diff options
author | Martin Blumenstingl <martin.blumenstingl@googlemail.com> | 2024-01-14 01:46:26 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-03-01 15:26:26 +0300 |
commit | 13c1af5f3bc4c1959f492fbb846aee30aa1fca28 (patch) | |
tree | 37a17d4eb36de1c746deba4e5d6f2c1071085396 /drivers/regulator | |
parent | 9d508c897153ae8dd79303f7f035f078139f6b49 (diff) | |
download | linux-13c1af5f3bc4c1959f492fbb846aee30aa1fca28.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 b9eeaff1c661..925e486f73a6 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. |