1* Texas Instruments TRF7970A RFID/NFC/15693 Transceiver
2
3Required properties:
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: Two GPIO entries used for 'EN' and 'EN2' pins on the
9  TRF7970A.
10- vin-supply: Regulator for supply voltage to VIN pin
11
12Optional 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- vin-voltage-override: Specify voltage of VIN pin in microvolts.
17- irq-status-read-quirk: Specify that the trf7970a being used has the
18  "IRQ Status Read" erratum.
19- en2-rf-quirk: Specify that the trf7970a being used has the "EN2 RF"
20  erratum.
21
22Example (for ARM-based BeagleBone with TRF7970A on SPI1):
23
24&spi1 {
25	status = "okay";
26
27	nfc@0 {
28		compatible = "ti,trf7970a";
29		reg = <0>;
30		pinctrl-names = "default";
31		pinctrl-0 = <&trf7970a_default>;
32		spi-max-frequency = <2000000>;
33		interrupt-parent = <&gpio2>;
34		interrupts = <14 0>;
35		ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>,
36				  <&gpio2 5 GPIO_ACTIVE_LOW>;
37		vin-supply = <&ldo3_reg>;
38		vin-voltage-override = <5000000>;
39		autosuspend-delay = <30000>;
40		irq-status-read-quirk;
41		en2-rf-quirk;
42		status = "okay";
43	};
44};
45