**
+ * qcom_register_ssr_notifier() - register SSR notification handler
+ * @nb:		notifier_block to notify for restart notifications
+ *
+ * Returns 0 on success, negative errno on failure.
+ *
+ * This register the @notify function as handler for restart notifications. As
+ * remote processors are stopped this function will be called, with the SSR
+ * name passed as a parameter.
+ */
+int qcom_register_ssr_notifier(struct notifier_block *nb)
+{
+	return blocking_notifier_chain_register(&ssr_notifiers, nb);
+}
+EXPORT_SYMBOL_GPL(qcom_register_ssr_notifier);
+
+/**
+ * qcom_unregister_ssr_notifier() - unregister SSR notification handler
+ * @nb:		notifier_block to unregister
+ */
+void qcom_unregister_ssr_notifier(struct notifier_block *nb)
+{
+	blocking_notifier_chain_unregister(&ssr_notifiers, nb);
+}
+EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier);
+
+static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed)
+{
+	struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev);
+
+	blocking_notifier_call_chain(&ssr_notifiers, 0, (void *)ssr->name);
+}
+
+/**
+ * qcom_add_ssr_subdev() - register subdevice as restart notification source
+ * @rproc:	rproc handle
+ * @ssr:	SSR subdevice handle
+ * @ssr_name:	identifier to use for notifications originating from @rproc
+ *
+ * As the @ssr is registered with the @rproc SSR events will be sent to all
+ * registered listeners in the system as the remoteproc is shut down.
+ */
+void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
+			 const char *ssr_name)
+{
+	ssr->name = ssr_name;
+	ssr->subdev.stop = ssr_notify_stop;
+
+	rproc_add_subdev(rproc, &ssr->subdev);
+}
+EXPORT_SYMBOL_GPL(qcom_add_ssr_subdev);
+
+/**
+ * qcom_remove_ssr_subdev() - remove subdevice as restart notification source
+ * @rproc:	rproc handle
+ * @ssr:	SSR subdevice handle
+ */
+void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr)
+{
+	rproc_remove_subdev(rproc, &ssr->subdev);
+}
+EXPORT_SYMBOL_GPL(qcom_remove_ssr_subdev);
+
+MODULE_DESCRIPTION("Qualcomm Remoteproc helper driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_common.h b/drivers/remoteproc/qcom_common.h
new file mode 100644
index 000000000..58de71e47
--- /dev/null
+++ b/drivers/remoteproc/qcom_common.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __RPROC_QCOM_COMMON_H__
+#define __RPROC_QCOM_COMMON_H__
+
+#include <linux/remoteproc.h>
+#include "remoteproc_internal.h"
+#include <linux/soc/qcom/qmi.h>
+
+struct qcom_sysmon;
+
+struct qcom_rproc_glink {
+	struct rproc_subdev subdev;
+
+	struct device *dev;
+	struct device_node *node;
+	struct qcom_glink *edge;
+};
+
+struct qcom_rproc_subdev {
+	struct rproc_subdev subdev;
+
+	struct device *dev;
+	struct device_node *node;
+	struct qcom_smd_edge *edge;
+};
+
+struct qcom_rproc_ssr {
+	struct rproc_subdev subdev;
+
+	const char *name;
+};
+
+void qcom_add_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
+void qcom_remove_glink_subdev(struct rproc *rproc, struct qcom_rproc_glink *glink);
+
+int qcom_register_dump_segments(struct rproc *rproc, const struct firmware *fw);
+
+void qcom_add_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);
+void qcom_remove_smd_subdev(struct rproc *rproc, struct qcom_rproc_subdev *smd);
+
+void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr,
+			 const char *ssr_name);
+void qcom_remove_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr);
+
+#if IS_ENABLED(CONFIG_QCOM_SYSMON)
+struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+					   const char *name,
+					   int ssctl_instance);
+void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon);
+#else
+static inline struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+							 const char *name,
+							 int ssctl_instance)
+{
+	return NULL;
+}
+
+static inline void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon)
+{
+}
+#endif
+
+#endif
diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c
new file mode 100644
index 000000000..ef61cb709
--- /dev/null
+++ b/drivers/remoteproc/qcom_q6v5.c
@@ -0,0 +1,293 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Qualcomm Peripheral Image Loader for Q6V5
+ *
+ * Copyright (C) 2016-2018 Linaro Ltd.
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ */
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+#include <linux/remoteproc.h>
+#include "qcom_q6v5.h"
+
+/**
+ * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start
+ * @q6v5:	reference to qcom_q6v5 context to be reinitialized
+ *
+ * Return: 0 on success, negative errno on failure
+ */
+int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
+{
+	reinit_completion(&q6v5->start_done);
+	reinit_completion(&q6v5->stop_done);
+
+	q6v5->running = true;
+	q6v5->handover_issued = false;
+
+	enable_irq(q6v5->handover_irq);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_prepare);
+
+/**
+ * qcom_q6v5_unprepare() - unprepare the qcom_q6v5 context after stop
+ * @q6v5:	reference to qcom_q6v5 context to be unprepared
+ *
+ * Return: 0 on success, 1 if handover hasn't yet been called
+ */
+int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
+{
+	disable_irq(q6v5->handover_irq);
+
+	return !q6v5->handover_issued;
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
+
+static irqreturn_t q6v5_wdog_interrupt(int irq, void *data)
+{
+	struct qcom_q6v5 *q6v5 = data;
+	size_t len;
+	char *msg;
+
+	/* Sometimes the stop triggers a watchdog rather than a stop-ack */
+	if (!q6v5->running) {
+		complete(&q6v5->stop_done);
+		return IRQ_HANDLED;
+	}
+
+	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
+	if (!IS_ERR(msg) && len > 0 && msg[0])
+		dev_err(q6v5->dev, "watchdog received: %s\n", msg);
+	else
+		dev_err(q6v5->dev, "watchdog without message\n");
+
+	rproc_report_crash(q6v5->rproc, RPROC_WATCHDOG);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t q6v5_fatal_interrupt(int irq, void *data)
+{
+	struct qcom_q6v5 *q6v5 = data;
+	size_t len;
+	char *msg;
+
+	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, q6v5->crash_reason, &len);
+	if (!IS_ERR(msg) && len > 0 && msg[0])
+		dev_err(q6v5->dev, "fatal error received: %s\n", msg);
+	else
+		dev_err(q6v5->dev, "fatal error without message\n");
+
+	q6v5->running = false;
+	rproc_report_crash(q6v5->rproc, RPROC_FATAL_ERROR);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t q6v5_ready_interrupt(int irq, void *data)
+{
+	struct qcom_q6v5 *q6v5 = data;
+
+	complete(&q6v5->start_done);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * qcom_q6v5_wait_for_start() - wait for remote processor start signal
+ * @q6v5:	reference to qcom_q6v5 context
+ * @timeout:	timeout to wait for the event, in jiffies
+ *
+ * qcom_q6v5_unprepare() should not be called when this function fails.
+ *
+ * Return: 0 on success, -ETIMEDOUT on timeout
+ */
+int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout)
+{
+	int ret;
+
+	ret = wait_for_completion_timeout(&q6v5->start_done, timeout);
+	if (!ret)
+		disable_irq(q6v5->handover_irq);
+
+	return !ret ? -ETIMEDOUT : 0;
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_wait_for_start);
+
+static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
+{
+	struct qcom_q6v5 *q6v5 = data;
+
+	if (q6v5->handover)
+		q6v5->handover(q6v5);
+
+	q6v5->handover_issued = true;
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t q6v5_stop_interrupt(int irq, void *data)
+{
+	struct qcom_q6v5 *q6v5 = data;
+
+	complete(&q6v5->stop_done);
+
+	return IRQ_HANDLED;
+}
+
+/**
+ * qcom_q6v5_request_stop() - request the remote processor to stop
+ * @q6v5:	reference to qcom_q6v5 context
+ *
+ * Return: 0 on success, negative errno on failure
+ */
+int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5)
+{
+	int ret;
+
+	q6v5->running = false;
+
+	qcom_smem_state_update_bits(q6v5->state,
+				    BIT(q6v5->stop_bit), BIT(q6v5->stop_bit));
+
+	ret = wait_for_completion_timeout(&q6v5->stop_done, 5 * HZ);
+
+	qcom_smem_state_update_bits(q6v5->state, BIT(q6v5->stop_bit), 0);
+
+	return ret == 0 ? -ETIMEDOUT : 0;
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop);
+
+/**
+ * qcom_q6v5_init() - initializer of the q6v5 common struct
+ * @q6v5:	handle to be initialized
+ * @pdev:	platform_device reference for acquiring resources
+ * @rproc:	associated remoteproc instance
+ * @crash_reason: SMEM id for crash reason string, or 0 if none
+ * @handover:	function to be called when proxy resources should be released
+ *
+ * Return: 0 on success, negative errno on failure
+ */
+int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
+		   struct rproc *rproc, int crash_reason,
+		   void (*handover)(struct qcom_q6v5 *q6v5))
+{
+	int ret;
+
+	q6v5->rproc = rproc;
+	q6v5->dev = &pdev->dev;
+	q6v5->crash_reason = crash_reason;
+	q6v5->handover = handover;
+
+	init_completion(&q6v5->start_done);
+	init_completion(&q6v5->stop_done);
+
+	q6v5->wdog_irq = platform_get_irq_byname(pdev, "wdog");
+	if (q6v5->wdog_irq < 0) {
+		if (q6v5->wdog_irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"failed to retrieve wdog IRQ: %d\n",
+				q6v5->wdog_irq);
+		return q6v5->wdog_irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, q6v5->wdog_irq,
+					NULL, q6v5_wdog_interrupt,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"q6v5 wdog", q6v5);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to acquire wdog IRQ\n");
+		return ret;
+	}
+
+	q6v5->fatal_irq = platform_get_irq_byname(pdev, "fatal");
+	if (q6v5->fatal_irq < 0) {
+		if (q6v5->fatal_irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"failed to retrieve fatal IRQ: %d\n",
+				q6v5->fatal_irq);
+		return q6v5->fatal_irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, q6v5->fatal_irq,
+					NULL, q6v5_fatal_interrupt,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"q6v5 fatal", q6v5);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to acquire fatal IRQ\n");
+		return ret;
+	}
+
+	q6v5->ready_irq = platform_get_irq_byname(pdev, "ready");
+	if (q6v5->ready_irq < 0) {
+		if (q6v5->ready_irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"failed to retrieve ready IRQ: %d\n",
+				q6v5->ready_irq);
+		return q6v5->ready_irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, q6v5->ready_irq,
+					NULL, q6v5_ready_interrupt,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"q6v5 ready", q6v5);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to acquire ready IRQ\n");
+		return ret;
+	}
+
+	q6v5->handover_irq = platform_get_irq_byname(pdev, "handover");
+	if (q6v5->handover_irq < 0) {
+		if (q6v5->handover_irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"failed to retrieve handover IRQ: %d\n",
+				q6v5->handover_irq);
+		return q6v5->handover_irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, q6v5->handover_irq,
+					NULL, q6v5_handover_interrupt,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"q6v5 handover", q6v5);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to acquire handover IRQ\n");
+		return ret;
+	}
+	disable_irq(q6v5->handover_irq);
+
+	q6v5->stop_irq = platform_get_irq_byname(pdev, "stop-ack");
+	if (q6v5->stop_irq < 0) {
+		if (q6v5->stop_irq != -EPROBE_DEFER)
+			dev_err(&pdev->dev,
+				"failed to retrieve stop-ack IRQ: %d\n",
+				q6v5->stop_irq);
+		return q6v5->stop_irq;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, q6v5->stop_irq,
+					NULL, q6v5_stop_interrupt,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"q6v5 stop", q6v5);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to acquire stop-ack IRQ\n");
+		return ret;
+	}
+
+	q6v5->state = qcom_smem_state_get(&pdev->dev, "stop", &q6v5->stop_bit);
+	if (IS_ERR(q6v5->state)) {
+		dev_err(&pdev->dev, "failed to acquire stop state\n");
+		return PTR_ERR(q6v5->state);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(qcom_q6v5_init);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Qualcomm Peripheral Image Loader for Q6V5");
diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h
new file mode 100644
index 000000000..7ac92c1e0
--- /dev/null
+++ b/drivers/remoteproc/qcom_q6v5.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef __QCOM_Q6V5_H__
+#define __QCOM_Q6V5_H__
+
+#include <linux/kernel.h>
+#include <linux/completion.h>
+
+struct rproc;
+struct qcom_smem_state;
+
+struct qcom_q6v5 {
+	struct device *dev;
+	struct rproc *rproc;
+
+	struct qcom_smem_state *state;
+	unsigned stop_bit;
+
+	int wdog_irq;
+	int fatal_irq;
+	int ready_irq;
+	int handover_irq;
+	int stop_irq;
+
+	bool handover_issued;
+
+	struct completion start_done;
+	struct completion stop_done;
+
+	int crash_reason;
+
+	bool running;
+
+	void (*handover)(struct qcom_q6v5 *q6v5);
+};
+
+int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
+		   struct rproc *rproc, int crash_reason,
+		   void (*handover)(struct qcom_q6v5 *q6v5));
+
+int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5);
+int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5);
+int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5);
+int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout);
+
+#endif
diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
new file mode 100644
index 000000000..604828c04
--- /dev/null
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -0,0 +1,1396 @@
+/*
+ * Qualcomm Peripheral Image Loader
+ *
+ * Copyright (C) 2016 Linaro Ltd.
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/iopoll.h>
+
+#include "remoteproc_internal.h"
+#include "qcom_common.h"
+#include "qcom_q6v5.h"
+
+#include <linux/qcom_scm.h>
+
+#define MPSS_CRASH_REASON_SMEM		421
+
+/* RMB Status Register Values */
+#define RMB_PBL_SUCCESS			0x1
+
+#define RMB_MBA_XPU_UNLOCKED		0x1
+#define RMB_MBA_XPU_UNLOCKED_SCRIBBLED	0x2
+#define RMB_MBA_META_DATA_AUTH_SUCCESS	0x3
+#define RMB_MBA_AUTH_COMPLETE		0x4
+
+/* PBL/MBA interface registers */
+#define RMB_MBA_IMAGE_REG		0x00
+#define RMB_PBL_STATUS_REG		0x04
+#define RMB_MBA_COMMAND_REG		0x08
+#define RMB_MBA_STATUS_REG		0x0C
+#define RMB_PMI_META_DATA_REG		0x10
+#define RMB_PMI_CODE_START_REG		0x14
+#define RMB_PMI_CODE_LENGTH_REG		0x18
+#define RMB_MBA_MSS_STATUS		0x40
+#define RMB_MBA_ALT_RESET		0x44
+
+#define RMB_CMD_META_DATA_READY		0x1
+#define RMB_CMD_LOAD_READY		0x2
+
+/* QDSP6SS Register Offsets */
+#define QDSP6SS_RESET_REG		0x014
+#define QDSP6SS_GFMUX_CTL_REG		0x020
+#define QDSP6SS_PWR_CTL_REG		0x030
+#define QDSP6SS_MEM_PWR_CTL		0x0B0
+#define QDSP6SS_STRAP_ACC		0x110
+
+/* AXI Halt Register Offsets */
+#define AXI_HALTREQ_REG			0x0
+#define AXI_HALTACK_REG			0x4
+#define AXI_IDLE_REG			0x8
+
+#define HALT_ACK_TIMEOUT_MS		100
+
+/* QDSP6SS_RESET */
+#define Q6SS_STOP_CORE			BIT(0)
+#define Q6SS_CORE_ARES			BIT(1)
+#define Q6SS_BUS_ARES_ENABLE		BIT(2)
+
+/* QDSP6SS_GFMUX_CTL */
+#define Q6SS_CLK_ENABLE			BIT(1)
+
+/* QDSP6SS_PWR_CTL */
+#define Q6SS_L2DATA_SLP_NRET_N_0	BIT(0)
+#define Q6SS_L2DATA_SLP_NRET_N_1	BIT(1)
+#define Q6SS_L2DATA_SLP_NRET_N_2	BIT(2)
+#define Q6SS_L2TAG_SLP_NRET_N		BIT(16)
+#define Q6SS_ETB_SLP_NRET_N		BIT(17)
+#define Q6SS_L2DATA_STBY_N		BIT(18)
+#define Q6SS_SLP_RET_N			BIT(19)
+#define Q6SS_CLAMP_IO			BIT(20)
+#define QDSS_BHS_ON			BIT(21)
+#define QDSS_LDO_BYP			BIT(22)
+
+/* QDSP6v56 parameters */
+#define QDSP6v56_LDO_BYP		BIT(25)
+#define QDSP6v56_BHS_ON		BIT(24)
+#define QDSP6v56_CLAMP_WL		BIT(21)
+#define QDSP6v56_CLAMP_QMC_MEM		BIT(22)
+#define HALT_CHECK_MAX_LOOPS		200
+#define QDSP6SS_XO_CBCR		0x0038
+#define QDSP6SS_ACC_OVERRIDE_VAL		0x20
+
+/* QDSP6v65 parameters */
+#define QDSP6SS_SLEEP                   0x3C
+#define QDSP6SS_BOOT_CORE_START         0x400
+#define QDSP6SS_BOOT_CMD                0x404
+#define SLEEP_CHECK_MAX_LOOPS           200
+#define BOOT_FSM_TIMEOUT                10000
+
+struct reg_info {
+	struct regulator *reg;
+	int uV;
+	int uA;
+};
+
+struct qcom_mss_reg_res {
+	const char *supply;
+	int uV;
+	int uA;
+};
+
+struct rproc_hexagon_res {
+	const char *hexagon_mba_image;
+	struct qcom_mss_reg_res *proxy_supply;
+	struct qcom_mss_reg_res *active_supply;
+	char **proxy_clk_names;
+	char **reset_clk_names;
+	char **active_clk_names;
+	int version;
+	bool need_mem_protection;
+	bool has_alt_reset;
+};
+
+struct q6v5 {
+	struct device *dev;
+	struct rproc *rproc;
+
+	void __iomem *reg_base;
+	void __iomem *rmb_base;
+
+	struct regmap *halt_map;
+	u32 halt_q6;
+	u32 halt_modem;
+	u32 halt_nc;
+
+	struct reset_control *mss_restart;
+
+	struct qcom_q6v5 q6v5;
+
+	struct clk *active_clks[8];
+	struct clk *reset_clks[4];
+	struct clk *proxy_clks[4];
+	int active_clk_count;
+	int reset_clk_count;
+	int proxy_clk_count;
+
+	struct reg_info active_regs[1];
+	struct reg_info proxy_regs[3];
+	int active_reg_count;
+	int proxy_reg_count;
+
+	bool running;
+
+	phys_addr_t mba_phys;
+	void *mba_region;
+	size_t mba_size;
+
+	phys_addr_t mpss_phys;
+	phys_addr_t mpss_reloc;
+	void *mpss_region;
+	size_t mpss_size;
+
+	struct qcom_rproc_glink glink_subdev;
+	struct qcom_rproc_subdev smd_subdev;
+	struct qcom_rproc_ssr ssr_subdev;
+	struct qcom_sysmon *sysmon;
+	bool need_mem_protection;
+	bool has_alt_reset;
+	int mpss_perm;
+	int mba_perm;
+	int version;
+};
+
+enum {
+	MSS_MSM8916,
+	MSS_MSM8974,
+	MSS_MSM8996,
+	MSS_SDM845,
+};
+
+static int q6v5_regulator_init(struct device *dev, struct reg_info *regs,
+			       const struct qcom_mss_reg_res *reg_res)
+{
+	int rc;
+	int i;
+
+	if (!reg_res)
+		return 0;
+
+	for (i = 0; reg_res[i].supply; i++) {
+		regs[i].reg = devm_regulator_get(dev, reg_res[i].supply);
+		if (IS_ERR(regs[i].reg)) {
+			rc = PTR_ERR(regs[i].reg);
+			if (rc != -EPROBE_DEFER)
+				dev_err(dev, "Failed to get %s\n regulator",
+					reg_res[i].supply);
+			return rc;
+		}
+
+		regs[i].uV = reg_res[i].uV;
+		regs[i].uA = reg_res[i].uA;
+	}
+
+	return i;
+}
+
+static int q6v5_regulator_enable(struct q6v5 *qproc,
+				 struct reg_info *regs, int count)
+{
+	int ret;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		if (regs[i].uV > 0) {
+			ret = regulator_set_voltage(regs[i].reg,
+					regs[i].uV, INT_MAX);
+			if (ret) {
+				dev_err(qproc->dev,
+					"Failed to request voltage for %d.\n",
+						i);
+				goto err;
+			}
+		}
+
+		if (regs[i].uA > 0) {
+			ret = regulator_set_load(regs[i].reg,
+						 regs[i].uA);
+			if (ret < 0) {
+				dev_err(qproc->dev,
+					"Failed to set regulator mode\n");
+				goto err;
+			}
+		}
+
+		ret = regulator_enable(regs[i].reg);
+		if (ret) {
+			dev_err(qproc->dev, "Regulator enable failed\n");
+			goto err;
+		}
+	}
+
+	return 0;
+err:
+	for (; i >= 0; i--) {
+		if (regs[i].uV > 0)
+			regulator_set_voltage(regs[i].reg, 0, INT_MAX);
+
+		if (regs[i].uA > 0)
+			regulator_set_load(regs[i].reg, 0);
+
+		regulator_disable(regs[i].reg);
+	}
+
+	return ret;
+}
+
+static void q6v5_regulator_disable(struct q6v5 *qproc,
+				   struct reg_info *regs, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++) {
+		if (regs[i].uV > 0)
+			regulator_set_voltage(regs[i].reg, 0, INT_MAX);
+
+		if (regs[i].uA > 0)
+			regulator_set_load(regs[i].reg, 0);
+
+		regulator_disable(regs[i].reg);
+	}
+}
+
+static int q6v5_clk_enable(struct device *dev,
+			   struct clk **clks, int count)
+{
+	int rc;
+	int i;
+
+	for (i = 0; i < count; i++) {
+		rc = clk_prepare_enable(clks[i]);
+		if (rc) {
+			dev_err(dev, "Clock enable failed\n");
+			goto err;
+		}
+	}
+
+	return 0;
+err:
+	for (i--; i >= 0; i--)
+		clk_disable_unprepare(clks[i]);
+
+	return rc;
+}
+
+static void q6v5_clk_disable(struct device *dev,
+			     struct clk **clks, int count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		clk_disable_unprepare(clks[i]);
+}
+
+static int q6v5_xfer_mem_ownership(struct q6v5 *qproc, int *current_perm,
+				   bool remote_owner, phys_addr_t addr,
+				   size_t size)
+{
+	struct qcom_scm_vmperm next;
+
+	if (!qproc->need_mem_protection)
+		return 0;
+	if (remote_owner && *current_perm == BIT(QCOM_SCM_VMID_MSS_MSA))
+		return 0;
+	if (!remote_owner && *current_perm == BIT(QCOM_SCM_VMID_HLOS))
+		return 0;
+
+	next.vmid = remote_owner ? QCOM_SCM_VMID_MSS_MSA : QCOM_SCM_VMID_HLOS;
+	next.perm = remote_owner ? QCOM_SCM_PERM_RW : QCOM_SCM_PERM_RWX;
+
+	return qcom_scm_assign_mem(addr, ALIGN(size, SZ_4K),
+				   current_perm, &next, 1);
+}
+
+static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
+{
+	struct q6v5 *qproc = rproc->priv;
+
+	/* MBA is restricted to a maximum size of 1M */
+	if (fw->size > qproc->mba_size || fw->size > SZ_1M) {
+		dev_err(qproc->dev, "MBA firmware load failed\n");
+		return -EINVAL;
+	}
+
+	memcpy(qproc->mba_region, fw->data, fw->size);
+
+	return 0;
+}
+
+static int q6v5_reset_assert(struct q6v5 *qproc)
+{
+	if (qproc->has_alt_reset)
+		return reset_control_reset(qproc->mss_restart);
+	else
+		return reset_control_assert(qproc->mss_restart);
+}
+
+static int q6v5_reset_deassert(struct q6v5 *qproc)
+{
+	int ret;
+
+	if (qproc->has_alt_reset) {
+		writel(1, qproc->rmb_base + RMB_MBA_ALT_RESET);
+		ret = reset_control_reset(qproc->mss_restart);
+		writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
+	} else {
+		ret = reset_control_deassert(qproc->mss_restart);
+	}
+
+	return ret;
+}
+
+static int q6v5_rmb_pbl_wait(struct q6v5 *qproc, int ms)
+{
+	unsigned long timeout;
+	s32 val;
+
+	timeout = jiffies + msecs_to_jiffies(ms);
+	for (;;) {
+		val = readl(qproc->rmb_base + RMB_PBL_STATUS_REG);
+		if (val)
+			break;
+
+		if (time_after(jiffies, timeout))
+			return -ETIMEDOUT;
+
+		msleep(1);
+	}
+
+	return val;
+}
+
+static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)
+{
+
+	unsigned long timeout;
+	s32 val;
+
+	timeout = jiffies + msecs_to_jiffies(ms);
+	for (;;) {
+		val = readl(qproc->rmb_base + RMB_MBA_STATUS_REG);
+		if (val < 0)
+			break;
+
+		if (!status && val)
+			break;
+		else if (status && val == status)
+			break;
+
+		if (time_after(jiffies, timeout))
+			return -ETIMEDOUT;
+
+		msleep(1);
+	}
+
+	return val;
+}
+
+static int q6v5proc_reset(struct q6v5 *qproc)
+{
+	u32 val;
+	int ret;
+	int i;
+
+	if (qproc->version == MSS_SDM845) {
+		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
+		val |= 0x1;
+		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
+
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_SLEEP,
+					 val, !(val & BIT(31)), 1,
+					 SLEEP_CHECK_MAX_LOOPS);
+		if (ret) {
+			dev_err(qproc->dev, "QDSP6SS Sleep clock timed out\n");
+			return -ETIMEDOUT;
+		}
+
+		/* De-assert QDSP6 stop core */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CORE_START);
+		/* Trigger boot FSM */
+		writel(1, qproc->reg_base + QDSP6SS_BOOT_CMD);
+
+		ret = readl_poll_timeout(qproc->rmb_base + RMB_MBA_MSS_STATUS,
+				val, (val & BIT(0)) != 0, 10, BOOT_FSM_TIMEOUT);
+		if (ret) {
+			dev_err(qproc->dev, "Boot FSM failed to complete.\n");
+			/* Reset the modem so that boot FSM is in reset state */
+			q6v5_reset_deassert(qproc);
+			return ret;
+		}
+
+		goto pbl_wait;
+	} else if (qproc->version == MSS_MSM8996) {
+		/* Override the ACC value if required */
+		writel(QDSP6SS_ACC_OVERRIDE_VAL,
+		       qproc->reg_base + QDSP6SS_STRAP_ACC);
+
+		/* Assert resets, stop core */
+		val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+		val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
+		writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+		/* BHS require xo cbcr to be enabled */
+		val = readl(qproc->reg_base + QDSP6SS_XO_CBCR);
+		val |= 0x1;
+		writel(val, qproc->reg_base + QDSP6SS_XO_CBCR);
+
+		/* Read CLKOFF bit to go low indicating CLK is enabled */
+		ret = readl_poll_timeout(qproc->reg_base + QDSP6SS_XO_CBCR,
+					 val, !(val & BIT(31)), 1,
+					 HALT_CHECK_MAX_LOOPS);
+		if (ret) {
+			dev_err(qproc->dev,
+				"xo cbcr enabling timed out (rc:%d)\n", ret);
+			return ret;
+		}
+		/* Enable power block headswitch and wait for it to stabilize */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= QDSP6v56_BHS_ON;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		udelay(1);
+
+		/* Put LDO in bypass mode */
+		val |= QDSP6v56_LDO_BYP;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+		/* Deassert QDSP6 compiler memory clamp */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val &= ~QDSP6v56_CLAMP_QMC_MEM;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+		/* Deassert memory peripheral sleep and L2 memory standby */
+		val |= Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+		/* Turn on L1, L2, ETB and JU memories 1 at a time */
+		val = readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+		for (i = 19; i >= 0; i--) {
+			val |= BIT(i);
+			writel(val, qproc->reg_base +
+						QDSP6SS_MEM_PWR_CTL);
+			/*
+			 * Read back value to ensure the write is done then
+			 * wait for 1us for both memory peripheral and data
+			 * array to turn on.
+			 */
+			val |= readl(qproc->reg_base + QDSP6SS_MEM_PWR_CTL);
+			udelay(1);
+		}
+		/* Remove word line clamp */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val &= ~QDSP6v56_CLAMP_WL;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+	} else {
+		/* Assert resets, stop core */
+		val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+		val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
+		writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+		/* Enable power block headswitch and wait for it to stabilize */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= QDSS_BHS_ON | QDSS_LDO_BYP;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		udelay(1);
+		/*
+		 * Turn on memories. L2 banks should be done individually
+		 * to minimize inrush current.
