From: Boris Brezillon Date: Tue, 14 Jun 2016 09:13:20 +0000 (+0200) Subject: regulator: pwm: Retrieve correct voltage X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=d9070fdbe40a04b61262bac0f7ff0c7c29a68015;p=linux-beck.git regulator: pwm: Retrieve correct voltage The continuous PWM voltage regulator is caching the voltage value in the ->volt_uV field. While most of the time this value should reflect the real voltage, sometime it can be sightly different if the PWM device rounded the set_duty_cycle request. Moreover, this value is not valid until someone has modified the regulator output. Remove the ->volt_uV field and always rely on the PWM state to calculate the regulator output. Signed-off-by: Boris Brezillon Reviewed-by: Brian Norris Tested-by: Brian Norris Tested-by: Heiko Stuebner Acked-by: Mark Brown Signed-off-by: Thierry Reding --- diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 7d26d3b0eed6..ae0bebbfda9d 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -37,9 +37,6 @@ struct pwm_regulator_data { int state; - /* Continuous voltage */ - int volt_uV; - /* Enable GPIO */ struct gpio_desc *enb_gpio; }; @@ -148,8 +145,13 @@ static int pwm_regulator_is_enabled(struct regulator_dev *dev) static int pwm_regulator_get_voltage(struct regulator_dev *rdev) { struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev); + int min_uV = rdev->constraints->min_uV; + int diff = rdev->constraints->max_uV - min_uV; + struct pwm_state pstate; - return drvdata->volt_uV; + pwm_get_state(drvdata->pwm, &pstate); + + return min_uV + pwm_get_relative_duty_cycle(&pstate, diff); } static int pwm_regulator_set_voltage(struct regulator_dev *rdev, @@ -176,8 +178,6 @@ static int pwm_regulator_set_voltage(struct regulator_dev *rdev, return ret; } - drvdata->volt_uV = min_uV; - if ((ramp_delay == 0) || !pwm_regulator_is_enabled(rdev)) return 0;