Merge tag 'zynqmp-soc-for-v5.1' of https://github.com/Xilinx/linux-xlnx into arm/drivers

arm64: zynqmp: SoC changes for v5.1

- Extend firmware interface with reset, nvmem,
  power management and power domain support

- Add reset, nvmem driver, power management and
  power domain drivers
-

* tag 'zynqmp-soc-for-v5.1' of https://github.com/Xilinx/linux-xlnx:
  drivers: soc: xilinx: Add ZynqMP power domain driver
  firmware: xilinx: Add APIs to control node status/power
  dt-bindings: power: Add ZynqMP power domain bindings
  drivers: soc: xilinx: Add ZynqMP PM driver
  firmware: xilinx: Implement ZynqMP power management APIs
  dt-bindings: soc: Add ZynqMP PM bindings
  nvmem: zynqmp: Added zynqmp nvmem firmware driver
  dt-bindings: nvmem: Add bindings for ZynqMP nvmem driver
  firmware: xilinx: Add zynqmp_pm_get_chipid() API
  reset: reset-zynqmp: Adding support for Xilinx zynqmp reset controller.
  dt-bindings: reset: Add bindings for ZynqMP reset driver
  firmware: xilinx: Add reset API's

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

11 files changed, 901 insertions, 0 deletions

diff --git a/drivers/firmware/xilinx/Kconfig b/drivers/firmware/xilinx/Kconfig
index 8f44b9cd295a..bd33bbf70daf 100644
--- a/drivers/firmware/xilinx/Kconfig
+++ b/drivers/firmware/xilinx/Kconfig
@@ -6,6 +6,7 @@ menu "Zynq MPSoC Firmware Drivers"
 
 config ZYNQMP_FIRMWARE
 	bool "Enable Xilinx Zynq MPSoC firmware interface"
+	select MFD_CORE
 	help
 	  Firmware interface driver is used by different
 	  drivers to communicate with the firmware for
diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zynqmp.c
index 9a1c72a9280f..98f936125643 100644
--- a/drivers/firmware/xilinx/zynqmp.c
+++ b/drivers/firmware/xilinx/zynqmp.c
@@ -14,6 +14,7 @@
 #include <linux/compiler.h>
 #include <linux/device.h>
 #include <linux/init.h>
+#include <linux/mfd/core.h>
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_platform.h>
@@ -23,6 +24,12 @@
 #include <linux/firmware/xlnx-zynqmp.h>
 #include "zynqmp-debug.h"
 
+static const struct mfd_cell firmware_devs[] = {
+	{
+		.name = "zynqmp_power_controller",
+	},
+};
+
 /**
  * zynqmp_pm_ret_code() - Convert PMU-FW error codes to Linux error codes
  * @ret_status:		PMUFW return code
@@ -187,6 +194,29 @@ static int zynqmp_pm_get_api_version(u32 *version)
 }
 
 /**
+ * zynqmp_pm_get_chipid - Get silicon ID registers
+ * @idcode:     IDCODE register
+ * @version:    version register
+ *
+ * Return:      Returns the status of the operation and the idcode and version
+ *              registers in @idcode and @version.
+ */
+static int zynqmp_pm_get_chipid(u32 *idcode, u32 *version)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	if (!idcode || !version)
+		return -EINVAL;
+
+	ret = zynqmp_pm_invoke_fn(PM_GET_CHIPID, 0, 0, 0, 0, ret_payload);
+	*idcode = ret_payload[1];
+	*version = ret_payload[2];
+
+	return ret;
+}
+
+/**
  * zynqmp_pm_get_trustzone_version() - Get secure trustzone firmware version
  * @version:	Returned version value
  *
@@ -469,8 +499,129 @@ static int zynqmp_pm_ioctl(u32 node_id, u32 ioctl_id, u32 arg1, u32 arg2,
 				   arg1, arg2, out);
 }
 
