Adding upstream version 4.19.249.upstream/4.19.249

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

32 files changed, 4409 insertions, 0 deletions

diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
new file mode 100644
index 000000000..6533aa560
--- /dev/null
+++ b/drivers/power/reset/Kconfig
@@ -0,0 +1,249 @@
+menuconfig POWER_RESET
+	bool "Board level reset or power off"
+	help
+	  Provides a number of drivers which either reset a complete board
+	  or shut it down, by manipulating the main power supply on the board.
+
+	  Say Y here to enable board reset and power off
+
+if POWER_RESET
+
+config POWER_RESET_AS3722
+	bool "ams AS3722 power-off driver"
+	depends on MFD_AS3722
+	help
+	  This driver supports turning off board via a ams AS3722 power-off.
+
+config POWER_RESET_AT91_POWEROFF
+	tristate "Atmel AT91 poweroff driver"
+	depends on ARCH_AT91
+	default SOC_AT91SAM9 || SOC_SAMA5
+	help
+	  This driver supports poweroff for Atmel AT91SAM9 and SAMA5
+	  SoCs
+
+config POWER_RESET_AT91_RESET
+	tristate "Atmel AT91 reset driver"
+	depends on ARCH_AT91
+	default SOC_AT91SAM9 || SOC_SAMA5
+	help
+	  This driver supports restart for Atmel AT91SAM9 and SAMA5
+	  SoCs
+
+config POWER_RESET_AT91_SAMA5D2_SHDWC
+	tristate "Atmel AT91 SAMA5D2-Compatible shutdown controller driver"
+	depends on ARCH_AT91
+	default SOC_SAMA5
+	help
+	  This driver supports the alternate shutdown controller for some Atmel
+	  SAMA5 SoCs. It is present for example on SAMA5D2 SoC.
+
+config POWER_RESET_AXXIA
+	bool "LSI Axxia reset driver"
+	depends on ARCH_AXXIA
+	help
+	  This driver supports restart for Axxia SoC.
+
+	  Say Y if you have an Axxia family SoC.
+
+config POWER_RESET_BRCMKONA
+	bool "Broadcom Kona reset driver"
+	depends on ARM || COMPILE_TEST
+	default ARCH_BCM_MOBILE
+	help
+	  This driver provides restart support for Broadcom Kona chips.
+
+	  Say Y here if you have a Broadcom Kona-based board and you wish
+	  to have restart support.
+
+config POWER_RESET_BRCMSTB
+	bool "Broadcom STB reset driver"
+	depends on ARM || ARM64 || MIPS || COMPILE_TEST
+	depends on MFD_SYSCON
+	default ARCH_BRCMSTB || BMIPS_GENERIC
+	help
+	  This driver provides restart support for Broadcom STB boards.
+
+	  Say Y here if you have a Broadcom STB board and you wish
+	  to have restart support.
+
+config POWER_RESET_GEMINI_POWEROFF
+	bool "Cortina Gemini power-off driver"
+	depends on ARCH_GEMINI || COMPILE_TEST
+	depends on OF && HAS_IOMEM
+	default ARCH_GEMINI
+	help
+	  This driver supports turning off the Cortina Gemini SoC.
+	  Select this if you're building a kernel with Gemini SoC support.
+
+config POWER_RESET_GPIO
+	bool "GPIO power-off driver"
+	depends on OF_GPIO
+	help
+	  This driver supports turning off your board via a GPIO line.
+	  If your board needs a GPIO high/low to power down, say Y and
+	  create a binding in your devicetree.
+
+config POWER_RESET_GPIO_RESTART
+	bool "GPIO restart driver"
+	depends on OF_GPIO
+	help
+	  This driver supports restarting your board via a GPIO line.
+	  If your board needs a GPIO high/low to restart, say Y and
+	  create a binding in your devicetree.
+
+config POWER_RESET_HISI
+	bool "Hisilicon power-off driver"
+	depends on ARCH_HISI
+	help
+	  Reboot support for Hisilicon boards.
+
+config POWER_RESET_MSM
+	bool "Qualcomm MSM power-off driver"
+	depends on ARCH_QCOM
+	help
+	  Power off and restart support for Qualcomm boards.
+
+config POWER_RESET_QCOM_PON
+	tristate "Qualcomm power-on driver"
+	depends on ARCH_QCOM
+	depends on MFD_SPMI_PMIC
+	select REBOOT_MODE
+	help
+	  Power On support for Qualcomm boards.
+	  If you have a Qualcomm platform and need support for
+	  power-on and reboot reason, Say Y.
+	  If unsure, Say N.
+
+config POWER_RESET_OCELOT_RESET
+	bool "Microsemi Ocelot reset driver"
+	depends on MSCC_OCELOT || COMPILE_TEST
+	select MFD_SYSCON
+	help
+	  This driver supports restart for Microsemi Ocelot SoC.
+
+config POWER_RESET_PIIX4_POWEROFF
+	tristate "Intel PIIX4 power-off driver"
+	depends on PCI
+	depends on MIPS || COMPILE_TEST
+	help
+	  This driver supports powering off a system using the Intel PIIX4
+	  southbridge, for example the MIPS Malta development board. The
+	  southbridge SOff state is entered in response to a request to
+	  power off the system.
+
+config POWER_RESET_LTC2952
+	bool "LTC2952 PowerPath power-off driver"
+	depends on OF_GPIO
+	help
+	  This driver supports an external powerdown trigger and board power
+	  down via the LTC2952. Bindings are made in the device tree.
+
+config POWER_RESET_QNAP
+	bool "QNAP power-off driver"
+	depends on OF_GPIO && PLAT_ORION
+	help
+	  This driver supports turning off QNAP NAS devices by sending
+	  commands to the microcontroller which controls the main power.
+
+	  Say Y if you have a QNAP NAS.
+
+config POWER_RESET_RESTART
+	bool "Restart power-off driver"
+	help
+	  Some boards don't actually have the ability to power off.
+	  Instead they restart, and u-boot holds the SoC until the
+	  user presses a key. u-boot then boots into Linux.
+
+config POWER_RESET_ST
+	bool "ST restart driver"
+	depends on ARCH_STI
+	help
+	  Reset support for STMicroelectronics boards.
+
+config POWER_RESET_VERSATILE
+	bool "ARM Versatile family reboot driver"
+	depends on ARM
+	depends on MFD_SYSCON
+	depends on OF
+	help
+	  Power off and restart support for ARM Versatile family of
+	  reference boards.
+
+config POWER_RESET_VEXPRESS
+	bool "ARM Versatile Express power-off and reset driver"
+	depends on ARM || ARM64
+	depends on VEXPRESS_CONFIG
+	help
+	  Power off and reset support for the ARM Ltd. Versatile
+	  Express boards.
+
+config POWER_RESET_XGENE
+	bool "APM SoC X-Gene reset driver"
+	depends on ARM64
+	help
+	  Reboot support for the APM SoC X-Gene Eval boards.
+
+config POWER_RESET_KEYSTONE
+	bool "Keystone reset driver"
+	depends on ARCH_KEYSTONE || COMPILE_TEST
+	depends on HAS_IOMEM
+	select MFD_SYSCON
+	help
+	  Reboot support for the KEYSTONE SoCs.
+
+config POWER_RESET_SYSCON
+	bool "Generic SYSCON regmap reset driver"
+	depends on OF
+	depends on HAS_IOMEM
+	select MFD_SYSCON
+	help
+	  Reboot support for generic SYSCON mapped register reset.
+
+config POWER_RESET_SYSCON_POWEROFF
+	bool "Generic SYSCON regmap poweroff driver"
+	depends on OF
+	depends on HAS_IOMEM
+	select MFD_SYSCON
+	help
+	  Poweroff support for generic SYSCON mapped register poweroff.
+
+config POWER_RESET_RMOBILE
+	tristate "Renesas R-Mobile reset driver"
+	depends on ARCH_RMOBILE || COMPILE_TEST
+	depends on HAS_IOMEM
+	help
+	  Reboot support for Renesas R-Mobile and SH-Mobile SoCs.
+
+config POWER_RESET_ZX
+	tristate "ZTE SoCs reset driver"
+	depends on ARCH_ZX || COMPILE_TEST
+	depends on HAS_IOMEM
+	help
+	  Reboot support for ZTE SoCs.
+
+config REBOOT_MODE
+	tristate
+
+config SYSCON_REBOOT_MODE
+	tristate "Generic SYSCON regmap reboot mode driver"
+	depends on OF
+	depends on MFD_SYSCON
+	select REBOOT_MODE
+	help
+	  Say y here will enable reboot mode driver. This will
+	  get reboot mode arguments and store it in SYSCON mapped
+	  register, then the bootloader can read it to take different
+	  action according to the mode.
+
+config POWER_RESET_SC27XX
+	bool "Spreadtrum SC27xx PMIC power-off driver"
+	depends on MFD_SC27XX_PMIC || COMPILE_TEST
+	help
+	  This driver supports powering off a system through
+	  Spreadtrum SC27xx series PMICs. The SC27xx series
+	  PMICs includes the SC2720, SC2721, SC2723, SC2730
+	  and SC2731 chips.
+
+endif
+
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
new file mode 100644
index 000000000..0aebee954
--- /dev/null
+++ b/drivers/power/reset/Makefile
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
+obj-$(CONFIG_POWER_RESET_AT91_POWEROFF) += at91-poweroff.o
+obj-$(CONFIG_POWER_RESET_AT91_RESET) += at91-reset.o
+obj-$(CONFIG_POWER_RESET_AT91_SAMA5D2_SHDWC) += at91-sama5d2_shdwc.o
+obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o
+obj-$(CONFIG_POWER_RESET_BRCMKONA) += brcm-kona-reset.o
+obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
+obj-$(CONFIG_POWER_RESET_GEMINI_POWEROFF) += gemini-poweroff.o
+obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
+obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
+obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
+obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
+obj-$(CONFIG_POWER_RESET_QCOM_PON) += qcom-pon.o
+obj-$(CONFIG_POWER_RESET_OCELOT_RESET) += ocelot-reset.o
+obj-$(CONFIG_POWER_RESET_PIIX4_POWEROFF) += piix4-poweroff.o
+obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
+obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
+obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
+obj-$(CONFIG_POWER_RESET_ST) += st-poweroff.o
+obj-$(CONFIG_POWER_RESET_VERSATILE) += arm-versatile-reboot.o
+obj-$(CONFIG_POWER_RESET_VEXPRESS) += vexpress-poweroff.o
+obj-$(CONFIG_POWER_RESET_XGENE) += xgene-reboot.o
+obj-$(CONFIG_POWER_RESET_KEYSTONE) += keystone-reset.o
+obj-$(CONFIG_POWER_RESET_SYSCON) += syscon-reboot.o
+obj-$(CONFIG_POWER_RESET_SYSCON_POWEROFF) += syscon-poweroff.o
+obj-$(CONFIG_POWER_RESET_RMOBILE) += rmobile-reset.o
+obj-$(CONFIG_POWER_RESET_ZX) += zx-reboot.o
+obj-$(CONFIG_REBOOT_MODE) += reboot-mode.o
+obj-$(CONFIG_SYSCON_REBOOT_MODE) += syscon-reboot-mode.o
+obj-$(CONFIG_POWER_RESET_SC27XX) += sc27xx-poweroff.o
diff --git a/drivers/power/reset/arm-versatile-reboot.c b/drivers/power/reset/arm-versatile-reboot.c
new file mode 100644
index 000000000..06d34ab47
--- /dev/null
+++ b/drivers/power/reset/arm-versatile-reboot.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2014 Linaro Ltd.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2, as
+ * published by the Free Software Foundation.
+ *
+ */
+#include <linux/init.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+#define INTEGRATOR_HDR_CTRL_OFFSET	0x0C
+#define INTEGRATOR_HDR_LOCK_OFFSET	0x14
+#define INTEGRATOR_CM_CTRL_RESET	(1 << 3)
+
+#define VERSATILE_SYS_LOCK_OFFSET	0x20
+#define VERSATILE_SYS_RESETCTL_OFFSET	0x40
+
+/* Magic unlocking token used on all Versatile boards */
+#define VERSATILE_LOCK_VAL		0xA05F
+
+/*
+ * We detect the different syscon types from the compatible strings.
+ */
+enum versatile_reboot {
+	INTEGRATOR_REBOOT_CM,
+	VERSATILE_REBOOT_CM,
+	REALVIEW_REBOOT_EB,
+	REALVIEW_REBOOT_PB1176,
+	REALVIEW_REBOOT_PB11MP,
+	REALVIEW_REBOOT_PBA8,
+	REALVIEW_REBOOT_PBX,
+};
+
+/* Pointer to the system controller */
+static struct regmap *syscon_regmap;
+static enum versatile_reboot versatile_reboot_type;
+
+static const struct of_device_id versatile_reboot_of_match[] = {
+	{
+		.compatible = "arm,core-module-integrator",
+		.data = (void *)INTEGRATOR_REBOOT_CM
+	},
+	{
+		.compatible = "arm,core-module-versatile",
+		.data = (void *)VERSATILE_REBOOT_CM,
+	},
+	{
+		.compatible = "arm,realview-eb-syscon",
+		.data = (void *)REALVIEW_REBOOT_EB,
+	},
+	{
+		.compatible = "arm,realview-pb1176-syscon",
+		.data = (void *)REALVIEW_REBOOT_PB1176,
+	},
+	{
+		.compatible = "arm,realview-pb11mp-syscon",
+		.data = (void *)REALVIEW_REBOOT_PB11MP,
+	},
+	{
+		.compatible = "arm,realview-pba8-syscon",
+		.data = (void *)REALVIEW_REBOOT_PBA8,
+	},
+	{
+		.compatible = "arm,realview-pbx-syscon",
+		.data = (void *)REALVIEW_REBOOT_PBX,
+	},
+	{},
+};
+
+static int versatile_reboot(struct notifier_block *this, unsigned long mode,
+			    void *cmd)
+{
+	/* Unlock the reset register */
+	/* Then hit reset on the different machines */
+	switch (versatile_reboot_type) {
+	case INTEGRATOR_REBOOT_CM:
+		regmap_write(syscon_regmap, INTEGRATOR_HDR_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_update_bits(syscon_regmap,
+				   INTEGRATOR_HDR_CTRL_OFFSET,
+				   INTEGRATOR_CM_CTRL_RESET,
+				   INTEGRATOR_CM_CTRL_RESET);
+		break;
+	case VERSATILE_REBOOT_CM:
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_update_bits(syscon_regmap,
+				   VERSATILE_SYS_RESETCTL_OFFSET,
+				   0x0107,
+				   0x0105);
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     0);
+		break;
+	case REALVIEW_REBOOT_EB:
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_write(syscon_regmap,
+			     VERSATILE_SYS_RESETCTL_OFFSET, 0x0008);
+		break;
+	case REALVIEW_REBOOT_PB1176:
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_write(syscon_regmap,
+			     VERSATILE_SYS_RESETCTL_OFFSET, 0x0100);
+		break;
+	case REALVIEW_REBOOT_PB11MP:
+	case REALVIEW_REBOOT_PBA8:
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_write(syscon_regmap, VERSATILE_SYS_RESETCTL_OFFSET,
+			     0x0000);
+		regmap_write(syscon_regmap, VERSATILE_SYS_RESETCTL_OFFSET,
+			     0x0004);
+		break;
+	case REALVIEW_REBOOT_PBX:
+		regmap_write(syscon_regmap, VERSATILE_SYS_LOCK_OFFSET,
+			     VERSATILE_LOCK_VAL);
+		regmap_write(syscon_regmap, VERSATILE_SYS_RESETCTL_OFFSET,
+			     0x00f0);
+		regmap_write(syscon_regmap, VERSATILE_SYS_RESETCTL_OFFSET,
+			     0x00f4);
+		break;
+	}
+	dsb();
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block versatile_reboot_nb = {
+	.notifier_call = versatile_reboot,
+	.priority = 192,
+};
+
+static int __init versatile_reboot_probe(void)
+{
+	const struct of_device_id *reboot_id;
+	struct device_node *np;
+	int err;
+
+	np = of_find_matching_node_and_match(NULL, versatile_reboot_of_match,
+						 &reboot_id);
+	if (!np)
+		return -ENODEV;
+	versatile_reboot_type = (enum versatile_reboot)reboot_id->data;
+
+	syscon_regmap = syscon_node_to_regmap(np);
+	if (IS_ERR(syscon_regmap))
+		return PTR_ERR(syscon_regmap);
+
+	err = register_restart_handler(&versatile_reboot_nb);
+	if (err)
+		return err;
+
+	pr_info("versatile reboot driver registered\n");
+	return 0;
+}
+device_initcall(versatile_reboot_probe);
diff --git a/drivers/power/reset/as3722-poweroff.c b/drivers/power/reset/as3722-poweroff.c
new file mode 100644
index 000000000..60d0295ff
--- /dev/null
+++ b/drivers/power/reset/as3722-poweroff.c
@@ -0,0 +1,95 @@
+/*
+ * Power off driver for ams AS3722 device.
