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Traditionally, firmware will provide a GPIO interface or a pin control interface. However, the SCMI protocol provides a generic pin control interface and the GPIO support is built on top of that using the normal pin control interfaces. Potentially, other firmware will adopt a similar generic approach in the future. Document how to configure the GPIO device. Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Linus Walleij <linusw@kernel.org> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com> Signed-off-by: Linus Walleij <linusw@kernel.org>
60 lines
1.2 KiB
YAML
60 lines
1.2 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/gpio/pin-control-gpio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Pin control based generic GPIO controller
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description:
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The pin control-based GPIO will facilitate a pin controller's ability
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to drive electric lines high/low and other generic properties of a
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pin controller to perform general-purpose one-bit binary I/O.
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maintainers:
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- Dan Carpenter <dan.carpenter@linaro.org>
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properties:
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compatible:
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const: scmi-pinctrl-gpio
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gpio-controller: true
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"#gpio-cells":
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const: 2
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gpio-line-names: true
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gpio-ranges: true
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ngpios: true
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patternProperties:
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"^.+-hog(-[0-9]+)?$":
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type: object
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required:
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- gpio-hog
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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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- gpio-ranges
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- ngpios
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additionalProperties: false
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examples:
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- |
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gpio {
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compatible = "scmi-pinctrl-gpio";
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gpio-controller;
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#gpio-cells = <2>;
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ngpios = <4>;
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gpio-line-names = "gpio_5_17", "gpio_5_20", "gpio_5_22", "gpio_2_1";
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gpio-ranges = <&scmi_pinctrl 0 30 4>;
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pinctrl-names = "default";
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pinctrl-0 = <&keys_pins>;
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};
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