Adding upstream version 5.10.209.upstream/5.10.209upstream

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

5 files changed, 1252 insertions, 0 deletions

diff --git a/drivers/soc/xilinx/Kconfig b/drivers/soc/xilinx/Kconfig
new file mode 100644
index 000000000..646512d72
--- /dev/null
+++ b/drivers/soc/xilinx/Kconfig
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: GPL-2.0
+menu "Xilinx SoC drivers"
+
+config XILINX_VCU
+	tristate "Xilinx VCU logicoreIP Init"
+	depends on HAS_IOMEM
+	help
+	  Provides the driver to enable and disable the isolation between the
+	  processing system and programmable logic part by using the logicoreIP
+	  register set. This driver also configures the frequency based on the
+	  clock information from the logicoreIP register set.
+
+	  If you say yes here you get support for the logicoreIP.
+
+	  If unsure, say N.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called xlnx_vcu.
+
+config ZYNQMP_POWER
+	bool "Enable Xilinx Zynq MPSoC Power Management driver"
+	depends on PM && ZYNQMP_FIRMWARE
+	default y
+	select MAILBOX
+	select ZYNQMP_IPI_MBOX
+	help
+	  Say yes to enable power management support for ZyqnMP SoC.
+	  This driver uses firmware driver as an interface for power
+	  management request to firmware. It registers isr to handle
+	  power management callbacks from firmware. It registers mailbox client
+	  to handle power management callbacks from firmware.
+
+	  If in doubt, say N.
+
+config ZYNQMP_PM_DOMAINS
+	bool "Enable Zynq MPSoC generic PM domains"
+	default y
+	depends on PM && ZYNQMP_FIRMWARE
+	select PM_GENERIC_DOMAINS
+	help
+	  Say yes to enable device power management through PM domains
+	  If in doubt, say N.
+
+endmenu
diff --git a/drivers/soc/xilinx/Makefile b/drivers/soc/xilinx/Makefile
new file mode 100644
index 000000000..f66bfea5d
--- /dev/null
+++ b/drivers/soc/xilinx/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_XILINX_VCU)	+= xlnx_vcu.o
+obj-$(CONFIG_ZYNQMP_POWER)	+= zynqmp_power.o
+obj-$(CONFIG_ZYNQMP_PM_DOMAINS) += zynqmp_pm_domains.o
diff --git a/drivers/soc/xilinx/xlnx_vcu.c b/drivers/soc/xilinx/xlnx_vcu.c
new file mode 100644
index 000000000..a3aa40996
--- /dev/null
+++ b/drivers/soc/xilinx/xlnx_vcu.c
@@ -0,0 +1,630 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx VCU Init
+ *
+ * Copyright (C) 2016 - 2017 Xilinx, Inc.
+ *
+ * Contacts   Dhaval Shah <dshah@xilinx.com>
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+
+/* Address map for different registers implemented in the VCU LogiCORE IP. */
+#define VCU_ECODER_ENABLE		0x00
+#define VCU_DECODER_ENABLE		0x04
+#define VCU_MEMORY_DEPTH		0x08
+#define VCU_ENC_COLOR_DEPTH		0x0c
+#define VCU_ENC_VERTICAL_RANGE		0x10
+#define VCU_ENC_FRAME_SIZE_X		0x14
+#define VCU_ENC_FRAME_SIZE_Y		0x18
+#define VCU_ENC_COLOR_FORMAT		0x1c
+#define VCU_ENC_FPS			0x20
+#define VCU_MCU_CLK			0x24
+#define VCU_CORE_CLK			0x28
+#define VCU_PLL_BYPASS			0x2c
+#define VCU_ENC_CLK			0x30
+#define VCU_PLL_CLK			0x34
+#define VCU_ENC_VIDEO_STANDARD		0x38
+#define VCU_STATUS			0x3c
+#define VCU_AXI_ENC_CLK			0x40
+#define VCU_AXI_DEC_CLK			0x44
+#define VCU_AXI_MCU_CLK			0x48
+#define VCU_DEC_VIDEO_STANDARD		0x4c
+#define VCU_DEC_FRAME_SIZE_X		0x50
+#define VCU_DEC_FRAME_SIZE_Y		0x54
+#define VCU_DEC_FPS			0x58
+#define VCU_BUFFER_B_FRAME		0x5c
+#define VCU_WPP_EN			0x60
+#define VCU_PLL_CLK_DEC			0x64
+#define VCU_GASKET_INIT			0x74
+#define VCU_GASKET_VALUE		0x03
+
+/* vcu slcr registers, bitmask and shift */
+#define VCU_PLL_CTRL			0x24
+#define VCU_PLL_CTRL_RESET_MASK		0x01
+#define VCU_PLL_CTRL_RESET_SHIFT	0
+#define VCU_PLL_CTRL_BYPASS_MASK	0x01
+#define VCU_PLL_CTRL_BYPASS_SHIFT	3
+#define VCU_PLL_CTRL_FBDIV_MASK		0x7f
+#define VCU_PLL_CTRL_FBDIV_SHIFT	8
+#define VCU_PLL_CTRL_POR_IN_MASK	0x01
+#define VCU_PLL_CTRL_POR_IN_SHIFT	1
+#define VCU_PLL_CTRL_PWR_POR_MASK	0x01
+#define VCU_PLL_CTRL_PWR_POR_SHIFT	2
+#define VCU_PLL_CTRL_CLKOUTDIV_MASK	0x03
+#define VCU_PLL_CTRL_CLKOUTDIV_SHIFT	16
