4 files changed, 99 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
new file mode 100644
index 000000000000..dc7c9bad63ea
--- /dev/null
+++ b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
@@ -0,0 +1,23 @@
+i.mx6 Poweroff Driver
+SNVS_LPCR in SNVS module can power off the whole system by pull
+PMIC_ON_REQ low if PMIC_ON_REQ is connected with external PMIC.
+If you don't want to use PMIC_ON_REQ as power on/off control,
+please set status='disabled' to disable this driver.
+Required Properties:
+-compatible: "fsl,sec-v4.0-poweroff"
+-reg: Specifies the physical address of the SNVS_LPCR register
+Example:
+        snvs@020cc000 {
+                compatible = "fsl,sec-v4.0-mon", "simple-bus";
+                #address-cells = <1>;
+                #size-cells = <1>;
+                ranges = <0 0x020cc000 0x4000>;
+                .....
+                snvs_poweroff: snvs-poweroff@38 {
+                        compatible = "fsl,sec-v4.0-poweroff";
+                        reg = <0x38 0x4>;
+                };
+        }
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index f65ff49bb275..028e76504519 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -71,6 +71,15 @@ config POWER_RESET_HISI
        help
          Reboot support for Hisilicon boards.
+config POWER_RESET_IMX
+        bool "IMX6 power-off driver"
+        depends on POWER_RESET && SOC_IMX6
+        help
+          This driver support power off external PMIC by PMIC_ON_REQ on i.mx6
+          boards.If you want to use other pin to control external power,please
+          say N here or disable in dts to make sure pm_power_off never be
+          overwrote wrongly by this driver.
 config POWER_RESET_MSM
        bool "Qualcomm MSM power-off driver"
        depends on ARCH_QCOM
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 76ce1c59469b..1d4804d6b323 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
 obj-$(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-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o
 obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
 obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
 obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c
new file mode 100644
index 000000000000..ad6ce5020ea7
--- /dev/null
+++ b/drivers/power/reset/imx-snvs-poweroff.c
@@ -0,0 +1,66 @@
+/* Power off driver for i.mx6
+ * Copyright (c) 2014, FREESCALE CORPORATION.  All rights reserved.
+ *
+ * based on msm-poweroff.c
+ *
+ * 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/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+static void __iomem *snvs_base;
+static void do_imx_poweroff(void)
+{
+        u32 value = readl(snvs_base);
+        /* set TOP and DP_EN bit */
+        writel(value | 0x60, snvs_base);
+}
+static int imx_poweroff_probe(struct platform_device *pdev)
+{
+        snvs_base = of_iomap(pdev->dev.of_node, 0);
+        if (!snvs_base) {
+                dev_err(&pdev->dev, "failed to get memory\n");
+                return -ENODEV;
+        }
+        pm_power_off = do_imx_poweroff;
+        return 0;
+}
+static const struct of_device_id of_imx_poweroff_match[] = {
+        { .compatible = "fsl,sec-v4.0-poweroff", },
+        {},
+};
+MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
+static struct platform_driver imx_poweroff_driver = {
+        .probe = imx_poweroff_probe,
+        .driver = {
+                .name = "imx-snvs-poweroff",
+                .of_match_table = of_match_ptr(of_imx_poweroff_match),
+        },
+};
+static int __init imx_poweroff_init(void)
+{
+        return platform_driver_register(&imx_poweroff_driver);
+}
+device_initcall(imx_poweroff_init);

diff --git a/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt new file mode 100644 index 000000000000..dc7c9bad63ea --- /dev/null +++ b/Documentation/devicetree/bindings/power_supply/imx-snvs-poweroff.txt
@@ -0,0 +1,23 @@
		1	i.mx6 Poweroff Driver
		2
		3	SNVS_LPCR in SNVS module can power off the whole system by pull
		4	PMIC_ON_REQ low if PMIC_ON_REQ is connected with external PMIC.
		5	If you don't want to use PMIC_ON_REQ as power on/off control,
		6	please set status='disabled' to disable this driver.
		7
		8	Required Properties:
		9	-compatible: "fsl,sec-v4.0-poweroff"
		10	-reg: Specifies the physical address of the SNVS_LPCR register
		11
		12	Example:
		13	snvs@020cc000 {
		14	compatible = "fsl,sec-v4.0-mon", "simple-bus";
		15	#address-cells = <1>;
		16	#size-cells = <1>;
		17	ranges = <0 0x020cc000 0x4000>;
		18	.....
		19	snvs_poweroff: snvs-poweroff@38 {
		20	compatible = "fsl,sec-v4.0-poweroff";
		21	reg = <0x38 0x4>;
		22	};
		23	}


diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index f65ff49bb275..028e76504519 100644 --- a/drivers/power/reset/Kconfig +++ b/drivers/power/reset/Kconfig
@@ -71,6 +71,15 @@ config POWER_RESET_HISI
71	help	71	help
72	Reboot support for Hisilicon boards.	72	Reboot support for Hisilicon boards.
73		73
		74	config POWER_RESET_IMX
		75	bool "IMX6 power-off driver"
		76	depends on POWER_RESET && SOC_IMX6
		77	help
		78	This driver support power off external PMIC by PMIC_ON_REQ on i.mx6
		79	boards.If you want to use other pin to control external power,please
		80	say N here or disable in dts to make sure pm_power_off never be
		81	overwrote wrongly by this driver.
		82
74	config POWER_RESET_MSM	83	config POWER_RESET_MSM
75	bool "Qualcomm MSM power-off driver"	84	bool "Qualcomm MSM power-off driver"
76	depends on ARCH_QCOM	85	depends on ARCH_QCOM


diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile index 76ce1c59469b..1d4804d6b323 100644 --- a/drivers/power/reset/Makefile +++ b/drivers/power/reset/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
6	obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o	6	obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
7	obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o	7	obj-$(CONFIG_POWER_RESET_GPIO_RESTART) += gpio-restart.o
8	obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o	8	obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
		9	obj-$(CONFIG_POWER_RESET_IMX) += imx-snvs-poweroff.o
9	obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o	10	obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
10	obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o	11	obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
11	obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o	12	obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o


diff --git a/drivers/power/reset/imx-snvs-poweroff.c b/drivers/power/reset/imx-snvs-poweroff.c new file mode 100644 index 000000000000..ad6ce5020ea7 --- /dev/null +++ b/drivers/power/reset/imx-snvs-poweroff.c
@@ -0,0 +1,66 @@
		1	/* Power off driver for i.mx6
		2	* Copyright (c) 2014, FREESCALE CORPORATION. All rights reserved.
		3	*
		4	* based on msm-poweroff.c
		5	*
		6	* This program is free software; you can redistribute it and/or modify
		7	* it under the terms of the GNU General Public License version 2 and
		8	* only version 2 as published by the Free Software Foundation.
		9	*
		10	* This program is distributed in the hope that it will be useful,
		11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		13	* GNU General Public License for more details.
		14	*
		15	*/
		16
		17	#include <linux/err.h>
		18	#include <linux/init.h>
		19	#include <linux/io.h>
		20	#include <linux/kernel.h>
		21	#include <linux/module.h>
		22	#include <linux/of.h>
		23	#include <linux/of_address.h>
		24	#include <linux/platform_device.h>
		25
		26	static void __iomem *snvs_base;
		27
		28	static void do_imx_poweroff(void)
		29	{
		30	u32 value = readl(snvs_base);
		31
		32	/* set TOP and DP_EN bit */
		33	writel(value \| 0x60, snvs_base);
		34	}
		35
		36	static int imx_poweroff_probe(struct platform_device *pdev)
		37	{
		38	snvs_base = of_iomap(pdev->dev.of_node, 0);
		39	if (!snvs_base) {
		40	dev_err(&pdev->dev, "failed to get memory\n");
		41	return -ENODEV;
		42	}
		43
		44	pm_power_off = do_imx_poweroff;
		45	return 0;
		46	}
		47
		48	static const struct of_device_id of_imx_poweroff_match[] = {
		49	{ .compatible = "fsl,sec-v4.0-poweroff", },
		50	{},
		51	};
		52	MODULE_DEVICE_TABLE(of, of_imx_poweroff_match);
		53
		54	static struct platform_driver imx_poweroff_driver = {
		55	.probe = imx_poweroff_probe,
		56	.driver = {
		57	.name = "imx-snvs-poweroff",
		58	.of_match_table = of_match_ptr(of_imx_poweroff_match),
		59	},
		60	};
		61
		62	static int __init imx_poweroff_init(void)
		63	{
		64	return platform_driver_register(&imx_poweroff_driver);
		65	}
		66	device_initcall(imx_poweroff_init);