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mfd: rk808: add suspend and resume register setting for rk805

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Because Buck3 don't have sleep state register, so we need a manual
switch: set BUCK3 suspend as Auto PWM mode and resume as FPWM mode.

This is for power saving in system suspend.

Change-Id: I67db458e650b6e85ed4267f0b0dcdb01dff4c635
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
This commit is contained in:
Joseph Chen 2017-08-14 17:54:06 +08:00 committed by Huang, Tao
parent 68f8d696e6
commit 208ce417cb
2 changed files with 62 additions and 0 deletions
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60
drivers/mfd/rk808.c
View File

@ -546,9 +546,19 @@ static const struct rk808_reg_data rk805_pre_init_reg[] = {
{RK805_THERMAL_REG, TEMP_HOTDIE_MSK, TEMP115C},
};
static struct rk808_reg_data rk805_suspend_reg[] = {
{RK805_BUCK3_CONFIG_REG, PWM_MODE_MSK, AUTO_PWM_MODE},
};
static struct rk808_reg_data rk805_resume_reg[] = {
{RK805_BUCK3_CONFIG_REG, PWM_MODE_MSK, FPWM_MODE},
};
static int (*pm_shutdown)(struct regmap *regmap);
static int (*pm_shutdown_prepare)(struct regmap *regmap);
static struct i2c_client *rk808_i2c_client;
static struct rk808_reg_data *suspend_reg, *resume_reg;
static int suspend_reg_num, resume_reg_num;
static void rk808_device_shutdown_prepare(void)
{
@ -738,6 +748,10 @@ static int rk808_probe(struct i2c_client *client,
pm_shutdown_prepare_fn = rk805_shutdown_prepare;
on_source = RK805_ON_SOURCE_REG;
off_source = RK805_OFF_SOURCE_REG;
suspend_reg = rk805_suspend_reg;
suspend_reg_num = ARRAY_SIZE(rk805_suspend_reg);
resume_reg = rk805_resume_reg;
resume_reg_num = ARRAY_SIZE(rk805_resume_reg);
break;
default:
dev_err(&client->dev, "unsupported RK8XX ID 0x%lx\n",
@ -829,6 +843,46 @@ static int rk808_probe(struct i2c_client *client,
return ret;
}
static int rk808_suspend(struct device *dev)
{
int i, ret;
struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
for (i = 0; i < suspend_reg_num; i++) {
ret = regmap_update_bits(rk808->regmap,
suspend_reg[i].addr,
suspend_reg[i].mask,
suspend_reg[i].value);
if (ret) {
dev_err(dev, "0x%x write err\n",
suspend_reg[i].addr);
return ret;
}
}
return 0;
}
static int rk808_resume(struct device *dev)
{
int i, ret;
struct rk808 *rk808 = i2c_get_clientdata(rk808_i2c_client);
for (i = 0; i < resume_reg_num; i++) {
ret = regmap_update_bits(rk808->regmap,
resume_reg[i].addr,
resume_reg[i].mask,
resume_reg[i].value);
if (ret) {
dev_err(dev, "0x%x write err\n",
resume_reg[i].addr);
return ret;
}
}
return 0;
}
static int rk808_remove(struct i2c_client *client)
{
struct rk808 *rk808 = i2c_get_clientdata(client);
@ -843,6 +897,11 @@ static int rk808_remove(struct i2c_client *client)
return 0;
}
static const struct dev_pm_ops rk808_pm_ops = {
.suspend = rk808_suspend,
.resume = rk808_resume,
};
static const struct i2c_device_id rk808_ids[] = {
{ "rk805" },
{ "rk808" },
@ -856,6 +915,7 @@ static struct i2c_driver rk808_i2c_driver = {
.driver = {
.name = "rk808",
.of_match_table = rk808_of_match,
.pm = &rk808_pm_ops,
},
.probe = rk808_probe,
.remove = rk808_remove,

2
include/linux/mfd/rk808.h
View File

@ -690,7 +690,9 @@ enum rk805_reg {
#define SHUTDOWN_FUN (0x2 << 2)
#define SLEEP_FUN (0x1 << 2)
#define RK8XX_ID_MSK 0xfff0
#define PWM_MODE_MSK BIT(7)
#define FPWM_MODE BIT(7)
#define AUTO_PWM_MODE 0
enum {
BUCK_ILMIN_50MA,