+#define VCU_PLL_CTRL_DEFAULT		0
+#define VCU_PLL_DIV2			2
+
+#define VCU_PLL_CFG			0x28
+#define VCU_PLL_CFG_RES_MASK		0x0f
+#define VCU_PLL_CFG_RES_SHIFT		0
+#define VCU_PLL_CFG_CP_MASK		0x0f
+#define VCU_PLL_CFG_CP_SHIFT		5
+#define VCU_PLL_CFG_LFHF_MASK		0x03
+#define VCU_PLL_CFG_LFHF_SHIFT		10
+#define VCU_PLL_CFG_LOCK_CNT_MASK	0x03ff
+#define VCU_PLL_CFG_LOCK_CNT_SHIFT	13
+#define VCU_PLL_CFG_LOCK_DLY_MASK	0x7f
+#define VCU_PLL_CFG_LOCK_DLY_SHIFT	25
+#define VCU_ENC_CORE_CTRL		0x30
+#define VCU_ENC_MCU_CTRL		0x34
+#define VCU_DEC_CORE_CTRL		0x38
+#define VCU_DEC_MCU_CTRL		0x3c
+#define VCU_PLL_DIVISOR_MASK		0x3f
+#define VCU_PLL_DIVISOR_SHIFT		4
+#define VCU_SRCSEL_MASK			0x01
+#define VCU_SRCSEL_SHIFT		0
+#define VCU_SRCSEL_PLL			1
+
+#define VCU_PLL_STATUS			0x60
+#define VCU_PLL_STATUS_LOCK_STATUS_MASK	0x01
+
+#define MHZ				1000000
+#define FVCO_MIN			(1500U * MHZ)
+#define FVCO_MAX			(3000U * MHZ)
+#define DIVISOR_MIN			0
+#define DIVISOR_MAX			63
+#define FRAC				100
+#define LIMIT				(10 * MHZ)
+
+/**
+ * struct xvcu_device - Xilinx VCU init device structure
+ * @dev: Platform device
+ * @pll_ref: pll ref clock source
+ * @aclk: axi clock source
+ * @logicore_reg_ba: logicore reg base address
+ * @vcu_slcr_ba: vcu_slcr Register base address
+ * @coreclk: core clock frequency
+ */
+struct xvcu_device {
+	struct device *dev;
+	struct clk *pll_ref;
+	struct clk *aclk;
+	void __iomem *logicore_reg_ba;
+	void __iomem *vcu_slcr_ba;
+	u32 coreclk;
+};
+
+/**
+ * struct xvcu_pll_cfg - Helper data
+ * @fbdiv: The integer portion of the feedback divider to the PLL
+ * @cp: PLL charge pump control
+ * @res: PLL loop filter resistor control
+ * @lfhf: PLL loop filter high frequency capacitor control
+ * @lock_dly: Lock circuit configuration settings for lock windowsize
+ * @lock_cnt: Lock circuit counter setting
+ */
+struct xvcu_pll_cfg {
+	u32 fbdiv;
+	u32 cp;
+	u32 res;
+	u32 lfhf;
+	u32 lock_dly;
+	u32 lock_cnt;
+};
+
+static const struct xvcu_pll_cfg xvcu_pll_cfg[] = {
+	{ 25, 3, 10, 3, 63, 1000 },
+	{ 26, 3, 10, 3, 63, 1000 },
+	{ 27, 4, 6, 3, 63, 1000 },
+	{ 28, 4, 6, 3, 63, 1000 },
+	{ 29, 4, 6, 3, 63, 1000 },
+	{ 30, 4, 6, 3, 63, 1000 },
+	{ 31, 6, 1, 3, 63, 1000 },
+	{ 32, 6, 1, 3, 63, 1000 },
+	{ 33, 4, 10, 3, 63, 1000 },
+	{ 34, 5, 6, 3, 63, 1000 },
+	{ 35, 5, 6, 3, 63, 1000 },
+	{ 36, 5, 6, 3, 63, 1000 },
+	{ 37, 5, 6, 3, 63, 1000 },
+	{ 38, 5, 6, 3, 63, 975 },
+	{ 39, 3, 12, 3, 63, 950 },
+	{ 40, 3, 12, 3, 63, 925 },
+	{ 41, 3, 12, 3, 63, 900 },
+	{ 42, 3, 12, 3, 63, 875 },
+	{ 43, 3, 12, 3, 63, 850 },
+	{ 44, 3, 12, 3, 63, 850 },
+	{ 45, 3, 12, 3, 63, 825 },
+	{ 46, 3, 12, 3, 63, 800 },
+	{ 47, 3, 12, 3, 63, 775 },
+	{ 48, 3, 12, 3, 63, 775 },
+	{ 49, 3, 12, 3, 63, 750 },
+	{ 50, 3, 12, 3, 63, 750 },
+	{ 51, 3, 2, 3, 63, 725 },
+	{ 52, 3, 2, 3, 63, 700 },
+	{ 53, 3, 2, 3, 63, 700 },
+	{ 54, 3, 2, 3, 63, 675 },
+	{ 55, 3, 2, 3, 63, 675 },
+	{ 56, 3, 2, 3, 63, 650 },
+	{ 57, 3, 2, 3, 63, 650 },
+	{ 58, 3, 2, 3, 63, 625 },
+	{ 59, 3, 2, 3, 63, 625 },
+	{ 60, 3, 2, 3, 63, 625 },
+	{ 61, 3, 2, 3, 63, 600 },
+	{ 62, 3, 2, 3, 63, 600 },
+	{ 63, 3, 2, 3, 63, 600 },
+	{ 64, 3, 2, 3, 63, 600 },
+	{ 65, 3, 2, 3, 63, 600 },
+	{ 66, 3, 2, 3, 63, 600 },
+	{ 67, 3, 2, 3, 63, 600 },
+	{ 68, 3, 2, 3, 63, 600 },
+	{ 69, 3, 2, 3, 63, 600 },
+	{ 70, 3, 2, 3, 63, 600 },
+	{ 71, 3, 2, 3, 63, 600 },
+	{ 72, 3, 2, 3, 63, 600 },
+	{ 73, 3, 2, 3, 63, 600 },
+	{ 74, 3, 2, 3, 63, 600 },
+	{ 75, 3, 2, 3, 63, 600 },
+	{ 76, 3, 2, 3, 63, 600 },
+	{ 77, 3, 2, 3, 63, 600 },
+	{ 78, 3, 2, 3, 63, 600 },
+	{ 79, 3, 2, 3, 63, 600 },
+	{ 80, 3, 2, 3, 63, 600 },
+	{ 81, 3, 2, 3, 63, 600 },
+	{ 82, 3, 2, 3, 63, 600 },
+	{ 83, 4, 2, 3, 63, 600 },
+	{ 84, 4, 2, 3, 63, 600 },
+	{ 85, 4, 2, 3, 63, 600 },
+	{ 86, 4, 2, 3, 63, 600 },
+	{ 87, 4, 2, 3, 63, 600 },
+	{ 88, 4, 2, 3, 63, 600 },
+	{ 89, 4, 2, 3, 63, 600 },
+	{ 90, 4, 2, 3, 63, 600 },
+	{ 91, 4, 2, 3, 63, 600 },
+	{ 92, 4, 2, 3, 63, 600 },
+	{ 93, 4, 2, 3, 63, 600 },
