diff options
| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2024-01-13 23:46:26 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-01-22 15:31:22 +0000 |
| commit | c92688cac239794e4a1d976afa5203a4d3a2ac0e (patch) | |
| tree | 30a12a901f022538ca27c0b303fd9ee56f5dee6b /drivers/regulator | |
| parent | 6613476e225e090cc9aad49be7fa504e290dd33d (diff) | |
regulator: pwm-regulator: Add validity checks in continuous .get_voltage
Continuous regulators can be configured to operate only in a certain
duty cycle range (for example from 0..91%). Add a check to error out if
the duty cycle translates to an unsupported (or out of range) voltage.
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Link: https://msgid.link/r/20240113224628.377993-2-martin.blumenstingl@googlemail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/pwm-regulator.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 698c420e0869..226ca4c62673 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -158,6 +158,9 @@ static int pwm_regulator_get_voltage(struct regulator_dev *rdev) pwm_get_state(drvdata->pwm, &pstate); 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)) + return -ENOTRECOVERABLE; /* * The dutycycle for min_uV might be greater than the one for max_uV. |