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 - interrupts: GPIO interrupt to which the chip is connected
   7 - reset-gpios: Output GPIO pin used to reset the ST21NFCB
   8
   9 Optional SoC Specific Properties:
  10 - pinctrl-names: Contains only one value - "default".
  11 - pintctrl-0: Specifies the pin control groups used for this controller.
  12 - ese-present: Specifies that an ese is physically connected to the nfc
  13 controller.
  14 - uicc-present: Specifies that the uicc swp signal can be physically
  15 connected to the nfc controller.
  16
  17 Example (for ARM-based BeagleBoard xM with ST21NFCB on SPI4):
  18
  19 &mcspi4 {
  20
  21
  22         st21nfcb: st21nfcb@0 {
  23
  24                 compatible = "st,st21nfcb-spi";
  25
  26                 clock-frequency = <4000000>;
  27
  28                 interrupt-parent = <&gpio5>;
  29                 interrupts = <2 IRQ_TYPE_EDGE_RISING>;
  30
  31                 reset-gpios = <&gpio5 29 GPIO_ACTIVE_HIGH>;
  32
  33                 ese-present;
  34                 uicc-present;
  35         };
  36 };