Spreadtrum SC2731 Voltage regulators

The SC2731 integrates low-voltage and low quiescent current DCDC/LDO.

14 LDO and 3 DCDCs are designed for external use. All DCDCs/LDOs have

their own bypass (power-down) control signals. External tantalum or MLCC

ceramic capacitors are recommended to use with these LDOs.

Required properties:

- compatible: should be "sprd,sc27xx-regulator".

List of regulators provided by this controller. It is named according to

its regulator type, BUCK_<name> and LDO_<name>. The definition for each

of these nodes is defined using the standard binding for regulators at

Documentation/devicetree/bindings/regulator/regulator.txt.

The valid names for regulators are:

BUCK:

BUCK_CPU0, BUCK_CPU1, BUCK_RF

LDO:

LDO_CAMA0, LDO_CAMA1, LDO_CAMMOT, LDO_VLDO, LDO_EMMCCORE, LDO_SDCORE,

LDO_SDIO, LDO_WIFIPA, LDO_USB33, LDO_CAMD0, LDO_CAMD1, LDO_CON,

LDO_CAMIO, LDO_SRAM

Example:

regulators {

compatible = "sprd,sc27xx-regulator";

vddarm0: BUCK_CPU0 {

regulator-name = "vddarm0";

regulator-min-microvolt = <400000>;

regulator-max-microvolt = <1996875>;

regulator-ramp-delay = <25000>;

regulator-always-on;

};

vddcama0: LDO_CAMA0 {

regulator-name = "vddcama0";

regulator-min-microvolt = <1200000>;

regulator-max-microvolt = <3750000>;

regulator-enable-ramp-delay = <100>;

};

...

};