+		 */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= Q6SS_SLP_RET_N | Q6SS_L2TAG_SLP_NRET_N |
+			Q6SS_ETB_SLP_NRET_N | Q6SS_L2DATA_STBY_N;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= Q6SS_L2DATA_SLP_NRET_N_2;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= Q6SS_L2DATA_SLP_NRET_N_1;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= Q6SS_L2DATA_SLP_NRET_N_0;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+	}
+	/* Remove IO clamp */
+	val &= ~Q6SS_CLAMP_IO;
+	writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+
+	/* Bring core out of reset */
+	val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+	val &= ~Q6SS_CORE_ARES;
+	writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+	/* Turn on core clock */
+	val = readl(qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
+	val |= Q6SS_CLK_ENABLE;
+	writel(val, qproc->reg_base + QDSP6SS_GFMUX_CTL_REG);
+
+	/* Start core execution */
+	val = readl(qproc->reg_base + QDSP6SS_RESET_REG);
+	val &= ~Q6SS_STOP_CORE;
+	writel(val, qproc->reg_base + QDSP6SS_RESET_REG);
+
+pbl_wait:
+	/* Wait for PBL status */
+	ret = q6v5_rmb_pbl_wait(qproc, 1000);
+	if (ret == -ETIMEDOUT) {
+		dev_err(qproc->dev, "PBL boot timed out\n");
+	} else if (ret != RMB_PBL_SUCCESS) {
+		dev_err(qproc->dev, "PBL returned unexpected status %d\n", ret);
+		ret = -EINVAL;
+	} else {
+		ret = 0;
+	}
+
+	return ret;
+}
+
+static void q6v5proc_halt_axi_port(struct q6v5 *qproc,
+				   struct regmap *halt_map,
+				   u32 offset)
+{
+	unsigned long timeout;
+	unsigned int val;
+	int ret;
+
+	/* Check if we're already idle */
+	ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
+	if (!ret && val)
+		return;
+
+	/* Assert halt request */
+	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);
+
+	/* Wait for halt */
+	timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
+	for (;;) {
+		ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
+		if (ret || val || time_after(jiffies, timeout))
+			break;
+
+		msleep(1);
+	}
+
+	ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
+	if (ret || !val)
+		dev_err(qproc->dev, "port failed halt\n");
+
+	/* Clear halt request (port will remain halted until reset) */
+	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
+}
+
+static int q6v5_mpss_init_image(struct q6v5 *qproc, const struct firmware *fw)
+{
+	unsigned long dma_attrs = DMA_ATTR_FORCE_CONTIGUOUS;
+	dma_addr_t phys;
+	int mdata_perm;
+	int xferop_ret;
+	void *ptr;
+	int ret;
+
+	ptr = dma_alloc_attrs(qproc->dev, fw->size, &phys, GFP_KERNEL, dma_attrs);
+	if (!ptr) {
+		dev_err(qproc->dev, "failed to allocate mdt buffer\n");
+		return -ENOMEM;
+	}
+
+	memcpy(ptr, fw->data, fw->size);
+
+	/* Hypervisor mapping to access metadata by modem */
+	mdata_perm = BIT(QCOM_SCM_VMID_HLOS);
+	ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm,
+				      true, phys, fw->size);
+	if (ret) {
+		dev_err(qproc->dev,
+			"assigning Q6 access to metadata failed: %d\n", ret);
+		ret = -EAGAIN;
+		goto free_dma_attrs;
+	}
+
+	writel(phys, qproc->rmb_base + RMB_PMI_META_DATA_REG);
+	writel(RMB_CMD_META_DATA_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
+
+	ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_META_DATA_AUTH_SUCCESS, 1000);
+	if (ret == -ETIMEDOUT)
+		dev_err(qproc->dev, "MPSS header authentication timed out\n");
+	else if (ret < 0)
+		dev_err(qproc->dev, "MPSS header authentication failed: %d\n", ret);
+
+	/* Metadata authentication done, remove modem access */
+	xferop_ret = q6v5_xfer_mem_ownership(qproc, &mdata_perm,
+					     false, phys, fw->size);
+	if (xferop_ret)
+		dev_warn(qproc->dev,
+			 "mdt buffer not reclaimed system may become unstable\n");
+
+free_dma_attrs:
+	dma_free_attrs(qproc->dev, fw->size, ptr, phys, dma_attrs);
+
+	return ret < 0 ? ret : 0;
+}
+
+static bool q6v5_phdr_valid(const struct elf32_phdr *phdr)
+{
+	if (phdr->p_type != PT_LOAD)
+		return false;
+
+	if ((phdr->p_flags & QCOM_MDT_TYPE_MASK) == QCOM_MDT_TYPE_HASH)
+		return false;
+
+	if (!phdr->p_memsz)
+		return false;
+
+	return true;
+}
+
+static int q6v5_mpss_load(struct q6v5 *qproc)
+{
+	const struct elf32_phdr *phdrs;
+	const struct elf32_phdr *phdr;
+	const struct firmware *seg_fw;
+	const struct firmware *fw;
+	struct elf32_hdr *ehdr;
+	phys_addr_t mpss_reloc;
+	phys_addr_t boot_addr;
+	phys_addr_t min_addr = PHYS_ADDR_MAX;
+	phys_addr_t max_addr = 0;
+	bool relocate = false;
+	char seg_name[10];
+	ssize_t offset;
+	size_t size = 0;
+	void *ptr;
+	int ret;
+	int i;
+
+	ret = request_firmware(&fw, "modem.mdt", qproc->dev);
+	if (ret < 0) {
+		dev_err(qproc->dev, "unable to load modem.mdt\n");
+		return ret;
+	}
+
+	/* Initialize the RMB validator */
+	writel(0, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
+
+	ret = q6v5_mpss_init_image(qproc, fw);
+	if (ret)
+		goto release_firmware;
+
+	ehdr = (struct elf32_hdr *)fw->data;
+	phdrs = (struct elf32_phdr *)(ehdr + 1);
+
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		phdr = &phdrs[i];
+
+		if (!q6v5_phdr_valid(phdr))
+			continue;
+
+		if (phdr->p_flags & QCOM_MDT_RELOCATABLE)
+			relocate = true;
+
+		if (phdr->p_paddr < min_addr)
+			min_addr = phdr->p_paddr;
+
+		if (phdr->p_paddr + phdr->p_memsz > max_addr)
+			max_addr = ALIGN(phdr->p_paddr + phdr->p_memsz, SZ_4K);
+	}
+
+	mpss_reloc = relocate ? min_addr : qproc->mpss_phys;
+	/* Load firmware segments */
+	for (i = 0; i < ehdr->e_phnum; i++) {
+		phdr = &phdrs[i];
+
+		if (!q6v5_phdr_valid(phdr))
+			continue;
+
+		offset = phdr->p_paddr - mpss_reloc;
+		if (offset < 0 || offset + phdr->p_memsz > qproc->mpss_size) {
+			dev_err(qproc->dev, "segment outside memory range\n");
+			ret = -EINVAL;
+			goto release_firmware;
+		}
+
+		ptr = qproc->mpss_region + offset;
+
+		if (phdr->p_filesz) {
+			snprintf(seg_name, sizeof(seg_name), "modem.b%02d", i);
+			ret = request_firmware_into_buf(&seg_fw, seg_name, qproc->dev,
+							ptr, phdr->p_filesz);
+			if (ret) {
+				dev_err(qproc->dev, "failed to load %s\n", seg_name);
+				goto release_firmware;
+			}
+
+			release_firmware(seg_fw);
+		}
+
+		if (phdr->p_memsz > phdr->p_filesz) {
+			memset(ptr + phdr->p_filesz, 0,
+			       phdr->p_memsz - phdr->p_filesz);
+		}
+		size += phdr->p_memsz;
+	}
+
+	/* Transfer ownership of modem ddr region to q6 */
+	ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, true,
+				      qproc->mpss_phys, qproc->mpss_size);
+	if (ret) {
+		dev_err(qproc->dev,
+			"assigning Q6 access to mpss memory failed: %d\n", ret);
+		ret = -EAGAIN;
+		goto release_firmware;
+	}
+
+	boot_addr = relocate ? qproc->mpss_phys : min_addr;
+	writel(boot_addr, qproc->rmb_base + RMB_PMI_CODE_START_REG);
+	writel(RMB_CMD_LOAD_READY, qproc->rmb_base + RMB_MBA_COMMAND_REG);
+	writel(size, qproc->rmb_base + RMB_PMI_CODE_LENGTH_REG);
+
+	ret = q6v5_rmb_mba_wait(qproc, RMB_MBA_AUTH_COMPLETE, 10000);
+	if (ret == -ETIMEDOUT)
+		dev_err(qproc->dev, "MPSS authentication timed out\n");
+	else if (ret < 0)
+		dev_err(qproc->dev, "MPSS authentication failed: %d\n", ret);
+
+release_firmware:
+	release_firmware(fw);
+
+	return ret < 0 ? ret : 0;
+}
+
+static int q6v5_start(struct rproc *rproc)
+{
+	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
+	int xfermemop_ret;
+	int ret;
+
+	qcom_q6v5_prepare(&qproc->q6v5);
+
+	ret = q6v5_regulator_enable(qproc, qproc->proxy_regs,
+				    qproc->proxy_reg_count);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable proxy supplies\n");
+		goto disable_irqs;
+	}
+
+	ret = q6v5_clk_enable(qproc->dev, qproc->proxy_clks,
+			      qproc->proxy_clk_count);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable proxy clocks\n");
+		goto disable_proxy_reg;
+	}
+
+	ret = q6v5_regulator_enable(qproc, qproc->active_regs,
+				    qproc->active_reg_count);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable supplies\n");
+		goto disable_proxy_clk;
+	}
+
+	ret = q6v5_clk_enable(qproc->dev, qproc->reset_clks,
+			      qproc->reset_clk_count);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable reset clocks\n");
+		goto disable_vdd;
+	}
+
+	ret = q6v5_reset_deassert(qproc);
+	if (ret) {
+		dev_err(qproc->dev, "failed to deassert mss restart\n");
+		goto disable_reset_clks;
+	}
+
+	ret = q6v5_clk_enable(qproc->dev, qproc->active_clks,
+			      qproc->active_clk_count);
+	if (ret) {
+		dev_err(qproc->dev, "failed to enable clocks\n");
+		goto assert_reset;
+	}
+
+	/* Assign MBA image access in DDR to q6 */
+	ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
+				      qproc->mba_phys, qproc->mba_size);
+	if (ret) {
+		dev_err(qproc->dev,
+			"assigning Q6 access to mba memory failed: %d\n", ret);
+		goto disable_active_clks;
+	}
+
+	writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG);
+
+	ret = q6v5proc_reset(qproc);
+	if (ret)
+		goto reclaim_mba;
+
+	ret = q6v5_rmb_mba_wait(qproc, 0, 5000);
+	if (ret == -ETIMEDOUT) {
+		dev_err(qproc->dev, "MBA boot timed out\n");
+		goto halt_axi_ports;
+	} else if (ret != RMB_MBA_XPU_UNLOCKED &&
+		   ret != RMB_MBA_XPU_UNLOCKED_SCRIBBLED) {
+		dev_err(qproc->dev, "MBA returned unexpected status %d\n", ret);
+		ret = -EINVAL;
+		goto halt_axi_ports;
+	}
+
+	dev_info(qproc->dev, "MBA booted, loading mpss\n");
+
+	ret = q6v5_mpss_load(qproc);
+	if (ret)
+		goto reclaim_mpss;
+
+	ret = qcom_q6v5_wait_for_start(&qproc->q6v5, msecs_to_jiffies(5000));
+	if (ret == -ETIMEDOUT) {
+		dev_err(qproc->dev, "start timed out\n");
+		goto reclaim_mpss;
+	}
+
+	xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
+						qproc->mba_phys,
+						qproc->mba_size);
+	if (xfermemop_ret)
+		dev_err(qproc->dev,
+			"Failed to reclaim mba buffer system may become unstable\n");
+	qproc->running = true;
+
+	return 0;
+
+reclaim_mpss:
+	xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm,
+						false, qproc->mpss_phys,
+						qproc->mpss_size);
+	WARN_ON(xfermemop_ret);
+
+halt_axi_ports:
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
+
+reclaim_mba:
+	xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, false,
+						qproc->mba_phys,
+						qproc->mba_size);
+	if (xfermemop_ret) {
+		dev_err(qproc->dev,
+			"Failed to reclaim mba buffer, system may become unstable\n");
+	}
+
+disable_active_clks:
+	q6v5_clk_disable(qproc->dev, qproc->active_clks,
+			 qproc->active_clk_count);
+
+assert_reset:
+	q6v5_reset_assert(qproc);
+disable_reset_clks:
+	q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+			 qproc->reset_clk_count);
+disable_vdd:
+	q6v5_regulator_disable(qproc, qproc->active_regs,
+			       qproc->active_reg_count);
+disable_proxy_clk:
+	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+			 qproc->proxy_clk_count);
+disable_proxy_reg:
+	q6v5_regulator_disable(qproc, qproc->proxy_regs,
+			       qproc->proxy_reg_count);
+
+disable_irqs:
+	qcom_q6v5_unprepare(&qproc->q6v5);
+
+	return ret;
+}
+
+static int q6v5_stop(struct rproc *rproc)
+{
+	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
+	int ret;
+	u32 val;
+
+	qproc->running = false;
+
+	ret = qcom_q6v5_request_stop(&qproc->q6v5);
+	if (ret == -ETIMEDOUT)
+		dev_err(qproc->dev, "timed out on wait\n");
+
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
+	q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
+	if (qproc->version == MSS_MSM8996) {
+		/*
+		 * To avoid high MX current during LPASS/MSS restart.
+		 */
+		val = readl(qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+		val |= Q6SS_CLAMP_IO | QDSP6v56_CLAMP_WL |
+			QDSP6v56_CLAMP_QMC_MEM;
+		writel(val, qproc->reg_base + QDSP6SS_PWR_CTL_REG);
+	}
+
+
+	ret = q6v5_xfer_mem_ownership(qproc, &qproc->mpss_perm, false,
+				      qproc->mpss_phys, qproc->mpss_size);
+	WARN_ON(ret);
+
+	q6v5_reset_assert(qproc);
+
+	ret = qcom_q6v5_unprepare(&qproc->q6v5);
+	if (ret) {
+		q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+				 qproc->proxy_clk_count);
+		q6v5_regulator_disable(qproc, qproc->proxy_regs,
+				       qproc->proxy_reg_count);
+	}
+
+	q6v5_clk_disable(qproc->dev, qproc->reset_clks,
+			 qproc->reset_clk_count);
+	q6v5_clk_disable(qproc->dev, qproc->active_clks,
+			 qproc->active_clk_count);
+	q6v5_regulator_disable(qproc, qproc->active_regs,
+			       qproc->active_reg_count);
+
+	return 0;
+}
+
+static void *q6v5_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct q6v5 *qproc = rproc->priv;
+	int offset;
+
+	offset = da - qproc->mpss_reloc;
+	if (offset < 0 || offset + len > qproc->mpss_size)
+		return NULL;
+
+	return qproc->mpss_region + offset;
+}
+
+static const struct rproc_ops q6v5_ops = {
+	.start = q6v5_start,
+	.stop = q6v5_stop,
+	.da_to_va = q6v5_da_to_va,
+	.load = q6v5_load,
+};
+
+static void qcom_msa_handover(struct qcom_q6v5 *q6v5)
+{
+	struct q6v5 *qproc = container_of(q6v5, struct q6v5, q6v5);
+
+	q6v5_clk_disable(qproc->dev, qproc->proxy_clks,
+			 qproc->proxy_clk_count);
+	q6v5_regulator_disable(qproc, qproc->proxy_regs,
+			       qproc->proxy_reg_count);
+}
+
+static int q6v5_init_mem(struct q6v5 *qproc, struct platform_device *pdev)
+{
+	struct of_phandle_args args;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
+	qproc->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(qproc->reg_base))
+		return PTR_ERR(qproc->reg_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
+	qproc->rmb_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(qproc->rmb_base))
+		return PTR_ERR(qproc->rmb_base);
+
+	ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+					       "qcom,halt-regs", 3, 0, &args);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
+		return -EINVAL;
+	}
+
+	qproc->halt_map = syscon_node_to_regmap(args.np);
+	of_node_put(args.np);
+	if (IS_ERR(qproc->halt_map))
+		return PTR_ERR(qproc->halt_map);
+
+	qproc->halt_q6 = args.args[0];
+	qproc->halt_modem = args.args[1];
+	qproc->halt_nc = args.args[2];
+
+	return 0;
+}
+
+static int q6v5_init_clocks(struct device *dev, struct clk **clks,
+		char **clk_names)
+{
+	int i;
+
+	if (!clk_names)
+		return 0;
+
+	for (i = 0; clk_names[i]; i++) {
+		clks[i] = devm_clk_get(dev, clk_names[i]);
+		if (IS_ERR(clks[i])) {
+			int rc = PTR_ERR(clks[i]);
+
+			if (rc != -EPROBE_DEFER)
+				dev_err(dev, "Failed to get %s clock\n",
+					clk_names[i]);
+			return rc;
+		}
+	}
+
+	return i;
+}
+
+static int q6v5_init_reset(struct q6v5 *qproc)
+{
+	qproc->mss_restart = devm_reset_control_get_exclusive(qproc->dev,
+							      NULL);
+	if (IS_ERR(qproc->mss_restart)) {
+		dev_err(qproc->dev, "failed to acquire mss restart\n");
+		return PTR_ERR(qproc->mss_restart);
+	}
+
+	return 0;
+}
+
+static int q6v5_alloc_memory_region(struct q6v5 *qproc)
+{
+	struct device_node *child;
+	struct device_node *node;
+	struct resource r;
+	int ret;
+
+	child = of_get_child_by_name(qproc->dev->of_node, "mba");
+	node = of_parse_phandle(child, "memory-region", 0);
+	ret = of_address_to_resource(node, 0, &r);
+	if (ret) {
+		dev_err(qproc->dev, "unable to resolve mba region\n");
+		return ret;
+	}
+	of_node_put(node);
+
+	qproc->mba_phys = r.start;
+	qproc->mba_size = resource_size(&r);
+	qproc->mba_region = devm_ioremap_wc(qproc->dev, qproc->mba_phys, qproc->mba_size);
+	if (!qproc->mba_region) {
+		dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n",
+			&r.start, qproc->mba_size);
+		return -EBUSY;
+	}
+
+	child = of_get_child_by_name(qproc->dev->of_node, "mpss");
+	node = of_parse_phandle(child, "memory-region", 0);
+	ret = of_address_to_resource(node, 0, &r);
+	if (ret) {
+		dev_err(qproc->dev, "unable to resolve mpss region\n");
+		return ret;
+	}
+	of_node_put(node);
+
+	qproc->mpss_phys = qproc->mpss_reloc = r.start;
+	qproc->mpss_size = resource_size(&r);
+	qproc->mpss_region = devm_ioremap_wc(qproc->dev, qproc->mpss_phys, qproc->mpss_size);
+	if (!qproc->mpss_region) {
+		dev_err(qproc->dev, "unable to map memory region: %pa+%zx\n",
+			&r.start, qproc->mpss_size);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int q6v5_probe(struct platform_device *pdev)
+{
+	const struct rproc_hexagon_res *desc;
+	struct q6v5 *qproc;
+	struct rproc *rproc;
+	int ret;
+
+	desc = of_device_get_match_data(&pdev->dev);
+	if (!desc)
+		return -EINVAL;
+
+	if (desc->need_mem_protection && !qcom_scm_is_available())
+		return -EPROBE_DEFER;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_ops,
+			    desc->hexagon_mba_image, sizeof(*qproc));
+	if (!rproc) {
+		dev_err(&pdev->dev, "failed to allocate rproc\n");
+		return -ENOMEM;
+	}
+
+	qproc = (struct q6v5 *)rproc->priv;
+	qproc->dev = &pdev->dev;
+	qproc->rproc = rproc;
+	platform_set_drvdata(pdev, qproc);
+
+	ret = q6v5_init_mem(qproc, pdev);
+	if (ret)
+		goto free_rproc;
+
+	ret = q6v5_alloc_memory_region(qproc);
+	if (ret)
+		goto free_rproc;
+
+	ret = q6v5_init_clocks(&pdev->dev, qproc->proxy_clks,
+			       desc->proxy_clk_names);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get proxy clocks.\n");
+		goto free_rproc;
+	}
+	qproc->proxy_clk_count = ret;
+
+	ret = q6v5_init_clocks(&pdev->dev, qproc->reset_clks,
+			       desc->reset_clk_names);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get reset clocks.\n");
+		goto free_rproc;
+	}
+	qproc->reset_clk_count = ret;
+
+	ret = q6v5_init_clocks(&pdev->dev, qproc->active_clks,
+			       desc->active_clk_names);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get active clocks.\n");
+		goto free_rproc;
+	}
+	qproc->active_clk_count = ret;
+
+	ret = q6v5_regulator_init(&pdev->dev, qproc->proxy_regs,
+				  desc->proxy_supply);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get proxy regulators.\n");
+		goto free_rproc;
+	}
+	qproc->proxy_reg_count = ret;
+
+	ret = q6v5_regulator_init(&pdev->dev,  qproc->active_regs,
+				  desc->active_supply);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "Failed to get active regulators.\n");
+		goto free_rproc;
+	}
+	qproc->active_reg_count = ret;
+
+	ret = q6v5_init_reset(qproc);
+	if (ret)
+		goto free_rproc;
+
+	qproc->version = desc->version;
+	qproc->has_alt_reset = desc->has_alt_reset;
+	qproc->need_mem_protection = desc->need_mem_protection;
+
+	ret = qcom_q6v5_init(&qproc->q6v5, pdev, rproc, MPSS_CRASH_REASON_SMEM,
+			     qcom_msa_handover);
+	if (ret)
+		goto free_rproc;
+
+	qproc->mpss_perm = BIT(QCOM_SCM_VMID_HLOS);
+	qproc->mba_perm = BIT(QCOM_SCM_VMID_HLOS);
+	qcom_add_glink_subdev(rproc, &qproc->glink_subdev);
+	qcom_add_smd_subdev(rproc, &qproc->smd_subdev);
+	qcom_add_ssr_subdev(rproc, &qproc->ssr_subdev, "mpss");
+	qproc->sysmon = qcom_add_sysmon_subdev(rproc, "modem", 0x12);
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_rproc;
+
+	return 0;
+
+free_rproc:
+	rproc_free(rproc);
+
+	return ret;
+}
+
+static int q6v5_remove(struct platform_device *pdev)
+{
+	struct q6v5 *qproc = platform_get_drvdata(pdev);
+
+	rproc_del(qproc->rproc);
+
+	qcom_remove_sysmon_subdev(qproc->sysmon);
+	qcom_remove_glink_subdev(qproc->rproc, &qproc->glink_subdev);
+	qcom_remove_smd_subdev(qproc->rproc, &qproc->smd_subdev);
+	qcom_remove_ssr_subdev(qproc->rproc, &qproc->ssr_subdev);
+	rproc_free(qproc->rproc);
+
+	return 0;
+}
+
+static const struct rproc_hexagon_res sdm845_mss = {
+	.hexagon_mba_image = "mba.mbn",
+	.proxy_clk_names = (char*[]){
+			"xo",
+			"prng",
+			NULL
+	},
+	.reset_clk_names = (char*[]){
+			"iface",
+			"snoc_axi",
+			NULL
+	},
+	.active_clk_names = (char*[]){
+			"bus",
+			"mem",
+			"gpll0_mss",
+			"mnoc_axi",
+			NULL
+	},
+	.need_mem_protection = true,
+	.has_alt_reset = true,
+	.version = MSS_SDM845,
+};
+
+static const struct rproc_hexagon_res msm8996_mss = {
+	.hexagon_mba_image = "mba.mbn",
+	.proxy_supply = (struct qcom_mss_reg_res[]) {
+		{
+			.supply = "pll",
+			.uA = 100000,
+		},
+		{}
+	},
+	.proxy_clk_names = (char*[]){
+			"xo",
+			"pnoc",
+			"qdss",
+			NULL
+	},
+	.active_clk_names = (char*[]){
+			"iface",
+			"bus",
+			"mem",
+			"gpll0_mss",
+			"snoc_axi",
+			"mnoc_axi",
+			NULL
+	},
+	.need_mem_protection = true,
+	.has_alt_reset = false,
+	.version = MSS_MSM8996,
+};
+
+static const struct rproc_hexagon_res msm8916_mss = {
+	.hexagon_mba_image = "mba.mbn",
+	.proxy_supply = (struct qcom_mss_reg_res[]) {
+		{
+			.supply = "mx",
+			.uV = 1050000,
+		},
+		{
+			.supply = "cx",
+			.uA = 100000,
+		},
+		{
+			.supply = "pll",
+			.uA = 100000,
+		},
+		{}
+	},
+	.proxy_clk_names = (char*[]){
+		"xo",
+		NULL
+	},
+	.active_clk_names = (char*[]){
+		"iface",
+		"bus",
+		"mem",
+		NULL
+	},
+	.need_mem_protection = false,
+	.has_alt_reset = false,
+	.version = MSS_MSM8916,
+};
+
+static const struct rproc_hexagon_res msm8974_mss = {
+	.hexagon_mba_image = "mba.b00",
+	.proxy_supply = (struct qcom_mss_reg_res[]) {
+		{
+			.supply = "mx",
+			.uV = 1050000,
+		},
+		{
+			.supply = "cx",
+			.uA = 100000,
+		},
+		{
+			.supply = "pll",
+			.uA = 100000,
+		},
+		{}
+	},
+	.active_supply = (struct qcom_mss_reg_res[]) {
+		{
+			.supply = "mss",
+			.uV = 1050000,
+			.uA = 100000,
+		},
+		{}
+	},
+	.proxy_clk_names = (char*[]){
+		"xo",
+		NULL
+	},
+	.active_clk_names = (char*[]){
+		"iface",
+		"bus",
+		"mem",
+		NULL
+	},
+	.need_mem_protection = false,
+	.has_alt_reset = false,
+	.version = MSS_MSM8974,
+};
+
+static const struct of_device_id q6v5_of_match[] = {
+	{ .compatible = "qcom,q6v5-pil", .data = &msm8916_mss},
+	{ .compatible = "qcom,msm8916-mss-pil", .data = &msm8916_mss},
+	{ .compatible = "qcom,msm8974-mss-pil", .data = &msm8974_mss},
+	{ .compatible = "qcom,msm8996-mss-pil", .data = &msm8996_mss},
+	{ .compatible = "qcom,sdm845-mss-pil", .data = &sdm845_mss},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, q6v5_of_match);
+
+static struct platform_driver q6v5_driver = {
+	.probe = q6v5_probe,
+	.remove = q6v5_remove,
+	.driver = {
+		.name = "qcom-q6v5-pil",
+		.of_match_table = q6v5_of_match,
+	},
+};
+module_platform_driver(q6v5_driver);
+
+MODULE_DESCRIPTION("Peripheral Image Loader for Hexagon");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_q6v5_wcss.c b/drivers/remoteproc/qcom_q6v5_wcss.c
new file mode 100644
index 000000000..f93e1e4a1
--- /dev/null
+++ b/drivers/remoteproc/qcom_q6v5_wcss.c
@@ -0,0 +1,601 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2016-2018 Linaro Ltd.
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+ */
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include "qcom_common.h"
+#include "qcom_q6v5.h"
+
+#define WCSS_CRASH_REASON		421
+
+/* Q6SS Register Offsets */
+#define Q6SS_RESET_REG		0x014
+#define Q6SS_GFMUX_CTL_REG		0x020
+#define Q6SS_PWR_CTL_REG		0x030
+#define Q6SS_MEM_PWR_CTL		0x0B0
+
+/* AXI Halt Register Offsets */
+#define AXI_HALTREQ_REG			0x0
+#define AXI_HALTACK_REG			0x4
+#define AXI_IDLE_REG			0x8
+
+#define HALT_ACK_TIMEOUT_MS		100
+
+/* Q6SS_RESET */
+#define Q6SS_STOP_CORE			BIT(0)
+#define Q6SS_CORE_ARES			BIT(1)
+#define Q6SS_BUS_ARES_ENABLE		BIT(2)
+
+/* Q6SS_GFMUX_CTL */
+#define Q6SS_CLK_ENABLE			BIT(1)
+
+/* Q6SS_PWR_CTL */
+#define Q6SS_L2DATA_STBY_N		BIT(18)
+#define Q6SS_SLP_RET_N			BIT(19)
+#define Q6SS_CLAMP_IO			BIT(20)
+#define QDSS_BHS_ON			BIT(21)
+
+/* Q6SS parameters */
+#define Q6SS_LDO_BYP		BIT(25)
+#define Q6SS_BHS_ON		BIT(24)
+#define Q6SS_CLAMP_WL		BIT(21)
+#define Q6SS_CLAMP_QMC_MEM		BIT(22)
+#define HALT_CHECK_MAX_LOOPS		200
+#define Q6SS_XO_CBCR		GENMASK(5, 3)
+
+/* Q6SS config/status registers */
+#define TCSR_GLOBAL_CFG0	0x0
+#define TCSR_GLOBAL_CFG1	0x4
+#define SSCAON_CONFIG		0x8
+#define SSCAON_STATUS		0xc
+#define Q6SS_BHS_STATUS		0x78
+#define Q6SS_RST_EVB		0x10
+
+#define BHS_EN_REST_ACK		BIT(0)
+#define SSCAON_ENABLE		BIT(13)
+#define SSCAON_BUS_EN		BIT(15)
+#define SSCAON_BUS_MUX_MASK	GENMASK(18, 16)
+
+#define MEM_BANKS		19
+#define TCSR_WCSS_CLK_MASK	0x1F
+#define TCSR_WCSS_CLK_ENABLE	0x14
+
+struct q6v5_wcss {
+	struct device *dev;
+
+	void __iomem *reg_base;
+	void __iomem *rmb_base;
+
+	struct regmap *halt_map;
+	u32 halt_q6;
+	u32 halt_wcss;
+	u32 halt_nc;
+
+	struct reset_control *wcss_aon_reset;
+	struct reset_control *wcss_reset;
+	struct reset_control *wcss_q6_reset;
+
+	struct qcom_q6v5 q6v5;
+
+	phys_addr_t mem_phys;
+	phys_addr_t mem_reloc;
+	void *mem_region;
+	size_t mem_size;
+};
+
+static int q6v5_wcss_reset(struct q6v5_wcss *wcss)
+{
+	int ret;
+	u32 val;
+	int i;
+
+	/* Assert resets, stop core */
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val |= Q6SS_CORE_ARES | Q6SS_BUS_ARES_ENABLE | Q6SS_STOP_CORE;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	/* BHS require xo cbcr to be enabled */
+	val = readl(wcss->reg_base + Q6SS_XO_CBCR);
+	val |= 0x1;
+	writel(val, wcss->reg_base + Q6SS_XO_CBCR);
+
+	/* Read CLKOFF bit to go low indicating CLK is enabled */
+	ret = readl_poll_timeout(wcss->reg_base + Q6SS_XO_CBCR,
+				 val, !(val & BIT(31)), 1,
+				 HALT_CHECK_MAX_LOOPS);
+	if (ret) {
+		dev_err(wcss->dev,
+			"xo cbcr enabling timed out (rc:%d)\n", ret);
+		return ret;
+	}
+	/* Enable power block headswitch and wait for it to stabilize */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val |= Q6SS_BHS_ON;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+	udelay(1);
+
+	/* Put LDO in bypass mode */
+	val |= Q6SS_LDO_BYP;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Deassert Q6 compiler memory clamp */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val &= ~Q6SS_CLAMP_QMC_MEM;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Deassert memory peripheral sleep and L2 memory standby */
+	val |= Q6SS_L2DATA_STBY_N | Q6SS_SLP_RET_N;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Turn on L1, L2, ETB and JU memories 1 at a time */
+	val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
+	for (i = MEM_BANKS; i >= 0; i--) {
+		val |= BIT(i);
+		writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
+		/*
+		 * Read back value to ensure the write is done then
+		 * wait for 1us for both memory peripheral and data
+		 * array to turn on.
