| 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. |
| - gpios-states : gpios pin's initial states array. 0: LOW, 1: HIGH. |
| defualt is LOW if nothing is specified. |
| - startup-delay-us : Startup time in microseconds. |
| - enable-active-high : Polarity of GPIO is active high (default is low). |
| - regulator-type : Specifies what is being regulated, must be either |
| "voltage" or "current", defaults to voltage. |
| |
| 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; |
| }; |
