[PATCH v2 1/7] regulator: max77802: Add .{get,set}_mode callbacks

[Javier Martinez Canillas <javier.martinez@collabora.co.uk>]

Some max77802 LDOs (1, 3, 20 and 21) support to be configured in Low
Power Mode during system normal operation. Add function handlers for
the .get_mode and .set_mode operations to set the mode on these LDOs.

Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
---

Changes since v1:
 - Use a static inline function instead of a macro to map the modes.
   Suggested by Mark Brown.
 - Don't have multiple standard modes mapping onto a single hw mode.
   Suggested by Mark Brown.

 drivers/regulator/max77802.c | 46 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/regulator/max77802.c b/drivers/regulator/max77802.c
index 8425c0d..6eabb95 100644
--- a/drivers/regulator/max77802.c
+++ b/drivers/regulator/max77802.c
@@ -70,6 +70,12 @@ struct max77802_regulator_prv {
 	unsigned int opmode[MAX77802_REG_MAX];
 };
 
+static inline int max77802_map_mode(int mode)
+{
+	return mode == MAX77802_OPMODE_NORMAL ?
+		REGULATOR_MODE_NORMAL : REGULATOR_MODE_STANDBY;
+}
+
 static int max77802_get_opmode_shift(int id)
 {
 	if (id == MAX77802_BUCK1 || (id >= MAX77802_BUCK5 &&
@@ -105,6 +111,44 @@ static int max77802_set_suspend_disable(struct regulator_dev *rdev)
 }
 
 /*
+ * Some LDOs support Low Power Mode while the system is running.
+ *
+ * LDOs 1, 3, 20, 21.
+ */
+static int max77802_set_mode(struct regulator_dev *rdev, unsigned int mode)
+{
+	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+	unsigned int val;
+	int shift = max77802_get_opmode_shift(id);
+
+	switch (mode) {
+	case REGULATOR_MODE_STANDBY:
+		val = MAX77802_OPMODE_LP;	/* ON in Low Power Mode */
+		break;
+	case REGULATOR_MODE_NORMAL:
+		val = MAX77802_OPMODE_NORMAL;	/* ON in Normal Mode */
+		break;
+	default:
+		dev_warn(&rdev->dev, "%s: regulator mode: 0x%x not supported\n",
+			 rdev->desc->name, mode);
+		return -EINVAL;
+	}
+
+	max77802->opmode[id] = val;
+	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				  rdev->desc->enable_mask, val << shift);
+}
+
+static unsigned max77802_get_mode(struct regulator_dev *rdev)
+{
+	struct max77802_regulator_prv *max77802 = rdev_get_drvdata(rdev);
+	int id = rdev_get_id(rdev);
+
+	return max77802_map_mode(max77802->opmode[id]);
+}
+
+/*
  * Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state
  * (Enable Control Logic1 by PWRREQ)
  *
@@ -268,6 +312,8 @@ static struct regulator_ops max77802_ldo_ops_logic2 = {
 	.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_mode		= max77802_set_mode,
+	.get_mode		= max77802_get_mode,
 	.set_suspend_mode	= max77802_ldo_set_suspend_mode_logic2,
 };
 
-- 
2.1.0