+		 */
+		val |= readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
+		udelay(1);
+	}
+	/* Remove word line clamp */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val &= ~Q6SS_CLAMP_WL;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Remove IO clamp */
+	val &= ~Q6SS_CLAMP_IO;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* Bring core out of reset */
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val &= ~Q6SS_CORE_ARES;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	/* Turn on core clock */
+	val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	val |= Q6SS_CLK_ENABLE;
+	writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+
+	/* Start core execution */
+	val = readl(wcss->reg_base + Q6SS_RESET_REG);
+	val &= ~Q6SS_STOP_CORE;
+	writel(val, wcss->reg_base + Q6SS_RESET_REG);
+
+	return 0;
+}
+
+static int q6v5_wcss_start(struct rproc *rproc)
+{
+	struct q6v5_wcss *wcss = rproc->priv;
+	int ret;
+
+	qcom_q6v5_prepare(&wcss->q6v5);
+
+	/* Release Q6 and WCSS reset */
+	ret = reset_control_deassert(wcss->wcss_reset);
+	if (ret) {
+		dev_err(wcss->dev, "wcss_reset failed\n");
+		return ret;
+	}
+
+	ret = reset_control_deassert(wcss->wcss_q6_reset);
+	if (ret) {
+		dev_err(wcss->dev, "wcss_q6_reset failed\n");
+		goto wcss_reset;
+	}
+
+	/* Lithium configuration - clock gating and bus arbitration */
+	ret = regmap_update_bits(wcss->halt_map,
+				 wcss->halt_nc + TCSR_GLOBAL_CFG0,
+				 TCSR_WCSS_CLK_MASK,
+				 TCSR_WCSS_CLK_ENABLE);
+	if (ret)
+		goto wcss_q6_reset;
+
+	ret = regmap_update_bits(wcss->halt_map,
+				 wcss->halt_nc + TCSR_GLOBAL_CFG1,
+				 1, 0);
+	if (ret)
+		goto wcss_q6_reset;
+
+	/* Write bootaddr to EVB so that Q6WCSS will jump there after reset */
+	writel(rproc->bootaddr >> 4, wcss->reg_base + Q6SS_RST_EVB);
+
+	ret = q6v5_wcss_reset(wcss);
+	if (ret)
+		goto wcss_q6_reset;
+
+	ret = qcom_q6v5_wait_for_start(&wcss->q6v5, 5 * HZ);
+	if (ret == -ETIMEDOUT)
+		dev_err(wcss->dev, "start timed out\n");
+
+	return ret;
+
+wcss_q6_reset:
+	reset_control_assert(wcss->wcss_q6_reset);
+
+wcss_reset:
+	reset_control_assert(wcss->wcss_reset);
+
+	return ret;
+}
+
+static void q6v5_wcss_halt_axi_port(struct q6v5_wcss *wcss,
+				    struct regmap *halt_map,
+				    u32 offset)
+{
+	unsigned long timeout;
+	unsigned int val;
+	int ret;
+
+	/* Check if we're already idle */
+	ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
+	if (!ret && val)
+		return;
+
+	/* Assert halt request */
+	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 1);
+
+	/* Wait for halt */
+	timeout = jiffies + msecs_to_jiffies(HALT_ACK_TIMEOUT_MS);
+	for (;;) {
+		ret = regmap_read(halt_map, offset + AXI_HALTACK_REG, &val);
+		if (ret || val || time_after(jiffies, timeout))
+			break;
+
+		msleep(1);
+	}
+
+	ret = regmap_read(halt_map, offset + AXI_IDLE_REG, &val);
+	if (ret || !val)
+		dev_err(wcss->dev, "port failed halt\n");
+
+	/* Clear halt request (port will remain halted until reset) */
+	regmap_write(halt_map, offset + AXI_HALTREQ_REG, 0);
+}
+
+static int q6v5_wcss_powerdown(struct q6v5_wcss *wcss)
+{
+	int ret;
+	u32 val;
+
+	/* 1 - Assert WCSS/Q6 HALTREQ */
+	q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_wcss);
+
+	/* 2 - Enable WCSSAON_CONFIG */
+	val = readl(wcss->rmb_base + SSCAON_CONFIG);
+	val |= SSCAON_ENABLE;
+	writel(val, wcss->rmb_base + SSCAON_CONFIG);
+
+	/* 3 - Set SSCAON_CONFIG */
+	val |= SSCAON_BUS_EN;
+	val &= ~SSCAON_BUS_MUX_MASK;
+	writel(val, wcss->rmb_base + SSCAON_CONFIG);
+
+	/* 4 - SSCAON_CONFIG 1 */
+	val |= BIT(1);
+	writel(val, wcss->rmb_base + SSCAON_CONFIG);
+
+	/* 5 - wait for SSCAON_STATUS */
+	ret = readl_poll_timeout(wcss->rmb_base + SSCAON_STATUS,
+				 val, (val & 0xffff) == 0x400, 1000,
+				 HALT_CHECK_MAX_LOOPS);
+	if (ret) {
+		dev_err(wcss->dev,
+			"can't get SSCAON_STATUS rc:%d)\n", ret);
+		return ret;
+	}
+
+	/* 6 - De-assert WCSS_AON reset */
+	reset_control_assert(wcss->wcss_aon_reset);
+
+	/* 7 - Disable WCSSAON_CONFIG 13 */
+	val = readl(wcss->rmb_base + SSCAON_CONFIG);
+	val &= ~SSCAON_ENABLE;
+	writel(val, wcss->rmb_base + SSCAON_CONFIG);
+
+	/* 8 - De-assert WCSS/Q6 HALTREQ */
+	reset_control_assert(wcss->wcss_reset);
+
+	return 0;
+}
+
+static int q6v5_q6_powerdown(struct q6v5_wcss *wcss)
+{
+	int ret;
+	u32 val;
+	int i;
+
+	/* 1 - Halt Q6 bus interface */
+	q6v5_wcss_halt_axi_port(wcss, wcss->halt_map, wcss->halt_q6);
+
+	/* 2 - Disable Q6 Core clock */
+	val = readl(wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+	val &= ~Q6SS_CLK_ENABLE;
+	writel(val, wcss->reg_base + Q6SS_GFMUX_CTL_REG);
+
+	/* 3 - Clamp I/O */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val |= Q6SS_CLAMP_IO;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* 4 - Clamp WL */
+	val |= QDSS_BHS_ON;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* 5 - Clear Erase standby */
+	val &= ~Q6SS_L2DATA_STBY_N;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* 6 - Clear Sleep RTN */
+	val &= ~Q6SS_SLP_RET_N;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* 7 - turn off Q6 memory foot/head switch one bank at a time */
+	for (i = 0; i < 20; i++) {
+		val = readl(wcss->reg_base + Q6SS_MEM_PWR_CTL);
+		val &= ~BIT(i);
+		writel(val, wcss->reg_base + Q6SS_MEM_PWR_CTL);
+		mdelay(1);
+	}
+
+	/* 8 - Assert QMC memory RTN */
+	val = readl(wcss->reg_base + Q6SS_PWR_CTL_REG);
+	val |= Q6SS_CLAMP_QMC_MEM;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+
+	/* 9 - Turn off BHS */
+	val &= ~Q6SS_BHS_ON;
+	writel(val, wcss->reg_base + Q6SS_PWR_CTL_REG);
+	udelay(1);
+
+	/* 10 - Wait till BHS Reset is done */
+	ret = readl_poll_timeout(wcss->reg_base + Q6SS_BHS_STATUS,
+				 val, !(val & BHS_EN_REST_ACK), 1000,
+				 HALT_CHECK_MAX_LOOPS);
+	if (ret) {
+		dev_err(wcss->dev, "BHS_STATUS not OFF (rc:%d)\n", ret);
+		return ret;
+	}
+
+	/* 11 -  Assert WCSS reset */
+	reset_control_assert(wcss->wcss_reset);
+
+	/* 12 - Assert Q6 reset */
+	reset_control_assert(wcss->wcss_q6_reset);
+
+	return 0;
+}
+
+static int q6v5_wcss_stop(struct rproc *rproc)
+{
+	struct q6v5_wcss *wcss = rproc->priv;
+	int ret;
+
+	/* WCSS powerdown */
+	ret = qcom_q6v5_request_stop(&wcss->q6v5);
+	if (ret == -ETIMEDOUT) {
+		dev_err(wcss->dev, "timed out on wait\n");
+		return ret;
+	}
+
+	ret = q6v5_wcss_powerdown(wcss);
+	if (ret)
+		return ret;
+
+	/* Q6 Power down */
+	ret = q6v5_q6_powerdown(wcss);
+	if (ret)
+		return ret;
+
+	qcom_q6v5_unprepare(&wcss->q6v5);
+
+	return 0;
+}
+
+static void *q6v5_wcss_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct q6v5_wcss *wcss = rproc->priv;
+	int offset;
+
+	offset = da - wcss->mem_reloc;
+	if (offset < 0 || offset + len > wcss->mem_size)
+		return NULL;
+
+	return wcss->mem_region + offset;
+}
+
+static int q6v5_wcss_load(struct rproc *rproc, const struct firmware *fw)
+{
+	struct q6v5_wcss *wcss = rproc->priv;
+
+	return qcom_mdt_load_no_init(wcss->dev, fw, rproc->firmware,
+				     0, wcss->mem_region, wcss->mem_phys,
+				     wcss->mem_size, &wcss->mem_reloc);
+}
+
+static const struct rproc_ops q6v5_wcss_ops = {
+	.start = q6v5_wcss_start,
+	.stop = q6v5_wcss_stop,
+	.da_to_va = q6v5_wcss_da_to_va,
+	.load = q6v5_wcss_load,
+	.get_boot_addr = rproc_elf_get_boot_addr,
+};
+
+static int q6v5_wcss_init_reset(struct q6v5_wcss *wcss)
+{
+	struct device *dev = wcss->dev;
+
+	wcss->wcss_aon_reset = devm_reset_control_get(dev, "wcss_aon_reset");
+	if (IS_ERR(wcss->wcss_aon_reset)) {
+		dev_err(wcss->dev, "unable to acquire wcss_aon_reset\n");
+		return PTR_ERR(wcss->wcss_aon_reset);
+	}
+
+	wcss->wcss_reset = devm_reset_control_get(dev, "wcss_reset");
+	if (IS_ERR(wcss->wcss_reset)) {
+		dev_err(wcss->dev, "unable to acquire wcss_reset\n");
+		return PTR_ERR(wcss->wcss_reset);
+	}
+
+	wcss->wcss_q6_reset = devm_reset_control_get(dev, "wcss_q6_reset");
+	if (IS_ERR(wcss->wcss_q6_reset)) {
+		dev_err(wcss->dev, "unable to acquire wcss_q6_reset\n");
+		return PTR_ERR(wcss->wcss_q6_reset);
+	}
+
+	return 0;
+}
+
+static int q6v5_wcss_init_mmio(struct q6v5_wcss *wcss,
+			       struct platform_device *pdev)
+{
+	struct of_phandle_args args;
+	struct resource *res;
+	int ret;
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "qdsp6");
+	wcss->reg_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(wcss->reg_base))
+		return PTR_ERR(wcss->reg_base);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rmb");
+	wcss->rmb_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(wcss->rmb_base))
+		return PTR_ERR(wcss->rmb_base);
+
+	ret = of_parse_phandle_with_fixed_args(pdev->dev.of_node,
+					       "qcom,halt-regs", 3, 0, &args);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "failed to parse qcom,halt-regs\n");
+		return -EINVAL;
+	}
+
+	wcss->halt_map = syscon_node_to_regmap(args.np);
+	of_node_put(args.np);
+	if (IS_ERR(wcss->halt_map))
+		return PTR_ERR(wcss->halt_map);
+
+	wcss->halt_q6 = args.args[0];
+	wcss->halt_wcss = args.args[1];
+	wcss->halt_nc = args.args[2];
+
+	return 0;
+}
+
+static int q6v5_alloc_memory_region(struct q6v5_wcss *wcss)
+{
+	struct reserved_mem *rmem = NULL;
+	struct device_node *node;
+	struct device *dev = wcss->dev;
+
+	node = of_parse_phandle(dev->of_node, "memory-region", 0);
+	if (node)
+		rmem = of_reserved_mem_lookup(node);
+	of_node_put(node);
+
+	if (!rmem) {
+		dev_err(dev, "unable to acquire memory-region\n");
+		return -EINVAL;
+	}
+
+	wcss->mem_phys = rmem->base;
+	wcss->mem_reloc = rmem->base;
+	wcss->mem_size = rmem->size;
+	wcss->mem_region = devm_ioremap_wc(dev, wcss->mem_phys, wcss->mem_size);
+	if (!wcss->mem_region) {
+		dev_err(dev, "unable to map memory region: %pa+%pa\n",
+			&rmem->base, &rmem->size);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int q6v5_wcss_probe(struct platform_device *pdev)
+{
+	struct q6v5_wcss *wcss;
+	struct rproc *rproc;
+	int ret;
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &q6v5_wcss_ops,
+			    "IPQ8074/q6_fw.mdt", sizeof(*wcss));
+	if (!rproc) {
+		dev_err(&pdev->dev, "failed to allocate rproc\n");
+		return -ENOMEM;
+	}
+
+	wcss = rproc->priv;
+	wcss->dev = &pdev->dev;
+
+	ret = q6v5_wcss_init_mmio(wcss, pdev);
+	if (ret)
+		goto free_rproc;
+
+	ret = q6v5_alloc_memory_region(wcss);
+	if (ret)
+		goto free_rproc;
+
+	ret = q6v5_wcss_init_reset(wcss);
+	if (ret)
+		goto free_rproc;
+
+	ret = qcom_q6v5_init(&wcss->q6v5, pdev, rproc, WCSS_CRASH_REASON, NULL);
+	if (ret)
+		goto free_rproc;
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_rproc;
+
+	platform_set_drvdata(pdev, rproc);
+
+	return 0;
+
+free_rproc:
+	rproc_free(rproc);
+
+	return ret;
+}
+
+static int q6v5_wcss_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+
+	rproc_del(rproc);
+	rproc_free(rproc);
+
+	return 0;
+}
+
+static const struct of_device_id q6v5_wcss_of_match[] = {
+	{ .compatible = "qcom,ipq8074-wcss-pil" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, q6v5_wcss_of_match);
+
+static struct platform_driver q6v5_wcss_driver = {
+	.probe = q6v5_wcss_probe,
+	.remove = q6v5_wcss_remove,
+	.driver = {
+		.name = "qcom-q6v5-wcss-pil",
+		.of_match_table = q6v5_wcss_of_match,
+	},
+};
+module_platform_driver(q6v5_wcss_driver);
+
+MODULE_DESCRIPTION("Hexagon WCSS Peripheral Image Loader");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_sysmon.c b/drivers/remoteproc/qcom_sysmon.c
new file mode 100644
index 000000000..e976a602b
--- /dev/null
+++ b/drivers/remoteproc/qcom_sysmon.c
@@ -0,0 +1,582 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2017, Linaro Ltd.
+ */
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc/qcom_rproc.h>
+#include <linux/rpmsg.h>
+
+#include "qcom_common.h"
+
+static BLOCKING_NOTIFIER_HEAD(sysmon_notifiers);
+
+struct qcom_sysmon {
+	struct rproc_subdev subdev;
+	struct rproc *rproc;
+
+	struct list_head node;
+
+	const char *name;
+
+	int ssctl_version;
+	int ssctl_instance;
+
+	struct notifier_block nb;
+
+	struct device *dev;
+
+	struct rpmsg_endpoint *ept;
+	struct completion comp;
+	struct mutex lock;
+
+	bool ssr_ack;
+
+	struct qmi_handle qmi;
+	struct sockaddr_qrtr ssctl;
+};
+
+static DEFINE_MUTEX(sysmon_lock);
+static LIST_HEAD(sysmon_list);
+
+/**
+ * sysmon_send_event() - send notification of other remote's SSR event
+ * @sysmon:	sysmon context
+ * @name:	other remote's name
+ */
+static void sysmon_send_event(struct qcom_sysmon *sysmon, const char *name)
+{
+	char req[50];
+	int len;
+	int ret;
+
+	len = snprintf(req, sizeof(req), "ssr:%s:before_shutdown", name);
+	if (len >= sizeof(req))
+		return;
+
+	mutex_lock(&sysmon->lock);
+	reinit_completion(&sysmon->comp);
+	sysmon->ssr_ack = false;
+
+	ret = rpmsg_send(sysmon->ept, req, len);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to send sysmon event\n");
+		goto out_unlock;
+	}
+
+	ret = wait_for_completion_timeout(&sysmon->comp,
+					  msecs_to_jiffies(5000));
+	if (!ret) {
+		dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
+		goto out_unlock;
+	}
+
+	if (!sysmon->ssr_ack)
+		dev_err(sysmon->dev, "unexpected response to sysmon event\n");
+
+out_unlock:
+	mutex_unlock(&sysmon->lock);
+}
+
+/**
+ * sysmon_request_shutdown() - request graceful shutdown of remote
+ * @sysmon:	sysmon context
+ */
+static void sysmon_request_shutdown(struct qcom_sysmon *sysmon)
+{
+	char *req = "ssr:shutdown";
+	int ret;
+
+	mutex_lock(&sysmon->lock);
+	reinit_completion(&sysmon->comp);
+	sysmon->ssr_ack = false;
+
+	ret = rpmsg_send(sysmon->ept, req, strlen(req) + 1);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "send sysmon shutdown request failed\n");
+		goto out_unlock;
+	}
+
+	ret = wait_for_completion_timeout(&sysmon->comp,
+					  msecs_to_jiffies(5000));
+	if (!ret) {
+		dev_err(sysmon->dev, "timeout waiting for sysmon ack\n");
+		goto out_unlock;
+	}
+
+	if (!sysmon->ssr_ack)
+		dev_err(sysmon->dev,
+			"unexpected response to sysmon shutdown request\n");
+
+out_unlock:
+	mutex_unlock(&sysmon->lock);
+}
+
+static int sysmon_callback(struct rpmsg_device *rpdev, void *data, int count,
+			   void *priv, u32 addr)
+{
+	struct qcom_sysmon *sysmon = priv;
+	const char *ssr_ack = "ssr:ack";
+	const int ssr_ack_len = strlen(ssr_ack) + 1;
+
+	if (!sysmon)
+		return -EINVAL;
+
+	if (count >= ssr_ack_len && !memcmp(data, ssr_ack, ssr_ack_len))
+		sysmon->ssr_ack = true;
+
+	complete(&sysmon->comp);
+
+	return 0;
+}
+
+#define SSCTL_SHUTDOWN_REQ		0x21
+#define SSCTL_SUBSYS_EVENT_REQ		0x23
+
+#define SSCTL_MAX_MSG_LEN		7
+
+#define SSCTL_SUBSYS_NAME_LENGTH	15
+
+enum {
+	SSCTL_SSR_EVENT_BEFORE_POWERUP,
+	SSCTL_SSR_EVENT_AFTER_POWERUP,
+	SSCTL_SSR_EVENT_BEFORE_SHUTDOWN,
+	SSCTL_SSR_EVENT_AFTER_SHUTDOWN,
+};
+
+enum {
+	SSCTL_SSR_EVENT_FORCED,
+	SSCTL_SSR_EVENT_GRACEFUL,
+};
+
+struct ssctl_shutdown_resp {
+	struct qmi_response_type_v01 resp;
+};
+
+static struct qmi_elem_info ssctl_shutdown_resp_ei[] = {
+	{
+		.data_type	= QMI_STRUCT,
+		.elem_len	= 1,
+		.elem_size	= sizeof(struct qmi_response_type_v01),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x02,
+		.offset		= offsetof(struct ssctl_shutdown_resp, resp),
+		.ei_array	= qmi_response_type_v01_ei,
+	},
+	{}
+};
+
+struct ssctl_subsys_event_req {
+	u8 subsys_name_len;
+	char subsys_name[SSCTL_SUBSYS_NAME_LENGTH];
+	u32 event;
+	u8 evt_driven_valid;
+	u32 evt_driven;
+};
+
+static struct qmi_elem_info ssctl_subsys_event_req_ei[] = {
+	{
+		.data_type	= QMI_DATA_LEN,
+		.elem_len	= 1,
+		.elem_size	= sizeof(uint8_t),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x01,
+		.offset		= offsetof(struct ssctl_subsys_event_req,
+					   subsys_name_len),
+		.ei_array	= NULL,
+	},
+	{
+		.data_type	= QMI_UNSIGNED_1_BYTE,
+		.elem_len	= SSCTL_SUBSYS_NAME_LENGTH,
+		.elem_size	= sizeof(char),
+		.array_type	= VAR_LEN_ARRAY,
+		.tlv_type	= 0x01,
+		.offset		= offsetof(struct ssctl_subsys_event_req,
+					   subsys_name),
+		.ei_array	= NULL,
+	},
+	{
+		.data_type	= QMI_SIGNED_4_BYTE_ENUM,
+		.elem_len	= 1,
+		.elem_size	= sizeof(uint32_t),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x02,
+		.offset		= offsetof(struct ssctl_subsys_event_req,
+					   event),
+		.ei_array	= NULL,
+	},
+	{
+		.data_type	= QMI_OPT_FLAG,
+		.elem_len	= 1,
+		.elem_size	= sizeof(uint8_t),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x10,
+		.offset		= offsetof(struct ssctl_subsys_event_req,
+					   evt_driven_valid),
+		.ei_array	= NULL,
+	},
+	{
+		.data_type	= QMI_SIGNED_4_BYTE_ENUM,
+		.elem_len	= 1,
+		.elem_size	= sizeof(uint32_t),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x10,
+		.offset		= offsetof(struct ssctl_subsys_event_req,
+					   evt_driven),
+		.ei_array	= NULL,
+	},
+	{}
+};
+
+struct ssctl_subsys_event_resp {
+	struct qmi_response_type_v01 resp;
+};
+
+static struct qmi_elem_info ssctl_subsys_event_resp_ei[] = {
+	{
+		.data_type	= QMI_STRUCT,
+		.elem_len	= 1,
+		.elem_size	= sizeof(struct qmi_response_type_v01),
+		.array_type	= NO_ARRAY,
+		.tlv_type	= 0x02,
+		.offset		= offsetof(struct ssctl_subsys_event_resp,
+					   resp),
+		.ei_array	= qmi_response_type_v01_ei,
+	},
+	{}
+};
+
+/**
+ * ssctl_request_shutdown() - request shutdown via SSCTL QMI service
+ * @sysmon:	sysmon context
+ */
+static void ssctl_request_shutdown(struct qcom_sysmon *sysmon)
+{
+	struct ssctl_shutdown_resp resp;
+	struct qmi_txn txn;
+	int ret;
+
+	ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_shutdown_resp_ei, &resp);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to allocate QMI txn\n");
+		return;
+	}
+
+	ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
+			       SSCTL_SHUTDOWN_REQ, 0, NULL, NULL);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to send shutdown request\n");
+		qmi_txn_cancel(&txn);
+		return;
+	}
+
+	ret = qmi_txn_wait(&txn, 5 * HZ);
+	if (ret < 0)
+		dev_err(sysmon->dev, "failed receiving QMI response\n");
+	else if (resp.resp.result)
+		dev_err(sysmon->dev, "shutdown request failed\n");
+	else
+		dev_dbg(sysmon->dev, "shutdown request completed\n");
+}
+
+/**
+ * ssctl_send_event() - send notification of other remote's SSR event
+ * @sysmon:	sysmon context
+ * @name:	other remote's name
+ */
+static void ssctl_send_event(struct qcom_sysmon *sysmon, const char *name)
+{
+	struct ssctl_subsys_event_resp resp;
+	struct ssctl_subsys_event_req req;
+	struct qmi_txn txn;
+	int ret;
+
+	memset(&resp, 0, sizeof(resp));
+	ret = qmi_txn_init(&sysmon->qmi, &txn, ssctl_subsys_event_resp_ei, &resp);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to allocate QMI txn\n");
+		return;
+	}
+
+	memset(&req, 0, sizeof(req));
+	strlcpy(req.subsys_name, name, sizeof(req.subsys_name));
+	req.subsys_name_len = strlen(req.subsys_name);
+	req.event = SSCTL_SSR_EVENT_BEFORE_SHUTDOWN;
+	req.evt_driven_valid = true;
+	req.evt_driven = SSCTL_SSR_EVENT_FORCED;
+
+	ret = qmi_send_request(&sysmon->qmi, &sysmon->ssctl, &txn,
+			       SSCTL_SUBSYS_EVENT_REQ, 40,
+			       ssctl_subsys_event_req_ei, &req);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to send shutdown request\n");
+		qmi_txn_cancel(&txn);
+		return;
+	}
+
+	ret = qmi_txn_wait(&txn, 5 * HZ);
+	if (ret < 0)
+		dev_err(sysmon->dev, "failed receiving QMI response\n");
+	else if (resp.resp.result)
+		dev_err(sysmon->dev, "ssr event send failed\n");
+	else
+		dev_dbg(sysmon->dev, "ssr event send completed\n");
+}
+
+/**
+ * ssctl_new_server() - QMI callback indicating a new service
+ * @qmi:	QMI handle
+ * @svc:	service information
+ *
+ * Return: 0 if we're interested in this service, -EINVAL otherwise.
+ */
+static int ssctl_new_server(struct qmi_handle *qmi, struct qmi_service *svc)
+{
+	struct qcom_sysmon *sysmon = container_of(qmi, struct qcom_sysmon, qmi);
+
+	switch (svc->version) {
+	case 1:
+		if (svc->instance != 0)
+			return -EINVAL;
+		if (strcmp(sysmon->name, "modem"))
+			return -EINVAL;
+		break;
+	case 2:
+		if (svc->instance != sysmon->ssctl_instance)
+			return -EINVAL;
+		break;
+	default:
+		return -EINVAL;
+	};
+
+	sysmon->ssctl_version = svc->version;
+
+	sysmon->ssctl.sq_family = AF_QIPCRTR;
+	sysmon->ssctl.sq_node = svc->node;
+	sysmon->ssctl.sq_port = svc->port;
+
+	svc->priv = sysmon;
+
+	return 0;
+}
+
+/**
+ * ssctl_del_server() - QMI callback indicating that @svc is removed
+ * @qmi:	QMI handle
+ * @svc:	service information
+ */
+static void ssctl_del_server(struct qmi_handle *qmi, struct qmi_service *svc)
+{
+	struct qcom_sysmon *sysmon = svc->priv;
+
+	sysmon->ssctl_version = 0;
+}
+
+static const struct qmi_ops ssctl_ops = {
+	.new_server = ssctl_new_server,
+	.del_server = ssctl_del_server,
+};
+
+static int sysmon_start(struct rproc_subdev *subdev)
+{
+	return 0;
+}
+
+static void sysmon_stop(struct rproc_subdev *subdev, bool crashed)
+{
+	struct qcom_sysmon *sysmon = container_of(subdev, struct qcom_sysmon, subdev);
+
+	blocking_notifier_call_chain(&sysmon_notifiers, 0, (void *)sysmon->name);
+
+	/* Don't request graceful shutdown if we've crashed */
+	if (crashed)
+		return;
+
+	if (sysmon->ssctl_version)
+		ssctl_request_shutdown(sysmon);
+	else if (sysmon->ept)
+		sysmon_request_shutdown(sysmon);
+}
+
+/**
+ * sysmon_notify() - notify sysmon target of another's SSR
+ * @nb:		notifier_block associated with sysmon instance
+ * @event:	unused
+ * @data:	SSR identifier of the remote that is going down
+ */
+static int sysmon_notify(struct notifier_block *nb, unsigned long event,
+			 void *data)
+{
+	struct qcom_sysmon *sysmon = container_of(nb, struct qcom_sysmon, nb);
+	struct rproc *rproc = sysmon->rproc;
+	const char *ssr_name = data;
+
+	/* Skip non-running rprocs and the originating instance */
+	if (rproc->state != RPROC_RUNNING || !strcmp(data, sysmon->name)) {
+		dev_dbg(sysmon->dev, "not notifying %s\n", sysmon->name);
+		return NOTIFY_DONE;
+	}
+
+	/* Only SSCTL version 2 supports SSR events */
+	if (sysmon->ssctl_version == 2)
+		ssctl_send_event(sysmon, ssr_name);
+	else if (sysmon->ept)
+		sysmon_send_event(sysmon, ssr_name);
+
+	return NOTIFY_DONE;
+}
+
+/**
+ * qcom_add_sysmon_subdev() - create a sysmon subdev for the given remoteproc
+ * @rproc:	rproc context to associate the subdev with
+ * @name:	name of this subdev, to use in SSR
+ * @ssctl_instance: instance id of the ssctl QMI service
+ *
+ * Return: A new qcom_sysmon object, or NULL on failure
+ */
+struct qcom_sysmon *qcom_add_sysmon_subdev(struct rproc *rproc,
+					   const char *name,
+					   int ssctl_instance)
+{
+	struct qcom_sysmon *sysmon;
+	int ret;
+
+	sysmon = kzalloc(sizeof(*sysmon), GFP_KERNEL);
+	if (!sysmon)
+		return NULL;
+
+	sysmon->dev = rproc->dev.parent;
+	sysmon->rproc = rproc;
+
+	sysmon->name = name;
+	sysmon->ssctl_instance = ssctl_instance;
+
+	init_completion(&sysmon->comp);
+	mutex_init(&sysmon->lock);
+
+	ret = qmi_handle_init(&sysmon->qmi, SSCTL_MAX_MSG_LEN, &ssctl_ops, NULL);
+	if (ret < 0) {
+		dev_err(sysmon->dev, "failed to initialize qmi handle\n");
+		kfree(sysmon);
+		return NULL;
+	}
+
+	qmi_add_lookup(&sysmon->qmi, 43, 0, 0);
+
+	sysmon->subdev.start = sysmon_start;
+	sysmon->subdev.stop = sysmon_stop;
+
+	rproc_add_subdev(rproc, &sysmon->subdev);
+
+	sysmon->nb.notifier_call = sysmon_notify;
+	blocking_notifier_chain_register(&sysmon_notifiers, &sysmon->nb);
+
+	mutex_lock(&sysmon_lock);
+	list_add(&sysmon->node, &sysmon_list);
+	mutex_unlock(&sysmon_lock);
+
+	return sysmon;
+}
+EXPORT_SYMBOL_GPL(qcom_add_sysmon_subdev);
+
+/**
+ * qcom_remove_sysmon_subdev() - release a qcom_sysmon
+ * @sysmon:	sysmon context, as retrieved by qcom_add_sysmon_subdev()
+ */
+void qcom_remove_sysmon_subdev(struct qcom_sysmon *sysmon)
+{
+	if (!sysmon)
+		return;
+
+	mutex_lock(&sysmon_lock);
+	list_del(&sysmon->node);
+	mutex_unlock(&sysmon_lock);
+
+	blocking_notifier_chain_unregister(&sysmon_notifiers, &sysmon->nb);
+
+	rproc_remove_subdev(sysmon->rproc, &sysmon->subdev);
+
+	qmi_handle_release(&sysmon->qmi);
+
+	kfree(sysmon);
+}
+EXPORT_SYMBOL_GPL(qcom_remove_sysmon_subdev);
+
+/**
+ * sysmon_probe() - probe sys_mon channel
+ * @rpdev:	rpmsg device handle
+ *
+ * Find the sysmon context associated with the ancestor remoteproc and assign
+ * this rpmsg device with said sysmon context.
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
+static int sysmon_probe(struct rpmsg_device *rpdev)
+{
+	struct qcom_sysmon *sysmon;
+	struct rproc *rproc;
+
+	rproc = rproc_get_by_child(&rpdev->dev);
+	if (!rproc) {
+		dev_err(&rpdev->dev, "sysmon device not child of rproc\n");
+		return -EINVAL;
+	}
+
+	mutex_lock(&sysmon_lock);
+	list_for_each_entry(sysmon, &sysmon_list, node) {
+		if (sysmon->rproc == rproc)
+			goto found;
+	}
+	mutex_unlock(&sysmon_lock);
+
+	dev_err(&rpdev->dev, "no sysmon associated with parent rproc\n");
+
+	return -EINVAL;
+
+found:
+	mutex_unlock(&sysmon_lock);
+
+	rpdev->ept->priv = sysmon;
+	sysmon->ept = rpdev->ept;
+
+	return 0;
+}
+
+/**
+ * sysmon_remove() - sys_mon channel remove handler
+ * @rpdev:	rpmsg device handle
+ *
+ * Disassociate the rpmsg device with the sysmon instance.