+/**
+ * zynqmp_pm_reset_assert - Request setting of reset (1 - assert, 0 - release)
+ * @reset:		Reset to be configured
+ * @assert_flag:	Flag stating should reset be asserted (1) or
+ *			released (0)
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_reset_assert(const enum zynqmp_pm_reset reset,
+				  const enum zynqmp_pm_reset_action assert_flag)
+{
+	return zynqmp_pm_invoke_fn(PM_RESET_ASSERT, reset, assert_flag,
+				   0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_reset_get_status - Get status of the reset
+ * @reset:      Reset whose status should be returned
+ * @status:     Returned status
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_reset_get_status(const enum zynqmp_pm_reset reset,
+				      u32 *status)
+{
+	u32 ret_payload[PAYLOAD_ARG_CNT];
+	int ret;
+
+	if (!status)
+		return -EINVAL;
+
+	ret = zynqmp_pm_invoke_fn(PM_RESET_GET_STATUS, reset, 0,
+				  0, 0, ret_payload);
+	*status = ret_payload[1];
+
+	return ret;
+}
+
+/**
+ * zynqmp_pm_init_finalize() - PM call to inform firmware that the caller
+ *			       master has initialized its own power management
+ *
+ * This API function is to be used for notify the power management controller
+ * about the completed power management initialization.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_init_finalize(void)
+{
+	return zynqmp_pm_invoke_fn(PM_PM_INIT_FINALIZE, 0, 0, 0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_set_suspend_mode()	- Set system suspend mode
+ * @mode:	Mode to set for system suspend
+ *
+ * This API function is used to set mode of system suspend.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_set_suspend_mode(u32 mode)
+{
+	return zynqmp_pm_invoke_fn(PM_SET_SUSPEND_MODE, mode, 0, 0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_request_node() - Request a node with specific capabilities
+ * @node:		Node ID of the slave
+ * @capabilities:	Requested capabilities of the slave
+ * @qos:		Quality of service (not supported)
+ * @ack:		Flag to specify whether acknowledge is requested
+ *
+ * This function is used by master to request particular node from firmware.
+ * Every master must request node before using it.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_request_node(const u32 node, const u32 capabilities,
+				  const u32 qos,
+				  const enum zynqmp_pm_request_ack ack)
+{
+	return zynqmp_pm_invoke_fn(PM_REQUEST_NODE, node, capabilities,
+				   qos, ack, NULL);
+}
+
+/**
+ * zynqmp_pm_release_node() - Release a node
+ * @node:	Node ID of the slave
+ *
+ * This function is used by master to inform firmware that master
+ * has released node. Once released, master must not use that node
+ * without re-request.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_release_node(const u32 node)
+{
+	return zynqmp_pm_invoke_fn(PM_RELEASE_NODE, node, 0, 0, 0, NULL);
+}
+
+/**
+ * zynqmp_pm_set_requirement() - PM call to set requirement for PM slaves
+ * @node:		Node ID of the slave
+ * @capabilities:	Requested capabilities of the slave
+ * @qos:		Quality of service (not supported)
+ * @ack:		Flag to specify whether acknowledge is requested
+ *
+ * This API function is to be used for slaves a PU already has requested
+ * to change its capabilities.
+ *
+ * Return: Returns status, either success or error+reason
+ */
+static int zynqmp_pm_set_requirement(const u32 node, const u32 capabilities,
+				     const u32 qos,
+				     const enum zynqmp_pm_request_ack ack)
+{
+	return zynqmp_pm_invoke_fn(PM_SET_REQUIREMENT, node, capabilities,
+				   qos, ack, NULL);
+}
+
 static const struct zynqmp_eemi_ops eemi_ops = {
 	.get_api_version = zynqmp_pm_get_api_version,
+	.get_chipid = zynqmp_pm_get_chipid,
 	.query_data = zynqmp_pm_query_data,
 	.clock_enable = zynqmp_pm_clock_enable,
 	.clock_disable = zynqmp_pm_clock_disable,
@@ -482,6 +633,13 @@ static const struct zynqmp_eemi_ops eemi_ops = {
 	.clock_setparent = zynqmp_pm_clock_setparent,
 	.clock_getparent = zynqmp_pm_clock_getparent,
 	.ioctl = zynqmp_pm_ioctl,
+	.reset_assert = zynqmp_pm_reset_assert,
+	.reset_get_status = zynqmp_pm_reset_get_status,
+	.init_finalize = zynqmp_pm_init_finalize,
+	.set_suspend_mode = zynqmp_pm_set_suspend_mode,
+	.request_node = zynqmp_pm_request_node,
+	.release_node = zynqmp_pm_release_node,
+	.set_requirement = zynqmp_pm_set_requirement,
 };
 
