1 GPIO controlled regulators
4 - compatible : Must be "regulator-gpio".
5 - states : Selection of available voltages and GPIO configs.
6 if there are no states, then use a fixed regulator
9 - enable-gpio : GPIO to use to enable/disable the regulator.
10 - gpios : GPIO group used to control voltage.
11 - gpios-states : gpios pin's initial states array. 0: LOW, 1: HIGH.
12 defualt is LOW if nothing is specified.
13 - startup-delay-us : Startup time in microseconds.
14 - enable-active-high : Polarity of GPIO is active high (default is low).
16 Any property defined as part of the core regulator binding defined in
17 regulator.txt can also be used.
21 mmciv: gpio-regulator {
22 compatible = "regulator-gpio";
24 regulator-name = "mmci-gpio-supply";
25 regulator-min-microvolt = <1800000>;
26 regulator-max-microvolt = <2600000>;
29 enable-gpio = <&gpio0 23 0x4>;
30 gpios = <&gpio0 24 0x4
37 startup-delay-us = <100000>;