+	{ 94, 4, 2, 3, 63, 600 },
+	{ 95, 4, 2, 3, 63, 600 },
+	{ 96, 4, 2, 3, 63, 600 },
+	{ 97, 4, 2, 3, 63, 600 },
+	{ 98, 4, 2, 3, 63, 600 },
+	{ 99, 4, 2, 3, 63, 600 },
+	{ 100, 4, 2, 3, 63, 600 },
+	{ 101, 4, 2, 3, 63, 600 },
+	{ 102, 4, 2, 3, 63, 600 },
+	{ 103, 5, 2, 3, 63, 600 },
+	{ 104, 5, 2, 3, 63, 600 },
+	{ 105, 5, 2, 3, 63, 600 },
+	{ 106, 5, 2, 3, 63, 600 },
+	{ 107, 3, 4, 3, 63, 600 },
+	{ 108, 3, 4, 3, 63, 600 },
+	{ 109, 3, 4, 3, 63, 600 },
+	{ 110, 3, 4, 3, 63, 600 },
+	{ 111, 3, 4, 3, 63, 600 },
+	{ 112, 3, 4, 3, 63, 600 },
+	{ 113, 3, 4, 3, 63, 600 },
+	{ 114, 3, 4, 3, 63, 600 },
+	{ 115, 3, 4, 3, 63, 600 },
+	{ 116, 3, 4, 3, 63, 600 },
+	{ 117, 3, 4, 3, 63, 600 },
+	{ 118, 3, 4, 3, 63, 600 },
+	{ 119, 3, 4, 3, 63, 600 },
+	{ 120, 3, 4, 3, 63, 600 },
+	{ 121, 3, 4, 3, 63, 600 },
+	{ 122, 3, 4, 3, 63, 600 },
+	{ 123, 3, 4, 3, 63, 600 },
+	{ 124, 3, 4, 3, 63, 600 },
+	{ 125, 3, 4, 3, 63, 600 },
+};
+
+/**
+ * xvcu_read - Read from the VCU register space
+ * @iomem:	vcu reg space base address
+ * @offset:	vcu reg offset from base
+ *
+ * Return:	Returns 32bit value from VCU register specified
+ *
+ */
+static inline u32 xvcu_read(void __iomem *iomem, u32 offset)
+{
+	return ioread32(iomem + offset);
+}
+
+/**
+ * xvcu_write - Write to the VCU register space
+ * @iomem:	vcu reg space base address
+ * @offset:	vcu reg offset from base
+ * @value:	Value to write
+ */
+static inline void xvcu_write(void __iomem *iomem, u32 offset, u32 value)
+{
+	iowrite32(value, iomem + offset);
+}
+
+/**
+ * xvcu_write_field_reg - Write to the vcu reg field
+ * @iomem:	vcu reg space base address
+ * @offset:	vcu reg offset from base
+ * @field:	vcu reg field to write to
+ * @mask:	vcu reg mask
+ * @shift:	vcu reg number of bits to shift the bitfield
+ */
+static void xvcu_write_field_reg(void __iomem *iomem, int offset,
+				 u32 field, u32 mask, int shift)
+{
+	u32 val = xvcu_read(iomem, offset);
+
+	val &= ~(mask << shift);
+	val |= (field & mask) << shift;
+
+	xvcu_write(iomem, offset, val);
+}
+
+/**
+ * xvcu_set_vcu_pll_info - Set the VCU PLL info
+ * @xvcu:	Pointer to the xvcu_device structure
+ *
+ * Programming the VCU PLL based on the user configuration
+ * (ref clock freq, core clock freq, mcu clock freq).
+ * Core clock frequency has higher priority than mcu clock frequency
+ * Errors in following cases
+ *    - When mcu or clock clock get from logicoreIP is 0
+ *    - When VCU PLL DIV related bits value other than 1
+ *    - When proper data not found for given data
+ *    - When sis570_1 clocksource related operation failed
+ *
+ * Return:	Returns status, either success or error+reason
+ */
+static int xvcu_set_vcu_pll_info(struct xvcu_device *xvcu)
+{
+	u32 refclk, coreclk, mcuclk, inte, deci;
+	u32 divisor_mcu, divisor_core, fvco;
+	u32 clkoutdiv, vcu_pll_ctrl, pll_clk;
+	u32 cfg_val, mod, ctrl;
+	int ret, i;
+	const struct xvcu_pll_cfg *found = NULL;
+
+	inte = xvcu_read(xvcu->logicore_reg_ba, VCU_PLL_CLK);
+	deci = xvcu_read(xvcu->logicore_reg_ba, VCU_PLL_CLK_DEC);
+	coreclk = xvcu_read(xvcu->logicore_reg_ba, VCU_CORE_CLK) * MHZ;
+	mcuclk = xvcu_read(xvcu->logicore_reg_ba, VCU_MCU_CLK) * MHZ;
+	if (!mcuclk || !coreclk) {
+		dev_err(xvcu->dev, "Invalid mcu and core clock data\n");
+		return -EINVAL;
+	}
+
+	refclk = (inte * MHZ) + (deci * (MHZ / FRAC));
+	dev_dbg(xvcu->dev, "Ref clock from logicoreIP is %uHz\n", refclk);
+	dev_dbg(xvcu->dev, "Core clock from logicoreIP is %uHz\n", coreclk);
+	dev_dbg(xvcu->dev, "Mcu clock from logicoreIP is %uHz\n", mcuclk);
+
+	clk_disable_unprepare(xvcu->pll_ref);
+	ret = clk_set_rate(xvcu->pll_ref, refclk);
+	if (ret)
+		dev_warn(xvcu->dev, "failed to set logicoreIP refclk rate\n");
+
+	ret = clk_prepare_enable(xvcu->pll_ref);
+	if (ret) {
+		dev_err(xvcu->dev, "failed to enable pll_ref clock source\n");
+		return ret;
+	}
+
+	refclk = clk_get_rate(xvcu->pll_ref);
+
+	/*
+	 * The divide-by-2 should be always enabled (==1)
+	 * to meet the timing in the design.
