1*4882a593SmuzhiyunSpreadtrum SC2731 Voltage regulators 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunThe SC2731 integrates low-voltage and low quiescent current DCDC/LDO. 4*4882a593Smuzhiyun14 LDO and 3 DCDCs are designed for external use. All DCDCs/LDOs have 5*4882a593Smuzhiyuntheir own bypass (power-down) control signals. External tantalum or MLCC 6*4882a593Smuzhiyunceramic capacitors are recommended to use with these LDOs. 7*4882a593Smuzhiyun 8*4882a593SmuzhiyunRequired properties: 9*4882a593Smuzhiyun - compatible: should be "sprd,sc27xx-regulator". 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunList of regulators provided by this controller. It is named according to 12*4882a593Smuzhiyunits regulator type, BUCK_<name> and LDO_<name>. The definition for each 13*4882a593Smuzhiyunof these nodes is defined using the standard binding for regulators at 14*4882a593SmuzhiyunDocumentation/devicetree/bindings/regulator/regulator.txt. 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunThe valid names for regulators are: 17*4882a593SmuzhiyunBUCK: 18*4882a593Smuzhiyun BUCK_CPU0, BUCK_CPU1, BUCK_RF 19*4882a593SmuzhiyunLDO: 20*4882a593Smuzhiyun LDO_CAMA0, LDO_CAMA1, LDO_CAMMOT, LDO_VLDO, LDO_EMMCCORE, LDO_SDCORE, 21*4882a593Smuzhiyun LDO_SDIO, LDO_WIFIPA, LDO_USB33, LDO_CAMD0, LDO_CAMD1, LDO_CON, 22*4882a593Smuzhiyun LDO_CAMIO, LDO_SRAM 23*4882a593Smuzhiyun 24*4882a593SmuzhiyunExample: 25*4882a593Smuzhiyun regulators { 26*4882a593Smuzhiyun compatible = "sprd,sc27xx-regulator"; 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun vddarm0: BUCK_CPU0 { 29*4882a593Smuzhiyun regulator-name = "vddarm0"; 30*4882a593Smuzhiyun regulator-min-microvolt = <400000>; 31*4882a593Smuzhiyun regulator-max-microvolt = <1996875>; 32*4882a593Smuzhiyun regulator-ramp-delay = <25000>; 33*4882a593Smuzhiyun regulator-always-on; 34*4882a593Smuzhiyun }; 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun vddcama0: LDO_CAMA0 { 37*4882a593Smuzhiyun regulator-name = "vddcama0"; 38*4882a593Smuzhiyun regulator-min-microvolt = <1200000>; 39*4882a593Smuzhiyun regulator-max-microvolt = <3750000>; 40*4882a593Smuzhiyun regulator-enable-ramp-delay = <100>; 41*4882a593Smuzhiyun }; 42*4882a593Smuzhiyun ... 43*4882a593Smuzhiyun }; 44