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