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 (<= 4000000).
   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 - ese-present: Specifies that an ese is physically connected to the nfc
  14 controller.
  15 - uicc-present: Specifies that the uicc swp signal can be physically
  16 connected to the nfc controller.
  17
  18 Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
  19
  20 &mcspi4 {
  21
  22
  23         st21nfcb: st21nfcb@0 {
  24
  25                 compatible = "st,st21nfcb-spi";
  26
  27                 clock-frequency = <4000000>;
  28
  29                 interrupt-parent = <&gpio5>;
  30                 interrupts = <2 IRQ_TYPE_EDGE_RISING>;
  31
  32                 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
  33
  34                 ese-present;
  35                 uicc-present;
  36         };
  37 };