+	 * Otherwise, it's an error
+	 */
+	vcu_pll_ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_PLL_CTRL);
+	clkoutdiv = vcu_pll_ctrl >> VCU_PLL_CTRL_CLKOUTDIV_SHIFT;
+	clkoutdiv = clkoutdiv & VCU_PLL_CTRL_CLKOUTDIV_MASK;
+	if (clkoutdiv != 1) {
+		dev_err(xvcu->dev, "clkoutdiv value is invalid\n");
+		return -EINVAL;
+	}
+
+	for (i = ARRAY_SIZE(xvcu_pll_cfg) - 1; i >= 0; i--) {
+		const struct xvcu_pll_cfg *cfg = &xvcu_pll_cfg[i];
+
+		fvco = cfg->fbdiv * refclk;
+		if (fvco >= FVCO_MIN && fvco <= FVCO_MAX) {
+			pll_clk = fvco / VCU_PLL_DIV2;
+			if (fvco % VCU_PLL_DIV2 != 0)
+				pll_clk++;
+			mod = pll_clk % coreclk;
+			if (mod < LIMIT) {
+				divisor_core = pll_clk / coreclk;
+			} else if (coreclk - mod < LIMIT) {
+				divisor_core = pll_clk / coreclk;
+				divisor_core++;
+			} else {
+				continue;
+			}
+			if (divisor_core >= DIVISOR_MIN &&
+			    divisor_core <= DIVISOR_MAX) {
+				found = cfg;
+				divisor_mcu = pll_clk / mcuclk;
+				mod = pll_clk % mcuclk;
+				if (mcuclk - mod < LIMIT)
+					divisor_mcu++;
+				break;
+			}
+		}
+	}
+
+	if (!found) {
+		dev_err(xvcu->dev, "Invalid clock combination.\n");
+		return -EINVAL;
+	}
+
+	xvcu->coreclk = pll_clk / divisor_core;
+	mcuclk = pll_clk / divisor_mcu;
+	dev_dbg(xvcu->dev, "Actual Ref clock freq is %uHz\n", refclk);
+	dev_dbg(xvcu->dev, "Actual Core clock freq is %uHz\n", xvcu->coreclk);
+	dev_dbg(xvcu->dev, "Actual Mcu clock freq is %uHz\n", mcuclk);
+
+	vcu_pll_ctrl &= ~(VCU_PLL_CTRL_FBDIV_MASK << VCU_PLL_CTRL_FBDIV_SHIFT);
+	vcu_pll_ctrl |= (found->fbdiv & VCU_PLL_CTRL_FBDIV_MASK) <<
+			 VCU_PLL_CTRL_FBDIV_SHIFT;
+	vcu_pll_ctrl &= ~(VCU_PLL_CTRL_POR_IN_MASK <<
+			  VCU_PLL_CTRL_POR_IN_SHIFT);
+	vcu_pll_ctrl |= (VCU_PLL_CTRL_DEFAULT & VCU_PLL_CTRL_POR_IN_MASK) <<
+			 VCU_PLL_CTRL_POR_IN_SHIFT;
+	vcu_pll_ctrl &= ~(VCU_PLL_CTRL_PWR_POR_MASK <<
+			  VCU_PLL_CTRL_PWR_POR_SHIFT);
+	vcu_pll_ctrl |= (VCU_PLL_CTRL_DEFAULT & VCU_PLL_CTRL_PWR_POR_MASK) <<
+			 VCU_PLL_CTRL_PWR_POR_SHIFT;
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_PLL_CTRL, vcu_pll_ctrl);
+
+	/* Set divisor for the core and mcu clock */
+	ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_ENC_CORE_CTRL);
+	ctrl &= ~(VCU_PLL_DIVISOR_MASK << VCU_PLL_DIVISOR_SHIFT);
+	ctrl |= (divisor_core & VCU_PLL_DIVISOR_MASK) <<
+		 VCU_PLL_DIVISOR_SHIFT;
+	ctrl &= ~(VCU_SRCSEL_MASK << VCU_SRCSEL_SHIFT);
+	ctrl |= (VCU_SRCSEL_PLL & VCU_SRCSEL_MASK) << VCU_SRCSEL_SHIFT;
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_ENC_CORE_CTRL, ctrl);
+
+	ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_DEC_CORE_CTRL);
+	ctrl &= ~(VCU_PLL_DIVISOR_MASK << VCU_PLL_DIVISOR_SHIFT);
+	ctrl |= (divisor_core & VCU_PLL_DIVISOR_MASK) <<
+		 VCU_PLL_DIVISOR_SHIFT;
+	ctrl &= ~(VCU_SRCSEL_MASK << VCU_SRCSEL_SHIFT);
+	ctrl |= (VCU_SRCSEL_PLL & VCU_SRCSEL_MASK) << VCU_SRCSEL_SHIFT;
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_DEC_CORE_CTRL, ctrl);
+
+	ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_ENC_MCU_CTRL);
+	ctrl &= ~(VCU_PLL_DIVISOR_MASK << VCU_PLL_DIVISOR_SHIFT);
+	ctrl |= (divisor_mcu & VCU_PLL_DIVISOR_MASK) << VCU_PLL_DIVISOR_SHIFT;
+	ctrl &= ~(VCU_SRCSEL_MASK << VCU_SRCSEL_SHIFT);
+	ctrl |= (VCU_SRCSEL_PLL & VCU_SRCSEL_MASK) << VCU_SRCSEL_SHIFT;
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_ENC_MCU_CTRL, ctrl);
+
+	ctrl = xvcu_read(xvcu->vcu_slcr_ba, VCU_DEC_MCU_CTRL);
+	ctrl &= ~(VCU_PLL_DIVISOR_MASK << VCU_PLL_DIVISOR_SHIFT);
+	ctrl |= (divisor_mcu & VCU_PLL_DIVISOR_MASK) << VCU_PLL_DIVISOR_SHIFT;
+	ctrl &= ~(VCU_SRCSEL_MASK << VCU_SRCSEL_SHIFT);
+	ctrl |= (VCU_SRCSEL_PLL & VCU_SRCSEL_MASK) << VCU_SRCSEL_SHIFT;
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_DEC_MCU_CTRL, ctrl);
+
+	/* Set RES, CP, LFHF, LOCK_CNT and LOCK_DLY cfg values */
+	cfg_val = (found->res << VCU_PLL_CFG_RES_SHIFT) |
+		   (found->cp << VCU_PLL_CFG_CP_SHIFT) |
+		   (found->lfhf << VCU_PLL_CFG_LFHF_SHIFT) |
+		   (found->lock_cnt << VCU_PLL_CFG_LOCK_CNT_SHIFT) |
+		   (found->lock_dly << VCU_PLL_CFG_LOCK_DLY_SHIFT);
+	xvcu_write(xvcu->vcu_slcr_ba, VCU_PLL_CFG, cfg_val);
+
+	return 0;
+}
+
+/**
+ * xvcu_set_pll - PLL init sequence
+ * @xvcu:	Pointer to the xvcu_device structure
+ *
+ * Call the api to set the PLL info and once that is done then
+ * init the PLL sequence to make the PLL stable.
+ *
+ * Return:	Returns status, either success or error+reason
+ */
+static int xvcu_set_pll(struct xvcu_device *xvcu)
+{
+	u32 lock_status;
+	unsigned long timeout;
+	int ret;
+
+	ret = xvcu_set_vcu_pll_info(xvcu);
+	if (ret) {
+		dev_err(xvcu->dev, "failed to set pll info\n");
+		return ret;
+	}
+
+	xvcu_write_field_reg(xvcu->vcu_slcr_ba, VCU_PLL_CTRL,
+			     1, VCU_PLL_CTRL_BYPASS_MASK,
+			     VCU_PLL_CTRL_BYPASS_SHIFT);
+	xvcu_write_field_reg(xvcu->vcu_slcr_ba, VCU_PLL_CTRL,
+			     1, VCU_PLL_CTRL_RESET_MASK,
+			     VCU_PLL_CTRL_RESET_SHIFT);
+	xvcu_write_field_reg(xvcu->vcu_slcr_ba, VCU_PLL_CTRL,
+			     0, VCU_PLL_CTRL_RESET_MASK,
+			     VCU_PLL_CTRL_RESET_SHIFT);
+	/*
+	 * Defined the timeout for the max time to wait the
+	 * PLL_STATUS to be locked.
