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regulator: wl2868c: add suspend/resume functions

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If wl2868c power off in suspend, then the registers
will be reset, so we need to restored them after resume.

Signed-off-by: Chen Shunqing <csq@rock-chips.com>
Change-Id: Id7170a27f18fd9a640df358e0b13244036121d9f
This commit is contained in:
Chen Shunqing
2022-07-28 01:24:23 +00:00
committed by Tao Huang
parent f7645e0726
commit f710bf284e
1 changed files with 45 additions and 6 deletions
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51
drivers/regulator/wl2868c-regulator.c
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@@ -75,6 +75,8 @@ struct wl2868c {
struct regulator_dev *rdev;
struct gpio_desc *reset_gpio;
int min_dropout_uv;
int ldo_vout[7];
int ldo_en;
};
static const struct regulator_ops wl2868c_reg_ops = {
@@ -183,6 +185,16 @@ static const struct regmap_config wl2868c_regmap_config = {
.volatile_table = &wl2868c_volatile_table,
};
static void wl2868c_reset(struct wl2868c *wl2868c)
{
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(wl2868c->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
usleep_range(10000, 11000);
}
static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
@@ -203,12 +215,7 @@ static int wl2868c_i2c_probe(struct i2c_client *client, const struct i2c_device_
return ret;
}
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(wl2868c->reset_gpio, 1);
usleep_range(10000, 11000);
gpiod_set_value_cansleep(wl2868c->reset_gpio, 0);
usleep_range(10000, 11000);
wl2868c_reset(wl2868c);
i2c_set_clientdata(client, wl2868c);
wl2868c->dev = dev;
@@ -244,6 +251,37 @@ static void wl2868c_regulator_shutdown(struct i2c_client *client)
regmap_write(wl2868c->regmap, WL2868C_LDO_EN, 0x80);
}
static int __maybe_unused wl2868c_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct wl2868c *wl2868c = i2c_get_clientdata(client);
int i;
regmap_read(wl2868c->regmap, WL2868C_LDO_EN, &wl2868c->ldo_en);
for (i = 0; i < ARRAY_SIZE(wl2868c->ldo_vout); i++)
regmap_read(wl2868c->regmap, WL2868C_LDO1_VOUT + i,
&wl2868c->ldo_vout[i]);
return 0;
}
static int __maybe_unused wl2868c_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct wl2868c *wl2868c = i2c_get_clientdata(client);
int i;
wl2868c_reset(wl2868c);
for (i = 0; i < ARRAY_SIZE(wl2868c->ldo_vout); i++)
regmap_write(wl2868c->regmap, WL2868C_LDO1_VOUT + i,
wl2868c->ldo_vout[i]);
regmap_write(wl2868c->regmap, WL2868C_LDO_EN, wl2868c->ldo_en);
return 0;
}
static SIMPLE_DEV_PM_OPS(wl2868c_pm_ops, wl2868c_suspend, wl2868c_resume);
static const struct i2c_device_id wl2868c_i2c_id[] = {
{ "wl2868c", 0 },
{ }
@@ -261,6 +299,7 @@ static struct i2c_driver wl2868c_i2c_driver = {
.driver = {
.name = "wl2868c",
.of_match_table = of_match_ptr(wl2868c_of_match),
.pm = &wl2868c_pm_ops,
},
.id_table = wl2868c_i2c_id,
.probe = wl2868c_i2c_probe,