15149b685SErick ChenSpreadtrum SC2731 Voltage regulators 25149b685SErick Chen 35149b685SErick ChenThe SC2731 integrates low-voltage and low quiescent current DCDC/LDO. 45149b685SErick Chen14 LDO and 3 DCDCs are designed for external use. All DCDCs/LDOs have 55149b685SErick Chentheir own bypass (power-down) control signals. External tantalum or MLCC 65149b685SErick Chenceramic capacitors are recommended to use with these LDOs. 75149b685SErick Chen 85149b685SErick ChenRequired properties: 95149b685SErick Chen - compatible: should be "sprd,sc27xx-regulator". 105149b685SErick Chen 115149b685SErick ChenList of regulators provided by this controller. It is named according to 125149b685SErick Chenits regulator type, BUCK_<name> and LDO_<name>. The definition for each 135149b685SErick Chenof these nodes is defined using the standard binding for regulators at 145149b685SErick ChenDocumentation/devicetree/bindings/regulator/regulator.txt. 155149b685SErick Chen 165149b685SErick ChenThe valid names for regulators are: 175149b685SErick ChenBUCK: 185149b685SErick Chen BUCK_CPU0, BUCK_CPU1, BUCK_RF 195149b685SErick ChenLDO: 205149b685SErick Chen LDO_CAMA0, LDO_CAMA1, LDO_CAMMOT, LDO_VLDO, LDO_EMMCCORE, LDO_SDCORE, 215149b685SErick Chen LDO_SDIO, LDO_WIFIPA, LDO_USB33, LDO_CAMD0, LDO_CAMD1, LDO_CON, 225149b685SErick Chen LDO_CAMIO, LDO_SRAM 235149b685SErick Chen 245149b685SErick ChenExample: 255149b685SErick Chen regulators { 265149b685SErick Chen compatible = "sprd,sc27xx-regulator"; 275149b685SErick Chen 285149b685SErick Chen vddarm0: BUCK_CPU0 { 295149b685SErick Chen regulator-name = "vddarm0"; 305149b685SErick Chen regulator-min-microvolt = <400000>; 315149b685SErick Chen regulator-max-microvolt = <1996875>; 325149b685SErick Chen regulator-ramp-delay = <25000>; 335149b685SErick Chen regulator-always-on; 345149b685SErick Chen }; 355149b685SErick Chen 365149b685SErick Chen vddcama0: LDO_CAMA0 { 375149b685SErick Chen regulator-name = "vddcama0"; 385149b685SErick Chen regulator-min-microvolt = <1200000>; 395149b685SErick Chen regulator-max-microvolt = <3750000>; 405149b685SErick Chen regulator-enable-ramp-delay = <100>; 415149b685SErick Chen }; 425149b685SErick Chen ... 435149b685SErick Chen }; 44