+	 */
+	timeout = jiffies + msecs_to_jiffies(2000);
+	do {
+		lock_status = xvcu_read(xvcu->vcu_slcr_ba, VCU_PLL_STATUS);
+		if (lock_status & VCU_PLL_STATUS_LOCK_STATUS_MASK) {
+			xvcu_write_field_reg(xvcu->vcu_slcr_ba, VCU_PLL_CTRL,
+					     0, VCU_PLL_CTRL_BYPASS_MASK,
+					     VCU_PLL_CTRL_BYPASS_SHIFT);
+			return 0;
+		}
+	} while (!time_after(jiffies, timeout));
+
+	/* PLL is not locked even after the timeout of the 2sec */
+	dev_err(xvcu->dev, "PLL is not locked\n");
+	return -ETIMEDOUT;
+}
+
+/**
+ * xvcu_probe - Probe existence of the logicoreIP
+ *			and initialize PLL
+ *
+ * @pdev:	Pointer to the platform_device structure
+ *
+ * Return:	Returns 0 on success
+ *		Negative error code otherwise
+ */
+static int xvcu_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct xvcu_device *xvcu;
+	int ret;
+
+	xvcu = devm_kzalloc(&pdev->dev, sizeof(*xvcu), GFP_KERNEL);
+	if (!xvcu)
+		return -ENOMEM;
+
+	xvcu->dev = &pdev->dev;
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "vcu_slcr");
+	if (!res) {
+		dev_err(&pdev->dev, "get vcu_slcr memory resource failed.\n");
+		return -ENODEV;
+	}
+
+	xvcu->vcu_slcr_ba = devm_ioremap(&pdev->dev, res->start,
+						 resource_size(res));
+	if (!xvcu->vcu_slcr_ba) {
+		dev_err(&pdev->dev, "vcu_slcr register mapping failed.\n");
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "logicore");
+	if (!res) {
+		dev_err(&pdev->dev, "get logicore memory resource failed.\n");
+		return -ENODEV;
+	}
+
+	xvcu->logicore_reg_ba = devm_ioremap(&pdev->dev, res->start,
+						     resource_size(res));
+	if (!xvcu->logicore_reg_ba) {
+		dev_err(&pdev->dev, "logicore register mapping failed.\n");
+		return -ENOMEM;
+	}
+
+	xvcu->aclk = devm_clk_get(&pdev->dev, "aclk");
+	if (IS_ERR(xvcu->aclk)) {
+		dev_err(&pdev->dev, "Could not get aclk clock\n");
+		return PTR_ERR(xvcu->aclk);
+	}
+
+	xvcu->pll_ref = devm_clk_get(&pdev->dev, "pll_ref");
+	if (IS_ERR(xvcu->pll_ref)) {
+		dev_err(&pdev->dev, "Could not get pll_ref clock\n");
+		return PTR_ERR(xvcu->pll_ref);
+	}
+
+	ret = clk_prepare_enable(xvcu->aclk);
+	if (ret) {
+		dev_err(&pdev->dev, "aclk clock enable failed\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(xvcu->pll_ref);
+	if (ret) {
+		dev_err(&pdev->dev, "pll_ref clock enable failed\n");
+		goto error_aclk;
+	}
+
+	/*
+	 * Do the Gasket isolation and put the VCU out of reset
+	 * Bit 0 : Gasket isolation
+	 * Bit 1 : put VCU out of reset
+	 */
+	xvcu_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, VCU_GASKET_VALUE);
+
+	/* Do the PLL Settings based on the ref clk,core and mcu clk freq */
+	ret = xvcu_set_pll(xvcu);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to set the pll\n");
+		goto error_pll_ref;
+	}
+
+	dev_set_drvdata(&pdev->dev, xvcu);
+
+	dev_info(&pdev->dev, "%s: Probed successfully\n", __func__);
+
+	return 0;
+
+error_pll_ref:
+	clk_disable_unprepare(xvcu->pll_ref);
+error_aclk:
+	clk_disable_unprepare(xvcu->aclk);
+	return ret;
+}
+
+/**
+ * xvcu_remove - Insert gasket isolation
+ *			and disable the clock
+ * @pdev:	Pointer to the platform_device structure
+ *
+ * Return:	Returns 0 on success
+ *		Negative error code otherwise
+ */
+static int xvcu_remove(struct platform_device *pdev)
+{
+	struct xvcu_device *xvcu;
+
+	xvcu = platform_get_drvdata(pdev);
+	if (!xvcu)
+		return -ENODEV;
+
+	/* Add the the Gasket isolation and put the VCU in reset. */
+	xvcu_write(xvcu->logicore_reg_ba, VCU_GASKET_INIT, 0);
+
+	clk_disable_unprepare(xvcu->pll_ref);
+	clk_disable_unprepare(xvcu->aclk);
+
+	return 0;
+}
+
+static const struct of_device_id xvcu_of_id_table[] = {
+	{ .compatible = "xlnx,vcu" },
+	{ .compatible = "xlnx,vcu-logicoreip-1.0" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, xvcu_of_id_table);
+
+static struct platform_driver xvcu_driver = {
+	.driver = {
+		.name           = "xilinx-vcu",
+		.of_match_table = xvcu_of_id_table,
+	},
+	.probe                  = xvcu_probe,
+	.remove                 = xvcu_remove,
+};
+
+module_platform_driver(xvcu_driver);
+
+MODULE_AUTHOR("Dhaval Shah <dshah@xilinx.com>");
+MODULE_DESCRIPTION("Xilinx VCU init Driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/soc/xilinx/zynqmp_pm_domains.c b/drivers/soc/xilinx/zynqmp_pm_domains.c
new file mode 100644
index 000000000..226d343f0
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp_pm_domains.c
@@ -0,0 +1,311 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP Generic PM domain support
+ *
+ *  Copyright (C) 2015-2019 Xilinx, Inc.