+ *
+ * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/mfd/as3722.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct as3722_poweroff {
+	struct device *dev;
+	struct as3722 *as3722;
+};
+
+static struct as3722_poweroff *as3722_pm_poweroff;
+
+static void as3722_pm_power_off(void)
+{
+	int ret;
+
+	if (!as3722_pm_poweroff) {
+		pr_err("AS3722 poweroff is not initialised\n");
+		return;
+	}
+
+	ret = as3722_update_bits(as3722_pm_poweroff->as3722,
+		AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
+	if (ret < 0)
+		dev_err(as3722_pm_poweroff->dev,
+			"RESET_CONTROL_REG update failed, %d\n", ret);
+}
+
+static int as3722_poweroff_probe(struct platform_device *pdev)
+{
+	struct as3722_poweroff *as3722_poweroff;
+	struct device_node *np = pdev->dev.parent->of_node;
+
+	if (!np)
+		return -EINVAL;
+
+	if (!of_property_read_bool(np, "ams,system-power-controller"))
+		return 0;
+
+	as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff),
+				GFP_KERNEL);
+	if (!as3722_poweroff)
+		return -ENOMEM;
+
+	as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
+	as3722_poweroff->dev = &pdev->dev;
+	as3722_pm_poweroff = as3722_poweroff;
+	if (!pm_power_off)
+		pm_power_off = as3722_pm_power_off;
+
+	return 0;
+}
+
+static int as3722_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == as3722_pm_power_off)
+		pm_power_off = NULL;
+	as3722_pm_poweroff = NULL;
+
+	return 0;
+}
+
+static struct platform_driver as3722_poweroff_driver = {
+	.driver = {
+		.name = "as3722-power-off",
+	},
+	.probe = as3722_poweroff_probe,
+	.remove = as3722_poweroff_remove,
+};
+
+module_platform_driver(as3722_poweroff_driver);
+
+MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device");
+MODULE_ALIAS("platform:as3722-power-off");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c
new file mode 100644
index 000000000..fb2fc8f74
--- /dev/null
+++ b/drivers/power/reset/at91-poweroff.c
@@ -0,0 +1,237 @@
+/*
+ * Atmel AT91 SAM9 SoCs reset code
+ *
+ * Copyright (C) 2007 Atmel Corporation.
+ * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
+ * Copyright (C) 2014 Free Electrons
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+
+#include <soc/at91/at91sam9_ddrsdr.h>
+
+#define AT91_SHDW_CR	0x00		/* Shut Down Control Register */
+#define AT91_SHDW_SHDW		BIT(0)			/* Shut Down command */
+#define AT91_SHDW_KEY		(0xa5 << 24)		/* KEY Password */
+
+#define AT91_SHDW_MR	0x04		/* Shut Down Mode Register */
+#define AT91_SHDW_WKMODE0	GENMASK(2, 0)		/* Wake-up 0 Mode Selection */
+#define AT91_SHDW_CPTWK0_MAX	0xf			/* Maximum Counter On Wake Up 0 */
+#define AT91_SHDW_CPTWK0	(AT91_SHDW_CPTWK0_MAX << 4) /* Counter On Wake Up 0 */
+#define AT91_SHDW_CPTWK0_(x)	((x) << 4)
+#define AT91_SHDW_RTTWKEN	BIT(16)			/* Real Time Timer Wake-up Enable */
+#define AT91_SHDW_RTCWKEN	BIT(17)			/* Real Time Clock Wake-up Enable */
+
+#define AT91_SHDW_SR	0x08		/* Shut Down Status Register */
+#define AT91_SHDW_WAKEUP0	BIT(0)			/* Wake-up 0 Status */
+#define AT91_SHDW_RTTWK		BIT(16)			/* Real-time Timer Wake-up */
+#define AT91_SHDW_RTCWK		BIT(17)			/* Real-time Clock Wake-up [SAM9RL] */
+
+enum wakeup_type {
+	AT91_SHDW_WKMODE0_NONE		= 0,
+	AT91_SHDW_WKMODE0_HIGH		= 1,
+	AT91_SHDW_WKMODE0_LOW		= 2,
+	AT91_SHDW_WKMODE0_ANYLEVEL	= 3,
+};
+
+static const char *shdwc_wakeup_modes[] = {
+	[AT91_SHDW_WKMODE0_NONE]	= "none",
+	[AT91_SHDW_WKMODE0_HIGH]	= "high",
+	[AT91_SHDW_WKMODE0_LOW]		= "low",
+	[AT91_SHDW_WKMODE0_ANYLEVEL]	= "any",
+};
+
+static void __iomem *at91_shdwc_base;
+static struct clk *sclk;
+static void __iomem *mpddrc_base;
+
+static void __init at91_wakeup_status(struct platform_device *pdev)
+{
+	const char *reason;
+	u32 reg = readl(at91_shdwc_base + AT91_SHDW_SR);
+
+	/* Simple power-on, just bail out */
+	if (!reg)
+		return;
+
+	if (reg & AT91_SHDW_RTTWK)
+		reason = "RTT";
+	else if (reg & AT91_SHDW_RTCWK)
+		reason = "RTC";
+	else
+		reason = "unknown";
+
+	dev_info(&pdev->dev, "Wake-Up source: %s\n", reason);
+}
+
+static void at91_poweroff(void)
+{
+	writel(AT91_SHDW_KEY | AT91_SHDW_SHDW, at91_shdwc_base + AT91_SHDW_CR);
+}
+
+static void at91_lpddr_poweroff(void)
+{
+	asm volatile(
+		/* Align to cache lines */
+		".balign 32\n\t"
+
+		/* Ensure AT91_SHDW_CR is in the TLB by reading it */
+		"	ldr	r6, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
+
+		/* Power down SDRAM0 */
+		"	str	%1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		/* Shutdown CPU */
+		"	str	%3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
+
+		"	b	.\n\t"
+		:
+		: "r" (mpddrc_base),
+		  "r" cpu_to_le32(AT91_DDRSDRC_LPDDR2_PWOFF),
+		  "r" (at91_shdwc_base),
+		  "r" cpu_to_le32(AT91_SHDW_KEY | AT91_SHDW_SHDW)
+		: "r6");
+}
+
+static int at91_poweroff_get_wakeup_mode(struct device_node *np)
+{
+	const char *pm;
+	unsigned int i;
+	int err;
+
+	err = of_property_read_string(np, "atmel,wakeup-mode", &pm);
+	if (err < 0)
+		return AT91_SHDW_WKMODE0_ANYLEVEL;
+
+	for (i = 0; i < ARRAY_SIZE(shdwc_wakeup_modes); i++)
+		if (!strcasecmp(pm, shdwc_wakeup_modes[i]))
+			return i;
+
+	return -ENODEV;
+}
+
+static void at91_poweroff_dt_set_wakeup_mode(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int wakeup_mode;
+	u32 mode = 0, tmp;
+
+	wakeup_mode = at91_poweroff_get_wakeup_mode(np);
+	if (wakeup_mode < 0) {
+		dev_warn(&pdev->dev, "shdwc unknown wakeup mode\n");
+		return;
+	}
+
+	if (!of_property_read_u32(np, "atmel,wakeup-counter", &tmp)) {
+		if (tmp > AT91_SHDW_CPTWK0_MAX) {
+			dev_warn(&pdev->dev,
+				 "shdwc wakeup counter 0x%x > 0x%x reduce it to 0x%x\n",
+				 tmp, AT91_SHDW_CPTWK0_MAX, AT91_SHDW_CPTWK0_MAX);
+			tmp = AT91_SHDW_CPTWK0_MAX;
+		}
+		mode |= AT91_SHDW_CPTWK0_(tmp);
+	}
+
+	if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
+			mode |= AT91_SHDW_RTCWKEN;
+
+	if (of_property_read_bool(np, "atmel,wakeup-rtt-timer"))
+			mode |= AT91_SHDW_RTTWKEN;
+
+	writel(wakeup_mode | mode, at91_shdwc_base + AT91_SHDW_MR);
+}
+
+static int __init at91_poweroff_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	struct device_node *np;
+	u32 ddr_type;
+	int ret;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(at91_shdwc_base))
+		return PTR_ERR(at91_shdwc_base);
+
+	sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(sclk))
+		return PTR_ERR(sclk);
+
+	ret = clk_prepare_enable(sclk);
+	if (ret) {
+		dev_err(&pdev->dev, "Could not enable slow clock\n");
+		return ret;
+	}
+
+	at91_wakeup_status(pdev);
+
+	if (pdev->dev.of_node)
+		at91_poweroff_dt_set_wakeup_mode(pdev);
+
+	pm_power_off = at91_poweroff;
+
+	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc");
+	if (!np)
+		return 0;
+
+	mpddrc_base = of_iomap(np, 0);
+	of_node_put(np);
+
+	if (!mpddrc_base)
+		return 0;
+
+	ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & AT91_DDRSDRC_MD;
+	if ((ddr_type == AT91_DDRSDRC_MD_LPDDR2) ||
+	    (ddr_type == AT91_DDRSDRC_MD_LPDDR3))
+		pm_power_off = at91_lpddr_poweroff;
+	else
+		iounmap(mpddrc_base);
+
+	return 0;
+}
+
+static int __exit at91_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == at91_poweroff ||
+	    pm_power_off == at91_lpddr_poweroff)
+		pm_power_off = NULL;
+
+	clk_disable_unprepare(sclk);
+
+	return 0;
+}
+
+static const struct of_device_id at91_ramc_of_match[] = {
+	{ .compatible = "atmel,sama5d3-ddramc", },
+	{ /* sentinel */ }
+};
+
+static const struct of_device_id at91_poweroff_of_match[] = {
+	{ .compatible = "atmel,at91sam9260-shdwc", },
+	{ .compatible = "atmel,at91sam9rl-shdwc", },
+	{ .compatible = "atmel,at91sam9x5-shdwc", },
+	{ /*sentinel*/ }
+};
+MODULE_DEVICE_TABLE(of, at91_poweroff_of_match);
+
+static struct platform_driver at91_poweroff_driver = {
+	.remove = __exit_p(at91_poweroff_remove),
+	.driver = {
+		.name = "at91-poweroff",
+		.of_match_table = at91_poweroff_of_match,
+	},
+};
+module_platform_driver_probe(at91_poweroff_driver, at91_poweroff_probe);
+
+MODULE_AUTHOR("Atmel Corporation");
+MODULE_DESCRIPTION("Shutdown driver for Atmel SoCs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c
new file mode 100644
index 000000000..f44a9ffcc
--- /dev/null
+++ b/drivers/power/reset/at91-reset.c
@@ -0,0 +1,262 @@
+/*
+ * Atmel AT91 SAM9 & SAMA5 SoCs reset code
+ *
+ * Copyright (C) 2007 Atmel Corporation.
+ * Copyright (C) BitBox Ltd 2010
+ * Copyright (C) 2011 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcosoft.com>
+ * Copyright (C) 2014 Free Electrons
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+#include <soc/at91/at91sam9_ddrsdr.h>
+#include <soc/at91/at91sam9_sdramc.h>
+
+#define AT91_RSTC_CR	0x00		/* Reset Controller Control Register */
+#define AT91_RSTC_PROCRST	BIT(0)		/* Processor Reset */
+#define AT91_RSTC_PERRST	BIT(2)		/* Peripheral Reset */
+#define AT91_RSTC_EXTRST	BIT(3)		/* External Reset */
+#define AT91_RSTC_KEY		(0xa5 << 24)	/* KEY Password */
+
+#define AT91_RSTC_SR	0x04		/* Reset Controller Status Register */
+#define AT91_RSTC_URSTS		BIT(0)		/* User Reset Status */
+#define AT91_RSTC_RSTTYP	GENMASK(10, 8)	/* Reset Type */
+#define AT91_RSTC_NRSTL		BIT(16)		/* NRST Pin Level */
+#define AT91_RSTC_SRCMP		BIT(17)		/* Software Reset Command in Progress */
+
+#define AT91_RSTC_MR	0x08		/* Reset Controller Mode Register */
+#define AT91_RSTC_URSTEN	BIT(0)		/* User Reset Enable */
+#define AT91_RSTC_URSTIEN	BIT(4)		/* User Reset Interrupt Enable */
+#define AT91_RSTC_ERSTL		GENMASK(11, 8)	/* External Reset Length */
+
+enum reset_type {
+	RESET_TYPE_GENERAL	= 0,
+	RESET_TYPE_WAKEUP	= 1,
+	RESET_TYPE_WATCHDOG	= 2,
+	RESET_TYPE_SOFTWARE	= 3,
+	RESET_TYPE_USER		= 4,
+};
+
+static void __iomem *at91_ramc_base[2], *at91_rstc_base;
+static struct clk *sclk;
+
+/*
+* unless the SDRAM is cleanly shutdown before we hit the
+* reset register it can be left driving the data bus and
+* killing the chance of a subsequent boot from NAND
+*/
+static int at91sam9260_restart(struct notifier_block *this, unsigned long mode,
+			       void *cmd)
+{
+	asm volatile(
+		/* Align to cache lines */
+		".balign 32\n\t"
+
+		/* Disable SDRAM accesses */
+		"str	%2, [%0, #" __stringify(AT91_SDRAMC_TR) "]\n\t"
+
+		/* Power down SDRAM */
+		"str	%3, [%0, #" __stringify(AT91_SDRAMC_LPR) "]\n\t"
+
+		/* Reset CPU */
+		"str	%4, [%1, #" __stringify(AT91_RSTC_CR) "]\n\t"
+
+		"b	.\n\t"
+		:
+		: "r" (at91_ramc_base[0]),
+		  "r" (at91_rstc_base),
+		  "r" (1),
+		  "r" cpu_to_le32(AT91_SDRAMC_LPCB_POWER_DOWN),
+		  "r" cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST));
+
+	return NOTIFY_DONE;
+}
+
+static int at91sam9g45_restart(struct notifier_block *this, unsigned long mode,
+			       void *cmd)
+{
+	asm volatile(
+		/*
+		 * Test wether we have a second RAM controller to care
+		 * about.
+		 *
+		 * First, test that we can dereference the virtual address.
+		 */
+		"cmp	%1, #0\n\t"
+		"beq	1f\n\t"
+
+		/* Then, test that the RAM controller is enabled */
+		"ldr	r0, [%1]\n\t"
+		"cmp	r0, #0\n\t"
+
+		/* Align to cache lines */
+		".balign 32\n\t"
+
+		/* Disable SDRAM0 accesses */
+		"1:	str	%3, [%0, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+		/* Power down SDRAM0 */
+		"	str	%4, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		/* Disable SDRAM1 accesses */
+		"	strne	%3, [%1, #" __stringify(AT91_DDRSDRC_RTR) "]\n\t"
+		/* Power down SDRAM1 */
+		"	strne	%4, [%1, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		/* Reset CPU */
+		"	str	%5, [%2, #" __stringify(AT91_RSTC_CR) "]\n\t"
+
+		"	b	.\n\t"
+		:
+		: "r" (at91_ramc_base[0]),
+		  "r" (at91_ramc_base[1]),
+		  "r" (at91_rstc_base),
+		  "r" (1),
+		  "r" cpu_to_le32(AT91_DDRSDRC_LPCB_POWER_DOWN),
+		  "r" cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST)
+		: "r0");
+
+	return NOTIFY_DONE;
+}
+
+static int sama5d3_restart(struct notifier_block *this, unsigned long mode,
+			   void *cmd)
+{
+	writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PERRST | AT91_RSTC_PROCRST),
+	       at91_rstc_base);
+
+	return NOTIFY_DONE;
+}
+
+static int samx7_restart(struct notifier_block *this, unsigned long mode,
+			 void *cmd)
+{
+	writel(cpu_to_le32(AT91_RSTC_KEY | AT91_RSTC_PROCRST),
+	       at91_rstc_base);
+
+	return NOTIFY_DONE;
+}
+
+static void __init at91_reset_status(struct platform_device *pdev)
+{
+	const char *reason;
+	u32 reg = readl(at91_rstc_base + AT91_RSTC_SR);
+
+	switch ((reg & AT91_RSTC_RSTTYP) >> 8) {
+	case RESET_TYPE_GENERAL:
+		reason = "general reset";
+		break;
+	case RESET_TYPE_WAKEUP:
+		reason = "wakeup";
+		break;
+	case RESET_TYPE_WATCHDOG:
+		reason = "watchdog reset";
+		break;
+	case RESET_TYPE_SOFTWARE:
+		reason = "software reset";
+		break;
+	case RESET_TYPE_USER:
+		reason = "user reset";
+		break;
+	default:
+		reason = "unknown reset";
+		break;
+	}
+
+	dev_info(&pdev->dev, "Starting after %s\n", reason);
+}
+
+static const struct of_device_id at91_ramc_of_match[] = {
+	{ .compatible = "atmel,at91sam9260-sdramc", },
+	{ .compatible = "atmel,at91sam9g45-ddramc", },
+	{ /* sentinel */ }
+};
+
+static const struct of_device_id at91_reset_of_match[] = {
+	{ .compatible = "atmel,at91sam9260-rstc", .data = at91sam9260_restart },
+	{ .compatible = "atmel,at91sam9g45-rstc", .data = at91sam9g45_restart },
+	{ .compatible = "atmel,sama5d3-rstc", .data = sama5d3_restart },
+	{ .compatible = "atmel,samx7-rstc", .data = samx7_restart },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, at91_reset_of_match);
+
+static struct notifier_block at91_restart_nb = {
+	.priority = 192,
+};
+
+static int __init at91_reset_probe(struct platform_device *pdev)
+{
+	const struct of_device_id *match;
+	struct device_node *np;
+	int ret, idx = 0;
+
+	at91_rstc_base = of_iomap(pdev->dev.of_node, 0);
+	if (!at91_rstc_base) {
+		dev_err(&pdev->dev, "Could not map reset controller address\n");
+		return -ENODEV;
+	}
+
+	if (!of_device_is_compatible(pdev->dev.of_node, "atmel,sama5d3-rstc")) {
+		/* we need to shutdown the ddr controller, so get ramc base */
+		for_each_matching_node(np, at91_ramc_of_match) {
+			at91_ramc_base[idx] = of_iomap(np, 0);
+			if (!at91_ramc_base[idx]) {
+				dev_err(&pdev->dev, "Could not map ram controller address\n");
+				of_node_put(np);
+				return -ENODEV;
+			}
+			idx++;
+		}
+	}
+
+	match = of_match_node(at91_reset_of_match, pdev->dev.of_node);
+	at91_restart_nb.notifier_call = match->data;
+
+	sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(sclk))
+		return PTR_ERR(sclk);
+
+	ret = clk_prepare_enable(sclk);
+	if (ret) {
+		dev_err(&pdev->dev, "Could not enable slow clock\n");
+		return ret;
+	}
+
+	ret = register_restart_handler(&at91_restart_nb);
+	if (ret) {
+		clk_disable_unprepare(sclk);
+		return ret;
+	}
+
+	at91_reset_status(pdev);
+
+	return 0;
+}
+
+static int __exit at91_reset_remove(struct platform_device *pdev)
+{
+	unregister_restart_handler(&at91_restart_nb);
+	clk_disable_unprepare(sclk);
+
+	return 0;
+}
+
+static struct platform_driver at91_reset_driver = {
+	.remove = __exit_p(at91_reset_remove),
+	.driver = {
+		.name = "at91-reset",
+		.of_match_table = at91_reset_of_match,
+	},
+};
+module_platform_driver_probe(at91_reset_driver, at91_reset_probe);
+
+MODULE_AUTHOR("Atmel Corporation");
+MODULE_DESCRIPTION("Reset driver for Atmel SoCs");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c
new file mode 100644
index 000000000..7cf59e764
--- /dev/null
+++ b/drivers/power/reset/at91-sama5d2_shdwc.c
@@ -0,0 +1,332 @@
+/*
+ * Atmel SAMA5D2-Compatible Shutdown Controller (SHDWC) driver.
