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| author | Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com> | 2021-11-18 13:48:47 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-11-18 13:57:47 +0000 |
| commit | 8b6e88555971eac384b89fb0bd6c72ee4e1e6a6a (patch) | |
| tree | fc1aade4d476db68db645d98c8bc252f25abdfa7 /drivers/regulator | |
| parent | 4950486cd86f450baa847bfc13557244d834526c (diff) | |
| download | lwn-8b6e88555971eac384b89fb0bd6c72ee4e1e6a6a.tar.gz lwn-8b6e88555971eac384b89fb0bd6c72ee4e1e6a6a.zip | |
regulator: rohm-regulator: add helper for restricted voltage setting
Few ROHM PMICs have regulators where voltage setting can be done only
when regulator is disabled. Add helper for those PMICs.
Signed-off-by: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Link: https://lore.kernel.org/r/6f51871e9fea611d133b5dd2560f4a7ee1ede9cd.1637233864.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/regulator')
| -rw-r--r-- | drivers/regulator/rohm-regulator.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/regulator/rohm-regulator.c b/drivers/regulator/rohm-regulator.c index 6e0d9c08ec1c..f97a9a51ee76 100644 --- a/drivers/regulator/rohm-regulator.c +++ b/drivers/regulator/rohm-regulator.c @@ -112,6 +112,22 @@ int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs, } EXPORT_SYMBOL(rohm_regulator_set_dvs_levels); +/* + * Few ROHM PMIC ICs have constrains on voltage changing: + * BD71837 - only buck 1-4 voltages can be changed when they are enabled. + * Other bucks and all LDOs must be disabled when voltage is changed. + * BD96801 - LDO voltage levels can be changed when LDOs are disabled. + */ +int rohm_regulator_set_voltage_sel_restricted(struct regulator_dev *rdev, + unsigned int sel) +{ + if (rdev->desc->ops->is_enabled(rdev)) + return -EBUSY; + + return regulator_set_voltage_sel_regmap(rdev, sel); +} +EXPORT_SYMBOL_GPL(rohm_regulator_set_voltage_sel_restricted); + MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>"); MODULE_DESCRIPTION("Generic helpers for ROHM PMIC regulator drivers"); |