+ *
+ *  Davorin Mista <davorin.mista@aggios.com>
+ *  Jolly Shah <jollys@xilinx.com>
+ *  Rajan Vaja <rajan.vaja@xilinx.com>
+ */
+
+#include <linux/err.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+#include <linux/firmware/xlnx-zynqmp.h>
+
+#define ZYNQMP_NUM_DOMAINS		(100)
+/* Flag stating if PM nodes mapped to the PM domain has been requested */
+#define ZYNQMP_PM_DOMAIN_REQUESTED	BIT(0)
+
+static int min_capability;
+
+/**
+ * struct zynqmp_pm_domain - Wrapper around struct generic_pm_domain
+ * @gpd:		Generic power domain
+ * @node_id:		PM node ID corresponding to device inside PM domain
+ * @flags:		ZynqMP PM domain flags
+ */
+struct zynqmp_pm_domain {
+	struct generic_pm_domain gpd;
+	u32 node_id;
+	u8 flags;
+};
+
+/**
+ * zynqmp_gpd_is_active_wakeup_path() - Check if device is in wakeup source
+ *					path
+ * @dev:	Device to check for wakeup source path
+ * @not_used:	Data member (not required)
+ *
+ * This function is checks device's child hierarchy and checks if any device is
+ * set as wakeup source.
+ *
+ * Return: 1 if device is in wakeup source path else 0
+ */
+static int zynqmp_gpd_is_active_wakeup_path(struct device *dev, void *not_used)
+{
+	int may_wakeup;
+
+	may_wakeup = device_may_wakeup(dev);
+	if (may_wakeup)
+		return may_wakeup;
+
+	return device_for_each_child(dev, NULL,
+			zynqmp_gpd_is_active_wakeup_path);
+}
+
+/**
+ * zynqmp_gpd_power_on() - Power on PM domain
+ * @domain:	Generic PM domain
+ *
+ * This function is called before devices inside a PM domain are resumed, to
+ * power on PM domain.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int zynqmp_gpd_power_on(struct generic_pm_domain *domain)
+{
+	int ret;
+	struct zynqmp_pm_domain *pd;
+
+	pd = container_of(domain, struct zynqmp_pm_domain, gpd);
+	ret = zynqmp_pm_set_requirement(pd->node_id,
+					ZYNQMP_PM_CAPABILITY_ACCESS,
+					ZYNQMP_PM_MAX_QOS,
+					ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+	if (ret) {
+		pr_err("%s() %s set requirement for node %d failed: %d\n",
+		       __func__, domain->name, pd->node_id, ret);
+		return ret;
+	}
+
+	pr_debug("%s() Powered on %s domain\n", __func__, domain->name);
+	return 0;
+}
+
+/**
+ * zynqmp_gpd_power_off() - Power off PM domain
+ * @domain:	Generic PM domain
+ *
+ * This function is called after devices inside a PM domain are suspended, to
+ * power off PM domain.
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int zynqmp_gpd_power_off(struct generic_pm_domain *domain)
+{
+	int ret;
+	struct pm_domain_data *pdd, *tmp;
+	struct zynqmp_pm_domain *pd;
+	u32 capabilities = min_capability;
+	bool may_wakeup;
+
+	pd = container_of(domain, struct zynqmp_pm_domain, gpd);
+
+	/* If domain is already released there is nothing to be done */
+	if (!(pd->flags & ZYNQMP_PM_DOMAIN_REQUESTED)) {
+		pr_debug("%s() %s domain is already released\n",
+			 __func__, domain->name);
+		return 0;
+	}
+
+	list_for_each_entry_safe(pdd, tmp, &domain->dev_list, list_node) {
+		/* If device is in wakeup path, set capability to WAKEUP */
+		may_wakeup = zynqmp_gpd_is_active_wakeup_path(pdd->dev, NULL);
+		if (may_wakeup) {
+			dev_dbg(pdd->dev, "device is in wakeup path in %s\n",
+				domain->name);
+			capabilities = ZYNQMP_PM_CAPABILITY_WAKEUP;
+			break;
+		}
+	}
+
+	ret = zynqmp_pm_set_requirement(pd->node_id, capabilities, 0,
+					ZYNQMP_PM_REQUEST_ACK_NO);
+	/**
+	 * If powering down of any node inside this domain fails,
+	 * report and return the error
+	 */
+	if (ret) {
+		pr_err("%s() %s set requirement for node %d failed: %d\n",
+		       __func__, domain->name, pd->node_id, ret);
+		return ret;
+	}
+
+	pr_debug("%s() Powered off %s domain\n", __func__, domain->name);
+	return 0;
+}
+
+/**
+ * zynqmp_gpd_attach_dev() - Attach device to the PM domain
+ * @domain:	Generic PM domain
+ * @dev:	Device to attach
+ *
+ * Return: 0 on success, error code otherwise
+ */
+static int zynqmp_gpd_attach_dev(struct generic_pm_domain *domain,
+				 struct device *dev)
+{
+	int ret;
+	struct zynqmp_pm_domain *pd;
+
+	pd = container_of(domain, struct zynqmp_pm_domain, gpd);
+
+	/* If this is not the first device to attach there is nothing to do */
+	if (domain->device_count)
+		return 0;
+
+	ret = zynqmp_pm_request_node(pd->node_id, 0, 0,
+				     ZYNQMP_PM_REQUEST_ACK_BLOCKING);
+	/* If requesting a node fails print and return the error */
+	if (ret) {
+		pr_err("%s() %s request failed for node %d: %d\n",
+		       __func__, domain->name, pd->node_id, ret);
+		return ret;
+	}
+
+	pd->flags |= ZYNQMP_PM_DOMAIN_REQUESTED;
+
+	pr_debug("%s() %s attached to %s domain\n", __func__,
+		 dev_name(dev), domain->name);
+	return 0;
+}
+
+/**
+ * zynqmp_gpd_detach_dev() - Detach device from the PM domain
+ * @domain:	Generic PM domain
+ * @dev:	Device to detach
+ */
+static void zynqmp_gpd_detach_dev(struct generic_pm_domain *domain,
+				  struct device *dev)
+{
+	int ret;
+	struct zynqmp_pm_domain *pd;
+
+	pd = container_of(domain, struct zynqmp_pm_domain, gpd);
+
+	/* If this is not the last device to detach there is nothing to do */
+	if (domain->device_count)
+		return;
+
+	ret = zynqmp_pm_release_node(pd->node_id);
+	/* If releasing a node fails print the error and return */
+	if (ret) {
+		pr_err("%s() %s release failed for node %d: %d\n",
+		       __func__, domain->name, pd->node_id, ret);
+		return;
+	}
+
+	pd->flags &= ~ZYNQMP_PM_DOMAIN_REQUESTED;
+
+	pr_debug("%s() %s detached from %s domain\n", __func__,
+		 dev_name(dev), domain->name);
+}
+
+static struct generic_pm_domain *zynqmp_gpd_xlate
+				(struct of_phandle_args *genpdspec, void *data)
+{
+	struct genpd_onecell_data *genpd_data = data;
+	unsigned int i, idx = genpdspec->args[0];
+	struct zynqmp_pm_domain *pd;
+
+	pd = container_of(genpd_data->domains[0], struct zynqmp_pm_domain, gpd);
+
+	if (genpdspec->args_count != 1)
+		return ERR_PTR(-EINVAL);
+
+	/* Check for existing pm domains */
+	for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++) {
+		if (pd[i].node_id == idx)
+			goto done;
+	}
+
+	/**
+	 * Add index in empty node_id of power domain list as no existing
+	 * power domain found for current index.
