Documentation/devicetree/bindings/spi/efm32-spi.txt

   1 * Energy Micro EFM32 SPI
   2
   3 Required properties:
   4 - #address-cells: see spi-bus.txt
   5 - #size-cells: see spi-bus.txt
   6 - compatible: should be "energymicro,efm32-spi"
   7 - reg: Offset and length of the register set for the controller
   8 - interrupts: pair specifying rx and tx irq
   9 - clocks: phandle to the spi clock
  10 - cs-gpios: see spi-bus.txt
  11
  12 Recommended properties :
  13 - energymicro,location: Value to write to the ROUTE register's LOCATION
  14                         bitfield to configure the pinmux for the device, see
  15                         datasheet for values.
  16                         If this property is not provided, keeping what is
  17                         already configured in the hardware, so its either the
  18                         reset default 0 or whatever the bootloader did.
  19
  20 Example:
  21
  22 spi1: spi@0x4000c400 { /* USART1 */
  23         #address-cells = <1>;
  24         #size-cells = <0>;
  25         compatible = "energymicro,efm32-spi";
  26         reg = <0x4000c400 0x400>;
  27         interrupts = <15 16>;
  28         clocks = <&cmu 20>;
  29         cs-gpios = <&gpio 51 1>; // D3
  30         energymicro,location = <1>;
  31         status = "ok";
  32
  33         ks8851@0 {
  34                 compatible = "ks8851";
  35                 spi-max-frequency = <6000000>;
  36                 reg = <0>;
  37                 interrupt-parent = <&boardfpga>;
  38                 interrupts = <4>;
  39                 status = "ok";
  40         };
  41 };