1Binding for Samsung S2MPA01 regulator block 2=========================================== 3 4This is a part of device tree bindings for S2M family multi-function devices. 5More information can be found in bindings/mfd/sec-core.txt file. 6 7The S2MPA01 device provide buck and LDO regulators. 8 9To register these with regulator framework instantiate under main device node 10a sub-node named "regulators" with more sub-nodes for each regulator using the 11common regulator binding documented in: 12 - Documentation/devicetree/bindings/regulator/regulator.txt 13 14 15Names of regulators supported by S2MPA01 device: 16 - LDOn 17 - valid values for n are 1 to 26 18 - Example: LDO1, LD02, LDO26 19 - BUCKn 20 - valid values for n are 1 to 10. 21 - Example: BUCK1, BUCK2, BUCK9 22Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number 23as per the datasheet of device. 24 25 26Optional properties of buck regulator nodes under "regulators" sub-node: 27 - regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500 28 (default), 25000, or 50000. May be 0 for disabling the ramp delay on 29 BUCK{1,2,3,4}. 30 31 In the absence of the regulator-ramp-delay property, the default ramp 32 delay will be used. 33 34 Note: Some bucks share the ramp rate setting i.e. same ramp value 35 will be set for a particular group of bucks so provide the same 36 regulator-ramp-delay value for them. 37 Groups sharing ramp rate: 38 - buck{1,6}, 39 - buck{2,4}, 40 - buck{8,9,10}. 41 42Example: 43 44 s2mpa01_pmic@66 { 45 compatible = "samsung,s2mpa01-pmic"; 46 reg = <0x66>; 47 48 regulators { 49 ldo1_reg: LDO1 { 50 regulator-name = "VDD_ALIVE"; 51 regulator-min-microvolt = <1000000>; 52 regulator-max-microvolt = <1000000>; 53 }; 54 55 ldo2_reg: LDO2 { 56 regulator-name = "VDDQ_MMC2"; 57 regulator-min-microvolt = <2800000>; 58 regulator-max-microvolt = <2800000>; 59 regulator-always-on; 60 }; 61 62 buck1_reg: BUCK1 { 63 regulator-name = "vdd_mif"; 64 regulator-min-microvolt = <950000>; 65 regulator-max-microvolt = <1350000>; 66 regulator-always-on; 67 regulator-boot-on; 68 }; 69 70 buck2_reg: BUCK2 { 71 regulator-name = "vdd_arm"; 72 regulator-min-microvolt = <950000>; 73 regulator-max-microvolt = <1350000>; 74 regulator-always-on; 75 regulator-boot-on; 76 regulator-ramp-delay = <50000>; 77 }; 78 }; 79 }; 80