regulator: mp8859: Report slew rate

The MP8859 implements voltage changes at the rate of 1mV/us, tell the core
about this so that it can provide appropriate delays on voltage changes.

Tested-by: Markus Reichl <m.reichl@fivetechno.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/r/20240225-regulator-mp8859-v1-7-68ee2c839ded@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/regulator/mp8859.c b/drivers/regulator/mp8859.c
index fc1636d69bca9566c3b438385c93923cd0d917a3..3e849e1a172fc3805f8749f66902cfbf3023812e 100644 (file)
--- a/drivers/regulator/mp8859.c
+++ b/drivers/regulator/mp8859.c
@@ -81,6 +81,20 @@ static int mp8859_get_voltage_sel(struct regulator_dev *rdev)
        return val;
 }
 
+static int mp8859_set_voltage_time_sel(struct regulator_dev *rdev,
+                                      unsigned int from, unsigned int to)
+{
+       int change;
+
+       /* The voltage ramps at 1mV/uS, selectors are 10mV */
+       if (from > to)
+               change = from - to;
+       else
+               change = to - from;
+
+       return change * 10 * 1000;
+}
+
 static unsigned int mp8859_get_mode(struct regulator_dev *rdev)
 {
        unsigned int val;
@@ -220,6 +234,7 @@ static const struct regulator_ops mp8859_ops = {
        .set_voltage_sel = mp8859_set_voltage_sel,
        .get_voltage_sel = mp8859_get_voltage_sel,
        .list_voltage = regulator_list_voltage_linear_range,
+       .set_voltage_time_sel = mp8859_set_voltage_time_sel,
        .enable = regulator_enable_regmap,
        .disable = regulator_disable_regmap,
        .is_enabled = regulator_is_enabled_regmap,