spi-gpio.yaml

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    1 # SPDX-License-Identifier: GPL-2.0
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/spi/spi-gpio.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: SPI-GPIO devicetree bindings
    8 
    9 maintainers:
   10   - Rob Herring <robh@kernel.org>
   11 
   12 description:
   13   This represents a group of 3-n GPIO lines used for bit-banged SPI on
   14   dedicated GPIO lines.
   15 
   16 allOf:
   17   - $ref: "/schemas/spi/spi-controller.yaml#"
   18 
   19 properties:
   20   compatible:
   21     const: spi-gpio
   22 
   23   sck-gpios:
   24     description: GPIO spec for the SCK line to use
   25     maxItems: 1
   26 
   27   miso-gpios:
   28     description: GPIO spec for the MISO line to use
   29     maxItems: 1
   30 
   31   mosi-gpios:
   32     description: GPIO spec for the MOSI line to use
   33     maxItems: 1
   34 
   35   cs-gpios:
   36     description: GPIOs to use for chipselect lines.
   37       Not needed if num-chipselects = <0>.
   38     minItems: 1
   39     maxItems: 1024
   40 
   41   num-chipselects:
   42     description: Number of chipselect lines. Should be <0> if a single device
   43       with no chip select is connected.
   44     $ref: "/schemas/types.yaml#/definitions/uint32"
   45 
   46   # Deprecated properties
   47   gpio-sck: false
   48   gpio-miso: false
   49   gpio-mosi: false
   50 
   51 required:
   52   - compatible
   53   - num-chipselects
   54   - sck-gpios
   55 
   56 unevaluatedProperties: false
   57 
   58 examples:
   59   - |
   60     spi {
   61       compatible = "spi-gpio";
   62       #address-cells = <0x1>;
   63       #size-cells = <0x0>;
   64 
   65       sck-gpios = <&gpio 95 0>;
   66       miso-gpios = <&gpio 98 0>;
   67       mosi-gpios = <&gpio 97 0>;
   68       cs-gpios = <&gpio 125 0>;
   69       num-chipselects = <1>;
   70 
   71       /* clients */
   72     };
   73 
   74 ...

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/spi/spi-gpio.yaml

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/spi/spi-gpio.yaml