regulator: max77686: Add suspend disable for some LDOs

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>
Reviewed-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 8 insertions, 4 deletions

diff --git a/drivers/regulator/max77686.c b/drivers/regulator/max77686.c
index 0c1541754e8c..09b0d8c20a9d 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 +250,7 @@ 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_set_suspend_disable,
 };
 
 static struct regulator_ops max77686_buck1_ops = {
@@ -258,7 +262,7 @@ 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,
 };
 
 static struct regulator_ops max77686_buck_dvs_ops = {
@@ -271,7 +275,7 @@ 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,
 };
 
 #define regulator_desc_ldo(num)         {                               \