+ * Found on some SoCs as the sama5d2 (obviously).
+ *
+ * Copyright (C) 2015 Atmel Corporation,
+ *                    Nicolas Ferre <nicolas.ferre@atmel.com>
+ *
+ * Evolved from driver at91-poweroff.c.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ *
+ * TODO:
+ * - addition to status of other wake-up inputs [1 - 15]
+ * - Analog Comparator wake-up alarm
+ * - Serial RX wake-up alarm
+ * - low power debouncer
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+
+#include <soc/at91/at91sam9_ddrsdr.h>
+
+#define SLOW_CLOCK_FREQ	32768
+
+#define AT91_SHDW_CR	0x00		/* Shut Down Control Register */
+#define AT91_SHDW_SHDW		BIT(0)			/* Shut Down command */
+#define AT91_SHDW_KEY		(0xa5UL << 24)		/* KEY Password */
+
+#define AT91_SHDW_MR	0x04		/* Shut Down Mode Register */
+#define AT91_SHDW_WKUPDBC_SHIFT	24
+#define AT91_SHDW_WKUPDBC_MASK	GENMASK(26, 24)
+#define AT91_SHDW_WKUPDBC(x)	(((x) << AT91_SHDW_WKUPDBC_SHIFT) \
+						& AT91_SHDW_WKUPDBC_MASK)
+
+#define AT91_SHDW_SR	0x08		/* Shut Down Status Register */
+#define AT91_SHDW_WKUPIS_SHIFT	16
+#define AT91_SHDW_WKUPIS_MASK	GENMASK(31, 16)
+#define AT91_SHDW_WKUPIS(x)	((1 << (x)) << AT91_SHDW_WKUPIS_SHIFT \
+						& AT91_SHDW_WKUPIS_MASK)
+
+#define AT91_SHDW_WUIR	0x0c		/* Shutdown Wake-up Inputs Register */
+#define AT91_SHDW_WKUPEN_MASK	GENMASK(15, 0)
+#define AT91_SHDW_WKUPEN(x)	((1 << (x)) & AT91_SHDW_WKUPEN_MASK)
+#define AT91_SHDW_WKUPT_SHIFT	16
+#define AT91_SHDW_WKUPT_MASK	GENMASK(31, 16)
+#define AT91_SHDW_WKUPT(x)	((1 << (x)) << AT91_SHDW_WKUPT_SHIFT \
+						& AT91_SHDW_WKUPT_MASK)
+
+#define SHDW_WK_PIN(reg, cfg)	((reg) & AT91_SHDW_WKUPIS((cfg)->wkup_pin_input))
+#define SHDW_RTCWK(reg, cfg)	(((reg) >> ((cfg)->sr_rtcwk_shift)) & 0x1)
+#define SHDW_RTCWKEN(cfg)	(1 << ((cfg)->mr_rtcwk_shift))
+
+#define DBC_PERIOD_US(x)	DIV_ROUND_UP_ULL((1000000 * (x)), \
+							SLOW_CLOCK_FREQ)
+
+struct shdwc_config {
+	u8 wkup_pin_input;
+	u8 mr_rtcwk_shift;
+	u8 sr_rtcwk_shift;
+};
+
+struct shdwc {
+	const struct shdwc_config *cfg;
+	void __iomem *at91_shdwc_base;
+};
+
+/*
+ * Hold configuration here, cannot be more than one instance of the driver
+ * since pm_power_off itself is global.
+ */
+static struct shdwc *at91_shdwc;
+static struct clk *sclk;
+static void __iomem *mpddrc_base;
+
+static const unsigned long long sdwc_dbc_period[] = {
+	0, 3, 32, 512, 4096, 32768,
+};
+
+static void __init at91_wakeup_status(struct platform_device *pdev)
+{
+	struct shdwc *shdw = platform_get_drvdata(pdev);
+	u32 reg;
+	char *reason = "unknown";
+
+	reg = readl(shdw->at91_shdwc_base + AT91_SHDW_SR);
+
+	dev_dbg(&pdev->dev, "%s: status = %#x\n", __func__, reg);
+
+	/* Simple power-on, just bail out */
+	if (!reg)
+		return;
+
+	if (SHDW_WK_PIN(reg, shdw->cfg))
+		reason = "WKUP pin";
+	else if (SHDW_RTCWK(reg, shdw->cfg))
+		reason = "RTC";
+
+	pr_info("AT91: Wake-Up source: %s\n", reason);
+}
+
+static void at91_poweroff(void)
+{
+	writel(AT91_SHDW_KEY | AT91_SHDW_SHDW,
+	       at91_shdwc->at91_shdwc_base + AT91_SHDW_CR);
+}
+
+static void at91_lpddr_poweroff(void)
+{
+	asm volatile(
+		/* Align to cache lines */
+		".balign 32\n\t"
+
+		/* Ensure AT91_SHDW_CR is in the TLB by reading it */
+		"	ldr	r6, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
+
+		/* Power down SDRAM0 */
+		"	str	%1, [%0, #" __stringify(AT91_DDRSDRC_LPR) "]\n\t"
+		/* Shutdown CPU */
+		"	str	%3, [%2, #" __stringify(AT91_SHDW_CR) "]\n\t"
+
+		"	b	.\n\t"
+		:
+		: "r" (mpddrc_base),
+		  "r" cpu_to_le32(AT91_DDRSDRC_LPDDR2_PWOFF),
+		  "r" (at91_shdwc->at91_shdwc_base),
+		  "r" cpu_to_le32(AT91_SHDW_KEY | AT91_SHDW_SHDW)
+		: "r6");
+}
+
+static u32 at91_shdwc_debouncer_value(struct platform_device *pdev,
+				      u32 in_period_us)
+{
+	int i;
+	int max_idx = ARRAY_SIZE(sdwc_dbc_period) - 1;
+	unsigned long long period_us;
+	unsigned long long max_period_us = DBC_PERIOD_US(sdwc_dbc_period[max_idx]);
+
+	if (in_period_us > max_period_us) {
+		dev_warn(&pdev->dev,
+			 "debouncer period %u too big, reduced to %llu us\n",
+			 in_period_us, max_period_us);
+		return max_idx;
+	}
+
+	for (i = max_idx - 1; i > 0; i--) {
+		period_us = DBC_PERIOD_US(sdwc_dbc_period[i]);
+		dev_dbg(&pdev->dev, "%s: ref[%d] = %llu\n",
+						__func__, i, period_us);
+		if (in_period_us > period_us)
+			break;
+	}
+
+	return i + 1;
+}
+
+static u32 at91_shdwc_get_wakeup_input(struct platform_device *pdev,
+				       struct device_node *np)
+{
+	struct device_node *cnp;
+	u32 wk_input_mask;
+	u32 wuir = 0;
+	u32 wk_input;
+
+	for_each_child_of_node(np, cnp) {
+		if (of_property_read_u32(cnp, "reg", &wk_input)) {
+			dev_warn(&pdev->dev, "reg property is missing for %pOF\n",
+				 cnp);
+			continue;
+		}
+
+		wk_input_mask = 1 << wk_input;
+		if (!(wk_input_mask & AT91_SHDW_WKUPEN_MASK)) {
+			dev_warn(&pdev->dev,
+				 "wake-up input %d out of bounds ignore\n",
+				 wk_input);
+			continue;
+		}
+		wuir |= wk_input_mask;
+
+		if (of_property_read_bool(cnp, "atmel,wakeup-active-high"))
+			wuir |= AT91_SHDW_WKUPT(wk_input);
+
+		dev_dbg(&pdev->dev, "%s: (child %d) wuir = %#x\n",
+						__func__, wk_input, wuir);
+	}
+
+	return wuir;
+}
+
+static void at91_shdwc_dt_configure(struct platform_device *pdev)
+{
+	struct shdwc *shdw = platform_get_drvdata(pdev);
+	struct device_node *np = pdev->dev.of_node;
+	u32 mode = 0, tmp, input;
+
+	if (!np) {
+		dev_err(&pdev->dev, "device node not found\n");
+		return;
+	}
+
+	if (!of_property_read_u32(np, "debounce-delay-us", &tmp))
+		mode |= AT91_SHDW_WKUPDBC(at91_shdwc_debouncer_value(pdev, tmp));
+
+	if (of_property_read_bool(np, "atmel,wakeup-rtc-timer"))
+		mode |= SHDW_RTCWKEN(shdw->cfg);
+
+	dev_dbg(&pdev->dev, "%s: mode = %#x\n", __func__, mode);
+	writel(mode, shdw->at91_shdwc_base + AT91_SHDW_MR);
+
+	input = at91_shdwc_get_wakeup_input(pdev, np);
+	writel(input, shdw->at91_shdwc_base + AT91_SHDW_WUIR);
+}
+
+static const struct shdwc_config sama5d2_shdwc_config = {
+	.wkup_pin_input = 0,
+	.mr_rtcwk_shift = 17,
+	.sr_rtcwk_shift = 5,
+};
+
+static const struct of_device_id at91_shdwc_of_match[] = {
+	{
+		.compatible = "atmel,sama5d2-shdwc",
+		.data = &sama5d2_shdwc_config,
+	}, {
+		/*sentinel*/
+	}
+};
+MODULE_DEVICE_TABLE(of, at91_shdwc_of_match);
+
+static int __init at91_shdwc_probe(struct platform_device *pdev)
+{
+	struct resource *res;
+	const struct of_device_id *match;
+	struct device_node *np;
+	u32 ddr_type;
+	int ret;
+
+	if (!pdev->dev.of_node)
+		return -ENODEV;
+
+	if (at91_shdwc)
+		return -EBUSY;
+
+	at91_shdwc = devm_kzalloc(&pdev->dev, sizeof(*at91_shdwc), GFP_KERNEL);
+	if (!at91_shdwc)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, at91_shdwc);
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	at91_shdwc->at91_shdwc_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(at91_shdwc->at91_shdwc_base)) {
+		dev_err(&pdev->dev, "Could not map reset controller address\n");
+		return PTR_ERR(at91_shdwc->at91_shdwc_base);
+	}
+
+	match = of_match_node(at91_shdwc_of_match, pdev->dev.of_node);
+	at91_shdwc->cfg = match->data;
+
+	sclk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(sclk))
+		return PTR_ERR(sclk);
+
+	ret = clk_prepare_enable(sclk);
+	if (ret) {
+		dev_err(&pdev->dev, "Could not enable slow clock\n");
+		return ret;
+	}
+
+	at91_wakeup_status(pdev);
+
+	at91_shdwc_dt_configure(pdev);
+
+	pm_power_off = at91_poweroff;
+
+	np = of_find_compatible_node(NULL, NULL, "atmel,sama5d3-ddramc");
+	if (!np)
+		return 0;
+
+	mpddrc_base = of_iomap(np, 0);
+	of_node_put(np);
+
+	if (!mpddrc_base)
+		return 0;
+
+	ddr_type = readl(mpddrc_base + AT91_DDRSDRC_MDR) & AT91_DDRSDRC_MD;
+	if ((ddr_type == AT91_DDRSDRC_MD_LPDDR2) ||
+	    (ddr_type == AT91_DDRSDRC_MD_LPDDR3))
+		pm_power_off = at91_lpddr_poweroff;
+	else
+		iounmap(mpddrc_base);
+
+	return 0;
+}
+
+static int __exit at91_shdwc_remove(struct platform_device *pdev)
+{
+	struct shdwc *shdw = platform_get_drvdata(pdev);
+
+	if (pm_power_off == at91_poweroff ||
+	    pm_power_off == at91_lpddr_poweroff)
+		pm_power_off = NULL;
+
+	/* Reset values to disable wake-up features  */
+	writel(0, shdw->at91_shdwc_base + AT91_SHDW_MR);
+	writel(0, shdw->at91_shdwc_base + AT91_SHDW_WUIR);
+
+	clk_disable_unprepare(sclk);
+
+	return 0;
+}
+
+static struct platform_driver at91_shdwc_driver = {
+	.remove = __exit_p(at91_shdwc_remove),
+	.driver = {
+		.name = "at91-shdwc",
+		.of_match_table = at91_shdwc_of_match,
+	},
+};
+module_platform_driver_probe(at91_shdwc_driver, at91_shdwc_probe);
+
+MODULE_AUTHOR("Nicolas Ferre <nicolas.ferre@atmel.com>");
+MODULE_DESCRIPTION("Atmel shutdown controller driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/axxia-reset.c b/drivers/power/reset/axxia-reset.c
new file mode 100644
index 000000000..4e4cd1c8f
--- /dev/null
+++ b/drivers/power/reset/axxia-reset.c
@@ -0,0 +1,97 @@
+/*
+ * Reset driver for Axxia devices
+ *
+ * Copyright (C) 2014 LSI
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#include <linux/init.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+#define SC_CRIT_WRITE_KEY	0x1000
+#define SC_LATCH_ON_RESET	0x1004
+#define SC_RESET_CONTROL	0x1008
+#define   RSTCTL_RST_ZERO	(1<<3)
+#define   RSTCTL_RST_FAB	(1<<2)
+#define   RSTCTL_RST_CHIP	(1<<1)
+#define   RSTCTL_RST_SYS	(1<<0)
+#define SC_EFUSE_INT_STATUS	0x180c
+#define   EFUSE_READ_DONE	(1<<31)
+
+static struct regmap *syscon;
+
+static int axxia_restart_handler(struct notifier_block *this,
+				 unsigned long mode, void *cmd)
+{
+	/* Access Key (0xab) */
+	regmap_write(syscon, SC_CRIT_WRITE_KEY, 0xab);
+	/* Select internal boot from 0xffff0000 */
+	regmap_write(syscon, SC_LATCH_ON_RESET, 0x00000040);
+	/* Assert ResetReadDone (to avoid hanging in boot ROM) */
+	regmap_write(syscon, SC_EFUSE_INT_STATUS, EFUSE_READ_DONE);
+	/* Assert chip reset */
+	regmap_update_bits(syscon, SC_RESET_CONTROL,
+			   RSTCTL_RST_CHIP, RSTCTL_RST_CHIP);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block axxia_restart_nb = {
+	.notifier_call = axxia_restart_handler,
+	.priority = 128,
+};
+
+static int axxia_reset_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	int err;
+
+	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(syscon)) {
+		pr_err("%s: syscon lookup failed\n", dev->of_node->name);
+		return PTR_ERR(syscon);
+	}
+
+	err = register_restart_handler(&axxia_restart_nb);
+	if (err)
+		dev_err(dev, "cannot register restart handler (err=%d)\n", err);
+
+	return err;
+}
+
+static const struct of_device_id of_axxia_reset_match[] = {
+	{ .compatible = "lsi,axm55xx-reset", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_axxia_reset_match);
+
+static struct platform_driver axxia_reset_driver = {
+	.probe = axxia_reset_probe,
+	.driver = {
+		.name = "axxia-reset",
+		.of_match_table = of_match_ptr(of_axxia_reset_match),
+	},
+};
+
+static int __init axxia_reset_init(void)
+{
+	return platform_driver_register(&axxia_reset_driver);
+}
+device_initcall(axxia_reset_init);
diff --git a/drivers/power/reset/brcm-kona-reset.c b/drivers/power/reset/brcm-kona-reset.c
new file mode 100644
index 000000000..8eaa959d8
--- /dev/null
+++ b/drivers/power/reset/brcm-kona-reset.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2016 Broadcom
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/reboot.h>
+
+#define RSTMGR_REG_WR_ACCESS_OFFSET	0
+#define RSTMGR_REG_CHIP_SOFT_RST_OFFSET	4
+
+#define RSTMGR_WR_PASSWORD		0xa5a5
+#define RSTMGR_WR_PASSWORD_SHIFT	8
+#define RSTMGR_WR_ACCESS_ENABLE		1
+
+static void __iomem *kona_reset_base;
+
+static int kona_reset_handler(struct notifier_block *this,
+				unsigned long mode, void *cmd)
+{
+	/*
+	 * A soft reset is triggered by writing a 0 to bit 0 of the soft reset
+	 * register. To write to that register we must first write the password
+	 * and the enable bit in the write access enable register.
