regulator: da9052: Add ramp speed information for the DVC regulators

Some LDOs and DCDCs have a fixed ramp speed of 6.25 mV/µs. This patch adds
the set_voltage_time_sel function to let consumers know about this.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index 889c7c9b9f15..fdb6ea8ae7e6 100644
--- a/drivers/regulator/da9052-regulator.c
+++ b/drivers/regulator/da9052-regulator.c
@@ -240,6 +240,31 @@ static int da9052_regulator_set_voltage_sel(struct regulator_dev *rdev,
         return ret;
 }
 
+static int da9052_regulator_set_voltage_time_sel(struct regulator_dev *rdev,
+                                                 unsigned int old_sel,
+                                                 unsigned int new_sel)
+{
+        struct da9052_regulator *regulator = rdev_get_drvdata(rdev);
+        struct da9052_regulator_info *info = regulator->info;
+        int id = rdev_get_id(rdev);
+        int ret = 0;
+
+        /* The DVC controlled LDOs and DCDCs ramp with 6.25mV/µs after enabling
+         * the activate bit.
+         */
+        switch (id) {
+        case DA9052_ID_BUCK1:
+        case DA9052_ID_BUCK2:
+        case DA9052_ID_BUCK3:
+        case DA9052_ID_LDO2:
+        case DA9052_ID_LDO3:
+                ret = (new_sel - old_sel) * info->step_uV / 6250;
+                break;
+        }
+
+        return ret;
+}
+
 static struct regulator_ops da9052_dcdc_ops = {
         .get_current_limit = da9052_dcdc_get_current_limit,
         .set_current_limit = da9052_dcdc_set_current_limit,
@@ -248,6 +273,7 @@ static struct regulator_ops da9052_dcdc_ops = {
         .map_voltage = da9052_map_voltage,
         .get_voltage_sel = regulator_get_voltage_sel_regmap,
         .set_voltage_sel = da9052_regulator_set_voltage_sel,
+        .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
         .is_enabled = regulator_is_enabled_regmap,
         .enable = regulator_enable_regmap,
         .disable = regulator_disable_regmap,
@@ -258,6 +284,7 @@ static struct regulator_ops da9052_ldo_ops = {
         .map_voltage = da9052_map_voltage,
         .get_voltage_sel = regulator_get_voltage_sel_regmap,
         .set_voltage_sel = da9052_regulator_set_voltage_sel,
+        .set_voltage_time_sel = da9052_regulator_set_voltage_time_sel,
         .is_enabled = regulator_is_enabled_regmap,
         .enable = regulator_enable_regmap,
         .disable = regulator_disable_regmap,