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3d21a46093
json-schema versions draft7 and earlier have a weird behavior in that any keywords combined with a '$ref' are ignored (silently). The correct form was to put a '$ref' under an 'allOf'. This behavior is now changed in the 2019-09 json-schema spec and '$ref' can be mixed with other keywords. The json-schema library doesn't yet support this, but the tooling now does a fixup for this and either way works. This has been a constant source of review comments, so let's change this treewide so everyone copies the simpler syntax. Scripted with ruamel.yaml with some manual fixups. Some minor whitespace changes from the script. Signed-off-by: Rob Herring <robh@kernel.org> Acked-by: Maxime Ripard <mripard@kernel.org> Acked-by: Lee Jones <lee.jones@linaro.org> Acked-By: Vinod Koul <vkoul@kernel.org> Acked-by: Mark Brown <broonie@kernel.org> Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Acked-by: Wolfram Sang <wsa@the-dreams.de> # for I2C Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> #for-iio Reviewed-by: Stephen Boyd <sboyd@kernel.org> # clock Signed-off-by: Rob Herring <robh@kernel.org>
115 lines
3 KiB
YAML
115 lines
3 KiB
YAML
# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/regulator/gpio-regulator.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GPIO controlled regulators
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maintainers:
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- Liam Girdwood <lgirdwood@gmail.com>
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- Mark Brown <broonie@kernel.org>
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description:
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Any property defined as part of the core regulator binding, defined in
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regulator.txt, can also be used.
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allOf:
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- $ref: "regulator.yaml#"
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properties:
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compatible:
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const: regulator-gpio
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regulator-name: true
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enable-gpios:
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description: GPIO to use to enable/disable the regulator.
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Warning, the GPIO phandle flags are ignored and the GPIO polarity is
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controlled solely by the presence of "enable-active-high" DT property.
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This is due to compatibility with old DTs.
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maxItems: 1
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gpios:
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description: Array of one or more GPIO pins used to select the regulator
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voltage/current listed in "states".
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minItems: 1
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maxItems: 8 # Should be enough...
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gpios-states:
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description: |
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On operating systems, that don't support reading back gpio values in
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output mode (most notably linux), this array provides the state of GPIO
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pins set when requesting them from the gpio controller. Systems, that are
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capable of preserving state when requesting the lines, are free to ignore
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this property.
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0: LOW
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1: HIGH
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Default is LOW if nothing else is specified.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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maxItems: 8
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items:
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enum: [0, 1]
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default: 0
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states:
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description: Selection of available voltages/currents provided by this
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regulator and matching GPIO configurations to achieve them. If there are
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no states in the "states" array, use a fixed regulator instead.
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$ref: /schemas/types.yaml#/definitions/uint32-matrix
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maxItems: 8
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items:
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items:
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- description: Voltage in microvolts
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- description: GPIO group state value
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startup-delay-us:
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description: startup time in microseconds
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enable-active-high:
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description: Polarity of "enable-gpio" GPIO is active HIGH. Default is
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active LOW.
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type: boolean
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gpio-open-drain:
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description:
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GPIO is open drain type. If this property is missing then default
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assumption is false.
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type: boolean
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regulator-type:
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description: Specifies what is being regulated.
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$ref: /schemas/types.yaml#/definitions/string
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enum:
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- voltage
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- current
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default: voltage
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required:
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- compatible
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- regulator-name
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- gpios
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- states
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examples:
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- |
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gpio-regulator {
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compatible = "regulator-gpio";
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regulator-name = "mmci-gpio-supply";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <2600000>;
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regulator-boot-on;
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enable-gpios = <&gpio0 23 0x4>;
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gpios = <&gpio0 24 0x4
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&gpio0 25 0x4>;
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states = <1800000 0x3>,
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<2200000 0x2>,
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<2600000 0x1>,
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<2900000 0x0>;
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startup-delay-us = <100000>;
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enable-active-high;
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};
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...
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