regulator: Make regulator_sync_voltage() usable by coupled regulators

Make regulator_sync_voltage() to re-balance voltage state of a coupled
regulators instead of changing the voltage directly.

Tested-by: Peter Geis <pgwipeout@gmail.com> # Ouya T30
Tested-by: Dmitry Osipenko <digetx@gmail.com> # A500 T20 and Nexus7 T30
Tested-by: Nicolas Chauvet <kwizart@gmail.com> # PAZ00 T20
Tested-by: Matt Merhar <mattmerhar@protonmail.com> # Ouya T30
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20210122174311.28230-1-digetx@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index fee9241..1a4745e 100644 (file)
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -4131,7 +4131,11 @@ int regulator_sync_voltage(struct regulator *regulator)
        if (ret < 0)
                goto out;
 
-       ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
+       /* balance only, if regulator is coupled */
+       if (rdev->coupling_desc.n_coupled > 1)
+               ret = regulator_balance_voltage(rdev, PM_SUSPEND_ON);
+       else
+               ret = _regulator_do_set_voltage(rdev, min_uV, max_uV);
 
 out:
        regulator_unlock(rdev);