In this patch, LDO's adjustable and fixed Vout settings are compatible.
The LDO Vout ability depends on "richtek,fixed-microvolt".
If adjustable, the Vout can be set to either 1800mV or 3300mV.
Signed-off-by: Alina Yu <alina_yu@xxxxxxxxxxx>
---
v3
- Add "richtek,fixed-microvolt" to specify LDO fixed voltage
- Check specified desc->fixed_uV matches with constraints->min_uV and constraints->max_uV
---
drivers/regulator/rtq2208-regulator.c | 43 ++++++++++++++++++++++++++++++-----
1 file changed, 37 insertions(+), 6 deletions(-)
diff --git a/drivers/regulator/rtq2208-regulator.c b/drivers/regulator/rtq2208-regulator.c
index 2e9387f..c2c1689 100644
--- a/drivers/regulator/rtq2208-regulator.c
+++ b/drivers/regulator/rtq2208-regulator.c
@@ -219,7 +219,7 @@ static const struct regulator_ops rtq2208_regulator_buck_ops = {
.set_suspend_mode = rtq2208_set_suspend_mode,
};
-static const struct regulator_ops rtq2208_regulator_ldo_ops = {
+static const struct regulator_ops rtq2208_regulator_ldo_fix_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
@@ -228,6 +228,23 @@ static const struct regulator_ops rtq2208_regulator_ldo_ops = {
.set_suspend_disable = rtq2208_set_suspend_disable,
};
+static const struct regulator_ops rtq2208_regulator_ldo_adj_ops = {
+ .enable = regulator_enable_regmap,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
+ .list_voltage = regulator_list_voltage_table,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_active_discharge = regulator_set_active_discharge_regmap,
+ .set_suspend_enable = rtq2208_set_suspend_enable,
+ .set_suspend_disable = rtq2208_set_suspend_disable,
+};
+
+static const unsigned int rtq2208_ldo_volt_table[] = {
+ 1800000,
+ 3300000,
+};
+
static struct of_regulator_match rtq2208_ldo_match[] = {
{.name = "ldo2", },
{.name = "ldo1", },
@@ -358,8 +375,9 @@ static int rtq2208_of_get_ldo_dvs_ability(struct device *dev)
{
struct device_node *np;
struct of_regulator_match *match;
- struct rtq2208_regulator_desc *rdesc;
+ struct regulator_desc *desc;
struct regulator_init_data *init_data;
+ u32 fixed_uV;
int ret, i;
if (!dev->of_node)
@@ -379,13 +397,26 @@ static int rtq2208_of_get_ldo_dvs_ability(struct device *dev)
for (i = 0; i < ARRAY_SIZE(rtq2208_ldo_match); i++) {
match = rtq2208_ldo_match + i;
init_data = match->init_data;
- rdesc = (struct rtq2208_regulator_desc *)match->driver_data;
+ desc = (struct regulator_desc *)match->desc;
- if (!init_data || !rdesc)
+ if (!init_data || !desc)
continue;
- if (init_data->constraints.min_uV == init_data->constraints.max_uV)
- rdesc->desc.fixed_uV = init_data->constraints.min_uV;
+ /* specify working fixed voltage if the propery exists */
+ ret = of_property_read_u32(match->of_node, "richtek,fixed-microvolt", &fixed_uV);
+
+ if (!ret) {
+ if (fixed_uV != init_data->constraints.min_uV ||
+ fixed_uV != init_data->constraints.max_uV)
+ return -EINVAL;
+ desc->n_voltages = 1;
+ desc->fixed_uV = fixed_uV;
+ desc->ops = &rtq2208_regulator_ldo_fix_ops;
+ } else {
+ desc->n_voltages = ARRAY_SIZE(rtq2208_ldo_volt_table);
+ desc->volt_table = rtq2208_ldo_volt_table;
+ desc->ops = &rtq2208_regulator_ldo_adj_ops;
+ }
}
return 0;
--
2.7.4