+	 */
+	writel((RSTMGR_WR_PASSWORD << RSTMGR_WR_PASSWORD_SHIFT) |
+		RSTMGR_WR_ACCESS_ENABLE,
+		kona_reset_base + RSTMGR_REG_WR_ACCESS_OFFSET);
+	writel(0, kona_reset_base + RSTMGR_REG_CHIP_SOFT_RST_OFFSET);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block kona_reset_nb = {
+	.notifier_call = kona_reset_handler,
+	.priority = 128,
+};
+
+static int kona_reset_probe(struct platform_device *pdev)
+{
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	kona_reset_base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(kona_reset_base))
+		return PTR_ERR(kona_reset_base);
+
+	return register_restart_handler(&kona_reset_nb);
+}
+
+static const struct of_device_id of_match[] = {
+	{ .compatible = "brcm,bcm21664-resetmgr" },
+	{},
+};
+
+static struct platform_driver bcm_kona_reset_driver = {
+	.probe = kona_reset_probe,
+	.driver = {
+		.name = "brcm-kona-reset",
+		.of_match_table = of_match,
+	},
+};
+
+builtin_platform_driver(bcm_kona_reset_driver);
diff --git a/drivers/power/reset/brcmstb-reboot.c b/drivers/power/reset/brcmstb-reboot.c
new file mode 100644
index 000000000..884b53c48
--- /dev/null
+++ b/drivers/power/reset/brcmstb-reboot.c
@@ -0,0 +1,156 @@
+/*
+ * Copyright (C) 2013 Broadcom Corporation
+ *
+ * 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 version 2.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bitops.h>
+#include <linux/device.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/jiffies.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/smp.h>
+#include <linux/mfd/syscon.h>
+
+#define RESET_SOURCE_ENABLE_REG 1
+#define SW_MASTER_RESET_REG 2
+
+static struct regmap *regmap;
+static u32 rst_src_en;
+static u32 sw_mstr_rst;
+
+struct reset_reg_mask {
+	u32 rst_src_en_mask;
+	u32 sw_mstr_rst_mask;
+};
+
+static const struct reset_reg_mask *reset_masks;
+
+static int brcmstb_restart_handler(struct notifier_block *this,
+				   unsigned long mode, void *cmd)
+{
+	int rc;
+	u32 tmp;
+
+	rc = regmap_write(regmap, rst_src_en, reset_masks->rst_src_en_mask);
+	if (rc) {
+		pr_err("failed to write rst_src_en (%d)\n", rc);
+		return NOTIFY_DONE;
+	}
+
+	rc = regmap_read(regmap, rst_src_en, &tmp);
+	if (rc) {
+		pr_err("failed to read rst_src_en (%d)\n", rc);
+		return NOTIFY_DONE;
+	}
+
+	rc = regmap_write(regmap, sw_mstr_rst, reset_masks->sw_mstr_rst_mask);
+	if (rc) {
+		pr_err("failed to write sw_mstr_rst (%d)\n", rc);
+		return NOTIFY_DONE;
+	}
+
+	rc = regmap_read(regmap, sw_mstr_rst, &tmp);
+	if (rc) {
+		pr_err("failed to read sw_mstr_rst (%d)\n", rc);
+		return NOTIFY_DONE;
+	}
+
+	while (1)
+		;
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block brcmstb_restart_nb = {
+	.notifier_call = brcmstb_restart_handler,
+	.priority = 128,
+};
+
+static const struct reset_reg_mask reset_bits_40nm = {
+	.rst_src_en_mask = BIT(0),
+	.sw_mstr_rst_mask = BIT(0),
+};
+
+static const struct reset_reg_mask reset_bits_65nm = {
+	.rst_src_en_mask = BIT(3),
+	.sw_mstr_rst_mask = BIT(31),
+};
+
+static const struct of_device_id of_match[] = {
+	{ .compatible = "brcm,brcmstb-reboot", .data = &reset_bits_40nm },
+	{ .compatible = "brcm,bcm7038-reboot", .data = &reset_bits_65nm },
+	{},
+};
+
+static int brcmstb_reboot_probe(struct platform_device *pdev)
+{
+	int rc;
+	struct device_node *np = pdev->dev.of_node;
+	const struct of_device_id *of_id;
+
+	of_id = of_match_node(of_match, np);
+	if (!of_id) {
+		pr_err("failed to look up compatible string\n");
+		return -EINVAL;
+	}
+	reset_masks = of_id->data;
+
+	regmap = syscon_regmap_lookup_by_phandle(np, "syscon");
+	if (IS_ERR(regmap)) {
+		pr_err("failed to get syscon phandle\n");
+		return -EINVAL;
+	}
+
+	rc = of_property_read_u32_index(np, "syscon", RESET_SOURCE_ENABLE_REG,
+					&rst_src_en);
+	if (rc) {
+		pr_err("can't get rst_src_en offset (%d)\n", rc);
+		return -EINVAL;
+	}
+
+	rc = of_property_read_u32_index(np, "syscon", SW_MASTER_RESET_REG,
+					&sw_mstr_rst);
+	if (rc) {
+		pr_err("can't get sw_mstr_rst offset (%d)\n", rc);
+		return -EINVAL;
+	}
+
+	rc = register_restart_handler(&brcmstb_restart_nb);
+	if (rc)
+		dev_err(&pdev->dev,
+			"cannot register restart handler (err=%d)\n", rc);
+
+	return rc;
+}
+
+static struct platform_driver brcmstb_reboot_driver = {
+	.probe = brcmstb_reboot_probe,
+	.driver = {
+		.name = "brcmstb-reboot",
+		.of_match_table = of_match,
+	},
+};
+
+static int __init brcmstb_reboot_init(void)
+{
+	return platform_driver_probe(&brcmstb_reboot_driver,
+					brcmstb_reboot_probe);
+}
+subsys_initcall(brcmstb_reboot_init);
diff --git a/drivers/power/reset/gemini-poweroff.c b/drivers/power/reset/gemini-poweroff.c
new file mode 100644
index 000000000..b7f7a8225
--- /dev/null
+++ b/drivers/power/reset/gemini-poweroff.c
@@ -0,0 +1,175 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Gemini power management controller
+ * Copyright (C) 2017 Linus Walleij <linus.walleij@linaro.org>
+ *
+ * Inspired by code from the SL3516 board support by Jason Lee
+ * Inspired by code from Janos Laube <janos.dev@gmail.com>
+ */
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/reboot.h>
+
+#define GEMINI_PWC_ID		0x00010500
+#define	GEMINI_PWC_IDREG	0x00
+#define	GEMINI_PWC_CTRLREG	0x04
+#define	GEMINI_PWC_STATREG	0x08
+
+#define GEMINI_CTRL_SHUTDOWN	BIT(0)
+#define GEMINI_CTRL_ENABLE	BIT(1)
+#define GEMINI_CTRL_IRQ_CLR	BIT(2)
+
+#define GEMINI_STAT_CIR		BIT(4)
+#define	GEMINI_STAT_RTC		BIT(5)
+#define	GEMINI_STAT_POWERBUTTON	BIT(6)
+
+struct gemini_powercon {
+        struct device           *dev;
+        void __iomem            *base;
+};
+
+static irqreturn_t gemini_powerbutton_interrupt(int irq, void *data)
+{
+	struct gemini_powercon *gpw = data;
+	u32 val;
+
+	/* ACK the IRQ */
+	val = readl(gpw->base + GEMINI_PWC_CTRLREG);
+	val |= GEMINI_CTRL_IRQ_CLR;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	val = readl(gpw->base + GEMINI_PWC_STATREG);
+	val &= 0x70U;
+	switch (val) {
+	case GEMINI_STAT_CIR:
+		/*
+		 * We do not yet have a driver for the infrared
+		 * controller so it can cause spurious poweroff
+		 * events. Ignore those for now.
+		 */
+		dev_info(gpw->dev, "infrared poweroff - ignored\n");
+		break;
+	case GEMINI_STAT_RTC:
+		dev_info(gpw->dev, "RTC poweroff\n");
+		orderly_poweroff(true);
+		break;
+	case GEMINI_STAT_POWERBUTTON:
+		dev_info(gpw->dev, "poweroff button pressed\n");
+		orderly_poweroff(true);
+		break;
+	default:
+		dev_info(gpw->dev, "other power management IRQ\n");
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
+/* This callback needs this static local as it has void as argument */
+static struct gemini_powercon *gpw_poweroff;
+
+static void gemini_poweroff(void)
+{
+	struct gemini_powercon *gpw = gpw_poweroff;
+	u32 val;
+
+	dev_crit(gpw->dev, "Gemini power off\n");
+	val = readl(gpw->base + GEMINI_PWC_CTRLREG);
+	val |= GEMINI_CTRL_ENABLE | GEMINI_CTRL_IRQ_CLR;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	val &= ~GEMINI_CTRL_ENABLE;
+	val |= GEMINI_CTRL_SHUTDOWN;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+}
+
+static int gemini_poweroff_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct gemini_powercon *gpw;
+	u32 val;
+	int irq;
+	int ret;
+
+	gpw = devm_kzalloc(dev, sizeof(*gpw), GFP_KERNEL);
+	if (!gpw)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	gpw->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(gpw->base))
+		return PTR_ERR(gpw->base);
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	gpw->dev = dev;
+
+	val = readl(gpw->base + GEMINI_PWC_IDREG);
+	val &= 0xFFFFFF00U;
+	if (val != GEMINI_PWC_ID) {
+		dev_err(dev, "wrong power controller ID: %08x\n",
+			val);
+		return -ENODEV;
+	}
+
+	/*
+	 * Enable the power controller. This is crucial on Gemini
+	 * systems: if this is not done, pressing the power button
+	 * will result in unconditional poweroff without any warning.
+	 * This makes the kernel handle the poweroff.
+	 */
+	val = readl(gpw->base + GEMINI_PWC_CTRLREG);
+	val |= GEMINI_CTRL_ENABLE;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	/* Clear the IRQ */
+	val = readl(gpw->base + GEMINI_PWC_CTRLREG);
+	val |= GEMINI_CTRL_IRQ_CLR;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	/* Wait for this to clear */
+	val = readl(gpw->base + GEMINI_PWC_STATREG);
+	while (val & 0x70U)
+		val = readl(gpw->base + GEMINI_PWC_STATREG);
+
+	/* Clear the IRQ again */
+	val = readl(gpw->base + GEMINI_PWC_CTRLREG);
+	val |= GEMINI_CTRL_IRQ_CLR;
+	writel(val, gpw->base + GEMINI_PWC_CTRLREG);
+
+	ret = devm_request_irq(dev, irq, gemini_powerbutton_interrupt, 0,
+			       "poweroff", gpw);
+	if (ret)
+		return ret;
+
+	pm_power_off = gemini_poweroff;
+	gpw_poweroff = gpw;
+
+	dev_info(dev, "Gemini poweroff driver registered\n");
+
+	return 0;
+}
+
+static const struct of_device_id gemini_poweroff_of_match[] = {
+	{
+		.compatible = "cortina,gemini-power-controller",
+	},
+	{}
+};
+
+static struct platform_driver gemini_poweroff_driver = {
+	.probe = gemini_poweroff_probe,
+	.driver = {
+		.name = "gemini-poweroff",
+		.of_match_table = gemini_poweroff_of_match,
+	},
+};
+builtin_platform_driver(gemini_poweroff_driver);
diff --git a/drivers/power/reset/gpio-poweroff.c b/drivers/power/reset/gpio-poweroff.c
new file mode 100644
index 000000000..5f2fa9c0f
--- /dev/null
+++ b/drivers/power/reset/gpio-poweroff.c
@@ -0,0 +1,107 @@
+/*
+ * Toggles a GPIO pin to power down a device
+ *
+ * Jamie Lentin <jm@lentin.co.uk>
+ * Andrew Lunn <andrew@lunn.ch>
+ *
+ * Copyright (C) 2012 Jamie Lentin
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
+#include <linux/module.h>
+
+#define DEFAULT_TIMEOUT_MS 3000
+/*
+ * Hold configuration here, cannot be more than one instance of the driver
+ * since pm_power_off itself is global.
+ */
+static struct gpio_desc *reset_gpio;
+static u32 timeout = DEFAULT_TIMEOUT_MS;
+
+static void gpio_poweroff_do_poweroff(void)
+{
+	BUG_ON(!reset_gpio);
+
+	/* drive it active, also inactive->active edge */
+	gpiod_direction_output(reset_gpio, 1);
+	mdelay(100);
+	/* drive inactive, also active->inactive edge */
+	gpiod_set_value_cansleep(reset_gpio, 0);
+	mdelay(100);
+
+	/* drive it active, also inactive->active edge */
+	gpiod_set_value_cansleep(reset_gpio, 1);
+
+	/* give it some time */
+	mdelay(timeout);
+
+	WARN_ON(1);
+}
+
+static int gpio_poweroff_probe(struct platform_device *pdev)
+{
+	bool input = false;
+	enum gpiod_flags flags;
+
+	/* If a pm_power_off function has already been added, leave it alone */
+	if (pm_power_off != NULL) {
+		dev_err(&pdev->dev,
+			"%s: pm_power_off function already registered",
+		       __func__);
+		return -EBUSY;
+	}
+
+	input = device_property_read_bool(&pdev->dev, "input");
+	if (input)
+		flags = GPIOD_IN;
+	else
+		flags = GPIOD_OUT_LOW;
+
+	device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);
+
+	reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
+	if (IS_ERR(reset_gpio))
+		return PTR_ERR(reset_gpio);
+
+	pm_power_off = &gpio_poweroff_do_poweroff;
+	return 0;
+}
+
+static int gpio_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == &gpio_poweroff_do_poweroff)
+		pm_power_off = NULL;
+
+	return 0;
+}
+
+static const struct of_device_id of_gpio_poweroff_match[] = {
+	{ .compatible = "gpio-poweroff", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_gpio_poweroff_match);
+
+static struct platform_driver gpio_poweroff_driver = {
+	.probe = gpio_poweroff_probe,
+	.remove = gpio_poweroff_remove,
+	.driver = {
+		.name = "poweroff-gpio",
+		.of_match_table = of_gpio_poweroff_match,
+	},
+};
+
+module_platform_driver(gpio_poweroff_driver);
+
+MODULE_AUTHOR("Jamie Lentin <jm@lentin.co.uk>");
+MODULE_DESCRIPTION("GPIO poweroff driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:poweroff-gpio");
diff --git a/drivers/power/reset/gpio-restart.c b/drivers/power/reset/gpio-restart.c
new file mode 100644
index 000000000..829b45f42
--- /dev/null
+++ b/drivers/power/reset/gpio-restart.c
@@ -0,0 +1,148 @@
+/*
+ * Toggles a GPIO pin to restart a device
+ *
+ * Copyright (C) 2014 Google, Inc.
+ *
+ * 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.
+ *
+ * Based on the gpio-poweroff driver.