 /**
@@ -538,11 +696,19 @@ static int zynqmp_firmware_probe(struct platform_device *pdev)
 
 	zynqmp_pm_api_debugfs_init();
 
+	ret = mfd_add_devices(&pdev->dev, PLATFORM_DEVID_NONE, firmware_devs,
+			      ARRAY_SIZE(firmware_devs), NULL, 0, NULL);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to add MFD devices %d\n", ret);
+		return ret;
+	}
+
 	return of_platform_populate(dev->of_node, NULL, NULL, dev);
 }
 
 static int zynqmp_firmware_remove(struct platform_device *pdev)
 {
+	mfd_remove_devices(&pdev->dev);
 	zynqmp_pm_api_debugfs_exit();
 
 	return 0;
diff --git a/drivers/nvmem/Kconfig b/drivers/nvmem/Kconfig
index 0a7a470ee859..4ad846ceac7c 100644
--- a/drivers/nvmem/Kconfig
+++ b/drivers/nvmem/Kconfig
@@ -192,4 +192,14 @@ config SC27XX_EFUSE
 	  This driver can also be built as a module. If so, the module
 	  will be called nvmem-sc27xx-efuse.
 
+config NVMEM_ZYNQMP
+	bool "Xilinx ZYNQMP SoC nvmem firmware support"
+	depends on ARCH_ZYNQMP
+	help
+	  This is a driver to access hardware related data like
+	  soc revision, IDCODE... etc by using the firmware
+	  interface.
+
+	  If sure, say yes. If unsure, say no.
+
 endif
diff --git a/drivers/nvmem/Makefile b/drivers/nvmem/Makefile
index 4e8c61628f1a..2ece8ffffdda 100644
--- a/drivers/nvmem/Makefile
+++ b/drivers/nvmem/Makefile
@@ -41,3 +41,5 @@ obj-$(CONFIG_RAVE_SP_EEPROM)	+= nvmem-rave-sp-eeprom.o
 nvmem-rave-sp-eeprom-y		:= rave-sp-eeprom.o
 obj-$(CONFIG_SC27XX_EFUSE)	+= nvmem-sc27xx-efuse.o
 nvmem-sc27xx-efuse-y		:= sc27xx-efuse.o
+obj-$(CONFIG_NVMEM_ZYNQMP)	+= nvmem_zynqmp_nvmem.o
+nvmem_zynqmp_nvmem-y		:= zynqmp_nvmem.o
diff --git a/drivers/nvmem/zynqmp_nvmem.c b/drivers/nvmem/zynqmp_nvmem.c
new file mode 100644
index 000000000000..490c8fcaec80
--- /dev/null
+++ b/drivers/nvmem/zynqmp_nvmem.c
@@ -0,0 +1,86 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Xilinx, Inc.
+ */
+
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+
+#define SILICON_REVISION_MASK 0xF
+
+struct zynqmp_nvmem_data {
+	struct device *dev;
+	struct nvmem_device *nvmem;
+};
+
+static int zynqmp_nvmem_read(void *context, unsigned int offset,
+			     void *val, size_t bytes)
+{
+	int ret;
+	int idcode, version;
+	struct zynqmp_nvmem_data *priv = context;
+
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->get_chipid)
+		return -ENXIO;
+
+	ret = eemi_ops->get_chipid(&idcode, &version);
+	if (ret < 0)
+		return ret;
+
+	dev_dbg(priv->dev, "Read chipid val %x %x\n", idcode, version);
+	*(int *)val = version & SILICON_REVISION_MASK;
+
+	return 0;
+}
+
+static struct nvmem_config econfig = {
+	.name = "zynqmp-nvmem",
+	.owner = THIS_MODULE,
+	.word_size = 1,
+	.size = 1,
+	.read_only = true,
+};
+
+static const struct of_device_id zynqmp_nvmem_match[] = {
+	{ .compatible = "xlnx,zynqmp-nvmem-fw", },
+	{ /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, zynqmp_nvmem_match);
+
+static int zynqmp_nvmem_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct zynqmp_nvmem_data *priv;
+
+	priv = devm_kzalloc(dev, sizeof(struct zynqmp_nvmem_data), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->dev = dev;
+	econfig.dev = dev;
+	econfig.reg_read = zynqmp_nvmem_read;
+	econfig.priv = priv;
+
+	priv->nvmem = devm_nvmem_register(dev, &econfig);
+
+	return PTR_ERR_OR_ZERO(priv->nvmem);
+}
+
+static struct platform_driver zynqmp_nvmem_driver = {
+	.probe = zynqmp_nvmem_probe,
+	.driver = {
+		.name = "zynqmp-nvmem",
+		.of_match_table = zynqmp_nvmem_match,
+	},
+};
+
+module_platform_driver(zynqmp_nvmem_driver);
+
+MODULE_AUTHOR("Michal Simek <michal.simek@xilinx.com>, Nava kishore Manne <navam@xilinx.com>");
+MODULE_DESCRIPTION("ZynqMP NVMEM driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/reset/Makefile b/drivers/reset/Makefile
index dc7874df78d9..573b8386d901 100644
--- a/drivers/reset/Makefile
+++ b/drivers/reset/Makefile
@@ -26,4 +26,5 @@ obj-$(CONFIG_RESET_TI_SYSCON) += reset-ti-syscon.o
 obj-$(CONFIG_RESET_UNIPHIER) += reset-uniphier.o
 obj-$(CONFIG_RESET_UNIPHIER_GLUE) += reset-uniphier-glue.o
 obj-$(CONFIG_RESET_ZYNQ) += reset-zynq.o
+obj-$(CONFIG_ARCH_ZYNQMP) += reset-zynqmp.o
 
