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Diffstat (limited to 'Documentation/devicetree/bindings/regulator/as3722-regulator.txt')
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diff --git a/Documentation/devicetree/bindings/regulator/as3722-regulator.txt b/Documentation/devicetree/bindings/regulator/as3722-regulator.txt new file mode 100644 index 000000000..caad0c8a2 --- /dev/null +++ b/Documentation/devicetree/bindings/regulator/as3722-regulator.txt @@ -0,0 +1,91 @@ +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; + }; + .... + }; + }; |