mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-20 09:34:44 +08:00
392cc0a4a0
This is same scheme as fixed-regulator. Without that property used, the parent regulator can be shut down (if not an always on). Thus leading to inappropriate behavior: On am62-SP-SK this fix is required to avoid tps65219 ldo1 (SDMMC rail) to be shut down after boot completion. Signed-off-by: Jerome Neanne <jneanne@baylibre.com> Link: https://lore.kernel.org/r/20220929132526.29427-3-jneanne@baylibre.com Signed-off-by: Mark Brown <broonie@kernel.org>
121 lines
3.1 KiB
YAML
121 lines
3.1 KiB
YAML
# 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
|
|
|
|
vin-supply:
|
|
description: Input supply phandle.
|
|
|
|
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;
|
|
};
|
|
...
|