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74 lines
1.5 KiB
74 lines
1.5 KiB
# 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 <[email protected]> |
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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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