Binding for Samsung S2MPA01 regulator block =========================================== This is a part of device tree bindings for S2M family multi-function devices. More information can be found in bindings/mfd/sec-core.txt file. The S2MPA01 device provide buck and LDO regulators. To register these with regulator framework instantiate under main device node a sub-node named "regulators" with more sub-nodes for each regulator using the common regulator binding documented in: - Documentation/devicetree/bindings/regulator/regulator.txt Names of regulators supported by S2MPA01 device: - LDOn - valid values for n are 1 to 26 - Example: LDO1, LD02, LDO26 - BUCKn - valid values for n are 1 to 10. - Example: BUCK1, BUCK2, BUCK9 Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number as per the datasheet of device. Optional properties of buck regulator nodes under "regulators" sub-node: - regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500 (default), 25000, or 50000. May be 0 for disabling the ramp delay on BUCK{1,2,3,4}. In the absence of the regulator-ramp-delay property, the default ramp delay will be used. Note: Some bucks share the ramp rate setting i.e. same ramp value will be set for a particular group of bucks so provide the same regulator-ramp-delay value for them. Groups sharing ramp rate: - buck{1,6}, - buck{2,4}, - buck{8,9,10}. Example: s2mpa01_pmic@66 { compatible = "samsung,s2mpa01-pmic"; reg = <0x66>; regulators { ldo1_reg: LDO1 { regulator-name = "VDD_ALIVE"; regulator-min-microvolt = <1000000>; regulator-max-microvolt = <1000000>; }; ldo2_reg: LDO2 { regulator-name = "VDDQ_MMC2"; regulator-min-microvolt = <2800000>; regulator-max-microvolt = <2800000>; regulator-always-on; }; buck1_reg: BUCK1 { regulator-name = "vdd_mif"; regulator-min-microvolt = <950000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-boot-on; }; buck2_reg: BUCK2 { regulator-name = "vdd_arm"; regulator-min-microvolt = <950000>; regulator-max-microvolt = <1350000>; regulator-always-on; regulator-boot-on; regulator-ramp-delay = <50000>; }; }; };