Some LDOs of Maxim 77686 PMIC support disabling during system suspend
(LDO{2,6,7,8,10,11,12,14,15,16}). This was already implemented as part
of set_suspend_mode function. In that case the mode was one of:
- disable,
- normal mode,
- low power mode.
However there are no bindings for setting the mode during suspend.
Implement a set_suspend_disable function for regulators supporting this.
This helps reducing energy consumption during system sleep.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
---
drivers/regulator/max77686.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index ef1af2debbd2..84603051f24d 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -123,6 +123,24 @@ static int max77686_set_suspend_mode(struct regulator_dev *rdev,
return 0;
}
+static int max77686_ldo_set_suspend_disable(struct regulator_dev *rdev,
+ unsigned int mode)
+{
+ unsigned int val;
+ struct max77686_data *max77686 = rdev_get_drvdata(rdev);
+ int ret;
+
+ val = 0x1 << MAX77686_OPMODE_SHIFT;
+
+ ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+ rdev->desc->enable_mask, val);
+ if (ret)
+ return ret;
+
+ max77686->opmode[rdev_get_id(rdev)] = val;
+ return 0;
+}
+
/* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */
static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev,
unsigned int mode)
@@ -212,6 +230,7 @@ static struct regulator_ops max77686_ldo_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_suspend_mode = max77686_ldo_set_suspend_mode,
+ .set_suspend_disable = max77686_ldo_set_suspend_disable,
};
static struct regulator_ops max77686_buck1_ops = {
--
1.9.1
--
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