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Message-Id: <1391697321-14231-1-git-send-email-p.zabel@pengutronix.de>
Date: Thu, 6 Feb 2014 15:35:21 +0100
From: Philipp Zabel <p.zabel@...gutronix.de>
To: linux-kernel@...r.kernel.org
Cc: Mark Brown <broonie@...nel.org>,
Liam Girdwood <lgirdwood@...il.com>, kernel@...gutronix.de,
Philipp Zabel <p.zabel@...gutronix.de>
Subject: [PATCH] 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@...gutronix.de>
---
drivers/regulator/da9052-regulator.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/drivers/regulator/da9052-regulator.c b/drivers/regulator/da9052-regulator.c
index 3adeaef..e0dbfec 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,
--
1.8.5.3
--
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