| * Texas Instruments TRF7970A RFID/NFC/15693 Transceiver |
| |
| Required properties: |
| - compatible: Should be "ti,trf7970a". |
| - spi-max-frequency: Maximum SPI frequency (<= 2000000). |
| - interrupts: A single interrupt specifier. |
| - ti,enable-gpios: One or two GPIO entries used for 'EN' and 'EN2' pins on the |
| TRF7970A. EN2 is optional. |
| - vin-supply: Regulator for supply voltage to VIN pin |
| |
| Optional SoC Specific Properties: |
| - pinctrl-names: Contains only one value - "default". |
| - pintctrl-0: Specifies the pin control groups used for this controller. |
| - autosuspend-delay: Specify autosuspend delay in milliseconds. |
| - irq-status-read-quirk: Specify that the trf7970a being used has the |
| "IRQ Status Read" erratum. |
| - en2-rf-quirk: Specify that the trf7970a being used has the "EN2 RF" |
| erratum. |
| - vdd-io-supply: Regulator specifying voltage for vdd-io |
| - clock-frequency: Set to specify that the input frequency to the trf7970a is 13560000Hz or 27120000Hz |
| |
| Example (for ARM-based BeagleBone with TRF7970A on SPI1): |
| |
| &spi1 { |
| |
| nfc@0 { |
| compatible = "ti,trf7970a"; |
| reg = <0>; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&trf7970a_default>; |
| spi-max-frequency = <2000000>; |
| interrupt-parent = <&gpio2>; |
| interrupts = <14 0>; |
| ti,enable-gpios = <&gpio2 2 GPIO_ACTIVE_HIGH>, |
| <&gpio2 5 GPIO_ACTIVE_HIGH>; |
| vin-supply = <&ldo3_reg>; |
| vdd-io-supply = <&ldo2_reg>; |
| autosuspend-delay = <30000>; |
| irq-status-read-quirk; |
| en2-rf-quirk; |
| clock-frequency = <27120000>; |
| }; |
| }; |
