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

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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 Tao Huang
parent cea2a68180
commit 6e3ddcaf17
1 changed files with 47 additions and 4 deletions
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51
drivers/mfd/rk808.c
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@@ -1,7 +1,7 @@
/*
* MFD core driver for Rockchip RK808
*
* 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>
@@ -24,6 +24,7 @@
#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>
@@ -1029,11 +1030,44 @@ static int rk817_pinctrl_init(struct device *dev, struct rk808 *rk808)
return 0;
}
static void rk817_of_property_prepare(struct regmap *regmap, struct device *dev)
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;
if (action != SYS_RESTART)
return NOTIFY_OK;
if (!cmd || !strlen(cmd) || !strcmp(cmd, "normal"))
return NOTIFY_OK;
data = container_of(nb, struct rk817_reboot_data_t, reboot_notifier);
dev = &data->rk808->i2c->dev;
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;
int ret, func, msk, val;
struct device_node *np = dev->of_node;
struct regmap *regmap = rk808->regmap;
ret = of_property_read_u32_index(np, "fb-inner-reg-idxs", 0, &inner);
if (!ret && inner == RK817_ID_DCDC3)
@@ -1061,6 +1095,15 @@ static void rk817_of_property_prepare(struct regmap *regmap, struct device *dev)
regmap_update_bits(regmap, RK817_SYS_CFG(3), msk, val);
dev_info(dev, "support pmic reset mode:%d,%d\n", ret, func);
if (val & RK817_RST_FUNC_REG)
return;
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;
@@ -1095,7 +1138,7 @@ static int rk808_probe(struct i2c_client *client,
int ret, i, pm_off = 0;
unsigned int on, off;
u8 pmic_id_msb = RK808_ID_MSB, pmic_id_lsb = RK808_ID_LSB;
void (*of_property_prepare_fn)(struct regmap *regmap,
void (*of_property_prepare_fn)(struct rk808 *rk808,
struct device *dev) = NULL;
int (*pinctrl_init)(struct device *dev, struct rk808 *rk808) = NULL;
@@ -1246,7 +1289,7 @@ static int rk808_probe(struct i2c_client *client,
}
if (of_property_prepare_fn)
of_property_prepare_fn(rk808->regmap, &client->dev);
of_property_prepare_fn(rk808, &client->dev);
i2c_set_clientdata(client, rk808);
rk808->i2c = client;