[PATCH v2 2/3] power: reset: imx-snvs-poweroff: add power off driver for i.mx6
From: Robin Gong <hidden>
Date: 2014-09-12 09:53:59
Also in:
linux-arm-kernel, linux-pm, lkml
Subsystem:
system reset/shutdown drivers, the rest · Maintainers:
Sebastian Reichel, Linus Torvalds
Add simple power off driver for i.mx6. Signed-off-by: Robin Gong <redacted> --- drivers/power/reset/Kconfig | 6 +++ drivers/power/reset/Makefile | 1 + drivers/power/reset/imx-snvs-poweroff.c | 69 +++++++++++++++++++++++++++++++++ 3 files changed, 76 insertions(+) create mode 100644 drivers/power/reset/imx-snvs-poweroff.c
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index ca41523..c48d9ba 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig@@ -45,6 +45,12 @@ 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 + Power off support for i.mx6 boards. + config POWER_RESET_MSM bool "Qualcomm MSM power-off driver" depends on POWER_RESET && ARCH_QCOM
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index a42e70e..2524daf 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile@@ -3,6 +3,7 @@ obj-$(CONFIG_POWER_RESET_AXXIA) += axxia-reset.o obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o obj-$(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-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o obj-$(CONFIG_POWER_RESET_RESTART) += restart-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 0000000..55603ba
--- /dev/null
+++ b/drivers/power/reset/imx-snvs-poweroff.c@@ -0,0 +1,69 @@ +/* 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/delay.h> +#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> + +#include <asm/system_misc.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 -EIO; + } + + 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);
--
1.9.1