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| author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2024-01-14 01:46:26 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 15:34:50 +0300 |
| commit | e1b38b919d3d5792031c6682b5a7c7b95c6bacf4 (patch) | |
| tree | 69facea8481f676d791c35a7d1178ca49445d74e /drivers/regulator | |
| parent | 68da1d65b2e3b9a7c7cd8d2b87583afa7a7a82eb (diff) | |
| download | linux-e1b38b919d3d5792031c6682b5a7c7b95c6bacf4.tar.xz | |
regulator: pwm-regulator: Add validity checks in continuous .get_voltage
[ Upstream commit c92688cac239794e4a1d976afa5203a4d3a2ac0e ]
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>
Signed-off-by: Sasha Levin <sashal@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 2aff6db748e2..e33d10df7a76 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. |