80 lines
2.2 KiB
Plaintext
80 lines
2.2 KiB
Plaintext
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Binding for Samsung S2MPA01 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 S2MPA01 device 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 S2MPA01 device:
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- LDOn
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- valid values for n are 1 to 26
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- Example: LDO1, LD02, LDO26
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- BUCKn
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- valid values for n are 1 to 10.
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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 buck regulator 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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(default), 25000, or 50000. May be 0 for disabling the ramp delay on
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BUCK{1,2,3,4}.
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In the absence of the regulator-ramp-delay property, the default ramp
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delay will be used.
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Note: 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{2,4},
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- buck{8,9,10}.
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Example:
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s2mpa01_pmic@66 {
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compatible = "samsung,s2mpa01-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_ALIVE";
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regulator-min-microvolt = <1000000>;
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regulator-max-microvolt = <1000000>;
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};
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ldo2_reg: LDO2 {
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regulator-name = "VDDQ_MMC2";
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regulator-min-microvolt = <2800000>;
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regulator-max-microvolt = <2800000>;
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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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