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regulator: Don't error out fixed regulator in regulator_sync_voltage()

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Fixed regulator can't change voltage and regulator_sync_voltage()
returns -EINVAL in this case. Make regulator_sync_voltage() to succeed
for regulators that are incapable to change voltage.

On NVIDIA Tegra power management driver needs to sync voltage and we have
one device (Trimslice) that uses fixed regulator which is getting synced.
The syncing error isn't treated as fatal, but produces a noisy error
message. This patch silences that error.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20211021183308.27786-1-digetx@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Dmitry Osipenko 2021-10-21 21:33:08 +03:00 committed by Mark Brown
parent 3253e24bc2
commit 400d5a5da4
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1 changed files with 3 additions and 0 deletions
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3
drivers/regulator/core.c
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@ -4249,6 +4249,9 @@ int regulator_sync_voltage(struct regulator *regulator)
struct regulator_voltage *voltage = &regulator->voltage[PM_SUSPEND_ON];
int ret, min_uV, max_uV;
if (!regulator_ops_is_valid(rdev, REGULATOR_CHANGE_VOLTAGE))
return 0;
regulator_lock(rdev);
if (!rdev->desc->ops->set_voltage &&