dt: bindings: drm: xilinx: Help for Xilinx UHDSDI Tx driver

This patch adds the documentation for xilinx UHDSDI Tx driver

Signed-off-by: Saurabh Sengar <saurabhs@xilinx.com>
Reviewed-by: Hyun Kwon <hyun.kwon@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/Documentation/devicetree/bindings/drm/xilinx/sdi.txt b/Documentation/devicetree/bindings/drm/xilinx/sdi.txt
new file mode 100644 (file)
index 0000000..ceb5340
--- /dev/null
+++ b/Documentation/devicetree/bindings/drm/xilinx/sdi.txt
@@ -0,0 +1,34 @@
+Device-Tree bindings for Xilinx SDI Tx IP core
+
+The IP core supports transmission of video data in SDI Tx: protocol.
+
+Required properties:
+ - compatible: Should be "xlnx,v-smpte-uhdsdi-tx-ss".
+ - interrupts: Interrupt number.
+ - interrupts-parent: phandle for interrupt controller.
+ - reg: Base address and size of the IP core.
+ - ports: Connects to the drm device node through device graph binding.
+   The port should contain a 'remote-endpoint' subnode that points to the
+   endpoint in the port of the drm device node. Refer to
+   Documentation/devicetree/bindings/graph.txt.
+ - xlnx,vtc: vtc phandle
+
+Example:
+
+               v_smpte_uhdsdi_tx_ss: v_smpte_uhdsdi_tx_ss@80020000 {
+                       compatible = "xlnx,v-smpte-uhdsdi-tx-ss";
+                       interrupt-parent = <&gic>;
+                       interrupts = <0 90 4>;
+                       reg = <0x0 0x80020000 0x0 0x10000>;
+                       xlnx,vtc = <&v_tc_0>;
+                       ports {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               port@0 {
+                                       reg = <0>;
+                                       sdi_port: endpoint {
+                                               remote-endpoint = <&drm_port>;
+                                       };
+                               };
+                       };
+               };