regulator: tps549b22: add TI TPS549b22 support

Change-Id: I7550fc9f78a30b5d8ff705403ad91cfd8727fad6
Signed-off-by: XiaoDong Huang <derrick.huang@rock-chips.com>

Author: derrick-huang

Documentation/devicetree/bindings/regulator/tps549b22-regulator.txt

@@ -0,0 +1,27 @@
+TPS549b22 Voltage regulators
+
+Required properties:
+- compatible: Must be "ti,tps549b22"
+- reg: I2C slave address
+
+Any property defined as part of the core regulator binding, defined in
+regulator.txt, can also be used.
+
+Example:
+	tps549b22@1e {
+		compatible = "ti,tps549b22";
+		reg = <0x1e>;
+		regulators {
+			#address-cells = <1>;
+			#size-cells = <0>;
+			regulator@0 {
+				reg = <0>;
+				regulator-compatible = "tps549b22_dcdc";
+				regulator-name = "vdd_xxx";
+				regulator-min-microvolt = <767500>;
+				regulator-max-microvolt = <1535000>;
+				regulator-always-on;
+				regulator-boot-on;
+			};
+		};
+	};

drivers/regulator/Kconfig

@@ -679,6 +679,13 @@ config REGULATOR_TPS51632
 	  The voltage output can be configure through I2C interface or PWM
 	  interface.
 
+config REGULATOR_TPS549B22
+	tristate "TI TPS549B22 Power regulators"
+	depends on I2C
+	help
+	  This driver supports TPS549B22 voltage regulator chip.
+	  The voltage output can be configure through I2C interface.
+
 config REGULATOR_TPS6105X
 	tristate "TI TPS6105X Power regulators"
 	depends on TPS6105X

drivers/regulator/Makefile

@@ -85,6 +85,7 @@ obj-$(CONFIG_REGULATOR_SKY81452) += sky81452-regulator.o
 obj-$(CONFIG_REGULATOR_STW481X_VMMC) += stw481x-vmmc.o
 obj-$(CONFIG_REGULATOR_SYR82X) += syr82x.o
 obj-$(CONFIG_REGULATOR_TI_ABB) += ti-abb-regulator.o
+obj-$(CONFIG_REGULATOR_TPS549B22) += tps549b22-regulator.o
 obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
 obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
 obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
@@ -107,5 +108,4 @@ obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
 obj-$(CONFIG_REGULATOR_XZ3216) += xz3216.o
 
-
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG