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regulator: core: Fix off-on-delay-us for always-on/boot-on regulators

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[ Upstream commit 218320fec29430438016f88dd4fbebfa1b95ad8d ]

Regulators marked with "regulator-always-on" or "regulator-boot-on"
as well as an "off-on-delay-us", may run into cycling issues that are
hard to detect.

This is caused by the "last_off" state not being initialized in this
case.

Fix the "last_off" initialization by setting it to the current kernel
time upon initialization, regardless of always_on/boot_on state.

Signed-off-by: Christian Kohlschütter <christian@kohlschutter.com>
Link: https://lore.kernel.org/r/FAFD5B39-E9C4-47C7-ACF1-2A04CD59758D@kohlschutter.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Stable-dep-of: 80d2c29e09e6 ("regulator: core: Use ktime_get_boottime() to determine how long a regulator was off")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Christian Kohlschütter 2022-07-19 16:02:00 +02:00 committed by Greg Kroah-Hartman
parent 67a791df14
commit e1a078cac3
1 changed files with 3 additions and 2 deletions
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5
drivers/regulator/core.c
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@ -1539,6 +1539,9 @@ static int set_machine_constraints(struct regulator_dev *rdev)
rdev->constraints->always_on = true;
}
if (rdev->desc->off_on_delay)
rdev->last_off = ktime_get();
/* If the constraints say the regulator should be on at this point
* and we have control then make sure it is enabled.
*/
@ -1572,8 +1575,6 @@ static int set_machine_constraints(struct regulator_dev *rdev)
if (rdev->constraints->always_on)
rdev->use_count++;
} else if (rdev->desc->off_on_delay) {
rdev->last_off = ktime_get();
}
print_constraints(rdev);