Kernel-3.10.0-957.el7_gpio-regulator

GPIO controlled regulators

Required properties:

• compatible : Must be “regulator-gpio”.
• states : Selection of available voltages and GPIO configs.

                      if there are no states, then use a fixed regulator
  

Optional properties:

• enable-gpio : GPIO to use to enable/disable the regulator.
• gpios : GPIO group used to control voltage.
• startup-delay-us : Startup time in microseconds.
• enable-active-high : Polarity of GPIO is active high (default is low).

Any property defined as part of the core regulator binding defined in
regulator.txt can also be used.

Example:

mmciv: gpio-regulator {
    compatible = "regulator-gpio";

    regulator-name = "mmci-gpio-supply";
    regulator-min-microvolt = <1800000>;
    regulator-max-microvolt = <2600000>;
    regulator-boot-on;

    enable-gpio = <&gpio0 23 0x4>;
    gpios = <&gpio0 24 0x4
         &gpio0 25 0x4>;
    states = <1800000 0x3
          2200000 0x2
          2600000 0x1
          2900000 0x0>;

    startup-delay-us = <100000>;
    enable-active-high;
};