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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
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treea94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/devicetree/bindings/net/nfc/trf7970a.txt
parentInitial commit. (diff)
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Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+* 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>;
+ };
+};