+	 */
+	for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++) {
+		if (pd[i].node_id == 0) {
+			pd[i].node_id = idx;
+			break;
+		}
+	}
+
+done:
+	if (!genpd_data->domains[i] || i == ZYNQMP_NUM_DOMAINS)
+		return ERR_PTR(-ENOENT);
+
+	return genpd_data->domains[i];
+}
+
+static int zynqmp_gpd_probe(struct platform_device *pdev)
+{
+	int i;
+	struct genpd_onecell_data *zynqmp_pd_data;
+	struct generic_pm_domain **domains;
+	struct zynqmp_pm_domain *pd;
+	struct device *dev = &pdev->dev;
+
+	pd = devm_kcalloc(dev, ZYNQMP_NUM_DOMAINS, sizeof(*pd), GFP_KERNEL);
+	if (!pd)
+		return -ENOMEM;
+
+	zynqmp_pd_data = devm_kzalloc(dev, sizeof(*zynqmp_pd_data), GFP_KERNEL);
+	if (!zynqmp_pd_data)
+		return -ENOMEM;
+
+	zynqmp_pd_data->xlate = zynqmp_gpd_xlate;
+
+	domains = devm_kcalloc(dev, ZYNQMP_NUM_DOMAINS, sizeof(*domains),
+			       GFP_KERNEL);
+	if (!domains)
+		return -ENOMEM;
+
+	if (!of_device_is_compatible(dev->parent->of_node,
+				     "xlnx,zynqmp-firmware"))
+		min_capability = ZYNQMP_PM_CAPABILITY_UNUSABLE;
+
+	for (i = 0; i < ZYNQMP_NUM_DOMAINS; i++, pd++) {
+		pd->node_id = 0;
+		pd->gpd.name = kasprintf(GFP_KERNEL, "domain%d", i);
+		pd->gpd.power_off = zynqmp_gpd_power_off;
+		pd->gpd.power_on = zynqmp_gpd_power_on;
+		pd->gpd.attach_dev = zynqmp_gpd_attach_dev;
+		pd->gpd.detach_dev = zynqmp_gpd_detach_dev;
+
+		domains[i] = &pd->gpd;
+
+		/* Mark all PM domains as initially powered off */
+		pm_genpd_init(&pd->gpd, NULL, true);
+	}
+
+	zynqmp_pd_data->domains = domains;
+	zynqmp_pd_data->num_domains = ZYNQMP_NUM_DOMAINS;
+	of_genpd_add_provider_onecell(dev->parent->of_node, zynqmp_pd_data);
+
+	return 0;
+}
+
+static int zynqmp_gpd_remove(struct platform_device *pdev)
+{
+	of_genpd_del_provider(pdev->dev.parent->of_node);
+
+	return 0;
+}
+
+static struct platform_driver zynqmp_power_domain_driver = {
+	.driver	= {
+		.name = "zynqmp_power_controller",
+	},
+	.probe = zynqmp_gpd_probe,
+	.remove = zynqmp_gpd_remove,
+};
+module_platform_driver(zynqmp_power_domain_driver);
+
+MODULE_ALIAS("platform:zynqmp_power_controller");
diff --git a/drivers/soc/xilinx/zynqmp_power.c b/drivers/soc/xilinx/zynqmp_power.c
new file mode 100644
index 000000000..c556623da
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp_power.c
@@ -0,0 +1,263 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Zynq MPSoC Power Management
+ *
+ *  Copyright (C) 2014-2019 Xilinx, Inc.
+ *
+ *  Davorin Mista <davorin.mista@aggios.com>
+ *  Jolly Shah <jollys@xilinx.com>
+ *  Rajan Vaja <rajan.vaja@xilinx.com>
+ */
+
+#include <linux/mailbox_client.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/suspend.h>
+
+#include <linux/firmware/xlnx-zynqmp.h>
+#include <linux/mailbox/zynqmp-ipi-message.h>
+
+/**
+ * struct zynqmp_pm_work_struct - Wrapper for struct work_struct
+ * @callback_work:	Work structure
+ * @args:		Callback arguments
+ */
+struct zynqmp_pm_work_struct {
+	struct work_struct callback_work;
+	u32 args[CB_ARG_CNT];
+};
+
+static struct zynqmp_pm_work_struct *zynqmp_pm_init_suspend_work;
+static struct mbox_chan *rx_chan;
+
+enum pm_suspend_mode {
+	PM_SUSPEND_MODE_FIRST = 0,
+	PM_SUSPEND_MODE_STD = PM_SUSPEND_MODE_FIRST,
+	PM_SUSPEND_MODE_POWER_OFF,
+};
+
+#define PM_SUSPEND_MODE_FIRST	PM_SUSPEND_MODE_STD
+
+static const char *const suspend_modes[] = {
+	[PM_SUSPEND_MODE_STD] = "standard",
+	[PM_SUSPEND_MODE_POWER_OFF] = "power-off",
+};
+
+static enum pm_suspend_mode suspend_mode = PM_SUSPEND_MODE_STD;
+
+enum pm_api_cb_id {
+	PM_INIT_SUSPEND_CB = 30,
+	PM_ACKNOWLEDGE_CB,
+	PM_NOTIFY_CB,
+};
+
+static void zynqmp_pm_get_callback_data(u32 *buf)
+{
+	zynqmp_pm_invoke_fn(GET_CALLBACK_DATA, 0, 0, 0, 0, buf);
+}
+
+static irqreturn_t zynqmp_pm_isr(int irq, void *data)
+{
+	u32 payload[CB_PAYLOAD_SIZE];
+
+	zynqmp_pm_get_callback_data(payload);
+
+	/* First element is callback API ID, others are callback arguments */
+	if (payload[0] == PM_INIT_SUSPEND_CB) {
+		switch (payload[1]) {
+		case SUSPEND_SYSTEM_SHUTDOWN:
+			orderly_poweroff(true);
+			break;
+		case SUSPEND_POWER_REQUEST:
+			pm_suspend(PM_SUSPEND_MEM);
+			break;
+		default:
+			pr_err("%s Unsupported InitSuspendCb reason "
+				"code %d\n", __func__, payload[1]);
+		}
+	}
+
+	return IRQ_HANDLED;
+}
+
+static void ipi_receive_callback(struct mbox_client *cl, void *data)
+{
+	struct zynqmp_ipi_message *msg = (struct zynqmp_ipi_message *)data;
+	u32 payload[CB_PAYLOAD_SIZE];
+	int ret;
+
+	memcpy(payload, msg->data, sizeof(msg->len));
+	/* First element is callback API ID, others are callback arguments */
+	if (payload[0] == PM_INIT_SUSPEND_CB) {
+		if (work_pending(&zynqmp_pm_init_suspend_work->callback_work))
+			return;
+
+		/* Copy callback arguments into work's structure */
+		memcpy(zynqmp_pm_init_suspend_work->args, &payload[1],
+		       sizeof(zynqmp_pm_init_suspend_work->args));
+
+		queue_work(system_unbound_wq,
+			   &zynqmp_pm_init_suspend_work->callback_work);
+
+		/* Send NULL message to mbox controller to ack the message */
+		ret = mbox_send_message(rx_chan, NULL);
+		if (ret)
+			pr_err("IPI ack failed. Error %d\n", ret);
+	}
+}
+
+/**
+ * zynqmp_pm_init_suspend_work_fn - Initialize suspend
+ * @work:	Pointer to work_struct
+ *
+ * Bottom-half of PM callback IRQ handler.