diff --git a/drivers/reset/reset-zynqmp.c b/drivers/reset/reset-zynqmp.c
new file mode 100644
index 000000000000..2ef1f13aa47b
--- /dev/null
+++ b/drivers/reset/reset-zynqmp.c
@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2018 Xilinx, Inc.
+ *
+ */
+
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset-controller.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+
+#define ZYNQMP_NR_RESETS (ZYNQMP_PM_RESET_END - ZYNQMP_PM_RESET_START)
+#define ZYNQMP_RESET_ID ZYNQMP_PM_RESET_START
+
+struct zynqmp_reset_data {
+	struct reset_controller_dev rcdev;
+	const struct zynqmp_eemi_ops *eemi_ops;
+};
+
+static inline struct zynqmp_reset_data *
+to_zynqmp_reset_data(struct reset_controller_dev *rcdev)
+{
+	return container_of(rcdev, struct zynqmp_reset_data, rcdev);
+}
+
+static int zynqmp_reset_assert(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);
+
+	return priv->eemi_ops->reset_assert(ZYNQMP_RESET_ID + id,
+					    PM_RESET_ACTION_ASSERT);
+}
+
+static int zynqmp_reset_deassert(struct reset_controller_dev *rcdev,
+				 unsigned long id)
+{
+	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);
+
+	return priv->eemi_ops->reset_assert(ZYNQMP_RESET_ID + id,
+					    PM_RESET_ACTION_RELEASE);
+}
+
+static int zynqmp_reset_status(struct reset_controller_dev *rcdev,
+			       unsigned long id)
+{
+	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);
+	int val, err;
+
+	err = priv->eemi_ops->reset_get_status(ZYNQMP_RESET_ID + id, &val);
+	if (err)
+		return err;
+
+	return val;
+}
+
+static int zynqmp_reset_reset(struct reset_controller_dev *rcdev,
+			      unsigned long id)
+{
+	struct zynqmp_reset_data *priv = to_zynqmp_reset_data(rcdev);
+
+	return priv->eemi_ops->reset_assert(ZYNQMP_RESET_ID + id,
+					    PM_RESET_ACTION_PULSE);
+}
+
+static struct reset_control_ops zynqmp_reset_ops = {
+	.reset = zynqmp_reset_reset,
+	.assert = zynqmp_reset_assert,
+	.deassert = zynqmp_reset_deassert,
+	.status = zynqmp_reset_status,
+};
+
+static int zynqmp_reset_probe(struct platform_device *pdev)
+{
+	struct zynqmp_reset_data *priv;
+
+	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, priv);
+
+	priv->eemi_ops = zynqmp_pm_get_eemi_ops();
+	if (!priv->eemi_ops)
+		return -ENXIO;
+
+	priv->rcdev.ops = &zynqmp_reset_ops;
+	priv->rcdev.owner = THIS_MODULE;
+	priv->rcdev.of_node = pdev->dev.of_node;
+	priv->rcdev.nr_resets = ZYNQMP_NR_RESETS;
+
+	return devm_reset_controller_register(&pdev->dev, &priv->rcdev);
+}
+
+static const struct of_device_id zynqmp_reset_dt_ids[] = {
+	{ .compatible = "xlnx,zynqmp-reset", },
+	{ /* sentinel */ },
+};
+
+static struct platform_driver zynqmp_reset_driver = {
+	.probe	= zynqmp_reset_probe,
+	.driver = {
+		.name		= KBUILD_MODNAME,
+		.of_match_table	= zynqmp_reset_dt_ids,
+	},
+};
+
+static int __init zynqmp_reset_init(void)
+{
+	return platform_driver_register(&zynqmp_reset_driver);
+}
+
+arch_initcall(zynqmp_reset_init);
diff --git a/drivers/soc/xilinx/Kconfig b/drivers/soc/xilinx/Kconfig
index 687c8f3cd955..01e76b58dd78 100644
--- a/drivers/soc/xilinx/Kconfig