+ */
+static void sysmon_remove(struct rpmsg_device *rpdev)
+{
+	struct qcom_sysmon *sysmon = rpdev->ept->priv;
+
+	sysmon->ept = NULL;
+}
+
+static const struct rpmsg_device_id sysmon_match[] = {
+	{ "sys_mon" },
+	{}
+};
+
+static struct rpmsg_driver sysmon_driver = {
+	.probe = sysmon_probe,
+	.remove = sysmon_remove,
+	.callback = sysmon_callback,
+	.id_table = sysmon_match,
+	.drv = {
+		.name = "qcom_sysmon",
+	},
+};
+
+module_rpmsg_driver(sysmon_driver);
+
+MODULE_DESCRIPTION("Qualcomm sysmon driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_wcnss.c b/drivers/remoteproc/qcom_wcnss.c
new file mode 100644
index 000000000..6cc0f9a55
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss.c
@@ -0,0 +1,627 @@
+/*
+ * Qualcomm Wireless Connectivity Subsystem Peripheral Image Loader
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/qcom_scm.h>
+#include <linux/regulator/consumer.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+#include <linux/rpmsg/qcom_smd.h>
+
+#include "qcom_common.h"
+#include "remoteproc_internal.h"
+#include "qcom_wcnss.h"
+
+#define WCNSS_CRASH_REASON_SMEM		422
+#define WCNSS_FIRMWARE_NAME		"wcnss.mdt"
+#define WCNSS_PAS_ID			6
+#define WCNSS_SSCTL_ID			0x13
+
+#define WCNSS_SPARE_NVBIN_DLND		BIT(25)
+
+#define WCNSS_PMU_IRIS_XO_CFG		BIT(3)
+#define WCNSS_PMU_IRIS_XO_EN		BIT(4)
+#define WCNSS_PMU_GC_BUS_MUX_SEL_TOP	BIT(5)
+#define WCNSS_PMU_IRIS_XO_CFG_STS	BIT(6) /* 1: in progress, 0: done */
+
+#define WCNSS_PMU_IRIS_RESET		BIT(7)
+#define WCNSS_PMU_IRIS_RESET_STS	BIT(8) /* 1: in progress, 0: done */
+#define WCNSS_PMU_IRIS_XO_READ		BIT(9)
+#define WCNSS_PMU_IRIS_XO_READ_STS	BIT(10)
+
+#define WCNSS_PMU_XO_MODE_MASK		GENMASK(2, 1)
+#define WCNSS_PMU_XO_MODE_19p2		0
+#define WCNSS_PMU_XO_MODE_48		3
+
+struct wcnss_data {
+	size_t pmu_offset;
+	size_t spare_offset;
+
+	const struct wcnss_vreg_info *vregs;
+	size_t num_vregs;
+};
+
+struct qcom_wcnss {
+	struct device *dev;
+	struct rproc *rproc;
+
+	void __iomem *pmu_cfg;
+	void __iomem *spare_out;
+
+	bool use_48mhz_xo;
+
+	int wdog_irq;
+	int fatal_irq;
+	int ready_irq;
+	int handover_irq;
+	int stop_ack_irq;
+
+	struct qcom_smem_state *state;
+	unsigned stop_bit;
+
+	struct mutex iris_lock;
+	struct qcom_iris *iris;
+
+	struct regulator_bulk_data *vregs;
+	size_t num_vregs;
+
+	struct completion start_done;
+	struct completion stop_done;
+
+	phys_addr_t mem_phys;
+	phys_addr_t mem_reloc;
+	void *mem_region;
+	size_t mem_size;
+
+	struct qcom_rproc_subdev smd_subdev;
+	struct qcom_sysmon *sysmon;
+};
+
+static const struct wcnss_data riva_data = {
+	.pmu_offset = 0x28,
+	.spare_offset = 0xb4,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddmx",  1050000, 1150000, 0 },
+		{ "vddcx",  1050000, 1150000, 0 },
+		{ "vddpx",  1800000, 1800000, 0 },
+	},
+	.num_vregs = 3,
+};
+
+static const struct wcnss_data pronto_v1_data = {
+	.pmu_offset = 0x1004,
+	.spare_offset = 0x1088,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddmx", 950000, 1150000, 0 },
+		{ "vddcx", .super_turbo = true},
+		{ "vddpx", 1800000, 1800000, 0 },
+	},
+	.num_vregs = 3,
+};
+
+static const struct wcnss_data pronto_v2_data = {
+	.pmu_offset = 0x1004,
+	.spare_offset = 0x1088,
+
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddmx", 1287500, 1287500, 0 },
+		{ "vddcx", .super_turbo = true },
+		{ "vddpx", 1800000, 1800000, 0 },
+	},
+	.num_vregs = 3,
+};
+
+void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss,
+			    struct qcom_iris *iris,
+			    bool use_48mhz_xo)
+{
+	mutex_lock(&wcnss->iris_lock);
+
+	wcnss->iris = iris;
+	wcnss->use_48mhz_xo = use_48mhz_xo;
+
+	mutex_unlock(&wcnss->iris_lock);
+}
+
+static int wcnss_load(struct rproc *rproc, const struct firmware *fw)
+{
+	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+
+	return qcom_mdt_load(wcnss->dev, fw, rproc->firmware, WCNSS_PAS_ID,
+			     wcnss->mem_region, wcnss->mem_phys,
+			     wcnss->mem_size, &wcnss->mem_reloc);
+}
+
+static void wcnss_indicate_nv_download(struct qcom_wcnss *wcnss)
+{
+	u32 val;
+
+	/* Indicate NV download capability */
+	val = readl(wcnss->spare_out);
+	val |= WCNSS_SPARE_NVBIN_DLND;
+	writel(val, wcnss->spare_out);
+}
+
+static void wcnss_configure_iris(struct qcom_wcnss *wcnss)
+{
+	u32 val;
+
+	/* Clear PMU cfg register */
+	writel(0, wcnss->pmu_cfg);
+
+	val = WCNSS_PMU_GC_BUS_MUX_SEL_TOP | WCNSS_PMU_IRIS_XO_EN;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Clear XO_MODE */
+	val &= ~WCNSS_PMU_XO_MODE_MASK;
+	if (wcnss->use_48mhz_xo)
+		val |= WCNSS_PMU_XO_MODE_48 << 1;
+	else
+		val |= WCNSS_PMU_XO_MODE_19p2 << 1;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Reset IRIS */
+	val |= WCNSS_PMU_IRIS_RESET;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Wait for PMU.iris_reg_reset_sts */
+	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_RESET_STS)
+		cpu_relax();
+
+	/* Clear IRIS reset */
+	val &= ~WCNSS_PMU_IRIS_RESET;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Start IRIS XO configuration */
+	val |= WCNSS_PMU_IRIS_XO_CFG;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Wait for XO configuration to finish */
+	while (readl(wcnss->pmu_cfg) & WCNSS_PMU_IRIS_XO_CFG_STS)
+		cpu_relax();
+
+	/* Stop IRIS XO configuration */
+	val &= ~WCNSS_PMU_GC_BUS_MUX_SEL_TOP;
+	val &= ~WCNSS_PMU_IRIS_XO_CFG;
+	writel(val, wcnss->pmu_cfg);
+
+	/* Add some delay for XO to settle */
+	msleep(20);
+}
+
+static int wcnss_start(struct rproc *rproc)
+{
+	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+	int ret;
+
+	mutex_lock(&wcnss->iris_lock);
+	if (!wcnss->iris) {
+		dev_err(wcnss->dev, "no iris registered\n");
+		ret = -EINVAL;
+		goto release_iris_lock;
+	}
+
+	ret = regulator_bulk_enable(wcnss->num_vregs, wcnss->vregs);
+	if (ret)
+		goto release_iris_lock;
+
+	ret = qcom_iris_enable(wcnss->iris);
+	if (ret)
+		goto disable_regulators;
+
+	wcnss_indicate_nv_download(wcnss);
+	wcnss_configure_iris(wcnss);
+
+	ret = qcom_scm_pas_auth_and_reset(WCNSS_PAS_ID);
+	if (ret) {
+		dev_err(wcnss->dev,
+			"failed to authenticate image and release reset\n");
+		goto disable_iris;
+	}
+
+	ret = wait_for_completion_timeout(&wcnss->start_done,
+					  msecs_to_jiffies(5000));
+	if (wcnss->ready_irq > 0 && ret == 0) {
+		/* We have a ready_irq, but it didn't fire in time. */
+		dev_err(wcnss->dev, "start timed out\n");
+		qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+		ret = -ETIMEDOUT;
+		goto disable_iris;
+	}
+
+	ret = 0;
+
+disable_iris:
+	qcom_iris_disable(wcnss->iris);
+disable_regulators:
+	regulator_bulk_disable(wcnss->num_vregs, wcnss->vregs);
+release_iris_lock:
+	mutex_unlock(&wcnss->iris_lock);
+
+	return ret;
+}
+
+static int wcnss_stop(struct rproc *rproc)
+{
+	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+	int ret;
+
+	if (wcnss->state) {
+		qcom_smem_state_update_bits(wcnss->state,
+					    BIT(wcnss->stop_bit),
+					    BIT(wcnss->stop_bit));
+
+		ret = wait_for_completion_timeout(&wcnss->stop_done,
+						  msecs_to_jiffies(5000));
+		if (ret == 0)
+			dev_err(wcnss->dev, "timed out on wait\n");
+
+		qcom_smem_state_update_bits(wcnss->state,
+					    BIT(wcnss->stop_bit),
+					    0);
+	}
+
+	ret = qcom_scm_pas_shutdown(WCNSS_PAS_ID);
+	if (ret)
+		dev_err(wcnss->dev, "failed to shutdown: %d\n", ret);
+
+	return ret;
+}
+
+static void *wcnss_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct qcom_wcnss *wcnss = (struct qcom_wcnss *)rproc->priv;
+	int offset;
+
+	offset = da - wcnss->mem_reloc;
+	if (offset < 0 || offset + len > wcnss->mem_size)
+		return NULL;
+
+	return wcnss->mem_region + offset;
+}
+
+static const struct rproc_ops wcnss_ops = {
+	.start = wcnss_start,
+	.stop = wcnss_stop,
+	.da_to_va = wcnss_da_to_va,
+	.parse_fw = qcom_register_dump_segments,
+	.load = wcnss_load,
+};
+
+static irqreturn_t wcnss_wdog_interrupt(int irq, void *dev)
+{
+	struct qcom_wcnss *wcnss = dev;
+
+	rproc_report_crash(wcnss->rproc, RPROC_WATCHDOG);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_fatal_interrupt(int irq, void *dev)
+{
+	struct qcom_wcnss *wcnss = dev;
+	size_t len;
+	char *msg;
+
+	msg = qcom_smem_get(QCOM_SMEM_HOST_ANY, WCNSS_CRASH_REASON_SMEM, &len);
+	if (!IS_ERR(msg) && len > 0 && msg[0])
+		dev_err(wcnss->dev, "fatal error received: %s\n", msg);
+
+	rproc_report_crash(wcnss->rproc, RPROC_FATAL_ERROR);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_ready_interrupt(int irq, void *dev)
+{
+	struct qcom_wcnss *wcnss = dev;
+
+	complete(&wcnss->start_done);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_handover_interrupt(int irq, void *dev)
+{
+	/*
+	 * XXX: At this point we're supposed to release the resources that we
+	 * have been holding on behalf of the WCNSS. Unfortunately this
+	 * interrupt comes way before the other side seems to be done.
+	 *
+	 * So we're currently relying on the ready interrupt firing later then
+	 * this and we just disable the resources at the end of wcnss_start().
+	 */
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t wcnss_stop_ack_interrupt(int irq, void *dev)
+{
+	struct qcom_wcnss *wcnss = dev;
+
+	complete(&wcnss->stop_done);
+
+	return IRQ_HANDLED;
+}
+
+static int wcnss_init_regulators(struct qcom_wcnss *wcnss,
+				 const struct wcnss_vreg_info *info,
+				 int num_vregs)
+{
+	struct regulator_bulk_data *bulk;
+	int ret;
+	int i;
+
+	bulk = devm_kcalloc(wcnss->dev,
+			    num_vregs, sizeof(struct regulator_bulk_data),
+			    GFP_KERNEL);
+	if (!bulk)
+		return -ENOMEM;
+
+	for (i = 0; i < num_vregs; i++)
+		bulk[i].supply = info[i].name;
+
+	ret = devm_regulator_bulk_get(wcnss->dev, num_vregs, bulk);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < num_vregs; i++) {
+		if (info[i].max_voltage)
+			regulator_set_voltage(bulk[i].consumer,
+					      info[i].min_voltage,
+					      info[i].max_voltage);
+
+		if (info[i].load_uA)
+			regulator_set_load(bulk[i].consumer, info[i].load_uA);
+	}
+
+	wcnss->vregs = bulk;
+	wcnss->num_vregs = num_vregs;
+
+	return 0;
+}
+
+static int wcnss_request_irq(struct qcom_wcnss *wcnss,
+			     struct platform_device *pdev,
+			     const char *name,
+			     bool optional,
+			     irq_handler_t thread_fn)
+{
+	int ret;
+
+	ret = platform_get_irq_byname(pdev, name);
+	if (ret < 0 && optional) {
+		dev_dbg(&pdev->dev, "no %s IRQ defined, ignoring\n", name);
+		return 0;
+	} else if (ret < 0) {
+		dev_err(&pdev->dev, "no %s IRQ defined\n", name);
+		return ret;
+	}
+
+	ret = devm_request_threaded_irq(&pdev->dev, ret,
+					NULL, thread_fn,
+					IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+					"wcnss", wcnss);
+	if (ret)
+		dev_err(&pdev->dev, "request %s IRQ failed\n", name);
+
+	return ret;
+}
+
+static int wcnss_alloc_memory_region(struct qcom_wcnss *wcnss)
+{
+	struct device_node *node;
+	struct resource r;
+	int ret;
+
+	node = of_parse_phandle(wcnss->dev->of_node, "memory-region", 0);
+	if (!node) {
+		dev_err(wcnss->dev, "no memory-region specified\n");
+		return -EINVAL;
+	}
+
+	ret = of_address_to_resource(node, 0, &r);
+	of_node_put(node);
+	if (ret)
+		return ret;
+
+	wcnss->mem_phys = wcnss->mem_reloc = r.start;
+	wcnss->mem_size = resource_size(&r);
+	wcnss->mem_region = devm_ioremap_wc(wcnss->dev, wcnss->mem_phys, wcnss->mem_size);
+	if (!wcnss->mem_region) {
+		dev_err(wcnss->dev, "unable to map memory region: %pa+%zx\n",
+			&r.start, wcnss->mem_size);
+		return -EBUSY;
+	}
+
+	return 0;
+}
+
+static int wcnss_probe(struct platform_device *pdev)
+{
+	const struct wcnss_data *data;
+	struct qcom_wcnss *wcnss;
+	struct resource *res;
+	struct rproc *rproc;
+	void __iomem *mmio;
+	int ret;
+
+	data = of_device_get_match_data(&pdev->dev);
+
+	if (!qcom_scm_is_available())
+		return -EPROBE_DEFER;
+
+	if (!qcom_scm_pas_supported(WCNSS_PAS_ID)) {
+		dev_err(&pdev->dev, "PAS is not available for WCNSS\n");
+		return -ENXIO;
+	}
+
+	rproc = rproc_alloc(&pdev->dev, pdev->name, &wcnss_ops,
+			    WCNSS_FIRMWARE_NAME, sizeof(*wcnss));
+	if (!rproc) {
+		dev_err(&pdev->dev, "unable to allocate remoteproc\n");
+		return -ENOMEM;
+	}
+
+	wcnss = (struct qcom_wcnss *)rproc->priv;
+	wcnss->dev = &pdev->dev;
+	wcnss->rproc = rproc;
+	platform_set_drvdata(pdev, wcnss);
+
+	init_completion(&wcnss->start_done);
+	init_completion(&wcnss->stop_done);
+
+	mutex_init(&wcnss->iris_lock);
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "pmu");
+	mmio = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(mmio)) {
+		ret = PTR_ERR(mmio);
+		goto free_rproc;
+	};
+
+	ret = wcnss_alloc_memory_region(wcnss);
+	if (ret)
+		goto free_rproc;
+
+	wcnss->pmu_cfg = mmio + data->pmu_offset;
+	wcnss->spare_out = mmio + data->spare_offset;
+
+	ret = wcnss_init_regulators(wcnss, data->vregs, data->num_vregs);
+	if (ret)
+		goto free_rproc;
+
+	ret = wcnss_request_irq(wcnss, pdev, "wdog", false, wcnss_wdog_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->wdog_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "fatal", false, wcnss_fatal_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->fatal_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "ready", true, wcnss_ready_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->ready_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "handover", true, wcnss_handover_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->handover_irq = ret;
+
+	ret = wcnss_request_irq(wcnss, pdev, "stop-ack", true, wcnss_stop_ack_interrupt);
+	if (ret < 0)
+		goto free_rproc;
+	wcnss->stop_ack_irq = ret;
+
+	if (wcnss->stop_ack_irq) {
+		wcnss->state = qcom_smem_state_get(&pdev->dev, "stop",
+						   &wcnss->stop_bit);
+		if (IS_ERR(wcnss->state)) {
+			ret = PTR_ERR(wcnss->state);
+			goto free_rproc;
+		}
+	}
+
+	qcom_add_smd_subdev(rproc, &wcnss->smd_subdev);
+	wcnss->sysmon = qcom_add_sysmon_subdev(rproc, "wcnss", WCNSS_SSCTL_ID);
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_rproc;
+
+	return of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev);
+
+free_rproc:
+	rproc_free(rproc);
+
+	return ret;
+}
+
+static int wcnss_remove(struct platform_device *pdev)
+{
+	struct qcom_wcnss *wcnss = platform_get_drvdata(pdev);
+
+	of_platform_depopulate(&pdev->dev);
+
+	qcom_smem_state_put(wcnss->state);
+	rproc_del(wcnss->rproc);
+
+	qcom_remove_sysmon_subdev(wcnss->sysmon);
+	qcom_remove_smd_subdev(wcnss->rproc, &wcnss->smd_subdev);
+	rproc_free(wcnss->rproc);
+
+	return 0;
+}
+
+static const struct of_device_id wcnss_of_match[] = {
+	{ .compatible = "qcom,riva-pil", &riva_data },
+	{ .compatible = "qcom,pronto-v1-pil", &pronto_v1_data },
+	{ .compatible = "qcom,pronto-v2-pil", &pronto_v2_data },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, wcnss_of_match);
+
+static struct platform_driver wcnss_driver = {
+	.probe = wcnss_probe,
+	.remove = wcnss_remove,
+	.driver = {
+		.name = "qcom-wcnss-pil",
+		.of_match_table = wcnss_of_match,
+	},
+};
+
+static int __init wcnss_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&wcnss_driver);
+	if (ret)
+		return ret;
+
+	ret = platform_driver_register(&qcom_iris_driver);
+	if (ret)
+		platform_driver_unregister(&wcnss_driver);
+
+	return ret;
+}
+module_init(wcnss_init);
+
+static void __exit wcnss_exit(void)
+{
+	platform_driver_unregister(&qcom_iris_driver);
+	platform_driver_unregister(&wcnss_driver);
+}
+module_exit(wcnss_exit);
+
+MODULE_DESCRIPTION("Qualcomm Peripherial Image Loader for Wireless Subsystem");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/qcom_wcnss.h b/drivers/remoteproc/qcom_wcnss.h
new file mode 100644
index 000000000..62c8682d0
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __QCOM_WNCSS_H__
+#define __QCOM_WNCSS_H__
+
+struct qcom_iris;
+struct qcom_wcnss;
+
+extern struct platform_driver qcom_iris_driver;
+
+struct wcnss_vreg_info {
+	const char * const name;
+	int min_voltage;
+	int max_voltage;
+
+	int load_uA;
+
+	bool super_turbo;
+};
+
+int qcom_iris_enable(struct qcom_iris *iris);
+void qcom_iris_disable(struct qcom_iris *iris);
+
+void qcom_wcnss_assign_iris(struct qcom_wcnss *wcnss, struct qcom_iris *iris, bool use_48mhz_xo);
+
+#endif
diff --git a/drivers/remoteproc/qcom_wcnss_iris.c b/drivers/remoteproc/qcom_wcnss_iris.c
new file mode 100644
index 000000000..e842be58e
--- /dev/null
+++ b/drivers/remoteproc/qcom_wcnss_iris.c
@@ -0,0 +1,183 @@
+/*
+ * Qualcomm Wireless Connectivity Subsystem Iris driver
+ *
+ * Copyright (C) 2016 Linaro Ltd
+ * Copyright (C) 2014 Sony Mobile Communications AB
+ * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
+ *
+ * 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/clk.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+
+#include "qcom_wcnss.h"
+
+struct qcom_iris {
+	struct device *dev;
+
+	struct clk *xo_clk;
+
+	struct regulator_bulk_data *vregs;
+	size_t num_vregs;
+};
+
+struct iris_data {
+	const struct wcnss_vreg_info *vregs;
+	size_t num_vregs;
+
+	bool use_48mhz_xo;
+};
+
+static const struct iris_data wcn3620_data = {
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddxo",  1800000, 1800000, 10000 },
+		{ "vddrfa", 1300000, 1300000, 100000 },
+		{ "vddpa",  3300000, 3300000, 515000 },
+		{ "vdddig", 1800000, 1800000, 10000 },
+	},
+	.num_vregs = 4,
+	.use_48mhz_xo = false,
+};
+
+static const struct iris_data wcn3660_data = {
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddxo",  1800000, 1800000, 10000 },
+		{ "vddrfa", 1300000, 1300000, 100000 },
+		{ "vddpa",  2900000, 3000000, 515000 },
+		{ "vdddig", 1200000, 1225000, 10000 },
+	},
+	.num_vregs = 4,
+	.use_48mhz_xo = true,
+};
+
+static const struct iris_data wcn3680_data = {
+	.vregs = (struct wcnss_vreg_info[]) {
+		{ "vddxo",  1800000, 1800000, 10000 },
+		{ "vddrfa", 1300000, 1300000, 100000 },
+		{ "vddpa",  3300000, 3300000, 515000 },
+		{ "vdddig", 1800000, 1800000, 10000 },
+	},
+	.num_vregs = 4,
+	.use_48mhz_xo = true,
+};
+
+int qcom_iris_enable(struct qcom_iris *iris)
+{
+	int ret;
+
+	ret = regulator_bulk_enable(iris->num_vregs, iris->vregs);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(iris->xo_clk);
+	if (ret) {
+		dev_err(iris->dev, "failed to enable xo clk\n");
+		goto disable_regulators;
+	}
+
+	return 0;
+
+disable_regulators:
+	regulator_bulk_disable(iris->num_vregs, iris->vregs);
+
+	return ret;
+}
+
+void qcom_iris_disable(struct qcom_iris *iris)
+{
+	clk_disable_unprepare(iris->xo_clk);
+	regulator_bulk_disable(iris->num_vregs, iris->vregs);
+}
+
+static int qcom_iris_probe(struct platform_device *pdev)
+{
+	const struct iris_data *data;
+	struct qcom_wcnss *wcnss;
+	struct qcom_iris *iris;
+	int ret;
+	int i;
+
+	iris = devm_kzalloc(&pdev->dev, sizeof(struct qcom_iris), GFP_KERNEL);
+	if (!iris)
+		return -ENOMEM;
+
+	data = of_device_get_match_data(&pdev->dev);
+	wcnss = dev_get_drvdata(pdev->dev.parent);
+
+	iris->xo_clk = devm_clk_get(&pdev->dev, "xo");
+	if (IS_ERR(iris->xo_clk)) {
+		if (PTR_ERR(iris->xo_clk) != -EPROBE_DEFER)
+			dev_err(&pdev->dev, "failed to acquire xo clk\n");
+		return PTR_ERR(iris->xo_clk);
+	}
+
+	iris->num_vregs = data->num_vregs;
+	iris->vregs = devm_kcalloc(&pdev->dev,
+				   iris->num_vregs,
+				   sizeof(struct regulator_bulk_data),
+				   GFP_KERNEL);
+	if (!iris->vregs)
+		return -ENOMEM;
+
+	for (i = 0; i < iris->num_vregs; i++)
+		iris->vregs[i].supply = data->vregs[i].name;
+
+	ret = devm_regulator_bulk_get(&pdev->dev, iris->num_vregs, iris->vregs);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to get regulators\n");
+		return ret;
+	}
+
+	for (i = 0; i < iris->num_vregs; i++) {
+		if (data->vregs[i].max_voltage)
+			regulator_set_voltage(iris->vregs[i].consumer,
+					      data->vregs[i].min_voltage,
+					      data->vregs[i].max_voltage);
+
+		if (data->vregs[i].load_uA)
+			regulator_set_load(iris->vregs[i].consumer,
+					   data->vregs[i].load_uA);
+	}
+
+	qcom_wcnss_assign_iris(wcnss, iris, data->use_48mhz_xo);
+
+	return 0;
+}
+
+static int qcom_iris_remove(struct platform_device *pdev)
+{
+	struct qcom_wcnss *wcnss = dev_get_drvdata(pdev->dev.parent);
+
+	qcom_wcnss_assign_iris(wcnss, NULL, false);
+
+	return 0;
+}
+
+static const struct of_device_id iris_of_match[] = {
+	{ .compatible = "qcom,wcn3620", .data = &wcn3620_data },
+	{ .compatible = "qcom,wcn3660", .data = &wcn3660_data },
+	{ .compatible = "qcom,wcn3680", .data = &wcn3680_data },
+	{}
+};
+MODULE_DEVICE_TABLE(of, iris_of_match);
+
+struct platform_driver qcom_iris_driver = {
+	.probe = qcom_iris_probe,
+	.remove = qcom_iris_remove,
+	.driver = {
+		.name = "qcom-iris",
+		.of_match_table = iris_of_match,
+	},
+};
diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
new file mode 100644
index 000000000..e48069db1
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -0,0 +1,1800 @@
+/*
+ * Remote Processor Framework
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ * Mark Grosen <mgrosen@ti.com>
+ * Fernando Guzman Lugo <fernando.lugo@ti.com>
+ * Suman Anna <s-anna@ti.com>
+ * Robert Tivy <rtivy@ti.com>
+ * Armando Uribe De Leon <x0095078@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 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.
+ */
+
+#define pr_fmt(fmt)    "%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/dma-mapping.h>
+#include <linux/firmware.h>
+#include <linux/string.h>
+#include <linux/debugfs.h>
+#include <linux/devcoredump.h>
+#include <linux/remoteproc.h>
+#include <linux/iommu.h>
+#include <linux/idr.h>
+#include <linux/elf.h>
+#include <linux/crc32.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_ring.h>
+#include <asm/byteorder.h>
+
+#include "remoteproc_internal.h"
+
+static DEFINE_MUTEX(rproc_list_mutex);
+static LIST_HEAD(rproc_list);
+
+typedef int (*rproc_handle_resources_t)(struct rproc *rproc,
+				struct resource_table *table, int len);
+typedef int (*rproc_handle_resource_t)(struct rproc *rproc,
+				 void *, int offset, int avail);
+
+/* Unique indices for remoteproc devices */
+static DEFINE_IDA(rproc_dev_index);
+
+static const char * const rproc_crash_names[] = {
+	[RPROC_MMUFAULT]	= "mmufault",
+	[RPROC_WATCHDOG]	= "watchdog",
+	[RPROC_FATAL_ERROR]	= "fatal error",
+};
+
+/* translate rproc_crash_type to string */
+static const char *rproc_crash_to_string(enum rproc_crash_type type)
+{
+	if (type < ARRAY_SIZE(rproc_crash_names))
+		return rproc_crash_names[type];
+	return "unknown";
+}
+
+/*
+ * This is the IOMMU fault handler we register with the IOMMU API
+ * (when relevant; not all remote processors access memory through
+ * an IOMMU).
+ *
+ * IOMMU core will invoke this handler whenever the remote processor
+ * will try to access an unmapped device address.
+ */
+static int rproc_iommu_fault(struct iommu_domain *domain, struct device *dev,
+			     unsigned long iova, int flags, void *token)
+{
+	struct rproc *rproc = token;
+
+	dev_err(dev, "iommu fault: da 0x%lx flags 0x%x\n", iova, flags);
+
+	rproc_report_crash(rproc, RPROC_MMUFAULT);
+
+	/*
+	 * Let the iommu core know we're not really handling this fault;
+	 * we just used it as a recovery trigger.
+	 */
+	return -ENOSYS;
+}
+
+static int rproc_enable_iommu(struct rproc *rproc)
+{
+	struct iommu_domain *domain;
+	struct device *dev = rproc->dev.parent;
+	int ret;
+
+	if (!rproc->has_iommu) {
+		dev_dbg(dev, "iommu not present\n");
+		return 0;
+	}
+
+	domain = iommu_domain_alloc(dev->bus);
+	if (!domain) {
+		dev_err(dev, "can't alloc iommu domain\n");
+		return -ENOMEM;
+	}
+
+	iommu_set_fault_handler(domain, rproc_iommu_fault, rproc);
+
+	ret = iommu_attach_device(domain, dev);
+	if (ret) {
+		dev_err(dev, "can't attach iommu device: %d\n", ret);
+		goto free_domain;
+	}
+
+	rproc->domain = domain;
+
+	return 0;
+
+free_domain:
+	iommu_domain_free(domain);
+	return ret;
+}
+
+static void rproc_disable_iommu(struct rproc *rproc)
+{
+	struct iommu_domain *domain = rproc->domain;
+	struct device *dev = rproc->dev.parent;
+
+	if (!domain)
+		return;
+
+	iommu_detach_device(domain, dev);
+	iommu_domain_free(domain);
+}
+
+/**
+ * rproc_da_to_va() - lookup the kernel virtual address for a remoteproc address
+ * @rproc: handle of a remote processor
+ * @da: remoteproc device address to translate
+ * @len: length of the memory region @da is pointing to
+ *
+ * Some remote processors will ask us to allocate them physically contiguous
+ * memory regions (which we call "carveouts"), and map them to specific
+ * device addresses (which are hardcoded in the firmware). They may also have
+ * dedicated memory regions internal to the processors, and use them either
+ * exclusively or alongside carveouts.
+ *
+ * They may then ask us to copy objects into specific device addresses (e.g.
+ * code/data sections) or expose us certain symbols in other device address
+ * (e.g. their trace buffer).
+ *
+ * This function is a helper function with which we can go over the allocated
+ * carveouts and translate specific device addresses to kernel virtual addresses
+ * so we can access the referenced memory. This function also allows to perform
+ * translations on the internal remoteproc memory regions through a platform
+ * implementation specific da_to_va ops, if present.
+ *
+ * The function returns a valid kernel address on success or NULL on failure.
+ *
+ * Note: phys_to_virt(iommu_iova_to_phys(rproc->domain, da)) will work too,
+ * but only on kernel direct mapped RAM memory. Instead, we're just using
+ * here the output of the DMA API for the carveouts, which should be more
+ * correct.
