[PATCH v5 3/4] regulator: max77686: Add suspend disable for some LDOs

Krzysztof Kozlowski
2014-10-27T12:12:12Z

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.

Add suspend disable for LDO regulators supporting this. Re-use existing
max77686_buck_set_suspend_disable() function. This helps reducing
energy consumption during system sleep.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
---
drivers/regulator/max77686.c | 15 +++++++++++----
1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index 2ebc4257425b..c6bf6f79bd2a 100644
--- a/drivers/regulator/max77686.c
+++ b/drivers/regulator/max77686.c
@@ -99,8 +99,8 @@ static unsigned int max77686_get_opmode_shift(int id)
}
}

-/* Some BUCKS supports Normal[ON/OFF] mode during suspend */
-static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev)
+/* Some BUCKs and LDOs supports Normal[ON/OFF] mode during suspend */
+static int max77686_set_suspend_disable(struct regulator_dev *rdev)
{
unsigned int val, shift;
struct max77686_data *max77686 = rdev_get_drvdata(rdev);
@@ -195,6 +195,9 @@ static int max77686_enable(struct regulator_dev *rdev)

shift = max77686_get_opmode_shift(id);

+ if (max77686->opmode[id] == MAX77686_OFF_PWRREQ)
+ max77686->opmode[id] = MAX77686_NORMAL;
+
return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
rdev->desc->enable_mask,
max77686->opmode[id] << shift);
@@ -247,6 +250,8 @@ 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_set_suspend_disable,
+ .set_suspend_enable = max77686_enable,
};

static struct regulator_ops max77686_buck1_ops = {
@@ -258,7 +263,8 @@ static struct regulator_ops max77686_buck1_ops = {
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
- .set_suspend_disable = max77686_buck_set_suspend_disable,
+ .set_suspend_disable = max77686_set_suspend_disable,
+ .set_suspend_enable = max77686_enable,
};

static struct regulator_ops max77686_buck_dvs_ops = {
@@ -271,7 +277,8 @@ static struct regulator_ops max77686_buck_dvs_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = max77686_set_ramp_delay,
- .set_suspend_disable = max77686_buck_set_suspend_disable,
+ .set_suspend_disable = max77686_set_suspend_disable,
+ .set_suspend_enable = max77686_enable,
};

#define regulator_desc_ldo(num) { \
--
1.9.1