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Commit bc407334 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Mark Brown
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regulator: as3722: add regulator driver for AMS AS3722 



The AMS AS3722 is a compact system PMU suitable for mobile phones,
tablets etc. It has 4 DCDC step down regulators, 3 DCDC step down
controller, 11 LDOs.

Add a driver to support accessing the DCDC/LDOs found on the AMS
AS3722 PMIC using regulators.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarFlorian Lobmaier <florian.lobmaier@ams.com>
Signed-off-by: default avatarMark Brown <broonie@linaro.org>
parent 272b98c6

Documentation/devicetree/bindings/regulator/as3722-regulator.txt

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Regulator of AMS AS3722 PMIC.

Name of the regulator subnode must be "regulators".



Optional properties:

--------------------

The input supply of regulators are the optional properties on the

regulator node. The AS3722 is having 7 DCDC step-down regulators as

sd[0-6], 10 LDOs as ldo[0-7], ldo[9-11]. The input supply of these

regulators are provided through following properties:

vsup-sd2-supply: Input supply for SD2.

vsup-sd3-supply: Input supply for SD3.

vsup-sd4-supply: Input supply for SD4.

vsup-sd5-supply: Input supply for SD5.

vin-ldo0-supply: Input supply for LDO0.

vin-ldo1-6-supply: Input supply for LDO1 and LDO6.

vin-ldo2-5-7-supply: Input supply for LDO2, LDO5 and LDO7.

vin-ldo3-4-supply: Input supply for LDO3 and LDO4.

vin-ldo9-10-supply: Input supply for LDO9 and LDO10.

vin-ldo11-supply: Input supply for LDO11.



Optional nodes:

--------------

- regulators : Must contain a sub-node per regulator from the list below.

	       Each sub-node should contain the constraints and initialization

	       information for that regulator. See regulator.txt for a

	       description of standard properties for these sub-nodes.

	       Additional custom properties  are listed below.

	       sd[0-6], ldo[0-7], ldo[9-11].



	       Optional sub-node properties:

	       ----------------------------

		ams,ext-control: External control of the rail. The option of

			this properties will tell which external input is

			controlling this rail. Valid values are 0, 1, 2 ad 3.

			0: There is no external control of this rail.

			1: Rail is controlled by ENABLE1 input pin.

			2: Rail is controlled by ENABLE2 input pin.

			3: Rail is controlled by ENABLE3 input pin.

		ams,enable-tracking: Enable tracking with SD1, only supported

			by LDO3.



Example:

-------

	ams3722: ams3722 {

		compatible = "ams,as3722";

		reg = <0x40>;

		...



		regulators {

			vsup-sd2-supply = <...>;

			...



			sd0 {

				regulator-name = "vdd_cpu";

				regulator-min-microvolt = <700000>;

				regulator-max-microvolt = <1400000>;

				regulator-always-on;

				ams,ext-control = <2>;

			};



			sd1 {

				regulator-name = "vdd_core";

				regulator-min-microvolt = <700000>;

				regulator-max-microvolt = <1400000>;

				regulator-always-on;

				ams,ext-control = <1>;

			};



			sd2 {

				regulator-name = "vddio_ddr";

				regulator-min-microvolt = <1350000>;

				regulator-max-microvolt = <1350000>;

				regulator-always-on;

			};



			sd4 {

				regulator-name = "avdd-hdmi-pex";

				regulator-min-microvolt = <1050000>;

				regulator-max-microvolt = <1050000>;

				regulator-always-on;

			};



			sd5 {

				regulator-name = "vdd-1v8";

				regulator-min-microvolt = <1800000>;

				regulator-max-microvolt = <1800000>;

				regulator-always-on;

			};

			....

		};

	};

drivers/regulator/Kconfig

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@@ -133,6 +133,14 @@ config REGULATOR_AS3711 
	  This driver provides support for the voltage regulators on the

	  AS3711 PMIC



config REGULATOR_AS3722

	tristate "AMS AS3722 PMIC Regulators"

	depends on MFD_AS3722

	help

	  This driver provides support for the voltage regulators on the

	  AS3722 PMIC. This will enable support for all the software

	  controllable DCDC/LDO regulators.



config REGULATOR_DA903X

	tristate "Dialog Semiconductor DA9030/DA9034 regulators"

	depends on PMIC_DA903X

drivers/regulator/Makefile

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@@ -18,6 +18,7 @@ obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o 
obj-$(CONFIG_REGULATOR_ANATOP) += anatop-regulator.o

obj-$(CONFIG_REGULATOR_ARIZONA) += arizona-micsupp.o arizona-ldo1.o

obj-$(CONFIG_REGULATOR_AS3711) += as3711-regulator.o

obj-$(CONFIG_REGULATOR_AS3722) += as3722-regulator.o

obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o

obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o

obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o

drivers/regulator/as3722-regulator.c

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