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- t5t-rmb-extra-byte-quirk: Specify that the trf7970a has the erratum
22  where an extra byte is returned by Read Multiple Block commands issued
23  to Type 5 tags.
24
25Example (for ARM-based BeagleBone with TRF7970A on SPI1):
26
27&spi1 {
28	status = "okay";
29
30	nfc@0 {
31		compatible = "ti,trf7970a";
32		reg = <0>;
33		pinctrl-names = "default";
34		pinctrl-0 = <&trf7970a_default>;
35		spi-max-frequency = <2000000>;
36		interrupt-parent = <&gpio2>;
37		interrupts = <14 0>;
38		ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_LOW>,
39				  <&gpio2 5 GPIO_ACTIVE_LOW>;
40		vin-supply = <&ldo3_reg>;
41		vin-voltage-override = <5000000>;
42		autosuspend-delay = <30000>;
43		irq-status-read-quirk;
44		en2-rf-quirk;
45		t5t-rmb-extra-byte-quirk;
46		status = "okay";
47	};
48};
49