projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 5d1d147f KK |
1 | Binding for Samsung S2MPA01 regulator block |
| 2 | =========================================== | |
| 3 | ||
| 4 | This is a part of device tree bindings for S2M family multi-function devices. | |
| 5 | More information can be found in bindings/mfd/sec-core.txt file. | |
| 6 | ||
| 7 | The S2MPA01 device provide buck and LDO regulators. | |
| 8 | ||
| 9 | To register these with regulator framework instantiate under main device node | |
| 10 | a sub-node named "regulators" with more sub-nodes for each regulator using the | |
| 11 | common regulator binding documented in: | |
| 12 | - Documentation/devicetree/bindings/regulator/regulator.txt | |
| 13 | ||
| 14 | ||
| 15 | Names 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 | |
| 22 | Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number | |
| 23 | as per the datasheet of device. | |
| 24 | ||
| 25 | ||
| 26 | Optional 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 | ||
| 42 | Example: | |
| 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 | }; |