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# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/regulator/gpio-regulator.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: GPIO controlled regulators
maintainers:
- Liam Girdwood <lgirdwood@gmail.com>
- Mark Brown <broonie@kernel.org>
description:
Any property defined as part of the core regulator binding, defined in
regulator.txt, can also be used.
allOf:
- $ref: "regulator.yaml#"
properties:
compatible:
const: regulator-gpio
regulator-name: true
enable-gpios:
description: GPIO to use to enable/disable the regulator.
Warning, the GPIO phandle flags are ignored and the GPIO polarity is
controlled solely by the presence of "enable-active-high" DT property.
This is due to compatibility with old DTs.
maxItems: 1
gpios:
description: Array of one or more GPIO pins used to select the regulator
voltage/current listed in "states".
minItems: 1
maxItems: 8 # Should be enough...
gpios-states:
description: |
On operating systems, that don't support reading back gpio values in
output mode (most notably linux), this array provides the state of GPIO
pins set when requesting them from the gpio controller. Systems, that are
capable of preserving state when requesting the lines, are free to ignore
this property.
0: LOW
1: HIGH
Default is LOW if nothing else is specified.
$ref: /schemas/types.yaml#/definitions/uint32-array
maxItems: 8
items:
enum: [0, 1]
default: 0
states:
description: Selection of available voltages/currents provided by this
regulator and matching GPIO configurations to achieve them. If there are
no states in the "states" array, use a fixed regulator instead.
$ref: /schemas/types.yaml#/definitions/uint32-matrix
maxItems: 8
items:
items:
- description: Voltage in microvolts
- description: GPIO group state value
startup-delay-us:
description: startup time in microseconds
enable-active-high:
description: Polarity of "enable-gpio" GPIO is active HIGH. Default is
active LOW.
type: boolean
gpio-open-drain:
description:
GPIO is open drain type. If this property is missing then default
assumption is false.
type: boolean
regulator-type:
description: Specifies what is being regulated.
$ref: /schemas/types.yaml#/definitions/string
enum:
- voltage
- current
default: voltage
required:
- compatible
- regulator-name
- gpios
- states
unevaluatedProperties: false
examples:
- |
gpio-regulator {
compatible = "regulator-gpio";
regulator-name = "mmci-gpio-supply";
regulator-min-microvolt = <1800000>;
regulator-max-microvolt = <2600000>;
regulator-boot-on;
enable-gpios = <&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;
};
...
|