+ */
+void *rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct rproc_mem_entry *carveout;
+	void *ptr = NULL;
+
+	if (rproc->ops->da_to_va) {
+		ptr = rproc->ops->da_to_va(rproc, da, len);
+		if (ptr)
+			goto out;
+	}
+
+	list_for_each_entry(carveout, &rproc->carveouts, node) {
+		int offset = da - carveout->da;
+
+		/* try next carveout if da is too small */
+		if (offset < 0)
+			continue;
+
+		/* try next carveout if da is too large */
+		if (offset + len > carveout->len)
+			continue;
+
+		ptr = carveout->va + offset;
+
+		break;
+	}
+
+out:
+	return ptr;
+}
+EXPORT_SYMBOL(rproc_da_to_va);
+
+int rproc_alloc_vring(struct rproc_vdev *rvdev, int i)
+{
+	struct rproc *rproc = rvdev->rproc;
+	struct device *dev = &rproc->dev;
+	struct rproc_vring *rvring = &rvdev->vring[i];
+	struct fw_rsc_vdev *rsc;
+	dma_addr_t dma;
+	void *va;
+	int ret, size, notifyid;
+
+	/* actual size of vring (in bytes) */
+	size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
+
+	/*
+	 * Allocate non-cacheable memory for the vring. In the future
+	 * this call will also configure the IOMMU for us
+	 */
+	va = dma_alloc_coherent(dev->parent, size, &dma, GFP_KERNEL);
+	if (!va) {
+		dev_err(dev->parent, "dma_alloc_coherent failed\n");
+		return -EINVAL;
+	}
+
+	/*
+	 * Assign an rproc-wide unique index for this vring
+	 * TODO: assign a notifyid for rvdev updates as well
+	 * TODO: support predefined notifyids (via resource table)
+	 */
+	ret = idr_alloc(&rproc->notifyids, rvring, 0, 0, GFP_KERNEL);
+	if (ret < 0) {
+		dev_err(dev, "idr_alloc failed: %d\n", ret);
+		dma_free_coherent(dev->parent, size, va, dma);
+		return ret;
+	}
+	notifyid = ret;
+
+	/* Potentially bump max_notifyid */
+	if (notifyid > rproc->max_notifyid)
+		rproc->max_notifyid = notifyid;
+
+	dev_dbg(dev, "vring%d: va %pK dma %pad size 0x%x idr %d\n",
+		i, va, &dma, size, notifyid);
+
+	rvring->va = va;
+	rvring->dma = dma;
+	rvring->notifyid = notifyid;
+
+	/*
+	 * Let the rproc know the notifyid and da of this vring.
+	 * Not all platforms use dma_alloc_coherent to automatically
+	 * set up the iommu. In this case the device address (da) will
+	 * hold the physical address and not the device address.
+	 */
+	rsc = (void *)rproc->table_ptr + rvdev->rsc_offset;
+	rsc->vring[i].da = dma;
+	rsc->vring[i].notifyid = notifyid;
+	return 0;
+}
+
+static int
+rproc_parse_vring(struct rproc_vdev *rvdev, struct fw_rsc_vdev *rsc, int i)
+{
+	struct rproc *rproc = rvdev->rproc;
+	struct device *dev = &rproc->dev;
+	struct fw_rsc_vdev_vring *vring = &rsc->vring[i];
+	struct rproc_vring *rvring = &rvdev->vring[i];
+
+	dev_dbg(dev, "vdev rsc: vring%d: da 0x%x, qsz %d, align %d\n",
+		i, vring->da, vring->num, vring->align);
+
+	/* verify queue size and vring alignment are sane */
+	if (!vring->num || !vring->align) {
+		dev_err(dev, "invalid qsz (%d) or alignment (%d)\n",
+			vring->num, vring->align);
+		return -EINVAL;
+	}
+
+	rvring->len = vring->num;
+	rvring->align = vring->align;
+	rvring->rvdev = rvdev;
+
+	return 0;
+}
+
+void rproc_free_vring(struct rproc_vring *rvring)
+{
+	int size = PAGE_ALIGN(vring_size(rvring->len, rvring->align));
+	struct rproc *rproc = rvring->rvdev->rproc;
+	int idx = rvring - rvring->rvdev->vring;
+	struct fw_rsc_vdev *rsc;
+
+	dma_free_coherent(rproc->dev.parent, size, rvring->va, rvring->dma);
+	idr_remove(&rproc->notifyids, rvring->notifyid);
+
+	/* reset resource entry info */
+	rsc = (void *)rproc->table_ptr + rvring->rvdev->rsc_offset;
+	rsc->vring[idx].da = 0;
+	rsc->vring[idx].notifyid = -1;
+}
+
+static int rproc_vdev_do_start(struct rproc_subdev *subdev)
+{
+	struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
+
+	return rproc_add_virtio_dev(rvdev, rvdev->id);
+}
+
+static void rproc_vdev_do_stop(struct rproc_subdev *subdev, bool crashed)
+{
+	struct rproc_vdev *rvdev = container_of(subdev, struct rproc_vdev, subdev);
+
+	rproc_remove_virtio_dev(rvdev);
+}
+
+/**
+ * rproc_handle_vdev() - handle a vdev fw resource
+ * @rproc: the remote processor
+ * @rsc: the vring resource descriptor
+ * @avail: size of available data (for sanity checking the image)
+ *
+ * This resource entry requests the host to statically register a virtio
+ * device (vdev), and setup everything needed to support it. It contains
+ * everything needed to make it possible: the virtio device id, virtio
+ * device features, vrings information, virtio config space, etc...
+ *
+ * Before registering the vdev, the vrings are allocated from non-cacheable
+ * physically contiguous memory. Currently we only support two vrings per
+ * remote processor (temporary limitation). We might also want to consider
+ * doing the vring allocation only later when ->find_vqs() is invoked, and
+ * then release them upon ->del_vqs().
+ *
+ * Note: @da is currently not really handled correctly: we dynamically
+ * allocate it using the DMA API, ignoring requested hard coded addresses,
+ * and we don't take care of any required IOMMU programming. This is all
+ * going to be taken care of when the generic iommu-based DMA API will be
+ * merged. Meanwhile, statically-addressed iommu-based firmware images should
+ * use RSC_DEVMEM resource entries to map their required @da to the physical
+ * address of their base CMA region (ouch, hacky!).
+ *
+ * Returns 0 on success, or an appropriate error code otherwise
+ */
+static int rproc_handle_vdev(struct rproc *rproc, struct fw_rsc_vdev *rsc,
+			     int offset, int avail)
+{
+	struct device *dev = &rproc->dev;
+	struct rproc_vdev *rvdev;
+	int i, ret;
+
+	/* make sure resource isn't truncated */
+	if (sizeof(*rsc) + rsc->num_of_vrings * sizeof(struct fw_rsc_vdev_vring)
+			+ rsc->config_len > avail) {
+		dev_err(dev, "vdev rsc is truncated\n");
+		return -EINVAL;
+	}
+
+	/* make sure reserved bytes are zeroes */
+	if (rsc->reserved[0] || rsc->reserved[1]) {
+		dev_err(dev, "vdev rsc has non zero reserved bytes\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "vdev rsc: id %d, dfeatures 0x%x, cfg len %d, %d vrings\n",
+		rsc->id, rsc->dfeatures, rsc->config_len, rsc->num_of_vrings);
+
+	/* we currently support only two vrings per rvdev */
+	if (rsc->num_of_vrings > ARRAY_SIZE(rvdev->vring)) {
+		dev_err(dev, "too many vrings: %d\n", rsc->num_of_vrings);
+		return -EINVAL;
+	}
+
+	rvdev = kzalloc(sizeof(*rvdev), GFP_KERNEL);
+	if (!rvdev)
+		return -ENOMEM;
+
+	kref_init(&rvdev->refcount);
+
+	rvdev->id = rsc->id;
+	rvdev->rproc = rproc;
+
+	/* parse the vrings */
+	for (i = 0; i < rsc->num_of_vrings; i++) {
+		ret = rproc_parse_vring(rvdev, rsc, i);
+		if (ret)
+			goto free_rvdev;
+	}
+
+	/* remember the resource offset*/
+	rvdev->rsc_offset = offset;
+
+	/* allocate the vring resources */
+	for (i = 0; i < rsc->num_of_vrings; i++) {
+		ret = rproc_alloc_vring(rvdev, i);
+		if (ret)
+			goto unwind_vring_allocations;
+	}
+
+	list_add_tail(&rvdev->node, &rproc->rvdevs);
+
+	rvdev->subdev.start = rproc_vdev_do_start;
+	rvdev->subdev.stop = rproc_vdev_do_stop;
+
+	rproc_add_subdev(rproc, &rvdev->subdev);
+
+	return 0;
+
+unwind_vring_allocations:
+	for (i--; i >= 0; i--)
+		rproc_free_vring(&rvdev->vring[i]);
+free_rvdev:
+	kfree(rvdev);
+	return ret;
+}
+
+void rproc_vdev_release(struct kref *ref)
+{
+	struct rproc_vdev *rvdev = container_of(ref, struct rproc_vdev, refcount);
+	struct rproc_vring *rvring;
+	struct rproc *rproc = rvdev->rproc;
+	int id;
+
+	for (id = 0; id < ARRAY_SIZE(rvdev->vring); id++) {
+		rvring = &rvdev->vring[id];
+		if (!rvring->va)
+			continue;
+
+		rproc_free_vring(rvring);
+	}
+
+	rproc_remove_subdev(rproc, &rvdev->subdev);
+	list_del(&rvdev->node);
+	kfree(rvdev);
+}
+
+/**
+ * rproc_handle_trace() - handle a shared trace buffer resource
+ * @rproc: the remote processor
+ * @rsc: the trace resource descriptor
+ * @avail: size of available data (for sanity checking the image)
+ *
+ * In case the remote processor dumps trace logs into memory,
+ * export it via debugfs.
+ *
+ * Currently, the 'da' member of @rsc should contain the device address
+ * where the remote processor is dumping the traces. Later we could also
+ * support dynamically allocating this address using the generic
+ * DMA API (but currently there isn't a use case for that).
+ *
+ * Returns 0 on success, or an appropriate error code otherwise
+ */
+static int rproc_handle_trace(struct rproc *rproc, struct fw_rsc_trace *rsc,
+			      int offset, int avail)
+{
+	struct rproc_mem_entry *trace;
+	struct device *dev = &rproc->dev;
+	void *ptr;
+	char name[15];
+
+	if (sizeof(*rsc) > avail) {
+		dev_err(dev, "trace rsc is truncated\n");
+		return -EINVAL;
+	}
+
+	/* make sure reserved bytes are zeroes */
+	if (rsc->reserved) {
+		dev_err(dev, "trace rsc has non zero reserved bytes\n");
+		return -EINVAL;
+	}
+
+	/* what's the kernel address of this resource ? */
+	ptr = rproc_da_to_va(rproc, rsc->da, rsc->len);
+	if (!ptr) {
+		dev_err(dev, "erroneous trace resource entry\n");
+		return -EINVAL;
+	}
+
+	trace = kzalloc(sizeof(*trace), GFP_KERNEL);
+	if (!trace)
+		return -ENOMEM;
+
+	/* set the trace buffer dma properties */
+	trace->len = rsc->len;
+	trace->va = ptr;
+
+	/* make sure snprintf always null terminates, even if truncating */
+	snprintf(name, sizeof(name), "trace%d", rproc->num_traces);
+
+	/* create the debugfs entry */
+	trace->priv = rproc_create_trace_file(name, rproc, trace);
+	if (!trace->priv) {
+		trace->va = NULL;
+		kfree(trace);
+		return -EINVAL;
+	}
+
+	list_add_tail(&trace->node, &rproc->traces);
+
+	rproc->num_traces++;
+
+	dev_dbg(dev, "%s added: va %pK, da 0x%x, len 0x%x\n",
+		name, ptr, rsc->da, rsc->len);
+
+	return 0;
+}
+
+/**
+ * rproc_handle_devmem() - handle devmem resource entry
+ * @rproc: remote processor handle
+ * @rsc: the devmem resource entry
+ * @avail: size of available data (for sanity checking the image)
+ *
+ * Remote processors commonly need to access certain on-chip peripherals.
+ *
+ * Some of these remote processors access memory via an iommu device,
+ * and might require us to configure their iommu before they can access
+ * the on-chip peripherals they need.
+ *
+ * This resource entry is a request to map such a peripheral device.
+ *
+ * These devmem entries will contain the physical address of the device in
+ * the 'pa' member. If a specific device address is expected, then 'da' will
+ * contain it (currently this is the only use case supported). 'len' will
+ * contain the size of the physical region we need to map.
+ *
+ * Currently we just "trust" those devmem entries to contain valid physical
+ * addresses, but this is going to change: we want the implementations to
+ * tell us ranges of physical addresses the firmware is allowed to request,
+ * and not allow firmwares to request access to physical addresses that
+ * are outside those ranges.
+ */
+static int rproc_handle_devmem(struct rproc *rproc, struct fw_rsc_devmem *rsc,
+			       int offset, int avail)
+{
+	struct rproc_mem_entry *mapping;
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	/* no point in handling this resource without a valid iommu domain */
+	if (!rproc->domain)
+		return -EINVAL;
+
+	if (sizeof(*rsc) > avail) {
+		dev_err(dev, "devmem rsc is truncated\n");
+		return -EINVAL;
+	}
+
+	/* make sure reserved bytes are zeroes */
+	if (rsc->reserved) {
+		dev_err(dev, "devmem rsc has non zero reserved bytes\n");
+		return -EINVAL;
+	}
+
+	mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
+	if (!mapping)
+		return -ENOMEM;
+
+	ret = iommu_map(rproc->domain, rsc->da, rsc->pa, rsc->len, rsc->flags);
+	if (ret) {
+		dev_err(dev, "failed to map devmem: %d\n", ret);
+		goto out;
+	}
+
+	/*
+	 * We'll need this info later when we'll want to unmap everything
+	 * (e.g. on shutdown).
+	 *
+	 * We can't trust the remote processor not to change the resource
+	 * table, so we must maintain this info independently.
+	 */
+	mapping->da = rsc->da;
+	mapping->len = rsc->len;
+	list_add_tail(&mapping->node, &rproc->mappings);
+
+	dev_dbg(dev, "mapped devmem pa 0x%x, da 0x%x, len 0x%x\n",
+		rsc->pa, rsc->da, rsc->len);
+
+	return 0;
+
+out:
+	kfree(mapping);
+	return ret;
+}
+
+/**
+ * rproc_handle_carveout() - handle phys contig memory allocation requests
+ * @rproc: rproc handle
+ * @rsc: the resource entry
+ * @avail: size of available data (for image validation)
+ *
+ * This function will handle firmware requests for allocation of physically
+ * contiguous memory regions.
+ *
+ * These request entries should come first in the firmware's resource table,
+ * as other firmware entries might request placing other data objects inside
+ * these memory regions (e.g. data/code segments, trace resource entries, ...).
+ *
+ * Allocating memory this way helps utilizing the reserved physical memory
+ * (e.g. CMA) more efficiently, and also minimizes the number of TLB entries
+ * needed to map it (in case @rproc is using an IOMMU). Reducing the TLB
+ * pressure is important; it may have a substantial impact on performance.
+ */
+static int rproc_handle_carveout(struct rproc *rproc,
+				 struct fw_rsc_carveout *rsc,
+				 int offset, int avail)
+{
+	struct rproc_mem_entry *carveout, *mapping;
+	struct device *dev = &rproc->dev;
+	dma_addr_t dma;
+	void *va;
+	int ret;
+
+	if (sizeof(*rsc) > avail) {
+		dev_err(dev, "carveout rsc is truncated\n");
+		return -EINVAL;
+	}
+
+	/* make sure reserved bytes are zeroes */
+	if (rsc->reserved) {
+		dev_err(dev, "carveout rsc has non zero reserved bytes\n");
+		return -EINVAL;
+	}
+
+	dev_dbg(dev, "carveout rsc: name: %s, da 0x%x, pa 0x%x, len 0x%x, flags 0x%x\n",
+		rsc->name, rsc->da, rsc->pa, rsc->len, rsc->flags);
+
+	carveout = kzalloc(sizeof(*carveout), GFP_KERNEL);
+	if (!carveout)
+		return -ENOMEM;
+
+	va = dma_alloc_coherent(dev->parent, rsc->len, &dma, GFP_KERNEL);
+	if (!va) {
+		dev_err(dev->parent,
+			"failed to allocate dma memory: len 0x%x\n", rsc->len);
+		ret = -ENOMEM;
+		goto free_carv;
+	}
+
+	dev_dbg(dev, "carveout va %pK, dma %pad, len 0x%x\n",
+		va, &dma, rsc->len);
+
+	/*
+	 * Ok, this is non-standard.
+	 *
+	 * Sometimes we can't rely on the generic iommu-based DMA API
+	 * to dynamically allocate the device address and then set the IOMMU
+	 * tables accordingly, because some remote processors might
+	 * _require_ us to use hard coded device addresses that their
+	 * firmware was compiled with.
+	 *
+	 * In this case, we must use the IOMMU API directly and map
+	 * the memory to the device address as expected by the remote
+	 * processor.
+	 *
+	 * Obviously such remote processor devices should not be configured
+	 * to use the iommu-based DMA API: we expect 'dma' to contain the
+	 * physical address in this case.
+	 */
+	if (rproc->domain) {
+		mapping = kzalloc(sizeof(*mapping), GFP_KERNEL);
+		if (!mapping) {
+			ret = -ENOMEM;
+			goto dma_free;
+		}
+
+		ret = iommu_map(rproc->domain, rsc->da, dma, rsc->len,
+				rsc->flags);
+		if (ret) {
+			dev_err(dev, "iommu_map failed: %d\n", ret);
+			goto free_mapping;
+		}
+
+		/*
+		 * We'll need this info later when we'll want to unmap
+		 * everything (e.g. on shutdown).
+		 *
+		 * We can't trust the remote processor not to change the
+		 * resource table, so we must maintain this info independently.
+		 */
+		mapping->da = rsc->da;
+		mapping->len = rsc->len;
+		list_add_tail(&mapping->node, &rproc->mappings);
+
+		dev_dbg(dev, "carveout mapped 0x%x to %pad\n",
+			rsc->da, &dma);
+	}
+
+	/*
+	 * Some remote processors might need to know the pa
+	 * even though they are behind an IOMMU. E.g., OMAP4's
+	 * remote M3 processor needs this so it can control
+	 * on-chip hardware accelerators that are not behind
+	 * the IOMMU, and therefor must know the pa.
+	 *
+	 * Generally we don't want to expose physical addresses
+	 * if we don't have to (remote processors are generally
+	 * _not_ trusted), so we might want to do this only for
+	 * remote processor that _must_ have this (e.g. OMAP4's
+	 * dual M3 subsystem).
+	 *
+	 * Non-IOMMU processors might also want to have this info.
+	 * In this case, the device address and the physical address
+	 * are the same.
+	 */
+	rsc->pa = dma;
+
+	carveout->va = va;
+	carveout->len = rsc->len;
+	carveout->dma = dma;
+	carveout->da = rsc->da;
+
+	list_add_tail(&carveout->node, &rproc->carveouts);
+
+	return 0;
+
+free_mapping:
+	kfree(mapping);
+dma_free:
+	dma_free_coherent(dev->parent, rsc->len, va, dma);
+free_carv:
+	kfree(carveout);
+	return ret;
+}
+
+/*
+ * A lookup table for resource handlers. The indices are defined in
+ * enum fw_resource_type.
+ */
+static rproc_handle_resource_t rproc_loading_handlers[RSC_LAST] = {
+	[RSC_CARVEOUT] = (rproc_handle_resource_t)rproc_handle_carveout,
+	[RSC_DEVMEM] = (rproc_handle_resource_t)rproc_handle_devmem,
+	[RSC_TRACE] = (rproc_handle_resource_t)rproc_handle_trace,
+	[RSC_VDEV] = (rproc_handle_resource_t)rproc_handle_vdev,
+};
+
+/* handle firmware resource entries before booting the remote processor */
+static int rproc_handle_resources(struct rproc *rproc,
+				  rproc_handle_resource_t handlers[RSC_LAST])
+{
+	struct device *dev = &rproc->dev;
+	rproc_handle_resource_t handler;
+	int ret = 0, i;
+
+	if (!rproc->table_ptr)
+		return 0;
+
+	for (i = 0; i < rproc->table_ptr->num; i++) {
+		int offset = rproc->table_ptr->offset[i];
+		struct fw_rsc_hdr *hdr = (void *)rproc->table_ptr + offset;
+		int avail = rproc->table_sz - offset - sizeof(*hdr);
+		void *rsc = (void *)hdr + sizeof(*hdr);
+
+		/* make sure table isn't truncated */
+		if (avail < 0) {
+			dev_err(dev, "rsc table is truncated\n");
+			return -EINVAL;
+		}
+
+		dev_dbg(dev, "rsc: type %d\n", hdr->type);
+
+		if (hdr->type >= RSC_LAST) {
+			dev_warn(dev, "unsupported resource %d\n", hdr->type);
+			continue;
+		}
+
+		handler = handlers[hdr->type];
+		if (!handler)
+			continue;
+
+		ret = handler(rproc, rsc, offset + sizeof(*hdr), avail);
+		if (ret)
+			break;
+	}
+
+	return ret;
+}
+
+static int rproc_prepare_subdevices(struct rproc *rproc)
+{
+	struct rproc_subdev *subdev;
+	int ret;
+
+	list_for_each_entry(subdev, &rproc->subdevs, node) {
+		if (subdev->prepare) {
+			ret = subdev->prepare(subdev);
+			if (ret)
+				goto unroll_preparation;
+		}
+	}
+
+	return 0;
+
+unroll_preparation:
+	list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->unprepare)
+			subdev->unprepare(subdev);
+	}
+
+	return ret;
+}
+
+static int rproc_start_subdevices(struct rproc *rproc)
+{
+	struct rproc_subdev *subdev;
+	int ret;
+
+	list_for_each_entry(subdev, &rproc->subdevs, node) {
+		if (subdev->start) {
+			ret = subdev->start(subdev);
+			if (ret)
+				goto unroll_registration;
+		}
+	}
+
+	return 0;
+
+unroll_registration:
+	list_for_each_entry_continue_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->stop)
+			subdev->stop(subdev, true);
+	}
+
+	return ret;
+}
+
+static void rproc_stop_subdevices(struct rproc *rproc, bool crashed)
+{
+	struct rproc_subdev *subdev;
+
+	list_for_each_entry_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->stop)
+			subdev->stop(subdev, crashed);
+	}
+}
+
+static void rproc_unprepare_subdevices(struct rproc *rproc)
+{
+	struct rproc_subdev *subdev;
+
+	list_for_each_entry_reverse(subdev, &rproc->subdevs, node) {
+		if (subdev->unprepare)
+			subdev->unprepare(subdev);
+	}
+}
+
+/**
+ * rproc_coredump_cleanup() - clean up dump_segments list
+ * @rproc: the remote processor handle
+ */
+static void rproc_coredump_cleanup(struct rproc *rproc)
+{
+	struct rproc_dump_segment *entry, *tmp;
+
+	list_for_each_entry_safe(entry, tmp, &rproc->dump_segments, node) {
+		list_del(&entry->node);
+		kfree(entry);
+	}
+}
+
+/**
+ * rproc_resource_cleanup() - clean up and free all acquired resources
+ * @rproc: rproc handle
+ *
+ * This function will free all resources acquired for @rproc, and it
+ * is called whenever @rproc either shuts down or fails to boot.
+ */
+static void rproc_resource_cleanup(struct rproc *rproc)
+{
+	struct rproc_mem_entry *entry, *tmp;
+	struct rproc_vdev *rvdev, *rvtmp;
+	struct device *dev = &rproc->dev;
+
+	/* clean up debugfs trace entries */
+	list_for_each_entry_safe(entry, tmp, &rproc->traces, node) {
+		rproc_remove_trace_file(entry->priv);
+		rproc->num_traces--;
+		list_del(&entry->node);
+		kfree(entry);
+	}
+
+	/* clean up iommu mapping entries */
+	list_for_each_entry_safe(entry, tmp, &rproc->mappings, node) {
+		size_t unmapped;
+
+		unmapped = iommu_unmap(rproc->domain, entry->da, entry->len);
+		if (unmapped != entry->len) {
+			/* nothing much to do besides complaining */
+			dev_err(dev, "failed to unmap %u/%zu\n", entry->len,
+				unmapped);
+		}
+
+		list_del(&entry->node);
+		kfree(entry);
+	}
+
+	/* clean up carveout allocations */
+	list_for_each_entry_safe(entry, tmp, &rproc->carveouts, node) {
+		dma_free_coherent(dev->parent, entry->len, entry->va,
+				  entry->dma);
+		list_del(&entry->node);
+		kfree(entry);
+	}
+
+	/* clean up remote vdev entries */
+	list_for_each_entry_safe(rvdev, rvtmp, &rproc->rvdevs, node)
+		kref_put(&rvdev->refcount, rproc_vdev_release);
+
+	rproc_coredump_cleanup(rproc);
+}
+
+static int rproc_start(struct rproc *rproc, const struct firmware *fw)
+{
+	struct resource_table *loaded_table;
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	/* load the ELF segments to memory */
+	ret = rproc_load_segments(rproc, fw);
+	if (ret) {
+		dev_err(dev, "Failed to load program segments: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * The starting device has been given the rproc->cached_table as the
+	 * resource table. The address of the vring along with the other
+	 * allocated resources (carveouts etc) is stored in cached_table.
+	 * In order to pass this information to the remote device we must copy
+	 * this information to device memory. We also update the table_ptr so
+	 * that any subsequent changes will be applied to the loaded version.
+	 */
+	loaded_table = rproc_find_loaded_rsc_table(rproc, fw);
+	if (loaded_table) {
+		memcpy(loaded_table, rproc->cached_table, rproc->table_sz);
+		rproc->table_ptr = loaded_table;
+	}
+
+	ret = rproc_prepare_subdevices(rproc);
+	if (ret) {
+		dev_err(dev, "failed to prepare subdevices for %s: %d\n",
+			rproc->name, ret);
+		goto reset_table_ptr;
+	}
+
+	/* power up the remote processor */
+	ret = rproc->ops->start(rproc);
+	if (ret) {
+		dev_err(dev, "can't start rproc %s: %d\n", rproc->name, ret);
+		goto unprepare_subdevices;
+	}
+
+	/* Start any subdevices for the remote processor */
+	ret = rproc_start_subdevices(rproc);
+	if (ret) {
+		dev_err(dev, "failed to probe subdevices for %s: %d\n",
+			rproc->name, ret);
+		goto stop_rproc;
+	}
+
+	rproc->state = RPROC_RUNNING;
+
+	dev_info(dev, "remote processor %s is now up\n", rproc->name);
+
+	return 0;
+
+stop_rproc:
+	rproc->ops->stop(rproc);
+unprepare_subdevices:
+	rproc_unprepare_subdevices(rproc);
+reset_table_ptr:
+	rproc->table_ptr = rproc->cached_table;
+
+	return ret;
+}
+
+/*
+ * take a firmware and boot a remote processor with it.
+ */
+static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
+{
+	struct device *dev = &rproc->dev;
+	const char *name = rproc->firmware;
+	int ret;
+
+	ret = rproc_fw_sanity_check(rproc, fw);
+	if (ret)
+		return ret;
+
+	dev_info(dev, "Booting fw image %s, size %zd\n", name, fw->size);
+
+	/*
+	 * if enabling an IOMMU isn't relevant for this rproc, this is
+	 * just a nop
+	 */
+	ret = rproc_enable_iommu(rproc);
+	if (ret) {
+		dev_err(dev, "can't enable iommu: %d\n", ret);
+		return ret;
+	}
+
+	rproc->bootaddr = rproc_get_boot_addr(rproc, fw);
+
+	/* Load resource table, core dump segment list etc from the firmware */
+	ret = rproc_parse_fw(rproc, fw);
+	if (ret)
+		goto disable_iommu;
+
+	/* reset max_notifyid */
+	rproc->max_notifyid = -1;
+
+	/* handle fw resources which are required to boot rproc */
+	ret = rproc_handle_resources(rproc, rproc_loading_handlers);
+	if (ret) {
+		dev_err(dev, "Failed to process resources: %d\n", ret);
+		goto clean_up_resources;
+	}
+
+	ret = rproc_start(rproc, fw);
+	if (ret)
+		goto clean_up_resources;
+
+	return 0;
+
+clean_up_resources:
+	rproc_resource_cleanup(rproc);
+	kfree(rproc->cached_table);
+	rproc->cached_table = NULL;
+	rproc->table_ptr = NULL;
+disable_iommu:
+	rproc_disable_iommu(rproc);
+	return ret;
+}
+
+/*
+ * take a firmware and boot it up.
+ *
+ * Note: this function is called asynchronously upon registration of the
+ * remote processor (so we must wait until it completes before we try
+ * to unregister the device. one other option is just to use kref here,
+ * that might be cleaner).
+ */
+static void rproc_auto_boot_callback(const struct firmware *fw, void *context)
+{
+	struct rproc *rproc = context;
+
+	rproc_boot(rproc);
+
+	release_firmware(fw);
+}
+
+static int rproc_trigger_auto_boot(struct rproc *rproc)
+{
+	int ret;
+
+	/*
+	 * We're initiating an asynchronous firmware loading, so we can
+	 * be built-in kernel code, without hanging the boot process.
+	 */
+	ret = request_firmware_nowait(THIS_MODULE, FW_ACTION_HOTPLUG,
+				      rproc->firmware, &rproc->dev, GFP_KERNEL,
+				      rproc, rproc_auto_boot_callback);
+	if (ret < 0)
+		dev_err(&rproc->dev, "request_firmware_nowait err: %d\n", ret);
+
+	return ret;
+}
+
+static int rproc_stop(struct rproc *rproc, bool crashed)
+{
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	/* Stop any subdevices for the remote processor */
+	rproc_stop_subdevices(rproc, crashed);
+
+	/* the installed resource table is no longer accessible */
+	rproc->table_ptr = rproc->cached_table;
+
+	/* power off the remote processor */
+	ret = rproc->ops->stop(rproc);
+	if (ret) {
+		dev_err(dev, "can't stop rproc: %d\n", ret);
+		return ret;
+	}
+
+	rproc_unprepare_subdevices(rproc);
+
+	rproc->state = RPROC_OFFLINE;
+
+	dev_info(dev, "stopped remote processor %s\n", rproc->name);
+
+	return 0;
+}
+
+/**
+ * rproc_coredump_add_segment() - add segment of device memory to coredump
+ * @rproc:	handle of a remote processor
+ * @da:		device address
+ * @size:	size of segment
+ *
+ * Add device memory to the list of segments to be included in a coredump for
+ * the remoteproc.
+ *
+ * Return: 0 on success, negative errno on error.
+ */
+int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size)
+{
+	struct rproc_dump_segment *segment;
+
+	segment = kzalloc(sizeof(*segment), GFP_KERNEL);
+	if (!segment)
+		return -ENOMEM;
+
+	segment->da = da;
+	segment->size = size;
+
+	list_add_tail(&segment->node, &rproc->dump_segments);
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_coredump_add_segment);
+
+/**
+ * rproc_coredump() - perform coredump
+ * @rproc:	rproc handle
+ *
+ * This function will generate an ELF header for the registered segments
+ * and create a devcoredump device associated with rproc.
