75 lines
1.5 KiB
YAML
75 lines
1.5 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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$id: http://devicetree.org/schemas/spi/spi-gpio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: SPI-GPIO devicetree bindings
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maintainers:
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- Rob Herring <robh@kernel.org>
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description:
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This represents a group of 3-n GPIO lines used for bit-banged SPI on
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dedicated GPIO lines.
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allOf:
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- $ref: "/schemas/spi/spi-controller.yaml#"
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properties:
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compatible:
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const: spi-gpio
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sck-gpios:
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description: GPIO spec for the SCK line to use
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maxItems: 1
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miso-gpios:
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description: GPIO spec for the MISO line to use
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maxItems: 1
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mosi-gpios:
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description: GPIO spec for the MOSI line to use
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maxItems: 1
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cs-gpios:
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description: GPIOs to use for chipselect lines.
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Not needed if num-chipselects = <0>.
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minItems: 1
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maxItems: 1024
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num-chipselects:
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description: Number of chipselect lines. Should be <0> if a single device
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with no chip select is connected.
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$ref: "/schemas/types.yaml#/definitions/uint32"
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# Deprecated properties
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gpio-sck: false
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gpio-miso: false
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gpio-mosi: false
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required:
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- compatible
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- num-chipselects
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- sck-gpios
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unevaluatedProperties: false
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examples:
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- |
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spi {
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compatible = "spi-gpio";
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#address-cells = <0x1>;
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#size-cells = <0x0>;
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sck-gpios = <&gpio 95 0>;
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miso-gpios = <&gpio 98 0>;
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mosi-gpios = <&gpio 97 0>;
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cs-gpios = <&gpio 125 0>;
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num-chipselects = <1>;
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/* clients */
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};
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...
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