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authorMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>2021-11-18 13:48:47 +0200
committerMark Brown <broonie@kernel.org>2021-11-18 13:57:47 +0000
commit8b6e88555971eac384b89fb0bd6c72ee4e1e6a6a (patch)
treefc1aade4d476db68db645d98c8bc252f25abdfa7 /drivers/regulator
parent4950486cd86f450baa847bfc13557244d834526c (diff)
downloadlinux-8b6e88555971eac384b89fb0bd6c72ee4e1e6a6a.tar.bz2
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.c16
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");