Documentation/devicetree/bindings/net/nfc/st-nci-spi.txt

   1 * STMicroelectronics SAS. ST NCI NFC Controller
   2
   3 Required properties:
   4 - compatible: Should be "st,st21nfcb-spi"
   5 - spi-max-frequency: Maximum SPI frequency (<= 10000000).
   6 - interrupt-parent: phandle for the interrupt gpio controller
   7 - interrupts: GPIO interrupt to which the chip is connected
   8 - reset-gpios: Output GPIO pin used to reset the ST21NFCB
   9
  10 Optional SoC Specific Properties:
  11 - pinctrl-names: Contains only one value - "default".
  12 - pintctrl-0: Specifies the pin control groups used for this controller.
  13
  14 Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
  15
  16 &mcspi4 {
  17
  18         status = "okay";
  19
  20         st21nfcb: st21nfcb@0 {
  21
  22                 compatible = "st,st21nfcb-spi";
  23
  24                 clock-frequency = <4000000>;
  25
  26                 interrupt-parent = <&gpio5>;
  27                 interrupts = <2 IRQ_TYPE_EDGE_RISING>;
  28
  29                 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
  30         };
  31 };