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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 ddc1c24c52
commit 6cb849faac
1 changed files with 16 additions and 1 deletions
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17
drivers/regulator/pwm-regulator.c
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@ -47,6 +47,9 @@ struct pwm_regulator_data {
/* Enable GPIO */ /* Enable GPIO */
struct gpio_desc *enb_gpio; struct gpio_desc *enb_gpio;
/* Init voltage */
int init_uv;
}; };
struct pwm_voltages { struct pwm_voltages {
@ -54,7 +57,11 @@ struct pwm_voltages {
unsigned int dutycycle; 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 * Voltage table call-backs
*/ */
static void pwm_regulator_init_state(struct regulator_dev *rdev) static void pwm_regulator_init_state(struct regulator_dev *rdev)
@ -122,6 +129,10 @@ static int pwm_regulator_enable(struct regulator_dev *dev)
{ {
struct pwm_regulator_data *drvdata = rdev_get_drvdata(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); gpiod_set_value_cansleep(drvdata->enb_gpio, 1);
return pwm_enable(drvdata->pwm); return pwm_enable(drvdata->pwm);
@ -332,6 +343,7 @@ static int pwm_regulator_probe(struct platform_device *pdev)
struct device_node *np = pdev->dev.of_node; struct device_node *np = pdev->dev.of_node;
enum gpiod_flags gpio_flags; enum gpiod_flags gpio_flags;
int ret; int ret;
u32 init_uv;
if (!np) { if (!np) {
dev_err(&pdev->dev, "Device Tree node missing\n"); dev_err(&pdev->dev, "Device Tree node missing\n");
@ -351,6 +363,9 @@ static int pwm_regulator_probe(struct platform_device *pdev)
if (ret) if (ret)
return 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, init_data = of_get_regulator_init_data(&pdev->dev, np,
&drvdata->desc); &drvdata->desc);
if (!init_data) if (!init_data)