kernel/Documentation/devicetree/bindings/net/nfc/pn544.txt

   1 * NXP Semiconductors PN544 NFC Controller
   2
   3 Required properties:
   4 - compatible: Should be "nxp,pn544-i2c".
   5 - clock-frequency: I²C work frequency.
   6 - reg: address on the bus
   7 - interrupt-parent: phandle for the interrupt gpio controller
   8 - interrupts: GPIO interrupt to which the chip is connected
   9 - enable-gpios: Output GPIO pin used for enabling/disabling the PN544
  10 - firmware-gpios: Output GPIO pin used to enter firmware download mode
  11
  12 Optional SoC Specific Properties:
  13 - pinctrl-names: Contains only one value - "default".
  14 - pintctrl-0: Specifies the pin control groups used for this controller.
  15
  16 Example (for ARM-based BeagleBone with PN544 on I2C2):
  17
  18 &i2c2 {
  19
  20         status = "okay";
  21
  22         pn544: pn544@28 {
  23
  24                 compatible = "nxp,pn544-i2c";
  25
  26                 reg = <0x28>;
  27                 clock-frequency = <400000>;
  28
  29                 interrupt-parent = <&gpio1>;
  30                 interrupts = <17 GPIO_ACTIVE_HIGH>;
  31
  32                 enable-gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
  33                 firmware-gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;
  34         };
  35 };