+ */
+#include <linux/reboot.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/gpio/consumer.h>
+#include <linux/of_platform.h>
+#include <linux/module.h>
+
+struct gpio_restart {
+	struct gpio_desc *reset_gpio;
+	struct notifier_block restart_handler;
+	u32 active_delay_ms;
+	u32 inactive_delay_ms;
+	u32 wait_delay_ms;
+};
+
+static int gpio_restart_notify(struct notifier_block *this,
+				unsigned long mode, void *cmd)
+{
+	struct gpio_restart *gpio_restart =
+		container_of(this, struct gpio_restart, restart_handler);
+
+	/* drive it active, also inactive->active edge */
+	gpiod_direction_output(gpio_restart->reset_gpio, 1);
+	mdelay(gpio_restart->active_delay_ms);
+
+	/* drive inactive, also active->inactive edge */
+	gpiod_set_value(gpio_restart->reset_gpio, 0);
+	mdelay(gpio_restart->inactive_delay_ms);
+
+	/* drive it active, also inactive->active edge */
+	gpiod_set_value(gpio_restart->reset_gpio, 1);
+
+	/* give it some time */
+	mdelay(gpio_restart->wait_delay_ms);
+
+	WARN_ON(1);
+
+	return NOTIFY_DONE;
+}
+
+static int gpio_restart_probe(struct platform_device *pdev)
+{
+	struct gpio_restart *gpio_restart;
+	bool open_source = false;
+	u32 property;
+	int ret;
+
+	gpio_restart = devm_kzalloc(&pdev->dev, sizeof(*gpio_restart),
+			GFP_KERNEL);
+	if (!gpio_restart)
+		return -ENOMEM;
+
+	open_source = of_property_read_bool(pdev->dev.of_node, "open-source");
+
+	gpio_restart->reset_gpio = devm_gpiod_get(&pdev->dev, NULL,
+			open_source ? GPIOD_IN : GPIOD_OUT_LOW);
+	if (IS_ERR(gpio_restart->reset_gpio)) {
+		dev_err(&pdev->dev, "Could net get reset GPIO\n");
+		return PTR_ERR(gpio_restart->reset_gpio);
+	}
+
+	gpio_restart->restart_handler.notifier_call = gpio_restart_notify;
+	gpio_restart->restart_handler.priority = 129;
+	gpio_restart->active_delay_ms = 100;
+	gpio_restart->inactive_delay_ms = 100;
+	gpio_restart->wait_delay_ms = 3000;
+
+	ret = of_property_read_u32(pdev->dev.of_node, "priority", &property);
+	if (!ret) {
+		if (property > 255)
+			dev_err(&pdev->dev, "Invalid priority property: %u\n",
+					property);
+		else
+			gpio_restart->restart_handler.priority = property;
+	}
+
+	of_property_read_u32(pdev->dev.of_node, "active-delay",
+			&gpio_restart->active_delay_ms);
+	of_property_read_u32(pdev->dev.of_node, "inactive-delay",
+			&gpio_restart->inactive_delay_ms);
+	of_property_read_u32(pdev->dev.of_node, "wait-delay",
+			&gpio_restart->wait_delay_ms);
+
+	platform_set_drvdata(pdev, gpio_restart);
+
+	ret = register_restart_handler(&gpio_restart->restart_handler);
+	if (ret) {
+		dev_err(&pdev->dev, "%s: cannot register restart handler, %d\n",
+				__func__, ret);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static int gpio_restart_remove(struct platform_device *pdev)
+{
+	struct gpio_restart *gpio_restart = platform_get_drvdata(pdev);
+	int ret;
+
+	ret = unregister_restart_handler(&gpio_restart->restart_handler);
+	if (ret) {
+		dev_err(&pdev->dev,
+				"%s: cannot unregister restart handler, %d\n",
+				__func__, ret);
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id of_gpio_restart_match[] = {
+	{ .compatible = "gpio-restart", },
+	{},
+};
+
+static struct platform_driver gpio_restart_driver = {
+	.probe = gpio_restart_probe,
+	.remove = gpio_restart_remove,
+	.driver = {
+		.name = "restart-gpio",
+		.of_match_table = of_gpio_restart_match,
+	},
+};
+
+module_platform_driver(gpio_restart_driver);
+
+MODULE_AUTHOR("David Riley <davidriley@chromium.org>");
+MODULE_DESCRIPTION("GPIO restart driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/reset/hisi-reboot.c b/drivers/power/reset/hisi-reboot.c
new file mode 100644
index 000000000..f69387e12
--- /dev/null
+++ b/drivers/power/reset/hisi-reboot.c
@@ -0,0 +1,82 @@
+/*
+ * Hisilicon SoC reset code
+ *
+ * Copyright (c) 2014 Hisilicon Ltd.
+ * Copyright (c) 2014 Linaro Ltd.
+ *
+ * Author: Haojian Zhuang <haojian.zhuang@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+#include <asm/proc-fns.h>
+
+static void __iomem *base;
+static u32 reboot_offset;
+
+static int hisi_restart_handler(struct notifier_block *this,
+				unsigned long mode, void *cmd)
+{
+	writel_relaxed(0xdeadbeef, base + reboot_offset);
+
+	while (1)
+		cpu_do_idle();
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block hisi_restart_nb = {
+	.notifier_call = hisi_restart_handler,
+	.priority = 128,
+};
+
+static int hisi_reboot_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int err;
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		WARN(1, "failed to map base address");
+		return -ENODEV;
+	}
+
+	if (of_property_read_u32(np, "reboot-offset", &reboot_offset) < 0) {
+		pr_err("failed to find reboot-offset property\n");
+		iounmap(base);
+		return -EINVAL;
+	}
+
+	err = register_restart_handler(&hisi_restart_nb);
+	if (err) {
+		dev_err(&pdev->dev, "cannot register restart handler (err=%d)\n",
+			err);
+		iounmap(base);
+	}
+
+	return err;
+}
+
+static const struct of_device_id hisi_reboot_of_match[] = {
+	{ .compatible = "hisilicon,sysctrl" },
+	{}
+};
+
+static struct platform_driver hisi_reboot_driver = {
+	.probe = hisi_reboot_probe,
+	.driver = {
+		.name = "hisi-reboot",
+		.of_match_table = hisi_reboot_of_match,
+	},
+};
+module_platform_driver(hisi_reboot_driver);
diff --git a/drivers/power/reset/keystone-reset.c b/drivers/power/reset/keystone-reset.c
new file mode 100644
index 000000000..09380857a
--- /dev/null
+++ b/drivers/power/reset/keystone-reset.c
@@ -0,0 +1,175 @@
+/*
+ * TI keystone reboot driver
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated. http://www.ti.com/
+ *
+ * Author: Ivan Khoronzhuk <ivan.khoronzhuk@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.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_platform.h>
+
+#define RSTYPE_RG			0x0
+#define RSCTRL_RG			0x4
+#define RSCFG_RG			0x8
+#define RSISO_RG			0xc
+
+#define RSCTRL_KEY_MASK			0x0000ffff
+#define RSCTRL_RESET_MASK		BIT(16)
+#define RSCTRL_KEY			0x5a69
+
+#define RSMUX_OMODE_MASK		0xe
+#define RSMUX_OMODE_RESET_ON		0xa
+#define RSMUX_OMODE_RESET_OFF		0x0
+#define RSMUX_LOCK_MASK			0x1
+#define RSMUX_LOCK_SET			0x1
+
+#define RSCFG_RSTYPE_SOFT		0x300f
+#define RSCFG_RSTYPE_HARD		0x0
+
+#define WDT_MUX_NUMBER			0x4
+
+static int rspll_offset;
+static struct regmap *pllctrl_regs;
+
+/**
+ * rsctrl_enable_rspll_write - enable access to RSCTRL, RSCFG
+ * To be able to access to RSCTRL, RSCFG registers
+ * we have to write a key before
+ */
+static inline int rsctrl_enable_rspll_write(void)
+{
+	return regmap_update_bits(pllctrl_regs, rspll_offset + RSCTRL_RG,
+				  RSCTRL_KEY_MASK, RSCTRL_KEY);
+}
+
+static int rsctrl_restart_handler(struct notifier_block *this,
+				  unsigned long mode, void *cmd)
+{
+	/* enable write access to RSTCTRL */
+	rsctrl_enable_rspll_write();
+
+	/* reset the SOC */
+	regmap_update_bits(pllctrl_regs, rspll_offset + RSCTRL_RG,
+			   RSCTRL_RESET_MASK, 0);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block rsctrl_restart_nb = {
+	.notifier_call = rsctrl_restart_handler,
+	.priority = 128,
+};
+
+static const struct of_device_id rsctrl_of_match[] = {
+	{.compatible = "ti,keystone-reset", },
+	{},
+};
+
+static int rsctrl_probe(struct platform_device *pdev)
+{
+	int i;
+	int ret;
+	u32 val;
+	unsigned int rg;
+	u32 rsmux_offset;
+	struct regmap *devctrl_regs;
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+
+	if (!np)
+		return -ENODEV;
+
+	/* get regmaps */
+	pllctrl_regs = syscon_regmap_lookup_by_phandle(np, "ti,syscon-pll");
+	if (IS_ERR(pllctrl_regs))
+		return PTR_ERR(pllctrl_regs);
+
+	devctrl_regs = syscon_regmap_lookup_by_phandle(np, "ti,syscon-dev");
+	if (IS_ERR(devctrl_regs))
+		return PTR_ERR(devctrl_regs);
+
+	ret = of_property_read_u32_index(np, "ti,syscon-pll", 1, &rspll_offset);
+	if (ret) {
+		dev_err(dev, "couldn't read the reset pll offset!\n");
+		return -EINVAL;
+	}
+
+	ret = of_property_read_u32_index(np, "ti,syscon-dev", 1, &rsmux_offset);
+	if (ret) {
+		dev_err(dev, "couldn't read the rsmux offset!\n");
+		return -EINVAL;
+	}
+
+	/* set soft/hard reset */
+	val = of_property_read_bool(np, "ti,soft-reset");
+	val = val ? RSCFG_RSTYPE_SOFT : RSCFG_RSTYPE_HARD;
+
+	ret = rsctrl_enable_rspll_write();
+	if (ret)
+		return ret;
+
+	ret = regmap_write(pllctrl_regs, rspll_offset + RSCFG_RG, val);
+	if (ret)
+		return ret;
+
+	/* disable a reset isolation for all module clocks */
+	ret = regmap_write(pllctrl_regs, rspll_offset + RSISO_RG, 0);
+	if (ret)
+		return ret;
+
+	/* enable a reset for watchdogs from wdt-list */
+	for (i = 0; i < WDT_MUX_NUMBER; i++) {
+		ret = of_property_read_u32_index(np, "ti,wdt-list", i, &val);
+		if (ret == -EOVERFLOW && !i) {
+			dev_err(dev, "ti,wdt-list property has to contain at"
+				"least one entry\n");
+			return -EINVAL;
+		} else if (ret) {
+			break;
+		}
+
+		if (val >= WDT_MUX_NUMBER) {
+			dev_err(dev, "ti,wdt-list property can contain "
+				"only numbers < 4\n");
+			return -EINVAL;
+		}
+
+		rg = rsmux_offset + val * 4;
+
+		ret = regmap_update_bits(devctrl_regs, rg, RSMUX_OMODE_MASK,
+					 RSMUX_OMODE_RESET_ON |
+					 RSMUX_LOCK_SET);
+		if (ret)
+			return ret;
+	}
+
+	ret = register_restart_handler(&rsctrl_restart_nb);
+	if (ret)
+		dev_err(dev, "cannot register restart handler (err=%d)\n", ret);
+
+	return ret;
+}
+
+static struct platform_driver rsctrl_driver = {
+	.probe = rsctrl_probe,
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.of_match_table = rsctrl_of_match,
+	},
+};
+module_platform_driver(rsctrl_driver);
+
+MODULE_AUTHOR("Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>");
+MODULE_DESCRIPTION("Texas Instruments keystone reset driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" KBUILD_MODNAME);
diff --git a/drivers/power/reset/ltc2952-poweroff.c b/drivers/power/reset/ltc2952-poweroff.c
new file mode 100644
index 000000000..8a76ef841
--- /dev/null
+++ b/drivers/power/reset/ltc2952-poweroff.c
@@ -0,0 +1,324 @@
+/*
+ * LTC2952 (PowerPath) driver
+ *
+ * Copyright (C) 2014, Xsens Technologies BV <info@xsens.com>
+ * Maintainer: René Moll <linux@r-moll.nl>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * ----------------------------------------
+ * - Description
+ * ----------------------------------------
+ *
+ * This driver is to be used with an external PowerPath Controller (LTC2952).
+ * Its function is to determine when a external shut down is triggered
+ * and react by properly shutting down the system.
+ *
+ * This driver expects a device tree with a ltc2952 entry for pin mapping.
+ *
+ * ----------------------------------------
+ * - GPIO
+ * ----------------------------------------
+ *
+ * The following GPIOs are used:
+ * - trigger (input)
+ *     A level change indicates the shut-down trigger. If it's state reverts
+ *     within the time-out defined by trigger_delay, the shut down is not
+ *     executed. If no pin is assigned to this input, the driver will start the
+ *     watchdog toggle immediately. The chip will only power off the system if
+ *     it is requested to do so through the kill line.
+ *
+ * - watchdog (output)
+ *     Once a shut down is triggered, the driver will toggle this signal,
+ *     with an internal (wde_interval) to stall the hardware shut down.
+ *
+ * - kill (output)
+ *     The last action during shut down is triggering this signalling, such
+ *     that the PowerPath Control will power down the hardware.
+ *
+ * ----------------------------------------
+ * - Interrupts
+ * ----------------------------------------
+ *
+ * The driver requires a non-shared, edge-triggered interrupt on the trigger
+ * GPIO.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/ktime.h>
+#include <linux/slab.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/mod_devicetable.h>
+#include <linux/gpio/consumer.h>
+#include <linux/reboot.h>
+
+struct ltc2952_poweroff {
+	struct hrtimer timer_trigger;
+	struct hrtimer timer_wde;
+
+	ktime_t trigger_delay;
+	ktime_t wde_interval;
+
+	struct device *dev;
+
+	struct gpio_desc *gpio_trigger;
+	struct gpio_desc *gpio_watchdog;
+	struct gpio_desc *gpio_kill;
+
+	bool kernel_panic;
+	struct notifier_block panic_notifier;
+};
+
+#define to_ltc2952(p, m) container_of(p, struct ltc2952_poweroff, m)
+
+/*
+ * This global variable is only needed for pm_power_off. We should
+ * remove it entirely once we don't need the global state anymore.
+ */
+static struct ltc2952_poweroff *ltc2952_data;
+
+/**
+ * ltc2952_poweroff_timer_wde - Timer callback
+ * Toggles the watchdog reset signal each wde_interval
+ *
+ * @timer: corresponding timer
+ *
+ * Returns HRTIMER_RESTART for an infinite loop which will only stop when the
+ * machine actually shuts down
+ */
+static enum hrtimer_restart ltc2952_poweroff_timer_wde(struct hrtimer *timer)
+{
+	ktime_t now;
+	int state;
+	unsigned long overruns;
+	struct ltc2952_poweroff *data = to_ltc2952(timer, timer_wde);
+
+	if (data->kernel_panic)
+		return HRTIMER_NORESTART;
+
+	state = gpiod_get_value(data->gpio_watchdog);
+	gpiod_set_value(data->gpio_watchdog, !state);
+
+	now = hrtimer_cb_get_time(timer);
+	overruns = hrtimer_forward(timer, now, data->wde_interval);
+
+	return HRTIMER_RESTART;
+}
+
+static void ltc2952_poweroff_start_wde(struct ltc2952_poweroff *data)
+{
+	hrtimer_start(&data->timer_wde, data->wde_interval, HRTIMER_MODE_REL);
+}
+
+static enum hrtimer_restart
+ltc2952_poweroff_timer_trigger(struct hrtimer *timer)
+{
+	struct ltc2952_poweroff *data = to_ltc2952(timer, timer_trigger);
+
+	ltc2952_poweroff_start_wde(data);
+	dev_info(data->dev, "executing shutdown\n");
+	orderly_poweroff(true);
+
+	return HRTIMER_NORESTART;
+}
+
+/**
+ * ltc2952_poweroff_handler - Interrupt handler
+ * Triggered each time the trigger signal changes state and (de)activates a
+ * time-out (timer_trigger). Once the time-out is actually reached the shut
+ * down is executed.
+ *
+ * @irq: IRQ number
+ * @dev_id: pointer to the main data structure
+ */
+static irqreturn_t ltc2952_poweroff_handler(int irq, void *dev_id)
+{
+	struct ltc2952_poweroff *data = dev_id;
+
+	if (data->kernel_panic || hrtimer_active(&data->timer_wde)) {
+		/* shutdown is already triggered, nothing to do any more */
+		return IRQ_HANDLED;
+	}
+
+	if (gpiod_get_value(data->gpio_trigger)) {
+		hrtimer_start(&data->timer_trigger, data->trigger_delay,
+			      HRTIMER_MODE_REL);
+	} else {
+		hrtimer_cancel(&data->timer_trigger);
+	}
+	return IRQ_HANDLED;
+}
+
+static void ltc2952_poweroff_kill(void)
+{
+	gpiod_set_value(ltc2952_data->gpio_kill, 1);
+}
+
+static void ltc2952_poweroff_default(struct ltc2952_poweroff *data)
+{
+	data->wde_interval = 300L * NSEC_PER_MSEC;
+	data->trigger_delay = ktime_set(2, 500L * NSEC_PER_MSEC);
+
+	hrtimer_init(&data->timer_trigger, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	data->timer_trigger.function = ltc2952_poweroff_timer_trigger;
+
+	hrtimer_init(&data->timer_wde, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+	data->timer_wde.function = ltc2952_poweroff_timer_wde;
+}
+
+static int ltc2952_poweroff_init(struct platform_device *pdev)
+{
+	int ret;
+	struct ltc2952_poweroff *data = platform_get_drvdata(pdev);
+
+	ltc2952_poweroff_default(data);
+
+	data->gpio_watchdog = devm_gpiod_get(&pdev->dev, "watchdog",
+					     GPIOD_OUT_LOW);
+	if (IS_ERR(data->gpio_watchdog)) {
+		ret = PTR_ERR(data->gpio_watchdog);
+		dev_err(&pdev->dev, "unable to claim gpio \"watchdog\"\n");
+		return ret;
+	}
+
+	data->gpio_kill = devm_gpiod_get(&pdev->dev, "kill", GPIOD_OUT_LOW);
+	if (IS_ERR(data->gpio_kill)) {
+		ret = PTR_ERR(data->gpio_kill);
+		dev_err(&pdev->dev, "unable to claim gpio \"kill\"\n");
+		return ret;
+	}
+
+	data->gpio_trigger = devm_gpiod_get_optional(&pdev->dev, "trigger",
+						     GPIOD_IN);
+	if (IS_ERR(data->gpio_trigger)) {
+		/*
+		 * It's not a problem if the trigger gpio isn't available, but
+		 * it is worth a warning if its use was defined in the device
+		 * tree.
