regulator: rk808: maps a hardware mode defined in a DTS to a standard mode

Change-Id: I304e0cbb3544abde112180b6ec459670d91c99ae
Signed-off-by: shengfei Xu <xsf@rock-chips.com>

Author: power-xsf

Documentation/devicetree/bindings/mfd/rk816.txt

@@ -25,6 +25,10 @@ Optional properties:
 - vcc5-supply:  The input supply for LDO_REG1, LDO_REG2, LDO_REG3
 - vcc6-supply:  The input supply for LDO_REG4, LDO_REG5, LDO_REG6
 
+- regulator-initial-mode: default mode to set on startup
+- regulator-initial-mode is set as:
+	REGULATOR_MODE_FAST			0x1
+	REGULATOR_MODE_NORMAL			0x2
 Regulators: All the regulators of RK816 to be instantiated shall be
 listed in a child node named 'regulators'. Each regulator is represented
 by a child node of the 'regulators' node.
@@ -104,6 +108,7 @@ Example:
 				regulator-min-microvolt = <750000>;
 				regulator-max-microvolt = <1450000>;
 				regulator-ramp-delay = <6001>;
+				regulator-initial-mode = <1>;
 				regulator-state-mem {
 					regulator-off-in-suspend;
 				};
@@ -115,6 +120,7 @@ Example:
 				regulator-min-microvolt = <800000>;
 				regulator-max-microvolt = <1250000>;
 				regulator-ramp-delay = <6001>;
+				regulator-initial-mode = <1>;
 				regulator-state-mem {
 					regulator-on-in-suspend;
 					regulator-suspend-microvolt = <1000000>;
@@ -125,6 +131,7 @@ Example:
 				regulator-always-on;
 				regulator-boot-on;
 				regulator-name = "vcc_ddr";
+				regulator-initial-mode = <1>;
 				regulator-state-mem {
 					regulator-on-in-suspend;
 				};
@@ -136,6 +143,7 @@ Example:
 				regulator-min-microvolt = <3300000>;
 				regulator-max-microvolt = <3300000>;
 				regulator-name = "vcc33_io";
+				regulator-initial-mode = <1>;
 				regulator-state-mem {
 					regulator-on-in-suspend;
 					regulator-suspend-microvolt = <3300000>;

drivers/regulator/rk808-regulator.c

@@ -156,6 +156,16 @@ static const struct regulator_linear_range rk816_buck4_voltage_ranges[] = {
 	REGULATOR_LINEAR_RANGE(3500000, 27, 31, 0),	/* 3.5v */
 };
 
+static unsigned int rk8xx_regulator_of_map_mode(unsigned int mode)
+{
+	if (mode == 1)
+		return REGULATOR_MODE_FAST;
+	if (mode == 2)
+		return REGULATOR_MODE_NORMAL;
+
+	return -EINVAL;
+}
+
 static int rk808_buck1_2_get_voltage_sel_regmap(struct regulator_dev *rdev)
 {
 	struct rk808_regulator_data *pdata = rdev_get_drvdata(rdev);
@@ -715,6 +725,7 @@ static const struct regulator_desc rk816_reg[] = {
 		.enable_mask = BIT(4) | BIT(0),
 		.enable_val = BIT(4) | BIT(0),
 		.disable_val = BIT(4),
+		.of_map_mode = rk8xx_regulator_of_map_mode,
 		.owner = THIS_MODULE,
 	}, {
 		.name = "DCDC_REG2",
@@ -733,6 +744,7 @@ static const struct regulator_desc rk816_reg[] = {
 		.enable_mask = BIT(5) | BIT(1),
 		.enable_val = BIT(5) | BIT(1),
 		.disable_val = BIT(5),
+		.of_map_mode = rk8xx_regulator_of_map_mode,
 		.owner = THIS_MODULE,
 	}, {
 		.name = "DCDC_REG3",
@@ -747,6 +759,7 @@ static const struct regulator_desc rk816_reg[] = {
 		.enable_mask = BIT(6) | BIT(2),
 		.enable_val =  BIT(6) | BIT(2),
 		.disable_val = BIT(6),
+		.of_map_mode = rk8xx_regulator_of_map_mode,
 		.owner = THIS_MODULE,
 	}, {
 		.name = "DCDC_REG4",
@@ -765,6 +778,7 @@ static const struct regulator_desc rk816_reg[] = {
 		.enable_mask = BIT(7) | BIT(3),
 		.enable_val = BIT(7) | BIT(3),
 		.disable_val = BIT(7),
+		.of_map_mode = rk8xx_regulator_of_map_mode,
 		.owner = THIS_MODULE,
 	},
 	RK816_DESC(RK816_ID_LDO1, "LDO_REG1", "vcc5", 800, 3400, 100,