1*4882a593Smuzhiyun* Texas Instruments TRF7970A RFID/NFC/15693 Transceiver 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunRequired properties: 4*4882a593Smuzhiyun- compatible: Should be "ti,trf7970a". 5*4882a593Smuzhiyun- spi-max-frequency: Maximum SPI frequency (<= 2000000). 6*4882a593Smuzhiyun- interrupts: A single interrupt specifier. 7*4882a593Smuzhiyun- ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' pins on the 8*4882a593Smuzhiyun TRF7970A. EN2 is optional. 9*4882a593Smuzhiyun- vin-supply: Regulator for supply voltage to VIN pin 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunOptional SoC Specific Properties: 12*4882a593Smuzhiyun- pinctrl-names: Contains only one value - "default". 13*4882a593Smuzhiyun- pintctrl-0: Specifies the pin control groups used for this controller. 14*4882a593Smuzhiyun- autosuspend-delay: Specify autosuspend delay in milliseconds. 15*4882a593Smuzhiyun- irq-status-read-quirk: Specify that the trf7970a being used has the 16*4882a593Smuzhiyun "IRQ Status Read" erratum. 17*4882a593Smuzhiyun- en2-rf-quirk: Specify that the trf7970a being used has the "EN2 RF" 18*4882a593Smuzhiyun erratum. 19*4882a593Smuzhiyun- vdd-io-supply: Regulator specifying voltage for vdd-io 20*4882a593Smuzhiyun- clock-frequency: Set to specify that the input frequency to the trf7970a is 13560000Hz or 27120000Hz 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunExample (for ARM-based BeagleBone with TRF7970A on SPI1): 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun&spi1 { 25*4882a593Smuzhiyun 26*4882a593Smuzhiyun nfc@0 { 27*4882a593Smuzhiyun compatible = "ti,trf7970a"; 28*4882a593Smuzhiyun reg = <0>; 29*4882a593Smuzhiyun pinctrl-names = "default"; 30*4882a593Smuzhiyun pinctrl-0 = <&trf7970a_default>; 31*4882a593Smuzhiyun spi-max-frequency = <2000000>; 32*4882a593Smuzhiyun interrupt-parent = <&gpio2>; 33*4882a593Smuzhiyun interrupts = <14 0>; 34*4882a593Smuzhiyun ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_HIGH>, 35*4882a593Smuzhiyun <&gpio2 5 GPIO_ACTIVE_HIGH>; 36*4882a593Smuzhiyun vin-supply = <&ldo3_reg>; 37*4882a593Smuzhiyun vdd-io-supply = <&ldo2_reg>; 38*4882a593Smuzhiyun autosuspend-delay = <30000>; 39*4882a593Smuzhiyun irq-status-read-quirk; 40*4882a593Smuzhiyun en2-rf-quirk; 41*4882a593Smuzhiyun clock-frequency = <27120000>; 42*4882a593Smuzhiyun }; 43*4882a593Smuzhiyun}; 44