+		 */
+		dev_err(&pdev->dev, "unable to claim gpio \"trigger\"\n");
+		data->gpio_trigger = NULL;
+	}
+
+	if (devm_request_irq(&pdev->dev, gpiod_to_irq(data->gpio_trigger),
+			     ltc2952_poweroff_handler,
+			     (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING),
+			     "ltc2952-poweroff",
+			     data)) {
+		/*
+		 * Some things may have happened:
+		 * - No trigger input was defined
+		 * - Claiming the GPIO failed
+		 * - We could not map to an IRQ
+		 * - We couldn't register an interrupt handler
+		 *
+		 * None of these really are problems, but all of them
+		 * disqualify the push button from controlling the power.
+		 *
+		 * It is therefore important to note that if the ltc2952
+		 * detects a button press for long enough, it will still start
+		 * its own powerdown window and cut the power on us if we don't
+		 * start the watchdog trigger.
+		 */
+		if (data->gpio_trigger) {
+			dev_warn(&pdev->dev,
+				 "unable to configure the trigger interrupt\n");
+			devm_gpiod_put(&pdev->dev, data->gpio_trigger);
+			data->gpio_trigger = NULL;
+		}
+		dev_info(&pdev->dev,
+			 "power down trigger input will not be used\n");
+		ltc2952_poweroff_start_wde(data);
+	}
+
+	return 0;
+}
+
+static int ltc2952_poweroff_notify_panic(struct notifier_block *nb,
+					 unsigned long code, void *unused)
+{
+	struct ltc2952_poweroff *data = to_ltc2952(nb, panic_notifier);
+
+	data->kernel_panic = true;
+	return NOTIFY_DONE;
+}
+
+static int ltc2952_poweroff_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct ltc2952_poweroff *data;
+
+	if (pm_power_off) {
+		dev_err(&pdev->dev, "pm_power_off already registered");
+		return -EBUSY;
+	}
+
+	data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	data->dev = &pdev->dev;
+	platform_set_drvdata(pdev, data);
+
+	ret = ltc2952_poweroff_init(pdev);
+	if (ret)
+		return ret;
+
+	/* TODO: remove ltc2952_data */
+	ltc2952_data = data;
+	pm_power_off = ltc2952_poweroff_kill;
+
+	data->panic_notifier.notifier_call = ltc2952_poweroff_notify_panic;
+	atomic_notifier_chain_register(&panic_notifier_list,
+				       &data->panic_notifier);
+	dev_info(&pdev->dev, "probe successful\n");
+
+	return 0;
+}
+
+static int ltc2952_poweroff_remove(struct platform_device *pdev)
+{
+	struct ltc2952_poweroff *data = platform_get_drvdata(pdev);
+
+	pm_power_off = NULL;
+	hrtimer_cancel(&data->timer_trigger);
+	hrtimer_cancel(&data->timer_wde);
+	atomic_notifier_chain_unregister(&panic_notifier_list,
+					 &data->panic_notifier);
+	return 0;
+}
+
+static const struct of_device_id of_ltc2952_poweroff_match[] = {
+	{ .compatible = "lltc,ltc2952"},
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_ltc2952_poweroff_match);
+
+static struct platform_driver ltc2952_poweroff_driver = {
+	.probe = ltc2952_poweroff_probe,
+	.remove = ltc2952_poweroff_remove,
+	.driver = {
+		.name = "ltc2952-poweroff",
+		.of_match_table = of_ltc2952_poweroff_match,
+	},
+};
+
+module_platform_driver(ltc2952_poweroff_driver);
+
+MODULE_AUTHOR("René Moll <rene.moll@xsens.com>");
+MODULE_DESCRIPTION("LTC PowerPath power-off driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/msm-poweroff.c b/drivers/power/reset/msm-poweroff.c
new file mode 100644
index 000000000..01b8c7169
--- /dev/null
+++ b/drivers/power/reset/msm-poweroff.c
@@ -0,0 +1,80 @@
+/* Copyright (c) 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 and
+ * only 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/delay.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/pm.h>
+
+static void __iomem *msm_ps_hold;
+static int deassert_pshold(struct notifier_block *nb, unsigned long action,
+			   void *data)
+{
+	writel(0, msm_ps_hold);
+	mdelay(10000);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block restart_nb = {
+	.notifier_call = deassert_pshold,
+	.priority = 128,
+};
+
+static void do_msm_poweroff(void)
+{
+	deassert_pshold(&restart_nb, 0, NULL);
+}
+
+static int msm_restart_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *mem;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	msm_ps_hold = devm_ioremap_resource(dev, mem);
+	if (IS_ERR(msm_ps_hold))
+		return PTR_ERR(msm_ps_hold);
+
+	register_restart_handler(&restart_nb);
+
+	pm_power_off = do_msm_poweroff;
+
+	return 0;
+}
+
+static const struct of_device_id of_msm_restart_match[] = {
+	{ .compatible = "qcom,pshold", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, of_msm_restart_match);
+
+static struct platform_driver msm_restart_driver = {
+	.probe = msm_restart_probe,
+	.driver = {
+		.name = "msm-restart",
+		.of_match_table = of_match_ptr(of_msm_restart_match),
+	},
+};
+
+static int __init msm_restart_init(void)
+{
+	return platform_driver_register(&msm_restart_driver);
+}
+device_initcall(msm_restart_init);
diff --git a/drivers/power/reset/ocelot-reset.c b/drivers/power/reset/ocelot-reset.c
new file mode 100644
index 000000000..5a13a5cc8
--- /dev/null
+++ b/drivers/power/reset/ocelot-reset.c
@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Microsemi MIPS SoC reset driver
+ *
+ * License: Dual MIT/GPL
+ * Copyright (c) 2017 Microsemi Corporation
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+struct ocelot_reset_context {
+	void __iomem *base;
+	struct regmap *cpu_ctrl;
+	struct notifier_block restart_handler;
+};
+
+#define ICPU_CFG_CPU_SYSTEM_CTRL_RESET 0x20
+#define CORE_RST_PROTECT BIT(2)
+
+#define SOFT_CHIP_RST BIT(0)
+
+static int ocelot_restart_handle(struct notifier_block *this,
+				 unsigned long mode, void *cmd)
+{
+	struct ocelot_reset_context *ctx = container_of(this, struct
+							ocelot_reset_context,
+							restart_handler);
+
+	/* Make sure the core is not protected from reset */
+	regmap_update_bits(ctx->cpu_ctrl, ICPU_CFG_CPU_SYSTEM_CTRL_RESET,
+			   CORE_RST_PROTECT, 0);
+
+	writel(SOFT_CHIP_RST, ctx->base);
+
+	pr_emerg("Unable to restart system\n");
+	return NOTIFY_DONE;
+}
+
+static int ocelot_reset_probe(struct platform_device *pdev)
+{
+	struct ocelot_reset_context *ctx;
+	struct resource *res;
+
+	struct device *dev = &pdev->dev;
+	int err;
+
+	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	ctx->base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(ctx->base))
+		return PTR_ERR(ctx->base);
+
+	ctx->cpu_ctrl = syscon_regmap_lookup_by_compatible("mscc,ocelot-cpu-syscon");
+	if (IS_ERR(ctx->cpu_ctrl))
+		return PTR_ERR(ctx->cpu_ctrl);
+
+	ctx->restart_handler.notifier_call = ocelot_restart_handle;
+	ctx->restart_handler.priority = 192;
+	err = register_restart_handler(&ctx->restart_handler);
+	if (err)
+		dev_err(dev, "can't register restart notifier (err=%d)\n", err);
+
+	return err;
+}
+
+static const struct of_device_id ocelot_reset_of_match[] = {
+	{ .compatible = "mscc,ocelot-chip-reset" },
+	{}
+};
+
+static struct platform_driver ocelot_reset_driver = {
+	.probe = ocelot_reset_probe,
+	.driver = {
+		.name = "ocelot-chip-reset",
+		.of_match_table = ocelot_reset_of_match,
+	},
+};
+builtin_platform_driver(ocelot_reset_driver);
diff --git a/drivers/power/reset/piix4-poweroff.c b/drivers/power/reset/piix4-poweroff.c
new file mode 100644
index 000000000..20ce3ff5e
--- /dev/null
+++ b/drivers/power/reset/piix4-poweroff.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2016 Imagination Technologies
+ * Author: Paul Burton <paul.burton@mips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/pm.h>
+
+static struct pci_dev *pm_dev;
+static resource_size_t io_offset;
+
+enum piix4_pm_io_reg {
+	PIIX4_FUNC3IO_PMSTS			= 0x00,
+#define PIIX4_FUNC3IO_PMSTS_PWRBTN_STS		BIT(8)
+	PIIX4_FUNC3IO_PMCNTRL			= 0x04,
+#define PIIX4_FUNC3IO_PMCNTRL_SUS_EN		BIT(13)
+#define PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF	(0x0 << 10)
+};
+
+#define PIIX4_SUSPEND_MAGIC			0x00120002
+
+static const int piix4_pm_io_region = PCI_BRIDGE_RESOURCES;
+
+static void piix4_poweroff(void)
+{
+	int spec_devid;
+	u16 sts;
+
+	/* Ensure the power button status is clear */
+	while (1) {
+		sts = inw(io_offset + PIIX4_FUNC3IO_PMSTS);
+		if (!(sts & PIIX4_FUNC3IO_PMSTS_PWRBTN_STS))
+			break;
+		outw(sts, io_offset + PIIX4_FUNC3IO_PMSTS);
+	}
+
+	/* Enable entry to suspend */
+	outw(PIIX4_FUNC3IO_PMCNTRL_SUS_TYP_SOFF | PIIX4_FUNC3IO_PMCNTRL_SUS_EN,
+	     io_offset + PIIX4_FUNC3IO_PMCNTRL);
+
+	/* If the special cycle occurs too soon this doesn't work... */
+	mdelay(10);
+
+	/*
+	 * The PIIX4 will enter the suspend state only after seeing a special
+	 * cycle with the correct magic data on the PCI bus. Generate that
+	 * cycle now.
+	 */
+	spec_devid = PCI_DEVID(0, PCI_DEVFN(0x1f, 0x7));
+	pci_bus_write_config_dword(pm_dev->bus, spec_devid, 0,
+				   PIIX4_SUSPEND_MAGIC);
+
+	/* Give the system some time to power down, then error */
+	mdelay(1000);
+	pr_emerg("Unable to poweroff system\n");
+}
+
+static int piix4_poweroff_probe(struct pci_dev *dev,
+				const struct pci_device_id *id)
+{
+	int res;
+
+	if (pm_dev)
+		return -EINVAL;
+
+	/* Request access to the PIIX4 PM IO registers */
+	res = pci_request_region(dev, piix4_pm_io_region,
+				 "PIIX4 PM IO registers");
+	if (res) {
+		dev_err(&dev->dev, "failed to request PM IO registers: %d\n",
+			res);
+		return res;
+	}
+
+	pm_dev = dev;
+	io_offset = pci_resource_start(dev, piix4_pm_io_region);
+	pm_power_off = piix4_poweroff;
+
+	return 0;
+}
+
+static void piix4_poweroff_remove(struct pci_dev *dev)
+{
+	if (pm_power_off == piix4_poweroff)
+		pm_power_off = NULL;
+
+	pci_release_region(dev, piix4_pm_io_region);
+	pm_dev = NULL;
+}
+
+static const struct pci_device_id piix4_poweroff_ids[] = {
+	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_3) },
+	{ 0 },
+};
+
+static struct pci_driver piix4_poweroff_driver = {
+	.name		= "piix4-poweroff",
+	.id_table	= piix4_poweroff_ids,
+	.probe		= piix4_poweroff_probe,
+	.remove		= piix4_poweroff_remove,
+};
+
+module_pci_driver(piix4_poweroff_driver);
+MODULE_AUTHOR("Paul Burton <paul.burton@mips.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/reset/qcom-pon.c b/drivers/power/reset/qcom-pon.c
new file mode 100644
index 000000000..0c4caaa7e
--- /dev/null
+++ b/drivers/power/reset/qcom-pon.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2017-18 Linaro Limited
+
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/reboot-mode.h>
+#include <linux/regmap.h>
+
+#define PON_SOFT_RB_SPARE		0x8f
+
+struct pm8916_pon {
+	struct device *dev;
+	struct regmap *regmap;
+	u32 baseaddr;
+	struct reboot_mode_driver reboot_mode;
+};
+
+static int pm8916_reboot_mode_write(struct reboot_mode_driver *reboot,
+				    unsigned int magic)
+{
+	struct pm8916_pon *pon = container_of
+			(reboot, struct pm8916_pon, reboot_mode);
+	int ret;
+
+	ret = regmap_update_bits(pon->regmap,
+				 pon->baseaddr + PON_SOFT_RB_SPARE,
+				 0xfc, magic << 2);
+	if (ret < 0)
+		dev_err(pon->dev, "update reboot mode bits failed\n");
+
+	return ret;
+}
+
+static int pm8916_pon_probe(struct platform_device *pdev)
+{
+	struct pm8916_pon *pon;
+	int error;
+
+	pon = devm_kzalloc(&pdev->dev, sizeof(*pon), GFP_KERNEL);
+	if (!pon)
+		return -ENOMEM;
+
+	pon->dev = &pdev->dev;
+
+	pon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!pon->regmap) {
+		dev_err(&pdev->dev, "failed to locate regmap\n");
+		return -ENODEV;
+	}
+
+	error = of_property_read_u32(pdev->dev.of_node, "reg",
+				     &pon->baseaddr);
+	if (error)
+		return error;
+
+	pon->reboot_mode.dev = &pdev->dev;
+	pon->reboot_mode.write = pm8916_reboot_mode_write;
+	error = devm_reboot_mode_register(&pdev->dev, &pon->reboot_mode);
+	if (error) {
+		dev_err(&pdev->dev, "can't register reboot mode\n");
+		return error;
+	}
+
+	platform_set_drvdata(pdev, pon);
+
+	return devm_of_platform_populate(&pdev->dev);
+}
+
+static const struct of_device_id pm8916_pon_id_table[] = {
+	{ .compatible = "qcom,pm8916-pon" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, pm8916_pon_id_table);
+
+static struct platform_driver pm8916_pon_driver = {
+	.probe = pm8916_pon_probe,
+	.driver = {
+		.name = "pm8916-pon",
+		.of_match_table = of_match_ptr(pm8916_pon_id_table),
+	},
+};
+module_platform_driver(pm8916_pon_driver);
+
+MODULE_DESCRIPTION("pm8916 Power On driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/qnap-poweroff.c b/drivers/power/reset/qnap-poweroff.c
new file mode 100644
index 000000000..2789a61ce
--- /dev/null
+++ b/drivers/power/reset/qnap-poweroff.c
@@ -0,0 +1,140 @@
+/*
+ * QNAP Turbo NAS Board power off. Can also be used on Synology devices.
