Kernel-4.18.0-80.el8_samsung,s2mps11

Binding for Samsung S2M family regulator block

This is a part of device tree bindings for S2M family multi-function devices.
More information can be found in bindings/mfd/sec-core.txt file.

The S2MPS11/13/14/15 and S2MPU02 devices provide buck and LDO regulators.

To register these with regulator framework instantiate under main device node
a sub-node named “regulators” with more sub-nodes for each regulator using the
common regulator binding documented in:

• Documentation/devicetree/bindings/regulator/regulator.txt

Names of regulators supported by different devices:
- LDOn
- valid values for n are:
- S2MPS11: 1 to 38
- S2MPS13: 1 to 40
- S2MPS14: 1 to 25
- S2MPS15: 1 to 27
- S2MPU02: 1 to 28
- Example: LDO1, LDO2, LDO28
- BUCKn
- valid values for n are:
- S2MPS11: 1 to 10
- S2MPS13: 1 to 10
- S2MPS14: 1 to 5
- S2MPS15: 1 to 10
- S2MPU02: 1 to 7
- Example: BUCK1, BUCK2, BUCK9
Note: The ‘n’ in LDOn and BUCKn represents the LDO or BUCK number
as per the datasheet of device.

Optional properties of the nodes under “regulators” sub-node:

• regulator-ramp-delay: ramp delay in uV/us. May be 6250, 12500,
  25000 (default) or 50000.

  Additionally S2MPS11 supports disabling ramp delay for BUCK{2,3,4,6}
  by setting it to <0>.

  Note: On S2MPS11 some bucks share the ramp rate setting i.e. same ramp value
  will be set for a particular group of bucks so provide the same
  regulator-ramp-delay value for them.
  Groups sharing ramp rate:

  • buck{1,6},
  • buck{3,4},
  • buck{7,8,10}.

• samsung,ext-control-gpios: On S2MPS14 the LDO10, LDO11 and LDO12 can be
  configured to external control over GPIO. To turn this feature on this
  property must be added to the regulator sub-node:

  • samsung,ext-control-gpios: GPIO specifier for one GPIO

                           controlling this regulator (enable/disable)
    

    Example:
    LDO12 {
    regulator-name = “V_EMMC_2.8V”;
    regulator-min-microvolt = <2800000>;
    regulator-max-microvolt = <2800000>;
    samsung,ext-control-gpios = <&gpk0 2 0>;
    };

Example:

s2mps11_pmic@66 {
    compatible = "samsung,s2mps11-pmic";
    reg = <0x66>;

    regulators {
        ldo1_reg: LDO1 {
            regulator-name = "VDD_ABB_3.3V";
            regulator-min-microvolt = <3300000>;
            regulator-max-microvolt = <3300000>;
        };

        ldo2_reg: LDO2 {
            regulator-name = "VDD_ALIVE_1.1V";
            regulator-min-microvolt = <1100000>;
            regulator-max-microvolt = <1100000>;
            regulator-always-on;
        };

        buck1_reg: BUCK1 {
            regulator-name = "vdd_mif";
            regulator-min-microvolt = <950000>;
            regulator-max-microvolt = <1350000>;
            regulator-always-on;
            regulator-boot-on;
        };

        buck2_reg: BUCK2 {
            regulator-name = "vdd_arm";
            regulator-min-microvolt = <950000>;
            regulator-max-microvolt = <1350000>;
            regulator-always-on;
            regulator-boot-on;
            regulator-ramp-delay = <50000>;
        };
    };
};