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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 <[email protected]>
Link: https://lore.kernel.org/r/6f51871e9fea611d133b5dd2560f4a7ee1ede9cd.1637233864.git.matti.vaittinen@fi.rohmeurope.com
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Matti Vaittinen authored and Mark Brown committed 2021-11-18 13:57:47 +00:00
1 parent 4950486cd8
commit 8b6e885559
2 files changed
+23
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drivers/regulator/rohm-regulator.c
+16
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 <[email protected]>");
MODULE_DESCRIPTION("Generic helpers for ROHM PMIC regulator drivers");
include/linux/mfd/rohm-generic.h
+7
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