1 * Texas Instruments TRF7970A RFID/NFC/15693 Transceiver
4 - compatible: Should be "ti,trf7970a".
5 - spi-max-frequency: Maximum SPI frequency (<= 2000000).
6 - interrupt-parent: phandle of parent interrupt handler.
7 - interrupts: A single interrupt specifier.
8 - ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' pins on the
9 TRF7970A. EN2 is optional.
10 - vin-supply: Regulator for supply voltage to VIN pin
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 - autosuspend-delay: Specify autosuspend delay in milliseconds.
16 - irq-status-read-quirk: Specify that the trf7970a being used has the
17 "IRQ Status Read" erratum.
18 - en2-rf-quirk: Specify that the trf7970a being used has the "EN2 RF"
20 - vdd-io-supply: Regulator specifying voltage for vdd-io
21 - clock-frequency: Set to specify that the input frequency to the trf7970a is 13560000Hz or 27120000Hz
23 Example (for ARM-based BeagleBone with TRF7970A on SPI1):
28 compatible = "ti,trf7970a";
30 pinctrl-names = "default";
31 pinctrl-0 = <&trf7970a_default>;
32 spi-max-frequency = <2000000>;
33 interrupt-parent = <&gpio2>;
35 ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_HIGH>,
36 <&gpio2 5 GPIO_ACTIVE_HIGH>;
37 vin-supply = <&ldo3_reg>;
38 vdd-io-supply = <&ldo2_reg>;
39 autosuspend-delay = <30000>;
40 irq-status-read-quirk;
42 clock-frequency = <27120000>;