+ */
+static void rproc_coredump(struct rproc *rproc)
+{
+	struct rproc_dump_segment *segment;
+	struct elf32_phdr *phdr;
+	struct elf32_hdr *ehdr;
+	size_t data_size;
+	size_t offset;
+	void *data;
+	void *ptr;
+	int phnum = 0;
+
+	if (list_empty(&rproc->dump_segments))
+		return;
+
+	data_size = sizeof(*ehdr);
+	list_for_each_entry(segment, &rproc->dump_segments, node) {
+		data_size += sizeof(*phdr) + segment->size;
+
+		phnum++;
+	}
+
+	data = vmalloc(data_size);
+	if (!data)
+		return;
+
+	ehdr = data;
+
+	memset(ehdr, 0, sizeof(*ehdr));
+	memcpy(ehdr->e_ident, ELFMAG, SELFMAG);
+	ehdr->e_ident[EI_CLASS] = ELFCLASS32;
+	ehdr->e_ident[EI_DATA] = ELFDATA2LSB;
+	ehdr->e_ident[EI_VERSION] = EV_CURRENT;
+	ehdr->e_ident[EI_OSABI] = ELFOSABI_NONE;
+	ehdr->e_type = ET_CORE;
+	ehdr->e_machine = EM_NONE;
+	ehdr->e_version = EV_CURRENT;
+	ehdr->e_entry = rproc->bootaddr;
+	ehdr->e_phoff = sizeof(*ehdr);
+	ehdr->e_ehsize = sizeof(*ehdr);
+	ehdr->e_phentsize = sizeof(*phdr);
+	ehdr->e_phnum = phnum;
+
+	phdr = data + ehdr->e_phoff;
+	offset = ehdr->e_phoff + sizeof(*phdr) * ehdr->e_phnum;
+	list_for_each_entry(segment, &rproc->dump_segments, node) {
+		memset(phdr, 0, sizeof(*phdr));
+		phdr->p_type = PT_LOAD;
+		phdr->p_offset = offset;
+		phdr->p_vaddr = segment->da;
+		phdr->p_paddr = segment->da;
+		phdr->p_filesz = segment->size;
+		phdr->p_memsz = segment->size;
+		phdr->p_flags = PF_R | PF_W | PF_X;
+		phdr->p_align = 0;
+
+		ptr = rproc_da_to_va(rproc, segment->da, segment->size);
+		if (!ptr) {
+			dev_err(&rproc->dev,
+				"invalid coredump segment (%pad, %zu)\n",
+				&segment->da, segment->size);
+			memset(data + offset, 0xff, segment->size);
+		} else {
+			memcpy(data + offset, ptr, segment->size);
+		}
+
+		offset += phdr->p_filesz;
+		phdr++;
+	}
+
+	dev_coredumpv(&rproc->dev, data, data_size, GFP_KERNEL);
+}
+
+/**
+ * rproc_trigger_recovery() - recover a remoteproc
+ * @rproc: the remote processor
+ *
+ * The recovery is done by resetting all the virtio devices, that way all the
+ * rpmsg drivers will be reseted along with the remote processor making the
+ * remoteproc functional again.
+ *
+ * This function can sleep, so it cannot be called from atomic context.
+ */
+int rproc_trigger_recovery(struct rproc *rproc)
+{
+	const struct firmware *firmware_p;
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	dev_err(dev, "recovering %s\n", rproc->name);
+
+	ret = mutex_lock_interruptible(&rproc->lock);
+	if (ret)
+		return ret;
+
+	ret = rproc_stop(rproc, true);
+	if (ret)
+		goto unlock_mutex;
+
+	/* generate coredump */
+	rproc_coredump(rproc);
+
+	/* load firmware */
+	ret = request_firmware(&firmware_p, rproc->firmware, dev);
+	if (ret < 0) {
+		dev_err(dev, "request_firmware failed: %d\n", ret);
+		goto unlock_mutex;
+	}
+
+	/* boot the remote processor up again */
+	ret = rproc_start(rproc, firmware_p);
+
+	release_firmware(firmware_p);
+
+unlock_mutex:
+	mutex_unlock(&rproc->lock);
+	return ret;
+}
+
+/**
+ * rproc_crash_handler_work() - handle a crash
+ *
+ * This function needs to handle everything related to a crash, like cpu
+ * registers and stack dump, information to help to debug the fatal error, etc.
+ */
+static void rproc_crash_handler_work(struct work_struct *work)
+{
+	struct rproc *rproc = container_of(work, struct rproc, crash_handler);
+	struct device *dev = &rproc->dev;
+
+	dev_dbg(dev, "enter %s\n", __func__);
+
+	mutex_lock(&rproc->lock);
+
+	if (rproc->state == RPROC_CRASHED || rproc->state == RPROC_OFFLINE) {
+		/* handle only the first crash detected */
+		mutex_unlock(&rproc->lock);
+		return;
+	}
+
+	rproc->state = RPROC_CRASHED;
+	dev_err(dev, "handling crash #%u in %s\n", ++rproc->crash_cnt,
+		rproc->name);
+
+	mutex_unlock(&rproc->lock);
+
+	if (!rproc->recovery_disabled)
+		rproc_trigger_recovery(rproc);
+}
+
+/**
+ * rproc_boot() - boot a remote processor
+ * @rproc: handle of a remote processor
+ *
+ * Boot a remote processor (i.e. load its firmware, power it on, ...).
+ *
+ * If the remote processor is already powered on, this function immediately
+ * returns (successfully).
+ *
+ * Returns 0 on success, and an appropriate error value otherwise.
+ */
+int rproc_boot(struct rproc *rproc)
+{
+	const struct firmware *firmware_p;
+	struct device *dev;
+	int ret;
+
+	if (!rproc) {
+		pr_err("invalid rproc handle\n");
+		return -EINVAL;
+	}
+
+	dev = &rproc->dev;
+
+	ret = mutex_lock_interruptible(&rproc->lock);
+	if (ret) {
+		dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret);
+		return ret;
+	}
+
+	if (rproc->state == RPROC_DELETED) {
+		ret = -ENODEV;
+		dev_err(dev, "can't boot deleted rproc %s\n", rproc->name);
+		goto unlock_mutex;
+	}
+
+	/* skip the boot process if rproc is already powered up */
+	if (atomic_inc_return(&rproc->power) > 1) {
+		ret = 0;
+		goto unlock_mutex;
+	}
+
+	dev_info(dev, "powering up %s\n", rproc->name);
+
+	/* load firmware */
+	ret = request_firmware(&firmware_p, rproc->firmware, dev);
+	if (ret < 0) {
+		dev_err(dev, "request_firmware failed: %d\n", ret);
+		goto downref_rproc;
+	}
+
+	ret = rproc_fw_boot(rproc, firmware_p);
+
+	release_firmware(firmware_p);
+
+downref_rproc:
+	if (ret)
+		atomic_dec(&rproc->power);
+unlock_mutex:
+	mutex_unlock(&rproc->lock);
+	return ret;
+}
+EXPORT_SYMBOL(rproc_boot);
+
+/**
+ * rproc_shutdown() - power off the remote processor
+ * @rproc: the remote processor
+ *
+ * Power off a remote processor (previously booted with rproc_boot()).
+ *
+ * In case @rproc is still being used by an additional user(s), then
+ * this function will just decrement the power refcount and exit,
+ * without really powering off the device.
+ *
+ * Every call to rproc_boot() must (eventually) be accompanied by a call
+ * to rproc_shutdown(). Calling rproc_shutdown() redundantly is a bug.
+ *
+ * Notes:
+ * - we're not decrementing the rproc's refcount, only the power refcount.
+ *   which means that the @rproc handle stays valid even after rproc_shutdown()
+ *   returns, and users can still use it with a subsequent rproc_boot(), if
+ *   needed.
+ */
+void rproc_shutdown(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	ret = mutex_lock_interruptible(&rproc->lock);
+	if (ret) {
+		dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, ret);
+		return;
+	}
+
+	/* if the remote proc is still needed, bail out */
+	if (!atomic_dec_and_test(&rproc->power))
+		goto out;
+
+	ret = rproc_stop(rproc, false);
+	if (ret) {
+		atomic_inc(&rproc->power);
+		goto out;
+	}
+
+	/* clean up all acquired resources */
+	rproc_resource_cleanup(rproc);
+
+	rproc_disable_iommu(rproc);
+
+	/* Free the copy of the resource table */
+	kfree(rproc->cached_table);
+	rproc->cached_table = NULL;
+	rproc->table_ptr = NULL;
+out:
+	mutex_unlock(&rproc->lock);
+}
+EXPORT_SYMBOL(rproc_shutdown);
+
+/**
+ * rproc_get_by_phandle() - find a remote processor by phandle
+ * @phandle: phandle to the rproc
+ *
+ * Finds an rproc handle using the remote processor's phandle, and then
+ * return a handle to the rproc.
+ *
+ * This function increments the remote processor's refcount, so always
+ * use rproc_put() to decrement it back once rproc isn't needed anymore.
+ *
+ * Returns the rproc handle on success, and NULL on failure.
+ */
+#ifdef CONFIG_OF
+struct rproc *rproc_get_by_phandle(phandle phandle)
+{
+	struct rproc *rproc = NULL, *r;
+	struct device_node *np;
+
+	np = of_find_node_by_phandle(phandle);
+	if (!np)
+		return NULL;
+
+	mutex_lock(&rproc_list_mutex);
+	list_for_each_entry(r, &rproc_list, node) {
+		if (r->dev.parent && r->dev.parent->of_node == np) {
+			/* prevent underlying implementation from being removed */
+			if (!try_module_get(r->dev.parent->driver->owner)) {
+				dev_err(&r->dev, "can't get owner\n");
+				break;
+			}
+
+			rproc = r;
+			get_device(&rproc->dev);
+			break;
+		}
+	}
+	mutex_unlock(&rproc_list_mutex);
+
+	of_node_put(np);
+
+	return rproc;
+}
+#else
+struct rproc *rproc_get_by_phandle(phandle phandle)
+{
+	return NULL;
+}
+#endif
+EXPORT_SYMBOL(rproc_get_by_phandle);
+
+/**
+ * rproc_add() - register a remote processor
+ * @rproc: the remote processor handle to register
+ *
+ * Registers @rproc with the remoteproc framework, after it has been
+ * allocated with rproc_alloc().
+ *
+ * This is called by the platform-specific rproc implementation, whenever
+ * a new remote processor device is probed.
+ *
+ * Returns 0 on success and an appropriate error code otherwise.
+ *
+ * Note: this function initiates an asynchronous firmware loading
+ * context, which will look for virtio devices supported by the rproc's
+ * firmware.
+ *
+ * If found, those virtio devices will be created and added, so as a result
+ * of registering this remote processor, additional virtio drivers might be
+ * probed.
+ */
+int rproc_add(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	int ret;
+
+	ret = device_add(dev);
+	if (ret < 0)
+		return ret;
+
+	dev_info(dev, "%s is available\n", rproc->name);
+
+	/* create debugfs entries */
+	rproc_create_debug_dir(rproc);
+
+	/* if rproc is marked always-on, request it to boot */
+	if (rproc->auto_boot) {
+		ret = rproc_trigger_auto_boot(rproc);
+		if (ret < 0)
+			return ret;
+	}
+
+	/* expose to rproc_get_by_phandle users */
+	mutex_lock(&rproc_list_mutex);
+	list_add(&rproc->node, &rproc_list);
+	mutex_unlock(&rproc_list_mutex);
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_add);
+
+/**
+ * rproc_type_release() - release a remote processor instance
+ * @dev: the rproc's device
+ *
+ * This function should _never_ be called directly.
+ *
+ * It will be called by the driver core when no one holds a valid pointer
+ * to @dev anymore.
+ */
+static void rproc_type_release(struct device *dev)
+{
+	struct rproc *rproc = container_of(dev, struct rproc, dev);
+
+	dev_info(&rproc->dev, "releasing %s\n", rproc->name);
+
+	idr_destroy(&rproc->notifyids);
+
+	if (rproc->index >= 0)
+		ida_simple_remove(&rproc_dev_index, rproc->index);
+
+	kfree(rproc->firmware);
+	kfree(rproc->ops);
+	kfree(rproc);
+}
+
+static const struct device_type rproc_type = {
+	.name		= "remoteproc",
+	.release	= rproc_type_release,
+};
+
+/**
+ * rproc_alloc() - allocate a remote processor handle
+ * @dev: the underlying device
+ * @name: name of this remote processor
+ * @ops: platform-specific handlers (mainly start/stop)
+ * @firmware: name of firmware file to load, can be NULL
+ * @len: length of private data needed by the rproc driver (in bytes)
+ *
+ * Allocates a new remote processor handle, but does not register
+ * it yet. if @firmware is NULL, a default name is used.
+ *
+ * This function should be used by rproc implementations during initialization
+ * of the remote processor.
+ *
+ * After creating an rproc handle using this function, and when ready,
+ * implementations should then call rproc_add() to complete
+ * the registration of the remote processor.
+ *
+ * On success the new rproc is returned, and on failure, NULL.
+ *
+ * Note: _never_ directly deallocate @rproc, even if it was not registered
+ * yet. Instead, when you need to unroll rproc_alloc(), use rproc_free().
+ */
+struct rproc *rproc_alloc(struct device *dev, const char *name,
+			  const struct rproc_ops *ops,
+			  const char *firmware, int len)
+{
+	struct rproc *rproc;
+	char *p, *template = "rproc-%s-fw";
+	int name_len;
+
+	if (!dev || !name || !ops)
+		return NULL;
+
+	if (!firmware) {
+		/*
+		 * If the caller didn't pass in a firmware name then
+		 * construct a default name.
+		 */
+		name_len = strlen(name) + strlen(template) - 2 + 1;
+		p = kmalloc(name_len, GFP_KERNEL);
+		if (!p)
+			return NULL;
+		snprintf(p, name_len, template, name);
+	} else {
+		p = kstrdup(firmware, GFP_KERNEL);
+		if (!p)
+			return NULL;
+	}
+
+	rproc = kzalloc(sizeof(struct rproc) + len, GFP_KERNEL);
+	if (!rproc) {
+		kfree(p);
+		return NULL;
+	}
+
+	rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
+	if (!rproc->ops) {
+		kfree(p);
+		kfree(rproc);
+		return NULL;
+	}
+
+	rproc->firmware = p;
+	rproc->name = name;
+	rproc->priv = &rproc[1];
+	rproc->auto_boot = true;
+
+	device_initialize(&rproc->dev);
+	rproc->dev.parent = dev;
+	rproc->dev.type = &rproc_type;
+	rproc->dev.class = &rproc_class;
+	rproc->dev.driver_data = rproc;
+	idr_init(&rproc->notifyids);
+
+	/* Assign a unique device index and name */
+	rproc->index = ida_simple_get(&rproc_dev_index, 0, 0, GFP_KERNEL);
+	if (rproc->index < 0) {
+		dev_err(dev, "ida_simple_get failed: %d\n", rproc->index);
+		put_device(&rproc->dev);
+		return NULL;
+	}
+
+	dev_set_name(&rproc->dev, "remoteproc%d", rproc->index);
+
+	atomic_set(&rproc->power, 0);
+
+	/* Default to ELF loader if no load function is specified */
+	if (!rproc->ops->load) {
+		rproc->ops->load = rproc_elf_load_segments;
+		rproc->ops->parse_fw = rproc_elf_load_rsc_table;
+		rproc->ops->find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table;
+		rproc->ops->sanity_check = rproc_elf_sanity_check;
+		rproc->ops->get_boot_addr = rproc_elf_get_boot_addr;
+	}
+
+	mutex_init(&rproc->lock);
+
+	INIT_LIST_HEAD(&rproc->carveouts);
+	INIT_LIST_HEAD(&rproc->mappings);
+	INIT_LIST_HEAD(&rproc->traces);
+	INIT_LIST_HEAD(&rproc->rvdevs);
+	INIT_LIST_HEAD(&rproc->subdevs);
+	INIT_LIST_HEAD(&rproc->dump_segments);
+
+	INIT_WORK(&rproc->crash_handler, rproc_crash_handler_work);
+
+	rproc->state = RPROC_OFFLINE;
+
+	return rproc;
+}
+EXPORT_SYMBOL(rproc_alloc);
+
+/**
+ * rproc_free() - unroll rproc_alloc()
+ * @rproc: the remote processor handle
+ *
+ * This function decrements the rproc dev refcount.
+ *
+ * If no one holds any reference to rproc anymore, then its refcount would
+ * now drop to zero, and it would be freed.
+ */
+void rproc_free(struct rproc *rproc)
+{
+	put_device(&rproc->dev);
+}
+EXPORT_SYMBOL(rproc_free);
+
+/**
+ * rproc_put() - release rproc reference
+ * @rproc: the remote processor handle
+ *
+ * This function decrements the rproc dev refcount.
+ *
+ * If no one holds any reference to rproc anymore, then its refcount would
+ * now drop to zero, and it would be freed.
+ */
+void rproc_put(struct rproc *rproc)
+{
+	module_put(rproc->dev.parent->driver->owner);
+	put_device(&rproc->dev);
+}
+EXPORT_SYMBOL(rproc_put);
+
+/**
+ * rproc_del() - unregister a remote processor
+ * @rproc: rproc handle to unregister
+ *
+ * This function should be called when the platform specific rproc
+ * implementation decides to remove the rproc device. it should
+ * _only_ be called if a previous invocation of rproc_add()
+ * has completed successfully.
+ *
+ * After rproc_del() returns, @rproc isn't freed yet, because
+ * of the outstanding reference created by rproc_alloc. To decrement that
+ * one last refcount, one still needs to call rproc_free().
+ *
+ * Returns 0 on success and -EINVAL if @rproc isn't valid.
+ */
+int rproc_del(struct rproc *rproc)
+{
+	if (!rproc)
+		return -EINVAL;
+
+	/* if rproc is marked always-on, rproc_add() booted it */
+	/* TODO: make sure this works with rproc->power > 1 */
+	if (rproc->auto_boot)
+		rproc_shutdown(rproc);
+
+	mutex_lock(&rproc->lock);
+	rproc->state = RPROC_DELETED;
+	mutex_unlock(&rproc->lock);
+
+	rproc_delete_debug_dir(rproc);
+
+	/* the rproc is downref'ed as soon as it's removed from the klist */
+	mutex_lock(&rproc_list_mutex);
+	list_del(&rproc->node);
+	mutex_unlock(&rproc_list_mutex);
+
+	device_del(&rproc->dev);
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_del);
+
+/**
+ * rproc_add_subdev() - add a subdevice to a remoteproc
+ * @rproc: rproc handle to add the subdevice to
+ * @subdev: subdev handle to register
+ *
+ * Caller is responsible for populating optional subdevice function pointers.
+ */
+void rproc_add_subdev(struct rproc *rproc, struct rproc_subdev *subdev)
+{
+	list_add_tail(&subdev->node, &rproc->subdevs);
+}
+EXPORT_SYMBOL(rproc_add_subdev);
+
+/**
+ * rproc_remove_subdev() - remove a subdevice from a remoteproc
+ * @rproc: rproc handle to remove the subdevice from
+ * @subdev: subdev handle, previously registered with rproc_add_subdev()
+ */
+void rproc_remove_subdev(struct rproc *rproc, struct rproc_subdev *subdev)
+{
+	list_del(&subdev->node);
+}
+EXPORT_SYMBOL(rproc_remove_subdev);
+
+/**
+ * rproc_get_by_child() - acquire rproc handle of @dev's ancestor
+ * @dev:	child device to find ancestor of
+ *
+ * Returns the ancestor rproc instance, or NULL if not found.
+ */
+struct rproc *rproc_get_by_child(struct device *dev)
+{
+	for (dev = dev->parent; dev; dev = dev->parent) {
+		if (dev->type == &rproc_type)
+			return dev->driver_data;
+	}
+
+	return NULL;
+}
+EXPORT_SYMBOL(rproc_get_by_child);
+
+/**
+ * rproc_report_crash() - rproc crash reporter function
+ * @rproc: remote processor
+ * @type: crash type
+ *
+ * This function must be called every time a crash is detected by the low-level
+ * drivers implementing a specific remoteproc. This should not be called from a
+ * non-remoteproc driver.
+ *
+ * This function can be called from atomic/interrupt context.
+ */
+void rproc_report_crash(struct rproc *rproc, enum rproc_crash_type type)
+{
+	if (!rproc) {
+		pr_err("NULL rproc pointer\n");
+		return;
+	}
+
+	dev_err(&rproc->dev, "crash detected in %s: type %s\n",
+		rproc->name, rproc_crash_to_string(type));
+
+	/* create a new task to handle the error */
+	schedule_work(&rproc->crash_handler);
+}
+EXPORT_SYMBOL(rproc_report_crash);
+
+static int __init remoteproc_init(void)
+{
+	rproc_init_sysfs();
+	rproc_init_debugfs();
+
+	return 0;
+}
+subsys_initcall(remoteproc_init);
+
+static void __exit remoteproc_exit(void)
+{
+	ida_destroy(&rproc_dev_index);
+
+	rproc_exit_debugfs();
+	rproc_exit_sysfs();
+}
+module_exit(remoteproc_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Generic Remote Processor Framework");
diff --git a/drivers/remoteproc/remoteproc_debugfs.c b/drivers/remoteproc/remoteproc_debugfs.c
new file mode 100644
index 000000000..a5c29f276
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_debugfs.c
@@ -0,0 +1,345 @@
+/*
+ * Remote Processor Framework
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Mark Grosen <mgrosen@ti.com>
+ * Brian Swetland <swetland@google.com>
+ * Fernando Guzman Lugo <fernando.lugo@ti.com>
+ * Suman Anna <s-anna@ti.com>
+ * Robert Tivy <rtivy@ti.com>
+ * Armando Uribe De Leon <x0095078@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 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.
+ */
+
+#define pr_fmt(fmt)    "%s: " fmt, __func__
+
+#include <linux/kernel.h>
+#include <linux/debugfs.h>
+#include <linux/remoteproc.h>
+#include <linux/device.h>
+#include <linux/uaccess.h>
+
+#include "remoteproc_internal.h"
+
+/* remoteproc debugfs parent dir */
+static struct dentry *rproc_dbg;
+
+/*
+ * Some remote processors may support dumping trace logs into a shared
+ * memory buffer. We expose this trace buffer using debugfs, so users
+ * can easily tell what's going on remotely.
+ *
+ * We will most probably improve the rproc tracing facilities later on,
+ * but this kind of lightweight and simple mechanism is always good to have,
+ * as it provides very early tracing with little to no dependencies at all.
+ */
+static ssize_t rproc_trace_read(struct file *filp, char __user *userbuf,
+				size_t count, loff_t *ppos)
+{
+	struct rproc_mem_entry *trace = filp->private_data;
+	int len = strnlen(trace->va, trace->len);
+
+	return simple_read_from_buffer(userbuf, count, ppos, trace->va, len);
+}
+
+static const struct file_operations trace_rproc_ops = {
+	.read = rproc_trace_read,
+	.open = simple_open,
+	.llseek	= generic_file_llseek,
+};
+
+/* expose the name of the remote processor via debugfs */
+static ssize_t rproc_name_read(struct file *filp, char __user *userbuf,
+			       size_t count, loff_t *ppos)
+{
+	struct rproc *rproc = filp->private_data;
+	/* need room for the name, a newline and a terminating null */
+	char buf[100];
+	int i;
+
+	i = scnprintf(buf, sizeof(buf), "%.98s\n", rproc->name);
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, i);
+}
+
+static const struct file_operations rproc_name_ops = {
+	.read = rproc_name_read,
+	.open = simple_open,
+	.llseek	= generic_file_llseek,
+};
+
+/* expose recovery flag via debugfs */
+static ssize_t rproc_recovery_read(struct file *filp, char __user *userbuf,
+				   size_t count, loff_t *ppos)
+{
+	struct rproc *rproc = filp->private_data;
+	char *buf = rproc->recovery_disabled ? "disabled\n" : "enabled\n";
+
+	return simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
+}
+
+/*
+ * By writing to the 'recovery' debugfs entry, we control the behavior of the
+ * recovery mechanism dynamically. The default value of this entry is "enabled".
+ *
+ * The 'recovery' debugfs entry supports these commands:
+ *
+ * enabled:	When enabled, the remote processor will be automatically
+ *		recovered whenever it crashes. Moreover, if the remote
+ *		processor crashes while recovery is disabled, it will
+ *		be automatically recovered too as soon as recovery is enabled.
+ *
+ * disabled:	When disabled, a remote processor will remain in a crashed
+ *		state if it crashes. This is useful for debugging purposes;
+ *		without it, debugging a crash is substantially harder.
+ *
+ * recover:	This function will trigger an immediate recovery if the
+ *		remote processor is in a crashed state, without changing
+ *		or checking the recovery state (enabled/disabled).
+ *		This is useful during debugging sessions, when one expects
+ *		additional crashes to happen after enabling recovery. In this
+ *		case, enabling recovery will make it hard to debug subsequent
+ *		crashes, so it's recommended to keep recovery disabled, and
+ *		instead use the "recover" command as needed.
+ */
+static ssize_t
+rproc_recovery_write(struct file *filp, const char __user *user_buf,
+		     size_t count, loff_t *ppos)
+{
+	struct rproc *rproc = filp->private_data;
+	char buf[10];
+	int ret;
+
+	if (count < 1 || count > sizeof(buf))
+		return -EINVAL;
+
+	ret = copy_from_user(buf, user_buf, count);
+	if (ret)
+		return -EFAULT;
+
+	/* remove end of line */
+	if (buf[count - 1] == '\n')
+		buf[count - 1] = '\0';
+
+	if (!strncmp(buf, "enabled", count)) {
+		rproc->recovery_disabled = false;
+		/* if rproc has crashed, trigger recovery */
+		if (rproc->state == RPROC_CRASHED)
+			rproc_trigger_recovery(rproc);
+	} else if (!strncmp(buf, "disabled", count)) {
+		rproc->recovery_disabled = true;
+	} else if (!strncmp(buf, "recover", count)) {
+		/* if rproc has crashed, trigger recovery */
+		if (rproc->state == RPROC_CRASHED)
+			rproc_trigger_recovery(rproc);
+	}
+
+	return count;
+}
+
+static const struct file_operations rproc_recovery_ops = {
+	.read = rproc_recovery_read,
+	.write = rproc_recovery_write,
+	.open = simple_open,
+	.llseek = generic_file_llseek,
+};
+
+/* Expose resource table content via debugfs */
+static int rproc_rsc_table_show(struct seq_file *seq, void *p)
+{
+	static const char * const types[] = {"carveout", "devmem", "trace", "vdev"};
+	struct rproc *rproc = seq->private;
+	struct resource_table *table = rproc->table_ptr;
+	struct fw_rsc_carveout *c;
+	struct fw_rsc_devmem *d;
+	struct fw_rsc_trace *t;
+	struct fw_rsc_vdev *v;
+	int i, j;
+
+	if (!table) {
+		seq_puts(seq, "No resource table found\n");
+		return 0;
+	}
+
+	for (i = 0; i < table->num; i++) {
+		int offset = table->offset[i];
+		struct fw_rsc_hdr *hdr = (void *)table + offset;
+		void *rsc = (void *)hdr + sizeof(*hdr);
+
+		switch (hdr->type) {
+		case RSC_CARVEOUT:
+			c = rsc;
+			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+			seq_printf(seq, "  Device Address 0x%x\n", c->da);
+			seq_printf(seq, "  Physical Address 0x%x\n", c->pa);
+			seq_printf(seq, "  Length 0x%x Bytes\n", c->len);
+			seq_printf(seq, "  Flags 0x%x\n", c->flags);
+			seq_printf(seq, "  Reserved (should be zero) [%d]\n", c->reserved);
+			seq_printf(seq, "  Name %s\n\n", c->name);
+			break;
+		case RSC_DEVMEM:
+			d = rsc;
+			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+			seq_printf(seq, "  Device Address 0x%x\n", d->da);
+			seq_printf(seq, "  Physical Address 0x%x\n", d->pa);
+			seq_printf(seq, "  Length 0x%x Bytes\n", d->len);
+			seq_printf(seq, "  Flags 0x%x\n", d->flags);
+			seq_printf(seq, "  Reserved (should be zero) [%d]\n", d->reserved);
+			seq_printf(seq, "  Name %s\n\n", d->name);
+			break;
+		case RSC_TRACE:
+			t = rsc;
+			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+			seq_printf(seq, "  Device Address 0x%x\n", t->da);
+			seq_printf(seq, "  Length 0x%x Bytes\n", t->len);
+			seq_printf(seq, "  Reserved (should be zero) [%d]\n", t->reserved);
+			seq_printf(seq, "  Name %s\n\n", t->name);
+			break;
+		case RSC_VDEV:
+			v = rsc;
+			seq_printf(seq, "Entry %d is of type %s\n", i, types[hdr->type]);
+
+			seq_printf(seq, "  ID %d\n", v->id);
+			seq_printf(seq, "  Notify ID %d\n", v->notifyid);
+			seq_printf(seq, "  Device features 0x%x\n", v->dfeatures);
+			seq_printf(seq, "  Guest features 0x%x\n", v->gfeatures);
+			seq_printf(seq, "  Config length 0x%x\n", v->config_len);
+			seq_printf(seq, "  Status 0x%x\n", v->status);
+			seq_printf(seq, "  Number of vrings %d\n", v->num_of_vrings);
+			seq_printf(seq, "  Reserved (should be zero) [%d][%d]\n\n",
+				   v->reserved[0], v->reserved[1]);
+
+			for (j = 0; j < v->num_of_vrings; j++) {
+				seq_printf(seq, "  Vring %d\n", j);
+				seq_printf(seq, "    Device Address 0x%x\n", v->vring[j].da);
+				seq_printf(seq, "    Alignment %d\n", v->vring[j].align);
+				seq_printf(seq, "    Number of buffers %d\n", v->vring[j].num);
+				seq_printf(seq, "    Notify ID %d\n", v->vring[j].notifyid);
+				seq_printf(seq, "    Physical Address 0x%x\n\n",
+					   v->vring[j].pa);
+			}
+			break;
+		default:
+			seq_printf(seq, "Unknown resource type found: %d [hdr: %pK]\n",
+				   hdr->type, hdr);
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static int rproc_rsc_table_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rproc_rsc_table_show, inode->i_private);
+}
+
+static const struct file_operations rproc_rsc_table_ops = {
+	.open		= rproc_rsc_table_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+/* Expose carveout content via debugfs */
+static int rproc_carveouts_show(struct seq_file *seq, void *p)
+{
+	struct rproc *rproc = seq->private;
+	struct rproc_mem_entry *carveout;
+
+	list_for_each_entry(carveout, &rproc->carveouts, node) {
+		seq_puts(seq, "Carveout memory entry:\n");
+		seq_printf(seq, "\tVirtual address: %pK\n", carveout->va);
+		seq_printf(seq, "\tDMA address: %pad\n", &carveout->dma);
+		seq_printf(seq, "\tDevice address: 0x%x\n", carveout->da);
+		seq_printf(seq, "\tLength: 0x%x Bytes\n\n", carveout->len);
+	}
+
+	return 0;
+}
+
+static int rproc_carveouts_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rproc_carveouts_show, inode->i_private);
+}
+
+static const struct file_operations rproc_carveouts_ops = {
+	.open		= rproc_carveouts_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+void rproc_remove_trace_file(struct dentry *tfile)
+{
+	debugfs_remove(tfile);
+}
+
+struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
+				       struct rproc_mem_entry *trace)
+{
+	struct dentry *tfile;
+
+	tfile = debugfs_create_file(name, 0400, rproc->dbg_dir, trace,
+				    &trace_rproc_ops);
+	if (!tfile) {
+		dev_err(&rproc->dev, "failed to create debugfs trace entry\n");
+		return NULL;
+	}
+
+	return tfile;
+}
+
+void rproc_delete_debug_dir(struct rproc *rproc)
+{
+	if (!rproc->dbg_dir)
+		return;
+
+	debugfs_remove_recursive(rproc->dbg_dir);
+}
+
+void rproc_create_debug_dir(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+
+	if (!rproc_dbg)
+		return;
+
+	rproc->dbg_dir = debugfs_create_dir(dev_name(dev), rproc_dbg);
+	if (!rproc->dbg_dir)
+		return;
+
+	debugfs_create_file("name", 0400, rproc->dbg_dir,
+			    rproc, &rproc_name_ops);
+	debugfs_create_file("recovery", 0400, rproc->dbg_dir,
+			    rproc, &rproc_recovery_ops);
+	debugfs_create_file("resource_table", 0400, rproc->dbg_dir,
+			    rproc, &rproc_rsc_table_ops);
+	debugfs_create_file("carveout_memories", 0400, rproc->dbg_dir,
+			    rproc, &rproc_carveouts_ops);
+}
+
+void __init rproc_init_debugfs(void)
+{
+	if (debugfs_initialized()) {
+		rproc_dbg = debugfs_create_dir(KBUILD_MODNAME, NULL);
+		if (!rproc_dbg)
+			pr_err("can't create debugfs dir\n");
+	}
+}
+
+void __exit rproc_exit_debugfs(void)
+{
+	debugfs_remove(rproc_dbg);
+}
diff --git a/drivers/remoteproc/remoteproc_elf_loader.c b/drivers/remoteproc/remoteproc_elf_loader.c
new file mode 100644
index 000000000..b17d72ec8
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_elf_loader.c
@@ -0,0 +1,338 @@
+/*
+ * Remote Processor Framework Elf loader
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ * Mark Grosen <mgrosen@ti.com>
+ * Fernando Guzman Lugo <fernando.lugo@ti.com>
+ * Suman Anna <s-anna@ti.com>
+ * Robert Tivy <rtivy@ti.com>
+ * Armando Uribe De Leon <x0095078@ti.com>
+ * Sjur Brændeland <sjur.brandeland@stericsson.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 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.