+ *
+ * Copyright (C) 2012 Andrew Lunn <andrew@lunn.ch>
+ *
+ * Based on the code from:
+ *
+ * Copyright (C) 2009  Martin Michlmayr <tbm@cyrius.com>
+ * Copyright (C) 2008  Byron Bradley <byron.bbradley@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/serial_reg.h>
+#include <linux/kallsyms.h>
+#include <linux/of.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+
+#define UART1_REG(x)	(base + ((UART_##x) << 2))
+
+struct power_off_cfg {
+	u32 baud;
+	char cmd;
+};
+
+static const struct power_off_cfg qnap_power_off_cfg = {
+	.baud = 19200,
+	.cmd = 'A',
+};
+
+static const struct power_off_cfg synology_power_off_cfg = {
+	.baud = 9600,
+	.cmd = '1',
+};
+
+static const struct of_device_id qnap_power_off_of_match_table[] = {
+	{ .compatible = "qnap,power-off",
+	  .data = &qnap_power_off_cfg,
+	},
+	{ .compatible = "synology,power-off",
+	  .data = &synology_power_off_cfg,
+	},
+	{}
+};
+MODULE_DEVICE_TABLE(of, qnap_power_off_of_match_table);
+
+static void __iomem *base;
+static unsigned long tclk;
+static const struct power_off_cfg *cfg;
+
+static void qnap_power_off(void)
+{
+	const unsigned divisor = ((tclk + (8 * cfg->baud)) / (16 * cfg->baud));
+
+	pr_err("%s: triggering power-off...\n", __func__);
+
+	/* hijack UART1 and reset into sane state */
+	writel(0x83, UART1_REG(LCR));
+	writel(divisor & 0xff, UART1_REG(DLL));
+	writel((divisor >> 8) & 0xff, UART1_REG(DLM));
+	writel(0x03, UART1_REG(LCR));
+	writel(0x00, UART1_REG(IER));
+	writel(0x00, UART1_REG(FCR));
+	writel(0x00, UART1_REG(MCR));
+
+	/* send the power-off command to PIC */
+	writel(cfg->cmd, UART1_REG(TX));
+}
+
+static int qnap_power_off_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	struct resource *res;
+	struct clk *clk;
+	char symname[KSYM_NAME_LEN];
+
+	const struct of_device_id *match =
+		of_match_node(qnap_power_off_of_match_table, np);
+	cfg = match->data;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(&pdev->dev, "Missing resource");
+		return -EINVAL;
+	}
+
+	base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+	if (!base) {
+		dev_err(&pdev->dev, "Unable to map resource");
+		return -EINVAL;
+	}
+
+	/* We need to know tclk in order to calculate the UART divisor */
+	clk = devm_clk_get(&pdev->dev, NULL);
+	if (IS_ERR(clk)) {
+		dev_err(&pdev->dev, "Clk missing");
+		return PTR_ERR(clk);
+	}
+
+	tclk = clk_get_rate(clk);
+
+	/* Check that nothing else has already setup a handler */
+	if (pm_power_off) {
+		lookup_symbol_name((ulong)pm_power_off, symname);
+		dev_err(&pdev->dev,
+			"pm_power_off already claimed %p %s",
+			pm_power_off, symname);
+		return -EBUSY;
+	}
+	pm_power_off = qnap_power_off;
+
+	return 0;
+}
+
+static int qnap_power_off_remove(struct platform_device *pdev)
+{
+	pm_power_off = NULL;
+	return 0;
+}
+
+static struct platform_driver qnap_power_off_driver = {
+	.probe	= qnap_power_off_probe,
+	.remove	= qnap_power_off_remove,
+	.driver	= {
+		.name	= "qnap_power_off",
+		.of_match_table = of_match_ptr(qnap_power_off_of_match_table),
+	},
+};
+module_platform_driver(qnap_power_off_driver);
+
+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch>");
+MODULE_DESCRIPTION("QNAP Power off driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/reboot-mode.c b/drivers/power/reset/reboot-mode.c
new file mode 100644
index 000000000..8f975ca0a
--- /dev/null
+++ b/drivers/power/reset/reboot-mode.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * 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/device.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/reboot.h>
+#include <linux/reboot-mode.h>
+
+#define PREFIX "mode-"
+
+struct mode_info {
+	const char *mode;
+	u32 magic;
+	struct list_head list;
+};
+
+static unsigned int get_reboot_mode_magic(struct reboot_mode_driver *reboot,
+					  const char *cmd)
+{
+	const char *normal = "normal";
+	int magic = 0;
+	struct mode_info *info;
+
+	if (!cmd)
+		cmd = normal;
+
+	list_for_each_entry(info, &reboot->head, list) {
+		if (!strcmp(info->mode, cmd)) {
+			magic = info->magic;
+			break;
+		}
+	}
+
+	return magic;
+}
+
+static int reboot_mode_notify(struct notifier_block *this,
+			      unsigned long mode, void *cmd)
+{
+	struct reboot_mode_driver *reboot;
+	unsigned int magic;
+
+	reboot = container_of(this, struct reboot_mode_driver, reboot_notifier);
+	magic = get_reboot_mode_magic(reboot, cmd);
+	if (magic)
+		reboot->write(reboot, magic);
+
+	return NOTIFY_DONE;
+}
+
+/**
+ * reboot_mode_register - register a reboot mode driver
+ * @reboot: reboot mode driver
+ *
+ * Returns: 0 on success or a negative error code on failure.
+ */
+int reboot_mode_register(struct reboot_mode_driver *reboot)
+{
+	struct mode_info *info;
+	struct property *prop;
+	struct device_node *np = reboot->dev->of_node;
+	size_t len = strlen(PREFIX);
+	int ret;
+
+	INIT_LIST_HEAD(&reboot->head);
+
+	for_each_property_of_node(np, prop) {
+		if (strncmp(prop->name, PREFIX, len))
+			continue;
+
+		info = devm_kzalloc(reboot->dev, sizeof(*info), GFP_KERNEL);
+		if (!info) {
+			ret = -ENOMEM;
+			goto error;
+		}
+
+		if (of_property_read_u32(np, prop->name, &info->magic)) {
+			dev_err(reboot->dev, "reboot mode %s without magic number\n",
+				info->mode);
+			devm_kfree(reboot->dev, info);
+			continue;
+		}
+
+		info->mode = kstrdup_const(prop->name + len, GFP_KERNEL);
+		if (!info->mode) {
+			ret =  -ENOMEM;
+			goto error;
+		} else if (info->mode[0] == '\0') {
+			kfree_const(info->mode);
+			ret = -EINVAL;
+			dev_err(reboot->dev, "invalid mode name(%s): too short!\n",
+				prop->name);
+			goto error;
+		}
+
+		list_add_tail(&info->list, &reboot->head);
+	}
+
+	reboot->reboot_notifier.notifier_call = reboot_mode_notify;
+	register_reboot_notifier(&reboot->reboot_notifier);
+
+	return 0;
+
+error:
+	list_for_each_entry(info, &reboot->head, list)
+		kfree_const(info->mode);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(reboot_mode_register);
+
+/**
+ * reboot_mode_unregister - unregister a reboot mode driver
+ * @reboot: reboot mode driver
+ */
+int reboot_mode_unregister(struct reboot_mode_driver *reboot)
+{
+	struct mode_info *info;
+
+	unregister_reboot_notifier(&reboot->reboot_notifier);
+
+	list_for_each_entry(info, &reboot->head, list)
+		kfree_const(info->mode);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(reboot_mode_unregister);
+
+static void devm_reboot_mode_release(struct device *dev, void *res)
+{
+	reboot_mode_unregister(*(struct reboot_mode_driver **)res);
+}
+
+/**
+ * devm_reboot_mode_register() - resource managed reboot_mode_register()
+ * @dev: device to associate this resource with
+ * @reboot: reboot mode driver
+ *
+ * Returns: 0 on success or a negative error code on failure.
+ */
+int devm_reboot_mode_register(struct device *dev,
+			      struct reboot_mode_driver *reboot)
+{
+	struct reboot_mode_driver **dr;
+	int rc;
+
+	dr = devres_alloc(devm_reboot_mode_release, sizeof(*dr), GFP_KERNEL);
+	if (!dr)
+		return -ENOMEM;
+
+	rc = reboot_mode_register(reboot);
+	if (rc) {
+		devres_free(dr);
+		return rc;
+	}
+
+	*dr = reboot;
+	devres_add(dev, dr);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(devm_reboot_mode_register);
+
+static int devm_reboot_mode_match(struct device *dev, void *res, void *data)
+{
+	struct reboot_mode_driver **p = res;
+
+	if (WARN_ON(!p || !*p))
+		return 0;
+
+	return *p == data;
+}
+
+/**
+ * devm_reboot_mode_unregister() - resource managed reboot_mode_unregister()
+ * @dev: device to associate this resource with
+ * @reboot: reboot mode driver
+ */
+void devm_reboot_mode_unregister(struct device *dev,
+				 struct reboot_mode_driver *reboot)
+{
+	WARN_ON(devres_release(dev,
+			       devm_reboot_mode_release,
+			       devm_reboot_mode_match, reboot));
+}
+EXPORT_SYMBOL_GPL(devm_reboot_mode_unregister);
+
+MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com");
+MODULE_DESCRIPTION("System reboot mode core library");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/restart-poweroff.c b/drivers/power/reset/restart-poweroff.c
new file mode 100644
index 000000000..41b22c4d5
--- /dev/null
+++ b/drivers/power/reset/restart-poweroff.c
@@ -0,0 +1,65 @@
+/*
+ * Power off by restarting and let u-boot keep hold of the machine
+ * until the user presses a button for example.
+ *
+ * Andrew Lunn <andrew@lunn.ch>
+ *
+ * Copyright (C) 2012 Andrew Lunn
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/of_platform.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+
+static void restart_poweroff_do_poweroff(void)
+{
+	reboot_mode = REBOOT_HARD;
+	machine_restart(NULL);
+}
+
+static int restart_poweroff_probe(struct platform_device *pdev)
+{
+	/* If a pm_power_off function has already been added, leave it alone */
+	if (pm_power_off != NULL) {
+		dev_err(&pdev->dev,
+			"pm_power_off function already registered");
+		return -EBUSY;
+	}
+
+	pm_power_off = &restart_poweroff_do_poweroff;
+	return 0;
+}
+
+static int restart_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == &restart_poweroff_do_poweroff)
+		pm_power_off = NULL;
+
+	return 0;
+}
+
+static const struct of_device_id of_restart_poweroff_match[] = {
+	{ .compatible = "restart-poweroff", },
+	{},
+};
+
+static struct platform_driver restart_poweroff_driver = {
+	.probe = restart_poweroff_probe,
+	.remove = restart_poweroff_remove,
+	.driver = {
+		.name = "poweroff-restart",
+		.of_match_table = of_restart_poweroff_match,
+	},
+};
+module_platform_driver(restart_poweroff_driver);
+
+MODULE_AUTHOR("Andrew Lunn <andrew@lunn.ch");
+MODULE_DESCRIPTION("restart poweroff driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:poweroff-restart");
diff --git a/drivers/power/reset/rmobile-reset.c b/drivers/power/reset/rmobile-reset.c
new file mode 100644
index 000000000..e6569df76
--- /dev/null
+++ b/drivers/power/reset/rmobile-reset.c
@@ -0,0 +1,91 @@
+/*
+ * Renesas R-Mobile Reset Driver
+ *
+ * Copyright (C) 2014 Glider bvba
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/printk.h>
+#include <linux/reboot.h>
+
+/* SYSC Register Bank 2 */
+#define RESCNT2		0x20		/* Reset Control Register 2 */
+
+/* Reset Control Register 2 */
+#define RESCNT2_PRES	0x80000000	/* Soft power-on reset */
+
+static void __iomem *sysc_base2;
+
+static int rmobile_reset_handler(struct notifier_block *this,
+				 unsigned long mode, void *cmd)
+{
+	pr_debug("%s %lu\n", __func__, mode);
+
+	/* Let's assume we have acquired the HPB semaphore */
+	writel(RESCNT2_PRES, sysc_base2 + RESCNT2);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block rmobile_reset_nb = {
+	.notifier_call = rmobile_reset_handler,
+	.priority = 192,
+};
+
+static int rmobile_reset_probe(struct platform_device *pdev)
+{
+	int error;
+
+	sysc_base2 = of_iomap(pdev->dev.of_node, 1);
+	if (!sysc_base2)
+		return -ENODEV;
+
+	error = register_restart_handler(&rmobile_reset_nb);
+	if (error) {
+		dev_err(&pdev->dev,
+			"cannot register restart handler (err=%d)\n", error);
+		goto fail_unmap;
+	}
+
+	return 0;
+
+fail_unmap:
+	iounmap(sysc_base2);
+	return error;
+}
+
+static int rmobile_reset_remove(struct platform_device *pdev)
+{
+	unregister_restart_handler(&rmobile_reset_nb);
+	iounmap(sysc_base2);
+	return 0;
+}
+
+static const struct of_device_id rmobile_reset_of_match[] = {
+	{ .compatible = "renesas,sysc-rmobile", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rmobile_reset_of_match);
+
+static struct platform_driver rmobile_reset_driver = {
+	.probe = rmobile_reset_probe,
+	.remove = rmobile_reset_remove,
+	.driver = {
+		.name = "rmobile_reset",
+		.of_match_table = rmobile_reset_of_match,
+	},
+};
+
+module_platform_driver(rmobile_reset_driver);
+
+MODULE_DESCRIPTION("Renesas R-Mobile Reset Driver");
+MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/sc27xx-poweroff.c b/drivers/power/reset/sc27xx-poweroff.c
new file mode 100644
index 000000000..29fb08b8f
--- /dev/null
+++ b/drivers/power/reset/sc27xx-poweroff.c
@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2018 Spreadtrum Communications Inc.
+ * Copyright (C) 2018 Linaro Ltd.
+ */
+
+#include <linux/cpu.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+#include <linux/syscore_ops.h>
+
+#define SC27XX_PWR_PD_HW	0xc2c
+#define SC27XX_PWR_OFF_EN	BIT(0)
+
+static struct regmap *regmap;
+
+/*
+ * On Spreadtrum platform, we need power off system through external SC27xx
+ * series PMICs, and it is one similar SPI bus mapped by regmap to access PMIC,
+ * which is not fast io access.
+ *
+ * So before stopping other cores, we need release other cores' resource by
+ * taking cpus down to avoid racing regmap or spi mutex lock when poweroff
+ * system through PMIC.
+ */
+static void sc27xx_poweroff_shutdown(void)
+{
+#ifdef CONFIG_PM_SLEEP_SMP
+	int cpu = smp_processor_id();
+
+	freeze_secondary_cpus(cpu);
+#endif
+}
+
+static struct syscore_ops poweroff_syscore_ops = {
+	.shutdown = sc27xx_poweroff_shutdown,
+};
+
+static void sc27xx_poweroff_do_poweroff(void)
+{
+	regmap_write(regmap, SC27XX_PWR_PD_HW, SC27XX_PWR_OFF_EN);
+}
+
+static int sc27xx_poweroff_probe(struct platform_device *pdev)
+{
+	if (regmap)
+		return -EINVAL;
+
+	regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!regmap)
+		return -ENODEV;
+
+	pm_power_off = sc27xx_poweroff_do_poweroff;
+	register_syscore_ops(&poweroff_syscore_ops);
+	return 0;
+}
+
+static struct platform_driver sc27xx_poweroff_driver = {
+	.probe = sc27xx_poweroff_probe,
+	.driver = {
+		.name = "sc27xx-poweroff",
+	},
+};
+builtin_platform_driver(sc27xx_poweroff_driver);
diff --git a/drivers/power/reset/st-poweroff.c b/drivers/power/reset/st-poweroff.c
new file mode 100644
index 000000000..2046b3123
--- /dev/null
+++ b/drivers/power/reset/st-poweroff.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2014 STMicroelectronics
+ *
+ * Power off Restart driver, used in STMicroelectronics devices.
+ *
+ * Author: Christophe Kerello <christophe.kerello@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/module.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+struct reset_syscfg {
+	struct regmap *regmap;
+	/* syscfg used for reset */
+	unsigned int offset_rst;
+	unsigned int mask_rst;
+	/* syscfg used for unmask the reset */
+	unsigned int offset_rst_msk;
+	unsigned int mask_rst_msk;
+};
+
+/* STiH407 */
+#define STIH407_SYSCFG_4000	0x0
+#define STIH407_SYSCFG_4008	0x20
+
+static struct reset_syscfg stih407_reset = {
+	.offset_rst = STIH407_SYSCFG_4000,
+	.mask_rst = BIT(0),
+	.offset_rst_msk = STIH407_SYSCFG_4008,
+	.mask_rst_msk = BIT(0)
+};
+
+
+static struct reset_syscfg *st_restart_syscfg;
+
+static int st_restart(struct notifier_block *this, unsigned long mode,
+		      void *cmd)
+{
+	/* reset syscfg updated */
+	regmap_update_bits(st_restart_syscfg->regmap,
+			   st_restart_syscfg->offset_rst,
+			   st_restart_syscfg->mask_rst,
+			   0);
+
+	/* unmask the reset */
+	regmap_update_bits(st_restart_syscfg->regmap,
+			   st_restart_syscfg->offset_rst_msk,
+			   st_restart_syscfg->mask_rst_msk,
+			   0);
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block st_restart_nb = {
+	.notifier_call = st_restart,
+	.priority = 192,
+};
+
+static const struct of_device_id st_reset_of_match[] = {
+	{
+		.compatible = "st,stih407-restart",
+		.data = (void *)&stih407_reset,
+	},
+	{}
+};
+
+static int st_reset_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	const struct of_device_id *match;
+	struct device *dev = &pdev->dev;
+
+	match = of_match_device(st_reset_of_match, dev);
+	if (!match)
+		return -ENODEV;
+
+	st_restart_syscfg = (struct reset_syscfg *)match->data;
+
+	st_restart_syscfg->regmap =
+		syscon_regmap_lookup_by_phandle(np, "st,syscfg");
+	if (IS_ERR(st_restart_syscfg->regmap)) {
+		dev_err(dev, "No syscfg phandle specified\n");
+		return PTR_ERR(st_restart_syscfg->regmap);
+	}
+
+	return register_restart_handler(&st_restart_nb);
+}
+
+static struct platform_driver st_reset_driver = {
+	.probe = st_reset_probe,
+	.driver = {
+		.name = "st_reset",
+		.of_match_table = st_reset_of_match,
+	},
+};
+
+static int __init st_reset_init(void)
+{
+	return platform_driver_register(&st_reset_driver);
+}
+
+device_initcall(st_reset_init);
+
+MODULE_AUTHOR("Christophe Kerello <christophe.kerello@st.com>");
+MODULE_DESCRIPTION("STMicroelectronics Power off Restart driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/syscon-poweroff.c b/drivers/power/reset/syscon-poweroff.c
new file mode 100644
index 000000000..f9f1cb54f
--- /dev/null
+++ b/drivers/power/reset/syscon-poweroff.c
@@ -0,0 +1,115 @@
+/*
+ * Generic Syscon Poweroff Driver
+ *
+ * Copyright (c) 2015, National Instruments Corp.
