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Diffstat (limited to 'Documentation/devicetree/bindings/spi/spi-gpio.yaml')
| -rw-r--r-- | Documentation/devicetree/bindings/spi/spi-gpio.yaml | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-gpio.yaml b/Documentation/devicetree/bindings/spi/spi-gpio.yaml new file mode 100644 index 0000000000..9ce1df93d4 --- /dev/null +++ b/Documentation/devicetree/bindings/spi/spi-gpio.yaml @@ -0,0 +1,74 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/spi/spi-gpio.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: SPI-GPIO + +maintainers: + - Rob Herring <robh@kernel.org> + +description: + This represents a group of 3-n GPIO lines used for bit-banged SPI on + dedicated GPIO lines. + +allOf: + - $ref: /schemas/spi/spi-controller.yaml# + +properties: + compatible: + const: spi-gpio + + sck-gpios: + description: GPIO spec for the SCK line to use + maxItems: 1 + + miso-gpios: + description: GPIO spec for the MISO line to use + maxItems: 1 + + mosi-gpios: + description: GPIO spec for the MOSI line to use + maxItems: 1 + + cs-gpios: + description: GPIOs to use for chipselect lines. + Not needed if num-chipselects = <0>. + minItems: 1 + maxItems: 1024 + + num-chipselects: + description: Number of chipselect lines. Should be <0> if a single device + with no chip select is connected. + $ref: /schemas/types.yaml#/definitions/uint32 + + # Deprecated properties + gpio-sck: false + gpio-miso: false + gpio-mosi: false + +required: + - compatible + - num-chipselects + - sck-gpios + +unevaluatedProperties: false + +examples: + - | + spi { + compatible = "spi-gpio"; + #address-cells = <0x1>; + #size-cells = <0x0>; + + sck-gpios = <&gpio 95 0>; + miso-gpios = <&gpio 98 0>; + mosi-gpios = <&gpio 97 0>; + cs-gpios = <&gpio 125 0>; + num-chipselects = <1>; + + /* clients */ + }; + +... |