+ */
+
+#define pr_fmt(fmt)    "%s: " fmt, __func__
+
+#include <linux/module.h>
+#include <linux/firmware.h>
+#include <linux/remoteproc.h>
+#include <linux/elf.h>
+
+#include "remoteproc_internal.h"
+
+/**
+ * rproc_elf_sanity_check() - Sanity Check ELF firmware image
+ * @rproc: the remote processor handle
+ * @fw: the ELF firmware image
+ *
+ * Make sure this fw image is sane.
+ */
+int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw)
+{
+	const char *name = rproc->firmware;
+	struct device *dev = &rproc->dev;
+	struct elf32_hdr *ehdr;
+	char class;
+
+	if (!fw) {
+		dev_err(dev, "failed to load %s\n", name);
+		return -EINVAL;
+	}
+
+	if (fw->size < sizeof(struct elf32_hdr)) {
+		dev_err(dev, "Image is too small\n");
+		return -EINVAL;
+	}
+
+	ehdr = (struct elf32_hdr *)fw->data;
+
+	/* We only support ELF32 at this point */
+	class = ehdr->e_ident[EI_CLASS];
+	if (class != ELFCLASS32) {
+		dev_err(dev, "Unsupported class: %d\n", class);
+		return -EINVAL;
+	}
+
+	/* We assume the firmware has the same endianness as the host */
+# ifdef __LITTLE_ENDIAN
+	if (ehdr->e_ident[EI_DATA] != ELFDATA2LSB) {
+# else /* BIG ENDIAN */
+	if (ehdr->e_ident[EI_DATA] != ELFDATA2MSB) {
+# endif
+		dev_err(dev, "Unsupported firmware endianness\n");
+		return -EINVAL;
+	}
+
+	if (fw->size < ehdr->e_shoff + sizeof(struct elf32_shdr)) {
+		dev_err(dev, "Image is too small\n");
+		return -EINVAL;
+	}
+
+	if (memcmp(ehdr->e_ident, ELFMAG, SELFMAG)) {
+		dev_err(dev, "Image is corrupted (bad magic)\n");
+		return -EINVAL;
+	}
+
+	if (ehdr->e_phnum == 0) {
+		dev_err(dev, "No loadable segments\n");
+		return -EINVAL;
+	}
+
+	if (ehdr->e_phoff > fw->size) {
+		dev_err(dev, "Firmware size is too small\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_elf_sanity_check);
+
+/**
+ * rproc_elf_get_boot_addr() - Get rproc's boot address.
+ * @rproc: the remote processor handle
+ * @fw: the ELF firmware image
+ *
+ * This function returns the entry point address of the ELF
+ * image.
+ *
+ * Note that the boot address is not a configurable property of all remote
+ * processors. Some will always boot at a specific hard-coded address.
+ */
+u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
+{
+	struct elf32_hdr *ehdr  = (struct elf32_hdr *)fw->data;
+
+	return ehdr->e_entry;
+}
+EXPORT_SYMBOL(rproc_elf_get_boot_addr);
+
+/**
+ * rproc_elf_load_segments() - load firmware segments to memory
+ * @rproc: remote processor which will be booted using these fw segments
+ * @fw: the ELF firmware image
+ *
+ * This function loads the firmware segments to memory, where the remote
+ * processor expects them.
+ *
+ * Some remote processors will expect their code and data to be placed
+ * in specific device addresses, and can't have them dynamically assigned.
+ *
+ * We currently support only those kind of remote processors, and expect
+ * the program header's paddr member to contain those addresses. We then go
+ * through the physically contiguous "carveout" memory regions which we
+ * allocated (and mapped) earlier on behalf of the remote processor,
+ * and "translate" device address to kernel addresses, so we can copy the
+ * segments where they are expected.
+ *
+ * Currently we only support remote processors that required carveout
+ * allocations and got them mapped onto their iommus. Some processors
+ * might be different: they might not have iommus, and would prefer to
+ * directly allocate memory for every segment/resource. This is not yet
+ * supported, though.
+ */
+int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw)
+{
+	struct device *dev = &rproc->dev;
+	struct elf32_hdr *ehdr;
+	struct elf32_phdr *phdr;
+	int i, ret = 0;
+	const u8 *elf_data = fw->data;
+
+	ehdr = (struct elf32_hdr *)elf_data;
+	phdr = (struct elf32_phdr *)(elf_data + ehdr->e_phoff);
+
+	/* go through the available ELF segments */
+	for (i = 0; i < ehdr->e_phnum; i++, phdr++) {
+		u32 da = phdr->p_paddr;
+		u32 memsz = phdr->p_memsz;
+		u32 filesz = phdr->p_filesz;
+		u32 offset = phdr->p_offset;
+		void *ptr;
+
+		if (phdr->p_type != PT_LOAD)
+			continue;
+
+		dev_dbg(dev, "phdr: type %d da 0x%x memsz 0x%x filesz 0x%x\n",
+			phdr->p_type, da, memsz, filesz);
+
+		if (filesz > memsz) {
+			dev_err(dev, "bad phdr filesz 0x%x memsz 0x%x\n",
+				filesz, memsz);
+			ret = -EINVAL;
+			break;
+		}
+
+		if (offset + filesz > fw->size) {
+			dev_err(dev, "truncated fw: need 0x%x avail 0x%zx\n",
+				offset + filesz, fw->size);
+			ret = -EINVAL;
+			break;
+		}
+
+		/* grab the kernel address for this device address */
+		ptr = rproc_da_to_va(rproc, da, memsz);
+		if (!ptr) {
+			dev_err(dev, "bad phdr da 0x%x mem 0x%x\n", da, memsz);
+			ret = -EINVAL;
+			break;
+		}
+
+		/* put the segment where the remote processor expects it */
+		if (phdr->p_filesz)
+			memcpy(ptr, elf_data + phdr->p_offset, filesz);
+
+		/*
+		 * Zero out remaining memory for this segment.
+		 *
+		 * This isn't strictly required since dma_alloc_coherent already
+		 * did this for us. albeit harmless, we may consider removing
+		 * this.
+		 */
+		if (memsz > filesz)
+			memset(ptr + filesz, 0, memsz - filesz);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(rproc_elf_load_segments);
+
+static struct elf32_shdr *
+find_table(struct device *dev, struct elf32_hdr *ehdr, size_t fw_size)
+{
+	struct elf32_shdr *shdr;
+	int i;
+	const char *name_table;
+	struct resource_table *table = NULL;
+	const u8 *elf_data = (void *)ehdr;
+
+	/* look for the resource table and handle it */
+	shdr = (struct elf32_shdr *)(elf_data + ehdr->e_shoff);
+	name_table = elf_data + shdr[ehdr->e_shstrndx].sh_offset;
+
+	for (i = 0; i < ehdr->e_shnum; i++, shdr++) {
+		u32 size = shdr->sh_size;
+		u32 offset = shdr->sh_offset;
+
+		if (strcmp(name_table + shdr->sh_name, ".resource_table"))
+			continue;
+
+		table = (struct resource_table *)(elf_data + offset);
+
+		/* make sure we have the entire table */
+		if (offset + size > fw_size || offset + size < size) {
+			dev_err(dev, "resource table truncated\n");
+			return NULL;
+		}
+
+		/* make sure table has at least the header */
+		if (sizeof(struct resource_table) > size) {
+			dev_err(dev, "header-less resource table\n");
+			return NULL;
+		}
+
+		/* we don't support any version beyond the first */
+		if (table->ver != 1) {
+			dev_err(dev, "unsupported fw ver: %d\n", table->ver);
+			return NULL;
+		}
+
+		/* make sure reserved bytes are zeroes */
+		if (table->reserved[0] || table->reserved[1]) {
+			dev_err(dev, "non zero reserved bytes\n");
+			return NULL;
+		}
+
+		/* make sure the offsets array isn't truncated */
+		if (table->num * sizeof(table->offset[0]) +
+				sizeof(struct resource_table) > size) {
+			dev_err(dev, "resource table incomplete\n");
+			return NULL;
+		}
+
+		return shdr;
+	}
+
+	return NULL;
+}
+
+/**
+ * rproc_elf_load_rsc_table() - load the resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ *
+ * This function finds the resource table inside the remote processor's
+ * firmware, load it into the @cached_table and update @table_ptr.
+ *
+ * Return: 0 on success, negative errno on failure.
+ */
+int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw)
+{
+	struct elf32_hdr *ehdr;
+	struct elf32_shdr *shdr;
+	struct device *dev = &rproc->dev;
+	struct resource_table *table = NULL;
+	const u8 *elf_data = fw->data;
+	size_t tablesz;
+
+	ehdr = (struct elf32_hdr *)elf_data;
+
+	shdr = find_table(dev, ehdr, fw->size);
+	if (!shdr)
+		return -EINVAL;
+
+	table = (struct resource_table *)(elf_data + shdr->sh_offset);
+	tablesz = shdr->sh_size;
+
+	/*
+	 * Create a copy of the resource table. When a virtio device starts
+	 * and calls vring_new_virtqueue() the address of the allocated vring
+	 * will be stored in the cached_table. Before the device is started,
+	 * cached_table will be copied into device memory.
+	 */
+	rproc->cached_table = kmemdup(table, tablesz, GFP_KERNEL);
+	if (!rproc->cached_table)
+		return -ENOMEM;
+
+	rproc->table_ptr = rproc->cached_table;
+	rproc->table_sz = tablesz;
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_elf_load_rsc_table);
+
+/**
+ * rproc_elf_find_loaded_rsc_table() - find the loaded resource table
+ * @rproc: the rproc handle
+ * @fw: the ELF firmware image
+ *
+ * This function finds the location of the loaded resource table. Don't
+ * call this function if the table wasn't loaded yet - it's a bug if you do.
+ *
+ * Returns the pointer to the resource table if it is found or NULL otherwise.
+ * If the table wasn't loaded yet the result is unspecified.
+ */
+struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
+						       const struct firmware *fw)
+{
+	struct elf32_hdr *ehdr = (struct elf32_hdr *)fw->data;
+	struct elf32_shdr *shdr;
+
+	shdr = find_table(&rproc->dev, ehdr, fw->size);
+	if (!shdr)
+		return NULL;
+
+	return rproc_da_to_va(rproc, shdr->sh_addr, shdr->sh_size);
+}
+EXPORT_SYMBOL(rproc_elf_find_loaded_rsc_table);
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
new file mode 100644
index 000000000..7570beb03
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -0,0 +1,109 @@
+/*
+ * Remote processor framework
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef REMOTEPROC_INTERNAL_H
+#define REMOTEPROC_INTERNAL_H
+
+#include <linux/irqreturn.h>
+#include <linux/firmware.h>
+
+struct rproc;
+
+/* from remoteproc_core.c */
+void rproc_release(struct kref *kref);
+irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
+void rproc_vdev_release(struct kref *ref);
+
+/* from remoteproc_virtio.c */
+int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id);
+void rproc_remove_virtio_dev(struct rproc_vdev *rvdev);
+
+/* from remoteproc_debugfs.c */
+void rproc_remove_trace_file(struct dentry *tfile);
+struct dentry *rproc_create_trace_file(const char *name, struct rproc *rproc,
+				       struct rproc_mem_entry *trace);
+void rproc_delete_debug_dir(struct rproc *rproc);
+void rproc_create_debug_dir(struct rproc *rproc);
+void rproc_init_debugfs(void);
+void rproc_exit_debugfs(void);
+
+/* from remoteproc_sysfs.c */
+extern struct class rproc_class;
+int rproc_init_sysfs(void);
+void rproc_exit_sysfs(void);
+
+void rproc_free_vring(struct rproc_vring *rvring);
+int rproc_alloc_vring(struct rproc_vdev *rvdev, int i);
+
+void *rproc_da_to_va(struct rproc *rproc, u64 da, int len);
+int rproc_trigger_recovery(struct rproc *rproc);
+
+int rproc_elf_sanity_check(struct rproc *rproc, const struct firmware *fw);
+u32 rproc_elf_get_boot_addr(struct rproc *rproc, const struct firmware *fw);
+int rproc_elf_load_segments(struct rproc *rproc, const struct firmware *fw);
+int rproc_elf_load_rsc_table(struct rproc *rproc, const struct firmware *fw);
+struct resource_table *rproc_elf_find_loaded_rsc_table(struct rproc *rproc,
+						       const struct firmware *fw);
+
+static inline
+int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
+{
+	if (rproc->ops->sanity_check)
+		return rproc->ops->sanity_check(rproc, fw);
+
+	return 0;
+}
+
+static inline
+u32 rproc_get_boot_addr(struct rproc *rproc, const struct firmware *fw)
+{
+	if (rproc->ops->get_boot_addr)
+		return rproc->ops->get_boot_addr(rproc, fw);
+
+	return 0;
+}
+
+static inline
+int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
+{
+	if (rproc->ops->load)
+		return rproc->ops->load(rproc, fw);
+
+	return -EINVAL;
+}
+
+static inline int rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
+{
+	if (rproc->ops->parse_fw)
+		return rproc->ops->parse_fw(rproc, fw);
+
+	return 0;
+}
+
+static inline
+struct resource_table *rproc_find_loaded_rsc_table(struct rproc *rproc,
+						   const struct firmware *fw)
+{
+	if (rproc->ops->find_loaded_rsc_table)
+		return rproc->ops->find_loaded_rsc_table(rproc, fw);
+
+	return NULL;
+}
+
+#endif /* REMOTEPROC_INTERNAL_H */
diff --git a/drivers/remoteproc/remoteproc_sysfs.c b/drivers/remoteproc/remoteproc_sysfs.c
new file mode 100644
index 000000000..3a4c3d7ca
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_sysfs.c
@@ -0,0 +1,157 @@
+/*
+ * Remote Processor Framework
+ *
+ * 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/remoteproc.h>
+
+#include "remoteproc_internal.h"
+
+#define to_rproc(d) container_of(d, struct rproc, dev)
+
+/* Expose the loaded / running firmware name via sysfs */
+static ssize_t firmware_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct rproc *rproc = to_rproc(dev);
+
+	return sprintf(buf, "%s\n", rproc->firmware);
+}
+
+/* Change firmware name via sysfs */
+static ssize_t firmware_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct rproc *rproc = to_rproc(dev);
+	char *p;
+	int err, len = count;
+
+	err = mutex_lock_interruptible(&rproc->lock);
+	if (err) {
+		dev_err(dev, "can't lock rproc %s: %d\n", rproc->name, err);
+		return -EINVAL;
+	}
+
+	if (rproc->state != RPROC_OFFLINE) {
+		dev_err(dev, "can't change firmware while running\n");
+		err = -EBUSY;
+		goto out;
+	}
+
+	len = strcspn(buf, "\n");
+	if (!len) {
+		dev_err(dev, "can't provide a NULL firmware\n");
+		err = -EINVAL;
+		goto out;
+	}
+
+	p = kstrndup(buf, len, GFP_KERNEL);
+	if (!p) {
+		err = -ENOMEM;
+		goto out;
+	}
+
+	kfree(rproc->firmware);
+	rproc->firmware = p;
+out:
+	mutex_unlock(&rproc->lock);
+
+	return err ? err : count;
+}
+static DEVICE_ATTR_RW(firmware);
+
+/*
+ * A state-to-string lookup table, for exposing a human readable state
+ * via sysfs. Always keep in sync with enum rproc_state
+ */
+static const char * const rproc_state_string[] = {
+	[RPROC_OFFLINE]		= "offline",
+	[RPROC_SUSPENDED]	= "suspended",
+	[RPROC_RUNNING]		= "running",
+	[RPROC_CRASHED]		= "crashed",
+	[RPROC_DELETED]		= "deleted",
+	[RPROC_LAST]		= "invalid",
+};
+
+/* Expose the state of the remote processor via sysfs */
+static ssize_t state_show(struct device *dev, struct device_attribute *attr,
+			  char *buf)
+{
+	struct rproc *rproc = to_rproc(dev);
+	unsigned int state;
+
+	state = rproc->state > RPROC_LAST ? RPROC_LAST : rproc->state;
+	return sprintf(buf, "%s\n", rproc_state_string[state]);
+}
+
+/* Change remote processor state via sysfs */
+static ssize_t state_store(struct device *dev,
+			      struct device_attribute *attr,
+			      const char *buf, size_t count)
+{
+	struct rproc *rproc = to_rproc(dev);
+	int ret = 0;
+
+	if (sysfs_streq(buf, "start")) {
+		if (rproc->state == RPROC_RUNNING)
+			return -EBUSY;
+
+		ret = rproc_boot(rproc);
+		if (ret)
+			dev_err(&rproc->dev, "Boot failed: %d\n", ret);
+	} else if (sysfs_streq(buf, "stop")) {
+		if (rproc->state != RPROC_RUNNING)
+			return -EINVAL;
+
+		rproc_shutdown(rproc);
+	} else {
+		dev_err(&rproc->dev, "Unrecognised option: %s\n", buf);
+		ret = -EINVAL;
+	}
+	return ret ? ret : count;
+}
+static DEVICE_ATTR_RW(state);
+
+static struct attribute *rproc_attrs[] = {
+	&dev_attr_firmware.attr,
+	&dev_attr_state.attr,
+	NULL
+};
+
+static const struct attribute_group rproc_devgroup = {
+	.attrs = rproc_attrs
+};
+
+static const struct attribute_group *rproc_devgroups[] = {
+	&rproc_devgroup,
+	NULL
+};
+
+struct class rproc_class = {
+	.name		= "remoteproc",
+	.dev_groups	= rproc_devgroups,
+};
+
+int __init rproc_init_sysfs(void)
+{
+	/* create remoteproc device class for sysfs */
+	int err = class_register(&rproc_class);
+
+	if (err)
+		pr_err("remoteproc: unable to register class\n");
+	return err;
+}
+
+void __exit rproc_exit_sysfs(void)
+{
+	class_unregister(&rproc_class);
+}
diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
new file mode 100644
index 000000000..bbecd44df
--- /dev/null
+++ b/drivers/remoteproc/remoteproc_virtio.c
@@ -0,0 +1,350 @@
+/*
+ * Remote processor messaging transport (OMAP platform-specific bits)
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ * Copyright (C) 2011 Google, Inc.
+ *
+ * Ohad Ben-Cohen <ohad@wizery.com>
+ * Brian Swetland <swetland@google.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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/export.h>
+#include <linux/remoteproc.h>
+#include <linux/virtio.h>
+#include <linux/virtio_config.h>
+#include <linux/virtio_ids.h>
+#include <linux/virtio_ring.h>
+#include <linux/err.h>
+#include <linux/kref.h>
+#include <linux/slab.h>
+
+#include "remoteproc_internal.h"
+
+/* kick the remote processor, and let it know which virtqueue to poke at */
+static bool rproc_virtio_notify(struct virtqueue *vq)
+{
+	struct rproc_vring *rvring = vq->priv;
+	struct rproc *rproc = rvring->rvdev->rproc;
+	int notifyid = rvring->notifyid;
+
+	dev_dbg(&rproc->dev, "kicking vq index: %d\n", notifyid);
+
+	rproc->ops->kick(rproc, notifyid);
+	return true;
+}
+
+/**
+ * rproc_vq_interrupt() - tell remoteproc that a virtqueue is interrupted
+ * @rproc: handle to the remote processor
+ * @notifyid: index of the signalled virtqueue (unique per this @rproc)
+ *
+ * This function should be called by the platform-specific rproc driver,
+ * when the remote processor signals that a specific virtqueue has pending
+ * messages available.
+ *
+ * Returns IRQ_NONE if no message was found in the @notifyid virtqueue,
+ * and otherwise returns IRQ_HANDLED.
+ */
+irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int notifyid)
+{
+	struct rproc_vring *rvring;
+
+	dev_dbg(&rproc->dev, "vq index %d is interrupted\n", notifyid);
+
+	rvring = idr_find(&rproc->notifyids, notifyid);
+	if (!rvring || !rvring->vq)
+		return IRQ_NONE;
+
+	return vring_interrupt(0, rvring->vq);
+}
+EXPORT_SYMBOL(rproc_vq_interrupt);
+
+static struct virtqueue *rp_find_vq(struct virtio_device *vdev,
+				    unsigned int id,
+				    void (*callback)(struct virtqueue *vq),
+				    const char *name, bool ctx)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct rproc *rproc = vdev_to_rproc(vdev);
+	struct device *dev = &rproc->dev;
+	struct rproc_vring *rvring;
+	struct virtqueue *vq;
+	void *addr;
+	int len, size;
+
+	/* we're temporarily limited to two virtqueues per rvdev */
+	if (id >= ARRAY_SIZE(rvdev->vring))
+		return ERR_PTR(-EINVAL);
+
+	if (!name)
+		return NULL;
+
+	rvring = &rvdev->vring[id];
+	addr = rvring->va;
+	len = rvring->len;
+
+	/* zero vring */
+	size = vring_size(len, rvring->align);
+	memset(addr, 0, size);
+
+	dev_dbg(dev, "vring%d: va %pK qsz %d notifyid %d\n",
+		id, addr, len, rvring->notifyid);
+
+	/*
+	 * Create the new vq, and tell virtio we're not interested in
+	 * the 'weak' smp barriers, since we're talking with a real device.
+	 */
+	vq = vring_new_virtqueue(id, len, rvring->align, vdev, false, ctx,
+				 addr, rproc_virtio_notify, callback, name);
+	if (!vq) {
+		dev_err(dev, "vring_new_virtqueue %s failed\n", name);
+		rproc_free_vring(rvring);
+		return ERR_PTR(-ENOMEM);
+	}
+
+	rvring->vq = vq;
+	vq->priv = rvring;
+
+	return vq;
+}
+
+static void __rproc_virtio_del_vqs(struct virtio_device *vdev)
+{
+	struct virtqueue *vq, *n;
+	struct rproc_vring *rvring;
+
+	list_for_each_entry_safe(vq, n, &vdev->vqs, list) {
+		rvring = vq->priv;
+		rvring->vq = NULL;
+		vring_del_virtqueue(vq);
+	}
+}
+
+static void rproc_virtio_del_vqs(struct virtio_device *vdev)
+{
+	__rproc_virtio_del_vqs(vdev);
+}
+
+static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
+				 struct virtqueue *vqs[],
+				 vq_callback_t *callbacks[],
+				 const char * const names[],
+				 const bool * ctx,
+				 struct irq_affinity *desc)
+{
+	int i, ret;
+
+	for (i = 0; i < nvqs; ++i) {
+		vqs[i] = rp_find_vq(vdev, i, callbacks[i], names[i],
+				    ctx ? ctx[i] : false);
+		if (IS_ERR(vqs[i])) {
+			ret = PTR_ERR(vqs[i]);
+			goto error;
+		}
+	}
+
+	return 0;
+
+error:
+	__rproc_virtio_del_vqs(vdev);
+	return ret;
+}
+
+static u8 rproc_virtio_get_status(struct virtio_device *vdev)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	return rsc->status;
+}
+
+static void rproc_virtio_set_status(struct virtio_device *vdev, u8 status)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	rsc->status = status;
+	dev_dbg(&vdev->dev, "status: %d\n", status);
+}
+
+static void rproc_virtio_reset(struct virtio_device *vdev)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	rsc->status = 0;
+	dev_dbg(&vdev->dev, "reset !\n");
+}
+
+/* provide the vdev features as retrieved from the firmware */
+static u64 rproc_virtio_get_features(struct virtio_device *vdev)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	return rsc->dfeatures;
+}
+
+static int rproc_virtio_finalize_features(struct virtio_device *vdev)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+
+	/* Give virtio_ring a chance to accept features */
+	vring_transport_features(vdev);
+
+	/* Make sure we don't have any features > 32 bits! */
+	BUG_ON((u32)vdev->features != vdev->features);
+
+	/*
+	 * Remember the finalized features of our vdev, and provide it
+	 * to the remote processor once it is powered on.
+	 */
+	rsc->gfeatures = vdev->features;
+
+	return 0;
+}
+
+static void rproc_virtio_get(struct virtio_device *vdev, unsigned int offset,
+			     void *buf, unsigned int len)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+	void *cfg;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+	cfg = &rsc->vring[rsc->num_of_vrings];
+
+	if (offset + len > rsc->config_len || offset + len < len) {
+		dev_err(&vdev->dev, "rproc_virtio_get: access out of bounds\n");
+		return;
+	}
+
+	memcpy(buf, cfg + offset, len);
+}
+
+static void rproc_virtio_set(struct virtio_device *vdev, unsigned int offset,
+			     const void *buf, unsigned int len)
+{
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct fw_rsc_vdev *rsc;
+	void *cfg;
+
+	rsc = (void *)rvdev->rproc->table_ptr + rvdev->rsc_offset;
+	cfg = &rsc->vring[rsc->num_of_vrings];
+
+	if (offset + len > rsc->config_len || offset + len < len) {
+		dev_err(&vdev->dev, "rproc_virtio_set: access out of bounds\n");
+		return;
+	}
+
+	memcpy(cfg + offset, buf, len);
+}
+
+static const struct virtio_config_ops rproc_virtio_config_ops = {
+	.get_features	= rproc_virtio_get_features,
+	.finalize_features = rproc_virtio_finalize_features,
+	.find_vqs	= rproc_virtio_find_vqs,
+	.del_vqs	= rproc_virtio_del_vqs,
+	.reset		= rproc_virtio_reset,
+	.set_status	= rproc_virtio_set_status,
+	.get_status	= rproc_virtio_get_status,
+	.get		= rproc_virtio_get,
+	.set		= rproc_virtio_set,
+};
+
+/*
+ * This function is called whenever vdev is released, and is responsible
+ * to decrement the remote processor's refcount which was taken when vdev was
+ * added.
+ *
+ * Never call this function directly; it will be called by the driver
+ * core when needed.
+ */
+static void rproc_virtio_dev_release(struct device *dev)
+{
+	struct virtio_device *vdev = dev_to_virtio(dev);
+	struct rproc_vdev *rvdev = vdev_to_rvdev(vdev);
+	struct rproc *rproc = vdev_to_rproc(vdev);
+
+	kref_put(&rvdev->refcount, rproc_vdev_release);
+
+	put_device(&rproc->dev);
+}
+
+/**
+ * rproc_add_virtio_dev() - register an rproc-induced virtio device
+ * @rvdev: the remote vdev
+ *
+ * This function registers a virtio device. This vdev's partent is
+ * the rproc device.
+ *
+ * Returns 0 on success or an appropriate error value otherwise.
+ */
+int rproc_add_virtio_dev(struct rproc_vdev *rvdev, int id)
+{
+	struct rproc *rproc = rvdev->rproc;
+	struct device *dev = &rproc->dev;
+	struct virtio_device *vdev = &rvdev->vdev;
+	int ret;
+
+	vdev->id.device	= id,
+	vdev->config = &rproc_virtio_config_ops,
+	vdev->dev.parent = dev;
+	vdev->dev.release = rproc_virtio_dev_release;
+
+	/*
+	 * We're indirectly making a non-temporary copy of the rproc pointer
+	 * here, because drivers probed with this vdev will indirectly
+	 * access the wrapping rproc.
+	 *
+	 * Therefore we must increment the rproc refcount here, and decrement
+	 * it _only_ when the vdev is released.
+	 */
+	get_device(&rproc->dev);
+
+	/* Reference the vdev and vring allocations */
+	kref_get(&rvdev->refcount);
+
+	ret = register_virtio_device(vdev);
+	if (ret) {
+		put_device(&vdev->dev);
+		dev_err(dev, "failed to register vdev: %d\n", ret);
+		goto out;
+	}
+
+	dev_info(dev, "registered %s (type %d)\n", dev_name(&vdev->dev), id);
+
+out:
+	return ret;
+}
+
+/**
+ * rproc_remove_virtio_dev() - remove an rproc-induced virtio device
+ * @rvdev: the remote vdev
+ *
+ * This function unregisters an existing virtio device.
