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regulator: rohm-regulator: add helper for restricted voltage setting

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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>
This commit is contained in:
Matti Vaittinen 2021-11-18 13:48:47 +02:00 committed by Mark Brown
parent 4950486cd8
commit 8b6e885559
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 23 additions and 0 deletions
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16
drivers/regulator/rohm-regulator.c
View file

@ -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");

7
include/linux/mfd/rohm-generic.h
View file

@ -80,6 +80,8 @@ int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
const struct regulator_desc *desc,
struct regmap *regmap);
int rohm_regulator_set_voltage_sel_restricted(struct regulator_dev *rdev,
unsigned int sel);
#else
static inline int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dvs,
struct device_node *np,
@ -88,6 +90,11 @@ static inline int rohm_regulator_set_dvs_levels(const struct rohm_dvs_config *dv
{
return 0;
}
static int rohm_regulator_set_voltage_sel_restricted(struct regulator_dev *rdev,
unsigned int sel)
{
return 0;
}
#endif
#endif