51 lines
1.2 KiB
YAML
51 lines
1.2 KiB
YAML
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# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/gpio/rockchip,rk3328-grf-gpio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip RK3328 General Register Files GPIO controller
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description:
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The Rockchip RK3328 General Register File (GRF) outputs only the
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GPIO_MUTE pin, originally for codec mute control, but it can also be used
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for general purpose. It is manipulated by the GRF_SOC_CON10 register.
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If needed in the future support for the HDMI pins can also be added.
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The GPIO node should be declared as the child of the GRF node.
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The GPIO_MUTE pin is referred to in the format
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<&grf_gpio 0 GPIO_ACTIVE_LOW>
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The first cell is the pin number and
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the second cell is used to specify the GPIO polarity
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0 = Active high
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1 = Active low
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maintainers:
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- Heiko Stuebner <heiko@sntech.de>
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properties:
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compatible:
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const: rockchip,rk3328-grf-gpio
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gpio-controller: true
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"#gpio-cells":
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const: 2
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required:
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- compatible
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- gpio-controller
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- "#gpio-cells"
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additionalProperties: false
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examples:
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- |
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grf_gpio: gpio {
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compatible = "rockchip,rk3328-grf-gpio";
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gpio-controller;
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#gpio-cells = <2>;
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};
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