+ */
+static void zynqmp_pm_init_suspend_work_fn(struct work_struct *work)
+{
+	struct zynqmp_pm_work_struct *pm_work =
+		container_of(work, struct zynqmp_pm_work_struct, callback_work);
+
+	if (pm_work->args[0] == SUSPEND_SYSTEM_SHUTDOWN) {
+		orderly_poweroff(true);
+	} else if (pm_work->args[0] == SUSPEND_POWER_REQUEST) {
+		pm_suspend(PM_SUSPEND_MEM);
+	} else {
+		pr_err("%s Unsupported InitSuspendCb reason code %d.\n",
+		       __func__, pm_work->args[0]);
+	}
+}
+
+static ssize_t suspend_mode_show(struct device *dev,
+				 struct device_attribute *attr, char *buf)
+{
+	char *s = buf;
+	int md;
+
+	for (md = PM_SUSPEND_MODE_FIRST; md < ARRAY_SIZE(suspend_modes); md++)
+		if (suspend_modes[md]) {
+			if (md == suspend_mode)
+				s += sprintf(s, "[%s] ", suspend_modes[md]);
+			else
+				s += sprintf(s, "%s ", suspend_modes[md]);
+		}
+
+	/* Convert last space to newline */
+	if (s != buf)
+		*(s - 1) = '\n';
+	return (s - buf);
+}
+
+static ssize_t suspend_mode_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf, size_t count)
+{
+	int md, ret = -EINVAL;
+
+	for (md = PM_SUSPEND_MODE_FIRST; md < ARRAY_SIZE(suspend_modes); md++)
+		if (suspend_modes[md] &&
+		    sysfs_streq(suspend_modes[md], buf)) {
+			ret = 0;
+			break;
+		}
+
+	if (!ret && md != suspend_mode) {
+		ret = zynqmp_pm_set_suspend_mode(md);
+		if (likely(!ret))
+			suspend_mode = md;
+	}
+
+	return ret ? ret : count;
+}
+
+static DEVICE_ATTR_RW(suspend_mode);
+
+static int zynqmp_pm_probe(struct platform_device *pdev)
+{
+	int ret, irq;
+	u32 pm_api_version;
+	struct mbox_client *client;
+
+	zynqmp_pm_init_finalize();
+	zynqmp_pm_get_api_version(&pm_api_version);
+
+	/* Check PM API version number */
+	if (pm_api_version < ZYNQMP_PM_VERSION)
+		return -ENODEV;
+
+	if (of_find_property(pdev->dev.of_node, "mboxes", NULL)) {
+		zynqmp_pm_init_suspend_work =
+			devm_kzalloc(&pdev->dev,
+				     sizeof(struct zynqmp_pm_work_struct),
+				     GFP_KERNEL);
+		if (!zynqmp_pm_init_suspend_work)
+			return -ENOMEM;
+
+		INIT_WORK(&zynqmp_pm_init_suspend_work->callback_work,
+			  zynqmp_pm_init_suspend_work_fn);
+		client = devm_kzalloc(&pdev->dev, sizeof(*client), GFP_KERNEL);
+		if (!client)
+			return -ENOMEM;
+
+		client->dev = &pdev->dev;
+		client->rx_callback = ipi_receive_callback;
+
+		rx_chan = mbox_request_channel_byname(client, "rx");
+		if (IS_ERR(rx_chan)) {
+			dev_err(&pdev->dev, "Failed to request rx channel\n");
+			return PTR_ERR(rx_chan);
+		}
+	} else if (of_find_property(pdev->dev.of_node, "interrupts", NULL)) {
+		irq = platform_get_irq(pdev, 0);
+		if (irq <= 0)
+			return -ENXIO;
+
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+						zynqmp_pm_isr,
+						IRQF_NO_SUSPEND | IRQF_ONESHOT,
+						dev_name(&pdev->dev),
+						&pdev->dev);
+		if (ret) {
+			dev_err(&pdev->dev, "devm_request_threaded_irq '%d' "
+					    "failed with %d\n", irq, ret);
+			return ret;
+		}
+	} else {
+		dev_err(&pdev->dev, "Required property not found in DT node\n");
+		return -ENOENT;
+	}
+
+	ret = sysfs_create_file(&pdev->dev.kobj, &dev_attr_suspend_mode.attr);
+	if (ret) {
+		dev_err(&pdev->dev, "unable to create sysfs interface\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int zynqmp_pm_remove(struct platform_device *pdev)
+{
+	sysfs_remove_file(&pdev->dev.kobj, &dev_attr_suspend_mode.attr);
+
+	if (!rx_chan)
+		mbox_free_channel(rx_chan);
+
+	return 0;
+}
+
+static const struct of_device_id pm_of_match[] = {
+	{ .compatible = "xlnx,zynqmp-power", },
+	{ /* end of table */ },
+};
+MODULE_DEVICE_TABLE(of, pm_of_match);
+
+static struct platform_driver zynqmp_pm_platform_driver = {
+	.probe = zynqmp_pm_probe,
+	.remove = zynqmp_pm_remove,
+	.driver = {
+		.name = "zynqmp_power",
+		.of_match_table = pm_of_match,
+	},
+};
+module_platform_driver(zynqmp_pm_platform_driver);