regulator: pwm-regulator: Small clean-ups

Remove over-bracketing, use framework API to fetch PWM period and
be more forthcoming that pwm_voltage_to_duty_cycle() actually returns
duty cycle as a percentage, rather than a register value.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index d92e667..936e387 100644 (file)
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -92,13 +92,13 @@ static int pwm_regulator_list_voltage(struct regulator_dev *rdev,
 /**
  * Continuous voltage call-backs
  */
-static int pwm_voltage_to_duty_cycle(struct regulator_dev *rdev, int req_uV)
+static int pwm_voltage_to_duty_cycle_percentage(struct regulator_dev *rdev, int req_uV)
 {
        int min_uV = rdev->constraints->min_uV;
        int max_uV = rdev->constraints->max_uV;
        int diff = max_uV - min_uV;
 
-       return 100 - ((((req_uV * 100) - (min_uV * 100)) / diff));
+       return 100 - (((req_uV * 100) - (min_uV * 100)) / diff);
 }
 
 static int pwm_regulator_get_voltage(struct regulator_dev *rdev)
@@ -114,14 +114,13 @@ static int pwm_regulator_set_voltage(struct regulator_dev *rdev,
 {
        struct pwm_regulator_data *drvdata = rdev_get_drvdata(rdev);
        unsigned int ramp_delay = rdev->constraints->ramp_delay;
+       unsigned int period = pwm_get_period(drvdata->pwm);
        int duty_cycle;
        int ret;
 
-       duty_cycle = pwm_voltage_to_duty_cycle(rdev, min_uV);
+       duty_cycle = pwm_voltage_to_duty_cycle_percentage(rdev, min_uV);
 
-       ret = pwm_config(drvdata->pwm,
-                        (drvdata->pwm->period / 100) * duty_cycle,
-                        drvdata->pwm->period);
+       ret = pwm_config(drvdata->pwm, (period / 100) * duty_cycle, period);
        if (ret) {
                dev_err(&rdev->dev, "Failed to configure PWM\n");
                return ret;