This patch adds ST NFC binding doc that guides
how to make SPI slave node entry of ST NFC transceiver
in DT file of any platform.
Signed-off-by: Shikha Singh <shikha.singh@xxxxxx>
---
.../devicetree/bindings/net/nfc/stnfc.txt | 50 ++++++++++++++++++++++
1 file changed, 50 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/nfc/stnfc.txt
diff --git a/Documentation/devicetree/bindings/net/nfc/stnfc.txt b/Documentation/devicetree/bindings/net/nfc/stnfc.txt
new file mode 100644
index 0000000..b050b3e
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/stnfc.txt
@@ -0,0 +1,50 @@
+* STMicroelectronics : NFC Transceiver
+
+ST NFC Transceiver can be attached with SPI bus.
+ST NFC node should be defined in DT as SPI slave device of SPI
+master with which transceiver is physically connected.
+The properties defined below are required to be the part of DT
+to include ST NFC transceiver over SPI into the platform.
+
+Required properties:
+===================
+- reg: Address of SPI slave "ST NFC transceiver" on SPI master bus.
+
+- compatible: should be "st,stnfc" for ST NFC transceiver
+
+- spi-max-frequency: Max. operating SPI frequency for ST NFC
+ transceiver.
+
+- enable-gpio: GPIO line to enable ST NFC transceiver.
+
+- interrupt-parent : Standard way to specify the controller to which
+ transceiver's interrupt is routed.
+
+- interrupts : Standard way to define ST NFC transceiver's out
+ interrupt.
+
+Optional property:
+=================
+- nfcstvin : This is an optional property. It contains a
+ phandle to ST NFC transceiver's regulator supply node in DT.
+
+Example:
+=======
+spi@9840000 {
+ reg = <0x9840000 0x110>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ cs-gpios = <&pio0 4>;
+ status = "okay";
+
+ stnfc@0{
+ reg = <0>;
+ compatible = "st,stnfc";
+ status = "okay";
+ spi-max-frequency = <1000000>;
+ enable-gpio = <&pio4 0>;
+ interrupt-parent = <&pio0>;
+ interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+ };
+
+};
--
1.8.2.1
