Kernel-4.18.0-80.el8_max77686

Binding for Maxim MAX77686 regulators

This is a part of the device tree bindings of MAX77686 multi-function device.
More information can be found in ../mfd/max77686.txt file.

The MAX77686 PMIC has 9 high-efficiency Buck and 26 Low-DropOut (LDO)
regulators that can be controlled over I2C.

Following properties should be present in main device node of the MFD chip.

Optional node:

• voltage-regulators : The regulators of max77686 have to be instantiated
  under subnode named “voltage-regulators” using the following format.

  regulator_name {

    regulator-compatible = LDOn/BUCKn
    standard regulator constraints....
  

  };
  refer Documentation/devicetree/bindings/regulator/regulator.txt

  The regulator node’s name should be initialized with a string
  to get matched with their hardware counterparts as follow:

  -LDOn : for LDOs, where n can lie in range 1 to 26.

        example: LDO1, LDO2, LDO26.
  

  -BUCKn : for BUCKs, where n can lie in range 1 to 9.

        example: BUCK1, BUCK5, BUCK9.
  

  Regulators which can be turned off during system suspend:
  -LDOn : 2, 6-8, 10-12, 14-16,
  -BUCKn : 1-4.
  Use standard regulator bindings for it (‘regulator-off-in-suspend’).

  LDO20, LDO21, LDO22, BUCK8 and BUCK9 can be configured to GPIO enable
  control. To turn this feature on this property must be added to the regulator
  sub-node:

  • maxim,ena-gpios : one GPIO specifier enable control (the gpio

          flags are actually ignored and always
          ACTIVE_HIGH is used)
    

Example:

max77686: pmic@9 {
    compatible = "maxim,max77686";
    interrupt-parent = <&wakeup_eint>;
    interrupts = <26 IRQ_TYPE_NONE>;
    reg = <0x09>;

    voltage-regulators {
        ldo11_reg: LDO11 {
            regulator-name = "vdd_ldo11";
            regulator-min-microvolt = <1900000>;
            regulator-max-microvolt = <1900000>;
            regulator-always-on;
        };

        buck1_reg: BUCK1 {
            regulator-name = "vdd_mif";
            regulator-min-microvolt = <950000>;
            regulator-max-microvolt = <1300000>;
            regulator-always-on;
            regulator-boot-on;
        };

        buck9_reg: BUCK9 {
            regulator-name = "CAM_ISP_CORE_1.2V";
            regulator-min-microvolt = <1000000>;
            regulator-max-microvolt = <1200000>;
            maxim,ena-gpios = <&gpm0 3 GPIO_ACTIVE_HIGH>;
        };
};