Documentation/devicetree/bindings/spi/spi-gpio.txt

   1 SPI-GPIO devicetree bindings
   2
   3 Required properties:
   4
   5  - compatible: should be set to "spi-gpio"
   6  - #address-cells: should be set to <0x1>
   7  - ranges
   8  - gpio-sck: GPIO spec for the SCK line to use
   9  - gpio-miso: GPIO spec for the MISO line to use
  10  - gpio-mosi: GPIO spec for the MOSI line to use
  11  - cs-gpios: GPIOs to use for chipselect lines
  12  - num-chipselects: number of chipselect lines
  13
  14 Example:
  15
  16         spi {
  17                 compatible = "spi-gpio";
  18                 #address-cells = <0x1>;
  19                 ranges;
  20
  21                 gpio-sck = <&gpio 95 0>;
  22                 gpio-miso = <&gpio 98 0>;
  23                 gpio-mosi = <&gpio 97 0>;
  24                 cs-gpios = <&gpio 125 0>;
  25                 num-chipselects = <1>;
  26
  27                 /* clients */
  28         };
  29