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103 lines
2.9 KiB
Plaintext
103 lines
2.9 KiB
Plaintext
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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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