+ * Author: Moritz Fischer <moritz.fischer@ettus.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kallsyms.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/regmap.h>
+
+static struct regmap *map;
+static u32 offset;
+static u32 value;
+static u32 mask;
+
+static void syscon_poweroff(void)
+{
+	/* Issue the poweroff */
+	regmap_update_bits(map, offset, mask, value);
+
+	mdelay(1000);
+
+	pr_emerg("Unable to poweroff system\n");
+}
+
+static int syscon_poweroff_probe(struct platform_device *pdev)
+{
+	char symname[KSYM_NAME_LEN];
+	int mask_err, value_err;
+
+	map = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap");
+	if (IS_ERR(map)) {
+		dev_err(&pdev->dev, "unable to get syscon");
+		return PTR_ERR(map);
+	}
+
+	if (of_property_read_u32(pdev->dev.of_node, "offset", &offset)) {
+		dev_err(&pdev->dev, "unable to read 'offset'");
+		return -EINVAL;
+	}
+
+	value_err = of_property_read_u32(pdev->dev.of_node, "value", &value);
+	mask_err = of_property_read_u32(pdev->dev.of_node, "mask", &mask);
+	if (value_err && mask_err) {
+		dev_err(&pdev->dev, "unable to read 'value' and 'mask'");
+		return -EINVAL;
+	}
+
+	if (value_err) {
+		/* support old binding */
+		value = mask;
+		mask = 0xFFFFFFFF;
+	} else if (mask_err) {
+		/* support value without mask*/
+		mask = 0xFFFFFFFF;
+	}
+
+	if (pm_power_off) {
+		lookup_symbol_name((ulong)pm_power_off, symname);
+		dev_err(&pdev->dev,
+		"pm_power_off already claimed %p %s",
+		pm_power_off, symname);
+		return -EBUSY;
+	}
+
+	pm_power_off = syscon_poweroff;
+
+	return 0;
+}
+
+static int syscon_poweroff_remove(struct platform_device *pdev)
+{
+	if (pm_power_off == syscon_poweroff)
+		pm_power_off = NULL;
+
+	return 0;
+}
+
+static const struct of_device_id syscon_poweroff_of_match[] = {
+	{ .compatible = "syscon-poweroff" },
+	{}
+};
+
+static struct platform_driver syscon_poweroff_driver = {
+	.probe = syscon_poweroff_probe,
+	.remove = syscon_poweroff_remove,
+	.driver = {
+		.name = "syscon-poweroff",
+		.of_match_table = syscon_poweroff_of_match,
+	},
+};
+
+static int __init syscon_poweroff_register(void)
+{
+	return platform_driver_register(&syscon_poweroff_driver);
+}
+device_initcall(syscon_poweroff_register);
diff --git a/drivers/power/reset/syscon-reboot-mode.c b/drivers/power/reset/syscon-reboot-mode.c
new file mode 100644
index 000000000..563a97d7f
--- /dev/null
+++ b/drivers/power/reset/syscon-reboot-mode.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/reboot-mode.h>
+
+struct syscon_reboot_mode {
+	struct regmap *map;
+	struct reboot_mode_driver reboot;
+	u32 offset;
+	u32 mask;
+};
+
+static int syscon_reboot_mode_write(struct reboot_mode_driver *reboot,
+				    unsigned int magic)
+{
+	struct syscon_reboot_mode *syscon_rbm;
+	int ret;
+
+	syscon_rbm = container_of(reboot, struct syscon_reboot_mode, reboot);
+
+	ret = regmap_update_bits(syscon_rbm->map, syscon_rbm->offset,
+				 syscon_rbm->mask, magic);
+	if (ret < 0)
+		dev_err(reboot->dev, "update reboot mode bits failed\n");
+
+	return ret;
+}
+
+static int syscon_reboot_mode_probe(struct platform_device *pdev)
+{
+	int ret;
+	struct syscon_reboot_mode *syscon_rbm;
+
+	syscon_rbm = devm_kzalloc(&pdev->dev, sizeof(*syscon_rbm), GFP_KERNEL);
+	if (!syscon_rbm)
+		return -ENOMEM;
+
+	syscon_rbm->reboot.dev = &pdev->dev;
+	syscon_rbm->reboot.write = syscon_reboot_mode_write;
+	syscon_rbm->mask = 0xffffffff;
+
+	syscon_rbm->map = syscon_node_to_regmap(pdev->dev.parent->of_node);
+	if (IS_ERR(syscon_rbm->map))
+		return PTR_ERR(syscon_rbm->map);
+
+	if (of_property_read_u32(pdev->dev.of_node, "offset",
+	    &syscon_rbm->offset))
+		return -EINVAL;
+
+	of_property_read_u32(pdev->dev.of_node, "mask", &syscon_rbm->mask);
+
+	ret = devm_reboot_mode_register(&pdev->dev, &syscon_rbm->reboot);
+	if (ret)
+		dev_err(&pdev->dev, "can't register reboot mode\n");
+
+	return ret;
+}
+
+static const struct of_device_id syscon_reboot_mode_of_match[] = {
+	{ .compatible = "syscon-reboot-mode" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, syscon_reboot_mode_of_match);
+
+static struct platform_driver syscon_reboot_mode_driver = {
+	.probe = syscon_reboot_mode_probe,
+	.driver = {
+		.name = "syscon-reboot-mode",
+		.of_match_table = syscon_reboot_mode_of_match,
+	},
+};
+module_platform_driver(syscon_reboot_mode_driver);
+
+MODULE_AUTHOR("Andy Yan <andy.yan@rock-chips.com");
+MODULE_DESCRIPTION("SYSCON reboot mode driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/syscon-reboot.c b/drivers/power/reset/syscon-reboot.c
new file mode 100644
index 000000000..7d0d269a0
--- /dev/null
+++ b/drivers/power/reset/syscon-reboot.c
@@ -0,0 +1,91 @@
+/*
+ * Generic Syscon Reboot Driver
+ *
+ * Copyright (c) 2013, Applied Micro Circuits Corporation
+ * Author: Feng Kan <fkan@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/regmap.h>
+
+struct syscon_reboot_context {
+	struct regmap *map;
+	u32 offset;
+	u32 mask;
+	struct notifier_block restart_handler;
+};
+
+static int syscon_restart_handle(struct notifier_block *this,
+					unsigned long mode, void *cmd)
+{
+	struct syscon_reboot_context *ctx =
+			container_of(this, struct syscon_reboot_context,
+					restart_handler);
+
+	/* Issue the reboot */
+	regmap_write(ctx->map, ctx->offset, ctx->mask);
+
+	mdelay(1000);
+
+	pr_emerg("Unable to restart system\n");
+	return NOTIFY_DONE;
+}
+
+static int syscon_reboot_probe(struct platform_device *pdev)
+{
+	struct syscon_reboot_context *ctx;
+	struct device *dev = &pdev->dev;
+	int err;
+
+	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->map = syscon_regmap_lookup_by_phandle(dev->of_node, "regmap");
+	if (IS_ERR(ctx->map))
+		return PTR_ERR(ctx->map);
+
+	if (of_property_read_u32(pdev->dev.of_node, "offset", &ctx->offset))
+		return -EINVAL;
+
+	if (of_property_read_u32(pdev->dev.of_node, "mask", &ctx->mask))
+		return -EINVAL;
+
+	ctx->restart_handler.notifier_call = syscon_restart_handle;
+	ctx->restart_handler.priority = 192;
+	err = register_restart_handler(&ctx->restart_handler);
+	if (err)
+		dev_err(dev, "can't register restart notifier (err=%d)\n", err);
+
+	return err;
+}
+
+static const struct of_device_id syscon_reboot_of_match[] = {
+	{ .compatible = "syscon-reboot" },
+	{}
+};
+
+static struct platform_driver syscon_reboot_driver = {
+	.probe = syscon_reboot_probe,
+	.driver = {
+		.name = "syscon-reboot",
+		.of_match_table = syscon_reboot_of_match,
+	},
+};
+builtin_platform_driver(syscon_reboot_driver);
diff --git a/drivers/power/reset/vexpress-poweroff.c b/drivers/power/reset/vexpress-poweroff.c
new file mode 100644
index 000000000..8fb43c443
--- /dev/null
+++ b/drivers/power/reset/vexpress-poweroff.c
@@ -0,0 +1,161 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * Copyright (C) 2012 ARM Limited
+ */
+
+#include <linux/delay.h>
+#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/stat.h>
+#include <linux/vexpress.h>
+
+static void vexpress_reset_do(struct device *dev, const char *what)
+{
+	int err = -ENOENT;
+	struct regmap *reg = dev_get_drvdata(dev);
+
+	if (reg) {
+		err = regmap_write(reg, 0, 0);
+		if (!err)
+			mdelay(1000);
+	}
+
+	dev_emerg(dev, "Unable to %s (%d)\n", what, err);
+}
+
+static struct device *vexpress_power_off_device;
+static atomic_t vexpress_restart_nb_refcnt = ATOMIC_INIT(0);
+
+static void vexpress_power_off(void)
+{
+	vexpress_reset_do(vexpress_power_off_device, "power off");
+}
+
+static struct device *vexpress_restart_device;
+
+static int vexpress_restart(struct notifier_block *this, unsigned long mode,
+			     void *cmd)
+{
+	vexpress_reset_do(vexpress_restart_device, "restart");
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block vexpress_restart_nb = {
+	.notifier_call = vexpress_restart,
+	.priority = 128,
+};
+
+static ssize_t vexpress_reset_active_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	return sprintf(buf, "%d\n", vexpress_restart_device == dev);
+}
+
+static ssize_t vexpress_reset_active_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	long value;
+	int err = kstrtol(buf, 0, &value);
+
+	if (!err && value)
+		vexpress_restart_device = dev;
+
+	return err ? err : count;
+}
+
+static DEVICE_ATTR(active, S_IRUGO | S_IWUSR, vexpress_reset_active_show,
+		   vexpress_reset_active_store);
+
+
+enum vexpress_reset_func { FUNC_RESET, FUNC_SHUTDOWN, FUNC_REBOOT };
+
+static const struct of_device_id vexpress_reset_of_match[] = {
+	{
+		.compatible = "arm,vexpress-reset",
+		.data = (void *)FUNC_RESET,
+	}, {
+		.compatible = "arm,vexpress-shutdown",
+		.data = (void *)FUNC_SHUTDOWN
+	}, {
+		.compatible = "arm,vexpress-reboot",
+		.data = (void *)FUNC_REBOOT
+	},
+	{}
+};
+
+static int _vexpress_register_restart_handler(struct device *dev)
+{
+	int err;
+
+	vexpress_restart_device = dev;
+	if (atomic_inc_return(&vexpress_restart_nb_refcnt) == 1) {
+		err = register_restart_handler(&vexpress_restart_nb);
+		if (err) {
+			dev_err(dev, "cannot register restart handler (err=%d)\n", err);
+			atomic_dec(&vexpress_restart_nb_refcnt);
+			return err;
+		}
+	}
+	device_create_file(dev, &dev_attr_active);
+
+	return 0;
+}
+
+static int vexpress_reset_probe(struct platform_device *pdev)
+{
+	const struct of_device_id *match =
+			of_match_device(vexpress_reset_of_match, &pdev->dev);
+	struct regmap *regmap;
+	int ret = 0;
+
+	if (!match)
+		return -EINVAL;
+
+	regmap = devm_regmap_init_vexpress_config(&pdev->dev);
+	if (IS_ERR(regmap))
+		return PTR_ERR(regmap);
+	dev_set_drvdata(&pdev->dev, regmap);
+
+	switch ((enum vexpress_reset_func)match->data) {
+	case FUNC_SHUTDOWN:
+		vexpress_power_off_device = &pdev->dev;
+		pm_power_off = vexpress_power_off;
+		break;
+	case FUNC_RESET:
+		if (!vexpress_restart_device)
+			ret = _vexpress_register_restart_handler(&pdev->dev);
+		break;
+	case FUNC_REBOOT:
+		ret = _vexpress_register_restart_handler(&pdev->dev);
+		break;
+	};
+
+	return ret;
+}
+
+static struct platform_driver vexpress_reset_driver = {
+	.probe = vexpress_reset_probe,
+	.driver = {
+		.name = "vexpress-reset",
+		.of_match_table = vexpress_reset_of_match,
+		.suppress_bind_attrs = true,
+	},
+};
+
+static int __init vexpress_reset_init(void)
+{
+	return platform_driver_register(&vexpress_reset_driver);
+}
+device_initcall(vexpress_reset_init);
diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c
new file mode 100644
index 000000000..73c3d93e5
--- /dev/null
+++ b/drivers/power/reset/xgene-reboot.c
@@ -0,0 +1,109 @@
+/*
+ * AppliedMicro X-Gene SoC Reboot Driver
+ *
+ * Copyright (c) 2013, Applied Micro Circuits Corporation
+ * Author: Feng Kan <fkan@apm.com>
+ * Author: Loc Ho <lho@apm.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This driver provides system reboot functionality for APM X-Gene SoC.
+ * For system shutdown, this is board specify. If a board designer
+ * implements GPIO shutdown, use the gpio-poweroff.c driver.
+ */
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/notifier.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+
+struct xgene_reboot_context {
+	struct device *dev;
+	void *csr;
+	u32 mask;
+	struct notifier_block restart_handler;
+};
+
+static int xgene_restart_handler(struct notifier_block *this,
+				 unsigned long mode, void *cmd)
+{
+	struct xgene_reboot_context *ctx =
+		container_of(this, struct xgene_reboot_context,
+			     restart_handler);
+
+	/* Issue the reboot */
+	writel(ctx->mask, ctx->csr);
+
+	mdelay(1000);
+
+	dev_emerg(ctx->dev, "Unable to restart system\n");
+
+	return NOTIFY_DONE;
+}
+
+static int xgene_reboot_probe(struct platform_device *pdev)
+{
+	struct xgene_reboot_context *ctx;
+	struct device *dev = &pdev->dev;
+	int err;
+
+	ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->csr = of_iomap(dev->of_node, 0);
+	if (!ctx->csr) {
+		dev_err(dev, "can not map resource\n");
+		return -ENODEV;
+	}
+
+	if (of_property_read_u32(dev->of_node, "mask", &ctx->mask))
+		ctx->mask = 0xFFFFFFFF;
+
+	ctx->dev = dev;
+	ctx->restart_handler.notifier_call = xgene_restart_handler;
+	ctx->restart_handler.priority = 128;
+	err = register_restart_handler(&ctx->restart_handler);
+	if (err) {
+		iounmap(ctx->csr);
+		dev_err(dev, "cannot register restart handler (err=%d)\n", err);
+	}
+
+	return err;
+}
+
+static const struct of_device_id xgene_reboot_of_match[] = {
+	{ .compatible = "apm,xgene-reboot" },
+	{}
+};
+
+static struct platform_driver xgene_reboot_driver = {
+	.probe = xgene_reboot_probe,
+	.driver = {
+		.name = "xgene-reboot",
+		.of_match_table = xgene_reboot_of_match,
+	},
+};
+
+static int __init xgene_reboot_init(void)
+{
+	return platform_driver_register(&xgene_reboot_driver);
+}
+device_initcall(xgene_reboot_init);
diff --git a/drivers/power/reset/zx-reboot.c b/drivers/power/reset/zx-reboot.c
new file mode 100644
index 000000000..186901c96
--- /dev/null
+++ b/drivers/power/reset/zx-reboot.c
@@ -0,0 +1,89 @@
+/*
+ * ZTE zx296702 SoC reset code
+ *
+ * Copyright (c) 2015 Linaro Ltd.
+ *
+ * Author: Jun Nie <jun.nie@linaro.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/notifier.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/reboot.h>
+
+static void __iomem *base;
+static void __iomem *pcu_base;
+
+static int zx_restart_handler(struct notifier_block *this,
+			      unsigned long mode, void *cmd)
+{
+	writel_relaxed(1, base + 0xb0);
+	writel_relaxed(1, pcu_base + 0x34);
+
+	mdelay(50);
+	pr_emerg("Unable to restart system\n");
+
+	return NOTIFY_DONE;
+}
+
+static struct notifier_block zx_restart_nb = {
+	.notifier_call = zx_restart_handler,
+	.priority = 128,
+};
+
+static int zx_reboot_probe(struct platform_device *pdev)
+{
+	struct device_node *np = pdev->dev.of_node;
+	int err;
+
+	base = of_iomap(np, 0);
+	if (!base) {
+		WARN(1, "failed to map base address");
+		return -ENODEV;
+	}
+
+	np = of_find_compatible_node(NULL, NULL, "zte,zx296702-pcu");
+	pcu_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!pcu_base) {
+		iounmap(base);
+		WARN(1, "failed to map pcu_base address");
+		return -ENODEV;
+	}
+
+	err = register_restart_handler(&zx_restart_nb);
+	if (err) {
+		iounmap(base);
+		iounmap(pcu_base);
+		dev_err(&pdev->dev, "Register restart handler failed(err=%d)\n",
+			err);
+	}
+
+	return err;
+}
+
+static const struct of_device_id zx_reboot_of_match[] = {
+	{ .compatible = "zte,sysctrl" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, zx_reboot_of_match);
+
+static struct platform_driver zx_reboot_driver = {
+	.probe = zx_reboot_probe,
+	.driver = {
+		.name = "zx-reboot",
+		.of_match_table = zx_reboot_of_match,
+	},
+};
+module_platform_driver(zx_reboot_driver);
+
+MODULE_DESCRIPTION("ZTE SoCs reset driver");
+MODULE_AUTHOR("Jun Nie <jun.nie@linaro.org>");
+MODULE_LICENSE("GPL v2");