[PATCH 7/9] regulator: mt6358: Add output voltage fine tuning to fixed regulators

Chen-Yu Tsai
2023-06-09T08:31:21Z

The "fixed" LDO regulators found on the MT6358 and MT6366 PMICs have
either no voltage selection register, or only one valid setting.
However these do have a fine voltage calibration setting that can
slightly boost the output voltage from 0 mV to 100 mV, in 10 mV
increments.

Add support for this by changing these into linear range regulators.

Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
drivers/regulator/mt6358-regulator.c | 15 +++++++++++++--
1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/regulator/mt6358-regulator.c b/drivers/regulator/mt6358-regulator.c
index 31a16fb28ecd..26060909cf90 100644
--- a/drivers/regulator/mt6358-regulator.c
+++ b/drivers/regulator/mt6358-regulator.c
@@ -123,10 +123,13 @@ struct mt6358_regulator_info {
.type = REGULATOR_VOLTAGE, \
.id = MT6358_ID_##vreg, \
.owner = THIS_MODULE, \
- .n_voltages = 1, \
+ .n_voltages = 11, \
+ .vsel_reg = MT6358_##vreg##_ANA_CON0, \
+ .vsel_mask = GENMASK(3, 0), \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
.min_uV = volt, \
+ .uV_step = 10000, \
}, \
.status_reg = MT6358_LDO_##vreg##_CON1, \
.qi = BIT(15), \
@@ -219,10 +222,13 @@ struct mt6358_regulator_info {
.type = REGULATOR_VOLTAGE, \
.id = MT6366_ID_##vreg, \
.owner = THIS_MODULE, \
- .n_voltages = 1, \
+ .n_voltages = 11, \
+ .vsel_reg = MT6358_##vreg##_ANA_CON0, \
+ .vsel_mask = GENMASK(3, 0), \
.enable_reg = enreg, \
.enable_mask = BIT(enbit), \
.min_uV = volt, \
+ .uV_step = 10000, \
}, \
.status_reg = MT6358_LDO_##vreg##_CON1, \
.qi = BIT(15), \
@@ -476,8 +482,13 @@ static const struct regulator_ops mt6358_volt_table_ops = {
.get_status = mt6358_get_status,
};

+/* "Fixed" LDOs with output voltage calibration +0 ~ +10 mV */
static const struct regulator_ops mt6358_volt_fixed_ops = {
.list_voltage = regulator_list_voltage_linear,
+ .map_voltage = regulator_map_voltage_linear,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = mt6358_get_buck_voltage_sel,
+ .set_voltage_time_sel = regulator_set_voltage_time_sel,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
--
2.41.0.162.gfafddb0af9-goog