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author | Robin Gong <b38343@freescale.com> | 2014-09-26 11:59:06 +0800 |
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committer | Sebastian Reichel <sre@kernel.org> | 2014-11-17 03:07:08 +0100 |
commit | b8e64eea41ea71b58e61e35ee347464efd60ca21 (patch) | |
tree | d474d8bae60f0fb49771631817f42cd794d69d7e /drivers | |
parent | c8dd9cce4f3fedf5e333bb8623cb7da6d7e3ea91 (diff) | |
download | op-kernel-dev-b8e64eea41ea71b58e61e35ee347464efd60ca21.zip op-kernel-dev-b8e64eea41ea71b58e61e35ee347464efd60ca21.tar.gz |
power: reset: imx-snvs-poweroff: add power off driver for i.mx6
This driver register pm_power_off with snvs power off function. If
your boards NOT use PMIC_ON_REQ to turn on/off external pmic, or use
other pin to do, please disable the driver in dts, otherwise, your
pm_power_off maybe overwrote by this driver.
Signed-off-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/power/reset/Kconfig | 9 | ||||
-rw-r--r-- | drivers/power/reset/Makefile | 1 | ||||
-rw-r--r-- | drivers/power/reset/imx-snvs-poweroff.c | 66 |
3 files changed, 76 insertions, 0 deletions
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig index f65ff49..028e765 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 76ce1c5..1d4804d 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 0000000..ad6ce50 --- /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); |