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102 lines
2.9 KiB
102 lines
2.9 KiB
Binding for Samsung S2M family regulator block |
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============================================== |
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This is a part of device tree bindings for S2M family multi-function devices. |
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More information can be found in bindings/mfd/sec-core.txt file. |
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The S2MPS11/13/14/15 and S2MPU02 devices provide buck and LDO regulators. |
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To register these with regulator framework instantiate under main device node |
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a sub-node named "regulators" with more sub-nodes for each regulator using the |
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common regulator binding documented in: |
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- Documentation/devicetree/bindings/regulator/regulator.txt |
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Names of regulators supported by different devices: |
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- LDOn |
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- valid values for n are: |
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- S2MPS11: 1 to 38 |
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- S2MPS13: 1 to 40 |
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- S2MPS14: 1 to 25 |
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- S2MPS15: 1 to 27 |
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- S2MPU02: 1 to 28 |
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- Example: LDO1, LDO2, LDO28 |
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- BUCKn |
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- valid values for n are: |
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- S2MPS11: 1 to 10 |
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- S2MPS13: 1 to 10 |
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- S2MPS14: 1 to 5 |
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- S2MPS15: 1 to 10 |
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- S2MPU02: 1 to 7 |
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- Example: BUCK1, BUCK2, BUCK9 |
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Note: The 'n' in LDOn and BUCKn represents the LDO or BUCK number |
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as per the datasheet of device. |
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Optional properties of the nodes under "regulators" sub-node: |
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- regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500, |
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25000 (default) or 50000. |
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Additionally S2MPS11 supports disabling ramp delay for BUCK{2,3,4,6} |
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by setting it to <0>. |
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Note: On S2MPS11 some bucks share the ramp rate setting i.e. same ramp value |
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will be set for a particular group of bucks so provide the same |
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regulator-ramp-delay value for them. |
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Groups sharing ramp rate: |
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- buck{1,6}, |
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- buck{3,4}, |
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- buck{7,8,10}. |
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- samsung,ext-control-gpios: On S2MPS14 the LDO10, LDO11 and LDO12 can be |
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configured to external control over GPIO. To turn this feature on this |
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property must be added to the regulator sub-node: |
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- samsung,ext-control-gpios: GPIO specifier for one GPIO |
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controlling this regulator (enable/disable) |
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Example: |
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LDO12 { |
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regulator-name = "V_EMMC_2.8V"; |
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regulator-min-microvolt = <2800000>; |
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regulator-max-microvolt = <2800000>; |
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samsung,ext-control-gpios = <&gpk0 2 0>; |
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}; |
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Example: |
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s2mps11_pmic@66 { |
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compatible = "samsung,s2mps11-pmic"; |
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reg = <0x66>; |
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regulators { |
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ldo1_reg: LDO1 { |
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regulator-name = "VDD_ABB_3.3V"; |
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regulator-min-microvolt = <3300000>; |
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regulator-max-microvolt = <3300000>; |
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}; |
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ldo2_reg: LDO2 { |
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regulator-name = "VDD_ALIVE_1.1V"; |
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regulator-min-microvolt = <1100000>; |
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regulator-max-microvolt = <1100000>; |
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regulator-always-on; |
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}; |
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buck1_reg: BUCK1 { |
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regulator-name = "vdd_mif"; |
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regulator-min-microvolt = <950000>; |
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regulator-max-microvolt = <1350000>; |
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regulator-always-on; |
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regulator-boot-on; |
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}; |
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buck2_reg: BUCK2 { |
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regulator-name = "vdd_arm"; |
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regulator-min-microvolt = <950000>; |
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regulator-max-microvolt = <1350000>; |
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regulator-always-on; |
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regulator-boot-on; |
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regulator-ramp-delay = <50000>; |
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}; |
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}; |
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};
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