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| author | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2021-05-20 01:12:23 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-05-20 22:00:11 +0100 |
| commit | 98e48cd9283dbac0e1445ee780889f10b3d1db6a (patch) | |
| tree | 22e798561c4f6b618a6cb86db7f5c46d701b8827 /drivers/regulator/core.c | |
| parent | 855bfff9d623e7aff6556bfb6831d324dec8d96a (diff) | |
| download | linux-98e48cd9283dbac0e1445ee780889f10b3d1db6a.tar.gz linux-98e48cd9283dbac0e1445ee780889f10b3d1db6a.tar.bz2 linux-98e48cd9283dbac0e1445ee780889f10b3d1db6a.zip | |
regulator: core: resolve supply for boot-on/always-on regulators
For the boot-on/always-on regulators the set_machine_constrainst() is
called before resolving rdev->supply. Thus the code would try to enable
rdev before enabling supplying regulator. Enforce resolving supply
regulator before enabling rdev.
Fixes: aea6cb99703e ("regulator: resolve supply after creating regulator")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20210519221224.2868496-1-dmitry.baryshkov@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator/core.c')
| -rw-r--r-- | drivers/regulator/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c index f192bf19492e..e20e77e4c159 100644 --- a/drivers/regulator/core.c +++ b/drivers/regulator/core.c @@ -1425,6 +1425,12 @@ static int set_machine_constraints(struct regulator_dev *rdev) * and we have control then make sure it is enabled. */ if (rdev->constraints->always_on || rdev->constraints->boot_on) { + /* If we want to enable this regulator, make sure that we know + * the supplying regulator. + */ + if (rdev->supply_name && !rdev->supply) + return -EPROBE_DEFER; + if (rdev->supply) { ret = regulator_enable(rdev->supply); if (ret < 0) { |