From: Martin Blumenstingl martin.blumenstingl@googlemail.com
[ Upstream commit 6a7d11efd6915d80a025f2a0be4ae09d797b91ec ]
If a PWM output is disabled then it's voltage has to be calculated based on a zero duty cycle (for normal polarity) or duty cycle being equal to the PWM period (for inverted polarity). Add support for this to pwm_regulator_get_voltage().
Signed-off-by: Martin Blumenstingl martin.blumenstingl@googlemail.com Link: https://msgid.link/r/20240113224628.377993-3-martin.blumenstingl@googlemail.... Signed-off-by: Mark Brown broonie@kernel.org Signed-off-by: Chukun Pan amadeus@jmu.edu.cn --- drivers/regulator/pwm-regulator.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 226ca4c62673..d27b9a7a30c9 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -157,6 +157,13 @@ static int pwm_regulator_get_voltage(struct regulator_dev *rdev)
pwm_get_state(drvdata->pwm, &pstate);
+ if (!pstate.enabled) { + if (pstate.polarity == PWM_POLARITY_INVERSED) + pstate.duty_cycle = pstate.period; + else + pstate.duty_cycle = 0; + } + voltage = pwm_get_relative_duty_cycle(&pstate, duty_unit); if (voltage < min(max_uV_duty, min_uV_duty) || voltage > max(max_uV_duty, min_uV_duty))