[PATCH 3/3] NFC: trf7970a: Add DTS Documentation

Mark A. Greer
2014-01-31T22:17:28Z

Describe the properies used by the trf7970a
RFID/NFC/15693 transceiver driver.

Signed-off-by: Mark A. Greer <mgreer@animalcreek.com>
---
.../devicetree/bindings/net/nfc/trf7970a.txt | 37 ++++++++++++++++++++++
1 file changed, 37 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/nfc/trf7970a.txt

diff --git a/Documentation/devicetree/bindings/net/nfc/trf7970a.txt b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt
new file mode 100644
index 0000000..4256893
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/trf7970a.txt
@@ -0,0 +1,37 @@
+* Texas Instruments TRF7970A RFID/NFC/15693 Transceiver
+
+Required properties:
+- compatible: Should be "ti,trf7970a".
+- spi-max-frequency: Maximum SPI frequency (<= 2000000).
+- interrupt-parent: phandle of parent interrupt handler.
+- interrupts: A single interrupt specifier.
+- ti,enable-gpios: Two GPIO entries used for 'EN' and 'EN2' pins on the
+ TRF7970A.
+
+Optional properties:
+- ti,ss-gpio: GPIO used for Slave Select pin on TRF7970A. Its presence
+ indicates that "SPI with SS mode" is used by the TRF7970A.
+
+Optional SoC Specific Properties:
+- pinctrl-names: Contains only one value - "default".
+- pintctrl-0: Specifies the pin control groups used for this controller.
+
+Example (for ARM-based BeagleBone with TRF7970A on SPI1):
+
+&spi1 {
+ status = "okay";
+
+ 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_LOW>,
+ <&gpio2 5 GPIO_ACTIVE_LOW>;
+ ti,ss-gpio = <&gpio1 30 GPIO_ACTIVE_LOW>;
+ status = "okay";
+ };
+};
--
1.8.3.4