shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 11:26:02 +09:00
Code Issues Packages Projects Releases Wiki Activity

mfd: rk808: Set only resetting pmic register for 817&809.

Browse Source 
If the system needs hold register values when system will reboot.
need to set only resetting pmic register for 817&809 forcedly.

Change-Id: Ib4b850c86ec3079cd7e374bc96460ee1532854a2
Signed-off-by: Tony Xie <tony.xie@rock-chips.com>
This commit is contained in:
Tony Xie
2018-04-17 15:27:32 +08:00
committed by Elaine Zhang
parent cfe40315e8
commit c0570888f0
2 changed files with 58 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/mfd/rk808.c
View File

@@ -1,7 +1,7 @@
/*
* MFD core driver for Rockchip RK808/RK818
*
* Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
* Copyright (c) 2014-2018, Fuzhou Rockchip Electronics Co., Ltd
*
* Author: Chris Zhong <zyw@rock-chips.com>
* Author: Zhang Qing <zhangqing@rock-chips.com>
@@ -26,6 +26,7 @@
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/reboot.h>
#include <linux/regmap.h>
#include <linux/syscore_ops.h>
#include <linux/pinctrl/consumer.h>
@@ -1032,6 +1033,52 @@ static int rk817_pinctrl_init(struct device *dev, struct rk808 *rk808)
return 0;
}
struct rk817_reboot_data_t {
struct rk808 *rk808;
struct notifier_block reboot_notifier;
};
static struct rk817_reboot_data_t rk817_reboot_data;
static int rk817_reboot_notifier_handler(struct notifier_block *nb,
unsigned long action, void *cmd)
{
struct rk817_reboot_data_t *data;
int ret;
struct device *dev;
int value, power_en_active0, power_en_active1;
data = container_of(nb, struct rk817_reboot_data_t, reboot_notifier);
dev = &data->rk808->i2c->dev;
regmap_read(data->rk808->regmap, RK817_POWER_EN_SAVE0,
&power_en_active0);
regmap_read(data->rk808->regmap, RK817_POWER_EN_SAVE1,
&power_en_active1);
value = power_en_active0 & 0x0f;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(0), value | 0xf0);
value = (power_en_active0 & 0xf0) >> 4;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(1), value | 0xf0);
value = power_en_active1 & 0x0f;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(2), value | 0xf0);
value = (power_en_active1 & 0xf0) >> 4;
regmap_write(data->rk808->regmap, RK817_POWER_EN_REG(3), value | 0xf0);
if (action != SYS_RESTART)
return NOTIFY_OK;
if (!cmd || !strlen(cmd) || !strcmp(cmd, "normal"))
return NOTIFY_OK;
ret = regmap_update_bits(data->rk808->regmap, RK817_SYS_CFG(3),
RK817_RST_FUNC_MSK, RK817_RST_FUNC_REG);
if (ret)
dev_err(dev, "reboot: force RK817_RST_FUNC_REG error!\n");
else
dev_info(dev, "reboot: force RK817_RST_FUNC_REG ok!\n");
return NOTIFY_OK;
}
static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
{
u32 inner;
@@ -1064,6 +1111,13 @@ static void rk817_of_property_prepare(struct rk808 *rk808, struct device *dev)
regmap_update_bits(rk808->regmap, RK817_SYS_CFG(3), msk, val);
dev_info(dev, "support pmic reset mode:%d,%d\n", ret, func);
rk817_reboot_data.rk808 = rk808;
rk817_reboot_data.reboot_notifier.notifier_call =
rk817_reboot_notifier_handler;
ret = register_reboot_notifier(&rk817_reboot_data.reboot_notifier);
if (ret)
dev_err(dev, "failed to register reboot nb\n");
}
static struct kobject *rk8xx_kobj;

3
include/linux/mfd/rk808.h
View File

@@ -704,6 +704,9 @@ enum rk809_reg_id {
#define RK817_RTC_COMP_LSB_REG 0x10
#define RK817_RTC_COMP_MSB_REG 0x11
#define RK817_POWER_EN_SAVE0 0x99
#define RK817_POWER_EN_SAVE1 0xa4
#define RK817_POWER_EN_REG(i) (0xb1 + (i))
#define RK817_POWER_SLP_EN_REG(i) (0xb5 + (i))