+++ b/drivers/soc/xilinx/Kconfig
@@ -17,4 +17,24 @@ config XILINX_VCU
 	  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 && ARCH_ZYNQMP
+	default y
+	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.
+	  If in doubt, say N.
+
+config ZYNQMP_PM_DOMAINS
+	bool "Enable Zynq MPSoC generic PM domains"
+	default y
+	depends on PM && ARCH_ZYNQMP && 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
index dee8fd51e303..f66bfea5de17 100644
--- a/drivers/soc/xilinx/Makefile
+++ b/drivers/soc/xilinx/Makefile
@@ -1,2 +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/zynqmp_pm_domains.c b/drivers/soc/xilinx/zynqmp_pm_domains.c
new file mode 100644
index 000000000000..354d256e6e00
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp_pm_domains.c
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ZynqMP Generic PM domain support
+ *
+ *  Copyright (C) 2015-2018 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)
+
+/**
+ * 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;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->set_requirement)
+		return -ENXIO;
+
+	pd = container_of(domain, struct zynqmp_pm_domain, gpd);
+	ret = eemi_ops->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 = 0;
+	bool may_wakeup;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->set_requirement)
+		return -ENXIO;
+
+	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 = eemi_ops->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;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->request_node)
+		return -ENXIO;
+
+	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 = eemi_ops->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;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->release_node)
+		return;
+
+	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 = eemi_ops->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;
+
+	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 000000000000..771cb59b9d22
--- /dev/null
+++ b/drivers/soc/xilinx/zynqmp_power.c
@@ -0,0 +1,178 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Xilinx Zynq MPSoC Power Management
+ *
+ *  Copyright (C) 2014-2018 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>
+
+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 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;
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->set_suspend_mode)
+		return ret;
+
+	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 = eemi_ops->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;
+
+	const struct zynqmp_eemi_ops *eemi_ops = zynqmp_pm_get_eemi_ops();
+
+	if (!eemi_ops || !eemi_ops->get_api_version || !eemi_ops->init_finalize)
+		return -ENXIO;
+
+	eemi_ops->init_finalize();
+	eemi_ops->get_api_version(&pm_api_version);
+
+	/* Check PM API version number */
+	if (pm_api_version < ZYNQMP_PM_VERSION)
+		return -ENODEV;
+
+	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;
+	}
+
+	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);
+
+	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);