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regulator: pwm-regulator: set init voltage before pwm enable

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Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Change-Id: I37c35eb97dd1e205a4966792acb4df2bb2bf69f1
This commit is contained in:
Elaine Zhang 2022-03-23 09:51:50 +08:00 committed by Tao Huang
parent 931258edcb
commit 00e0392c18
1 changed files with 15 additions and 0 deletions
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15
drivers/regulator/pwm-regulator.c
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@ -41,6 +41,9 @@ struct pwm_regulator_data {
/* Enable GPIO */
struct gpio_desc *enb_gpio;
/* Init voltage */
int init_uv;
};
struct pwm_voltages {
@ -48,6 +51,10 @@ struct pwm_voltages {
unsigned int dutycycle;
};
static int pwm_regulator_set_voltage(struct regulator_dev *rdev,
int req_min_uV, int req_max_uV,
unsigned int *selector);
/*
* Voltage table call-backs
*/
@ -116,6 +123,10 @@ static int pwm_regulator_enable(struct regulator_dev *dev)
{
struct pwm_regulator_data *drvdata = rdev_get_drvdata(dev);
if (drvdata->init_uv && !pwm_get_duty_cycle(drvdata->pwm))
pwm_regulator_set_voltage(dev, drvdata->init_uv,
drvdata->init_uv, NULL);
gpiod_set_value_cansleep(drvdata->enb_gpio, 1);
return pwm_enable(drvdata->pwm);
@ -322,6 +333,7 @@ static int pwm_regulator_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node;
enum gpiod_flags gpio_flags;
int ret;
u32 init_uv;
if (!np) {
dev_err(&pdev->dev, "Device Tree node missing\n");
@ -341,6 +353,9 @@ static int pwm_regulator_probe(struct platform_device *pdev)
if (ret)
return ret;
if (!of_property_read_u32(np, "regulator-init-microvolt", &init_uv))
drvdata->init_uv = init_uv;
init_data = of_get_regulator_init_data(&pdev->dev, np,
&drvdata->desc);
if (!init_data)