mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-07 11:28:32 +00:00
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>
This commit is contained in:
parent
c8dd9cce4f
commit
b8e64eea41
4 changed files with 99 additions and 0 deletions
|
@ -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>;
|
||||
};
|
||||
}
|
|
@ -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
|
||||
|
|
|
@ -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
|
||||
|
|
66
drivers/power/reset/imx-snvs-poweroff.c
Normal file
66
drivers/power/reset/imx-snvs-poweroff.c
Normal file
|
@ -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);
|
Loading…
Reference in a new issue