+ */
+void rproc_remove_virtio_dev(struct rproc_vdev *rvdev)
+{
+	unregister_virtio_device(&rvdev->vdev);
+}
diff --git a/drivers/remoteproc/st_remoteproc.c b/drivers/remoteproc/st_remoteproc.c
new file mode 100644
index 000000000..aacef0ea3
--- /dev/null
+++ b/drivers/remoteproc/st_remoteproc.c
@@ -0,0 +1,412 @@
+/*
+ * ST's Remote Processor Control Driver
+ *
+ * Copyright (C) 2015 STMicroelectronics - All Rights Reserved
+ *
+ * Author: Ludovic Barre <ludovic.barre@st.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/clk.h>
+#include <linux/dma-mapping.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/mailbox_client.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_reserved_mem.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/remoteproc.h>
+#include <linux/reset.h>
+
+#include "remoteproc_internal.h"
+
+#define ST_RPROC_VQ0		0
+#define ST_RPROC_VQ1		1
+#define ST_RPROC_MAX_VRING	2
+
+#define MBOX_RX			0
+#define MBOX_TX			1
+#define MBOX_MAX		2
+
+struct st_rproc_config {
+	bool			sw_reset;
+	bool			pwr_reset;
+	unsigned long		bootaddr_mask;
+};
+
+struct st_rproc {
+	struct st_rproc_config	*config;
+	struct reset_control	*sw_reset;
+	struct reset_control	*pwr_reset;
+	struct clk		*clk;
+	u32			clk_rate;
+	struct regmap		*boot_base;
+	u32			boot_offset;
+	struct mbox_chan	*mbox_chan[ST_RPROC_MAX_VRING * MBOX_MAX];
+	struct mbox_client mbox_client_vq0;
+	struct mbox_client mbox_client_vq1;
+};
+
+static void st_rproc_mbox_callback(struct device *dev, u32 msg)
+{
+	struct rproc *rproc = dev_get_drvdata(dev);
+
+	if (rproc_vq_interrupt(rproc, msg) == IRQ_NONE)
+		dev_dbg(dev, "no message was found in vqid %d\n", msg);
+}
+
+static
+void st_rproc_mbox_callback_vq0(struct mbox_client *mbox_client, void *data)
+{
+	st_rproc_mbox_callback(mbox_client->dev, 0);
+}
+
+static
+void st_rproc_mbox_callback_vq1(struct mbox_client *mbox_client, void *data)
+{
+	st_rproc_mbox_callback(mbox_client->dev, 1);
+}
+
+static void st_rproc_kick(struct rproc *rproc, int vqid)
+{
+	struct st_rproc *ddata = rproc->priv;
+	struct device *dev = rproc->dev.parent;
+	int ret;
+
+	/* send the index of the triggered virtqueue in the mailbox payload */
+	if (WARN_ON(vqid >= ST_RPROC_MAX_VRING))
+		return;
+
+	ret = mbox_send_message(ddata->mbox_chan[vqid * MBOX_MAX + MBOX_TX],
+				(void *)&vqid);
+	if (ret < 0)
+		dev_err(dev, "failed to send message via mbox: %d\n", ret);
+}
+
+static int st_rproc_start(struct rproc *rproc)
+{
+	struct st_rproc *ddata = rproc->priv;
+	int err;
+
+	regmap_update_bits(ddata->boot_base, ddata->boot_offset,
+			   ddata->config->bootaddr_mask, rproc->bootaddr);
+
+	err = clk_enable(ddata->clk);
+	if (err) {
+		dev_err(&rproc->dev, "Failed to enable clock\n");
+		return err;
+	}
+
+	if (ddata->config->sw_reset) {
+		err = reset_control_deassert(ddata->sw_reset);
+		if (err) {
+			dev_err(&rproc->dev, "Failed to deassert S/W Reset\n");
+			goto sw_reset_fail;
+		}
+	}
+
+	if (ddata->config->pwr_reset) {
+		err = reset_control_deassert(ddata->pwr_reset);
+		if (err) {
+			dev_err(&rproc->dev, "Failed to deassert Power Reset\n");
+			goto pwr_reset_fail;
+		}
+	}
+
+	dev_info(&rproc->dev, "Started from 0x%x\n", rproc->bootaddr);
+
+	return 0;
+
+
+pwr_reset_fail:
+	if (ddata->config->pwr_reset)
+		reset_control_assert(ddata->sw_reset);
+sw_reset_fail:
+	clk_disable(ddata->clk);
+
+	return err;
+}
+
+static int st_rproc_stop(struct rproc *rproc)
+{
+	struct st_rproc *ddata = rproc->priv;
+	int sw_err = 0, pwr_err = 0;
+
+	if (ddata->config->sw_reset) {
+		sw_err = reset_control_assert(ddata->sw_reset);
+		if (sw_err)
+			dev_err(&rproc->dev, "Failed to assert S/W Reset\n");
+	}
+
+	if (ddata->config->pwr_reset) {
+		pwr_err = reset_control_assert(ddata->pwr_reset);
+		if (pwr_err)
+			dev_err(&rproc->dev, "Failed to assert Power Reset\n");
+	}
+
+	clk_disable(ddata->clk);
+
+	return sw_err ?: pwr_err;
+}
+
+static const struct rproc_ops st_rproc_ops = {
+	.kick		= st_rproc_kick,
+	.start		= st_rproc_start,
+	.stop		= st_rproc_stop,
+};
+
+/*
+ * Fetch state of the processor: 0 is off, 1 is on.
+ */
+static int st_rproc_state(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+	struct st_rproc *ddata = rproc->priv;
+	int reset_sw = 0, reset_pwr = 0;
+
+	if (ddata->config->sw_reset)
+		reset_sw = reset_control_status(ddata->sw_reset);
+
+	if (ddata->config->pwr_reset)
+		reset_pwr = reset_control_status(ddata->pwr_reset);
+
+	if (reset_sw < 0 || reset_pwr < 0)
+		return -EINVAL;
+
+	return !reset_sw && !reset_pwr;
+}
+
+static const struct st_rproc_config st40_rproc_cfg = {
+	.sw_reset = true,
+	.pwr_reset = true,
+	.bootaddr_mask = GENMASK(28, 1),
+};
+
+static const struct st_rproc_config st231_rproc_cfg = {
+	.sw_reset = true,
+	.pwr_reset = false,
+	.bootaddr_mask = GENMASK(31, 6),
+};
+
+static const struct of_device_id st_rproc_match[] = {
+	{ .compatible = "st,st40-rproc", .data = &st40_rproc_cfg },
+	{ .compatible = "st,st231-rproc", .data = &st231_rproc_cfg },
+	{},
+};
+MODULE_DEVICE_TABLE(of, st_rproc_match);
+
+static int st_rproc_parse_dt(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct rproc *rproc = platform_get_drvdata(pdev);
+	struct st_rproc *ddata = rproc->priv;
+	struct device_node *np = dev->of_node;
+	int err;
+
+	if (ddata->config->sw_reset) {
+		ddata->sw_reset = devm_reset_control_get_exclusive(dev,
+								   "sw_reset");
+		if (IS_ERR(ddata->sw_reset)) {
+			dev_err(dev, "Failed to get S/W Reset\n");
+			return PTR_ERR(ddata->sw_reset);
+		}
+	}
+
+	if (ddata->config->pwr_reset) {
+		ddata->pwr_reset = devm_reset_control_get_exclusive(dev,
+								    "pwr_reset");
+		if (IS_ERR(ddata->pwr_reset)) {
+			dev_err(dev, "Failed to get Power Reset\n");
+			return PTR_ERR(ddata->pwr_reset);
+		}
+	}
+
+	ddata->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(ddata->clk)) {
+		dev_err(dev, "Failed to get clock\n");
+		return PTR_ERR(ddata->clk);
+	}
+
+	err = of_property_read_u32(np, "clock-frequency", &ddata->clk_rate);
+	if (err) {
+		dev_err(dev, "failed to get clock frequency\n");
+		return err;
+	}
+
+	ddata->boot_base = syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+	if (IS_ERR(ddata->boot_base)) {
+		dev_err(dev, "Boot base not found\n");
+		return PTR_ERR(ddata->boot_base);
+	}
+
+	err = of_property_read_u32_index(np, "st,syscfg", 1,
+					 &ddata->boot_offset);
+	if (err) {
+		dev_err(dev, "Boot offset not found\n");
+		return -EINVAL;
+	}
+
+	err = of_reserved_mem_device_init(dev);
+	if (err) {
+		dev_err(dev, "Failed to obtain shared memory\n");
+		return err;
+	}
+
+	err = clk_prepare(ddata->clk);
+	if (err)
+		dev_err(dev, "failed to get clock\n");
+
+	return err;
+}
+
+static int st_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct of_device_id *match;
+	struct st_rproc *ddata;
+	struct device_node *np = dev->of_node;
+	struct rproc *rproc;
+	struct mbox_chan *chan;
+	int enabled;
+	int ret, i;
+
+	match = of_match_device(st_rproc_match, dev);
+	if (!match || !match->data) {
+		dev_err(dev, "No device match found\n");
+		return -ENODEV;
+	}
+
+	rproc = rproc_alloc(dev, np->name, &st_rproc_ops, NULL, sizeof(*ddata));
+	if (!rproc)
+		return -ENOMEM;
+
+	rproc->has_iommu = false;
+	ddata = rproc->priv;
+	ddata->config = (struct st_rproc_config *)match->data;
+
+	platform_set_drvdata(pdev, rproc);
+
+	ret = st_rproc_parse_dt(pdev);
+	if (ret)
+		goto free_rproc;
+
+	enabled = st_rproc_state(pdev);
+	if (enabled < 0) {
+		ret = enabled;
+		goto free_clk;
+	}
+
+	if (enabled) {
+		atomic_inc(&rproc->power);
+		rproc->state = RPROC_RUNNING;
+	} else {
+		clk_set_rate(ddata->clk, ddata->clk_rate);
+	}
+
+	if (of_get_property(np, "mbox-names", NULL)) {
+		ddata->mbox_client_vq0.dev		= dev;
+		ddata->mbox_client_vq0.tx_done		= NULL;
+		ddata->mbox_client_vq0.tx_block	= false;
+		ddata->mbox_client_vq0.knows_txdone	= false;
+		ddata->mbox_client_vq0.rx_callback	= st_rproc_mbox_callback_vq0;
+
+		ddata->mbox_client_vq1.dev		= dev;
+		ddata->mbox_client_vq1.tx_done		= NULL;
+		ddata->mbox_client_vq1.tx_block	= false;
+		ddata->mbox_client_vq1.knows_txdone	= false;
+		ddata->mbox_client_vq1.rx_callback	= st_rproc_mbox_callback_vq1;
+
+		/*
+		 * To control a co-processor without IPC mechanism.
+		 * This driver can be used without mbox and rpmsg.
+		 */
+		chan = mbox_request_channel_byname(&ddata->mbox_client_vq0, "vq0_rx");
+		if (IS_ERR(chan)) {
+			dev_err(&rproc->dev, "failed to request mbox chan 0\n");
+			ret = PTR_ERR(chan);
+			goto free_clk;
+		}
+		ddata->mbox_chan[ST_RPROC_VQ0 * MBOX_MAX + MBOX_RX] = chan;
+
+		chan = mbox_request_channel_byname(&ddata->mbox_client_vq0, "vq0_tx");
+		if (IS_ERR(chan)) {
+			dev_err(&rproc->dev, "failed to request mbox chan 0\n");
+			ret = PTR_ERR(chan);
+			goto free_mbox;
+		}
+		ddata->mbox_chan[ST_RPROC_VQ0 * MBOX_MAX + MBOX_TX] = chan;
+
+		chan = mbox_request_channel_byname(&ddata->mbox_client_vq1, "vq1_rx");
+		if (IS_ERR(chan)) {
+			dev_err(&rproc->dev, "failed to request mbox chan 1\n");
+			ret = PTR_ERR(chan);
+			goto free_mbox;
+		}
+		ddata->mbox_chan[ST_RPROC_VQ1 * MBOX_MAX + MBOX_RX] = chan;
+
+		chan = mbox_request_channel_byname(&ddata->mbox_client_vq1, "vq1_tx");
+		if (IS_ERR(chan)) {
+			dev_err(&rproc->dev, "failed to request mbox chan 1\n");
+			ret = PTR_ERR(chan);
+			goto free_mbox;
+		}
+		ddata->mbox_chan[ST_RPROC_VQ1 * MBOX_MAX + MBOX_TX] = chan;
+	}
+
+	ret = rproc_add(rproc);
+	if (ret)
+		goto free_mbox;
+
+	return 0;
+
+free_mbox:
+	for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++)
+		mbox_free_channel(ddata->mbox_chan[i]);
+free_clk:
+	clk_unprepare(ddata->clk);
+free_rproc:
+	rproc_free(rproc);
+	return ret;
+}
+
+static int st_rproc_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+	struct st_rproc *ddata = rproc->priv;
+	int i;
+
+	rproc_del(rproc);
+
+	clk_disable_unprepare(ddata->clk);
+
+	of_reserved_mem_device_release(&pdev->dev);
+
+	for (i = 0; i < ST_RPROC_MAX_VRING * MBOX_MAX; i++)
+		mbox_free_channel(ddata->mbox_chan[i]);
+
+	rproc_free(rproc);
+
+	return 0;
+}
+
+static struct platform_driver st_rproc_driver = {
+	.probe = st_rproc_probe,
+	.remove = st_rproc_remove,
+	.driver = {
+		.name = "st-rproc",
+		.of_match_table = of_match_ptr(st_rproc_match),
+	},
+};
+module_platform_driver(st_rproc_driver);
+
+MODULE_DESCRIPTION("ST Remote Processor Control Driver");
+MODULE_AUTHOR("Ludovic Barre <ludovic.barre@st.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/st_slim_rproc.c b/drivers/remoteproc/st_slim_rproc.c
new file mode 100644
index 000000000..d711d9430
--- /dev/null
+++ b/drivers/remoteproc/st_slim_rproc.c
@@ -0,0 +1,339 @@
+/*
+ * SLIM core rproc driver
+ *
+ * Copyright (C) 2016 STMicroelectronics
+ *
+ * Author: Peter Griffin <peter.griffin@linaro.org>
+ *
+ * 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.
+ */
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/remoteproc/st_slim_rproc.h>
+#include "remoteproc_internal.h"
+
+/* SLIM core registers */
+#define SLIM_ID_OFST		0x0
+#define SLIM_VER_OFST		0x4
+
+#define SLIM_EN_OFST		0x8
+#define SLIM_EN_RUN			BIT(0)
+
+#define SLIM_CLK_GATE_OFST	0xC
+#define SLIM_CLK_GATE_DIS		BIT(0)
+#define SLIM_CLK_GATE_RESET		BIT(2)
+
+#define SLIM_SLIM_PC_OFST	0x20
+
+/* DMEM registers */
+#define SLIM_REV_ID_OFST	0x0
+#define SLIM_REV_ID_MIN_MASK		GENMASK(15, 8)
+#define SLIM_REV_ID_MIN(id)		((id & SLIM_REV_ID_MIN_MASK) >> 8)
+#define SLIM_REV_ID_MAJ_MASK		GENMASK(23, 16)
+#define SLIM_REV_ID_MAJ(id)		((id & SLIM_REV_ID_MAJ_MASK) >> 16)
+
+
+/* peripherals registers */
+#define SLIM_STBUS_SYNC_OFST	0xF88
+#define SLIM_STBUS_SYNC_DIS		BIT(0)
+
+#define SLIM_INT_SET_OFST	0xFD4
+#define SLIM_INT_CLR_OFST	0xFD8
+#define SLIM_INT_MASK_OFST	0xFDC
+
+#define SLIM_CMD_CLR_OFST	0xFC8
+#define SLIM_CMD_MASK_OFST	0xFCC
+
+static const char *mem_names[ST_SLIM_MEM_MAX] = {
+	[ST_SLIM_DMEM]	= "dmem",
+	[ST_SLIM_IMEM]	= "imem",
+};
+
+static int slim_clk_get(struct st_slim_rproc *slim_rproc, struct device *dev)
+{
+	int clk, err;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK; clk++) {
+		slim_rproc->clks[clk] = of_clk_get(dev->of_node, clk);
+		if (IS_ERR(slim_rproc->clks[clk])) {
+			err = PTR_ERR(slim_rproc->clks[clk]);
+			if (err == -EPROBE_DEFER)
+				goto err_put_clks;
+			slim_rproc->clks[clk] = NULL;
+			break;
+		}
+	}
+
+	return 0;
+
+err_put_clks:
+	while (--clk >= 0)
+		clk_put(slim_rproc->clks[clk]);
+
+	return err;
+}
+
+static void slim_clk_disable(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+}
+
+static int slim_clk_enable(struct st_slim_rproc *slim_rproc)
+{
+	int clk, ret;
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++) {
+		ret = clk_prepare_enable(slim_rproc->clks[clk]);
+		if (ret)
+			goto err_disable_clks;
+	}
+
+	return 0;
+
+err_disable_clks:
+	while (--clk >= 0)
+		clk_disable_unprepare(slim_rproc->clks[clk]);
+
+	return ret;
+}
+
+/*
+ * Remoteproc slim specific device handlers
+ */
+static int slim_rproc_start(struct rproc *rproc)
+{
+	struct device *dev = &rproc->dev;
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	unsigned long hw_id, hw_ver, fw_rev;
+	u32 val;
+
+	/* disable CPU pipeline clock & reset CPU pipeline */
+	val = SLIM_CLK_GATE_DIS | SLIM_CLK_GATE_RESET;
+	writel(val, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* disable SLIM core STBus sync */
+	writel(SLIM_STBUS_SYNC_DIS, slim_rproc->peri + SLIM_STBUS_SYNC_OFST);
+
+	/* enable cpu pipeline clock */
+	writel(!SLIM_CLK_GATE_DIS,
+		slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	/* clear int & cmd mailbox */
+	writel(~0U, slim_rproc->peri + SLIM_INT_CLR_OFST);
+	writel(~0U, slim_rproc->peri + SLIM_CMD_CLR_OFST);
+
+	/* enable all channels cmd & int */
+	writel(~0U, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(~0U, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* enable cpu */
+	writel(SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	hw_id = readl_relaxed(slim_rproc->slimcore + SLIM_ID_OFST);
+	hw_ver = readl_relaxed(slim_rproc->slimcore + SLIM_VER_OFST);
+
+	fw_rev = readl(slim_rproc->mem[ST_SLIM_DMEM].cpu_addr +
+			SLIM_REV_ID_OFST);
+
+	dev_info(dev, "fw rev:%ld.%ld on SLIM %ld.%ld\n",
+		 SLIM_REV_ID_MAJ(fw_rev), SLIM_REV_ID_MIN(fw_rev),
+		 hw_id, hw_ver);
+
+	return 0;
+}
+
+static int slim_rproc_stop(struct rproc *rproc)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	u32 val;
+
+	/* mask all (cmd & int) channels */
+	writel(0UL, slim_rproc->peri + SLIM_INT_MASK_OFST);
+	writel(0UL, slim_rproc->peri + SLIM_CMD_MASK_OFST);
+
+	/* disable cpu pipeline clock */
+	writel(SLIM_CLK_GATE_DIS, slim_rproc->slimcore + SLIM_CLK_GATE_OFST);
+
+	writel(!SLIM_EN_RUN, slim_rproc->slimcore + SLIM_EN_OFST);
+
+	val = readl(slim_rproc->slimcore + SLIM_EN_OFST);
+	if (val & SLIM_EN_RUN)
+		dev_warn(&rproc->dev, "Failed to disable SLIM");
+
+	dev_dbg(&rproc->dev, "slim stopped\n");
+
+	return 0;
+}
+
+static void *slim_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct st_slim_rproc *slim_rproc = rproc->priv;
+	void *va = NULL;
+	int i;
+
+	for (i = 0; i < ST_SLIM_MEM_MAX; i++) {
+		if (da != slim_rproc->mem[i].bus_addr)
+			continue;
+
+		if (len <= slim_rproc->mem[i].size) {
+			/* __force to make sparse happy with type conversion */
+			va = (__force void *)slim_rproc->mem[i].cpu_addr;
+			break;
+		}
+	}
+
+	dev_dbg(&rproc->dev, "da = 0x%llx len = 0x%x va = 0x%pK\n",
+		da, len, va);
+
+	return va;
+}
+
+static const struct rproc_ops slim_rproc_ops = {
+	.start		= slim_rproc_start,
+	.stop		= slim_rproc_stop,
+	.da_to_va       = slim_rproc_da_to_va,
+	.get_boot_addr	= rproc_elf_get_boot_addr,
+	.load		= rproc_elf_load_segments,
+	.sanity_check	= rproc_elf_sanity_check,
+};
+
+/**
+ * st_slim_rproc_alloc() - allocate and initialise slim rproc
+ * @pdev: Pointer to the platform_device struct
+ * @fw_name: Name of firmware for rproc to use
+ *
+ * Function for allocating and initialising a slim rproc for use by
+ * device drivers whose IP is based around the SLIM core. It
+ * obtains and enables any clocks required by the SLIM core and also
+ * ioremaps the various IO.
+ *
+ * Returns st_slim_rproc pointer or PTR_ERR() on error.
+ */
+
+struct st_slim_rproc *st_slim_rproc_alloc(struct platform_device *pdev,
+				char *fw_name)
+{
+	struct device *dev = &pdev->dev;
+	struct st_slim_rproc *slim_rproc;
+	struct device_node *np = dev->of_node;
+	struct rproc *rproc;
+	struct resource *res;
+	int err, i;
+
+	if (!fw_name)
+		return ERR_PTR(-EINVAL);
+
+	if (!of_device_is_compatible(np, "st,slim-rproc"))
+		return ERR_PTR(-EINVAL);
+
+	rproc = rproc_alloc(dev, np->name, &slim_rproc_ops,
+			fw_name, sizeof(*slim_rproc));
+	if (!rproc)
+		return ERR_PTR(-ENOMEM);
+
+	rproc->has_iommu = false;
+
+	slim_rproc = rproc->priv;
+	slim_rproc->rproc = rproc;
+
+	/* get imem and dmem */
+	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						mem_names[i]);
+
+		slim_rproc->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(slim_rproc->mem[i].cpu_addr)) {
+			dev_err(&pdev->dev, "devm_ioremap_resource failed\n");
+			err = PTR_ERR(slim_rproc->mem[i].cpu_addr);
+			goto err;
+		}
+		slim_rproc->mem[i].bus_addr = res->start;
+		slim_rproc->mem[i].size = resource_size(res);
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "slimcore");
+	slim_rproc->slimcore = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->slimcore)) {
+		dev_err(&pdev->dev, "failed to ioremap slimcore IO\n");
+		err = PTR_ERR(slim_rproc->slimcore);
+		goto err;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "peripherals");
+	slim_rproc->peri = devm_ioremap_resource(dev, res);
+	if (IS_ERR(slim_rproc->peri)) {
+		dev_err(&pdev->dev, "failed to ioremap peripherals IO\n");
+		err = PTR_ERR(slim_rproc->peri);
+		goto err;
+	}
+
+	err = slim_clk_get(slim_rproc, dev);
+	if (err)
+		goto err;
+
+	err = slim_clk_enable(slim_rproc);
+	if (err) {
+		dev_err(dev, "Failed to enable clocks\n");
+		goto err_clk_put;
+	}
+
+	/* Register as a remoteproc device */
+	err = rproc_add(rproc);
+	if (err) {
+		dev_err(dev, "registration of slim remoteproc failed\n");
+		goto err_clk_dis;
+	}
+
+	return slim_rproc;
+
+err_clk_dis:
+	slim_clk_disable(slim_rproc);
+err_clk_put:
+	for (i = 0; i < ST_SLIM_MAX_CLK && slim_rproc->clks[i]; i++)
+		clk_put(slim_rproc->clks[i]);
+err:
+	rproc_free(rproc);
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL(st_slim_rproc_alloc);
+
+/**
+  * st_slim_rproc_put() - put slim rproc resources
+  * @slim_rproc: Pointer to the st_slim_rproc struct
+  *
+  * Function for calling respective _put() functions on slim_rproc resources.
+  *
+  */
+void st_slim_rproc_put(struct st_slim_rproc *slim_rproc)
+{
+	int clk;
+
+	if (!slim_rproc)
+		return;
+
+	slim_clk_disable(slim_rproc);
+
+	for (clk = 0; clk < ST_SLIM_MAX_CLK && slim_rproc->clks[clk]; clk++)
+		clk_put(slim_rproc->clks[clk]);
+
+	rproc_del(slim_rproc->rproc);
+	rproc_free(slim_rproc->rproc);
+}
+EXPORT_SYMBOL(st_slim_rproc_put);
+
+MODULE_AUTHOR("Peter Griffin <peter.griffin@linaro.org>");
+MODULE_DESCRIPTION("STMicroelectronics SLIM core rproc driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/remoteproc/wkup_m3_rproc.c b/drivers/remoteproc/wkup_m3_rproc.c
new file mode 100644
index 000000000..1ada0e51f
--- /dev/null
+++ b/drivers/remoteproc/wkup_m3_rproc.c
@@ -0,0 +1,260 @@
+/*
+ * TI AMx3 Wakeup M3 Remote Processor driver
+ *
+ * Copyright (C) 2014-2015 Texas Instruments, Inc.
+ *
+ * Dave Gerlach <d-gerlach@ti.com>
+ * Suman Anna <s-anna@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 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/err.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/remoteproc.h>
+
+#include <linux/platform_data/wkup_m3.h>
+
+#include "remoteproc_internal.h"
+
+#define WKUPM3_MEM_MAX	2
+
+/**
+ * struct wkup_m3_mem - WkupM3 internal memory structure
+ * @cpu_addr: MPU virtual address of the memory region
+ * @bus_addr: Bus address used to access the memory region
+ * @dev_addr: Device address from Wakeup M3 view
+ * @size: Size of the memory region
+ */
+struct wkup_m3_mem {
+	void __iomem *cpu_addr;
+	phys_addr_t bus_addr;
+	u32 dev_addr;
+	size_t size;
+};
+
+/**
+ * struct wkup_m3_rproc - WkupM3 remote processor state
+ * @rproc: rproc handle
+ * @pdev: pointer to platform device
+ * @mem: WkupM3 memory information
+ */
+struct wkup_m3_rproc {
+	struct rproc *rproc;
+	struct platform_device *pdev;
+	struct wkup_m3_mem mem[WKUPM3_MEM_MAX];
+};
+
+static int wkup_m3_rproc_start(struct rproc *rproc)
+{
+	struct wkup_m3_rproc *wkupm3 = rproc->priv;
+	struct platform_device *pdev = wkupm3->pdev;
+	struct device *dev = &pdev->dev;
+	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
+
+	if (pdata->deassert_reset(pdev, pdata->reset_name)) {
+		dev_err(dev, "Unable to reset wkup_m3!\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int wkup_m3_rproc_stop(struct rproc *rproc)
+{
+	struct wkup_m3_rproc *wkupm3 = rproc->priv;
+	struct platform_device *pdev = wkupm3->pdev;
+	struct device *dev = &pdev->dev;
+	struct wkup_m3_platform_data *pdata = dev_get_platdata(dev);
+
+	if (pdata->assert_reset(pdev, pdata->reset_name)) {
+		dev_err(dev, "Unable to assert reset of wkup_m3!\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void *wkup_m3_rproc_da_to_va(struct rproc *rproc, u64 da, int len)
+{
+	struct wkup_m3_rproc *wkupm3 = rproc->priv;
+	void *va = NULL;
+	int i;
+	u32 offset;
+
+	if (len <= 0)
+		return NULL;
+
+	for (i = 0; i < WKUPM3_MEM_MAX; i++) {
+		if (da >= wkupm3->mem[i].dev_addr && da + len <=
+		    wkupm3->mem[i].dev_addr +  wkupm3->mem[i].size) {
+			offset = da -  wkupm3->mem[i].dev_addr;
+			/* __force to make sparse happy with type conversion */
+			va = (__force void *)(wkupm3->mem[i].cpu_addr + offset);
+			break;
+		}
+	}
+
+	return va;
+}
+
+static const struct rproc_ops wkup_m3_rproc_ops = {
+	.start		= wkup_m3_rproc_start,
+	.stop		= wkup_m3_rproc_stop,
+	.da_to_va	= wkup_m3_rproc_da_to_va,
+};
+
+static const struct of_device_id wkup_m3_rproc_of_match[] = {
+	{ .compatible = "ti,am3352-wkup-m3", },
+	{ .compatible = "ti,am4372-wkup-m3", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, wkup_m3_rproc_of_match);
+
+static int wkup_m3_rproc_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct wkup_m3_platform_data *pdata = dev->platform_data;
+	/* umem always needs to be processed first */
+	const char *mem_names[WKUPM3_MEM_MAX] = { "umem", "dmem" };
+	struct wkup_m3_rproc *wkupm3;
+	const char *fw_name;
+	struct rproc *rproc;
+	struct resource *res;
+	const __be32 *addrp;
+	u32 l4_offset = 0;
+	u64 size;
+	int ret;
+	int i;
+
+	if (!(pdata && pdata->deassert_reset && pdata->assert_reset &&
+	      pdata->reset_name)) {
+		dev_err(dev, "Platform data missing!\n");
+		return -ENODEV;
+	}
+
+	ret = of_property_read_string(dev->of_node, "ti,pm-firmware",
+				      &fw_name);
+	if (ret) {
+		dev_err(dev, "No firmware filename given\n");
+		return -ENODEV;
+	}
+
+	pm_runtime_enable(&pdev->dev);
+	ret = pm_runtime_get_sync(&pdev->dev);
+	if (ret < 0) {
+		dev_err(&pdev->dev, "pm_runtime_get_sync() failed\n");
+		goto err;
+	}
+
+	rproc = rproc_alloc(dev, "wkup_m3", &wkup_m3_rproc_ops,
+			    fw_name, sizeof(*wkupm3));
+	if (!rproc) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	rproc->auto_boot = false;
+
+	wkupm3 = rproc->priv;
+	wkupm3->rproc = rproc;
+	wkupm3->pdev = pdev;
+
+	for (i = 0; i < ARRAY_SIZE(mem_names); i++) {
+		res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+						   mem_names[i]);
+		wkupm3->mem[i].cpu_addr = devm_ioremap_resource(dev, res);
+		if (IS_ERR(wkupm3->mem[i].cpu_addr)) {
+			dev_err(&pdev->dev, "devm_ioremap_resource failed for resource %d\n",
+				i);
+			ret = PTR_ERR(wkupm3->mem[i].cpu_addr);
+			goto err;
+		}
+		wkupm3->mem[i].bus_addr = res->start;
+		wkupm3->mem[i].size = resource_size(res);
+		addrp = of_get_address(dev->of_node, i, &size, NULL);
+		/*
+		 * The wkupm3 has umem at address 0 in its view, so the device
+		 * addresses for each memory region is computed as a relative
+		 * offset of the bus address for umem, and therefore needs to be
+		 * processed first.
+		 */
+		if (!strcmp(mem_names[i], "umem"))
+			l4_offset = be32_to_cpu(*addrp);
+		wkupm3->mem[i].dev_addr = be32_to_cpu(*addrp) - l4_offset;
+	}
+
+	dev_set_drvdata(dev, rproc);
+
+	ret = rproc_add(rproc);
+	if (ret) {
+		dev_err(dev, "rproc_add failed\n");
+		goto err_put_rproc;
+	}
+
+	return 0;
+
+err_put_rproc:
+	rproc_free(rproc);
+err:
+	pm_runtime_put_noidle(dev);
+	pm_runtime_disable(dev);
+	return ret;
+}
+
+static int wkup_m3_rproc_remove(struct platform_device *pdev)
+{
+	struct rproc *rproc = platform_get_drvdata(pdev);
+
+	rproc_del(rproc);
+	rproc_free(rproc);
+	pm_runtime_put_sync(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int wkup_m3_rpm_suspend(struct device *dev)
+{
+	return -EBUSY;
+}
+
+static int wkup_m3_rpm_resume(struct device *dev)
+{
+	return 0;
+}
+#endif
+
+static const struct dev_pm_ops wkup_m3_rproc_pm_ops = {
+	SET_RUNTIME_PM_OPS(wkup_m3_rpm_suspend, wkup_m3_rpm_resume, NULL)
+};
+
+static struct platform_driver wkup_m3_rproc_driver = {
+	.probe = wkup_m3_rproc_probe,
+	.remove = wkup_m3_rproc_remove,
+	.driver = {
+		.name = "wkup_m3_rproc",
+		.of_match_table = wkup_m3_rproc_of_match,
+		.pm = &wkup_m3_rproc_pm_ops,
+	},
+};
+
+module_platform_driver(wkup_m3_rproc_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("TI Wakeup M3 remote processor control driver");
+MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>");