spi: xilinx: Add devicetree binding for spi-xilinx

Add a binding document for the spi/spi-xilinx

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/spi/spi-xilinx.txt b/Documentation/devicetree/bindings/spi/spi-xilinx.txt
new file mode 100644
index 000000000000..c7b7856bd528
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-xilinx.txt
@@ -0,0 +1,22 @@
+Xilinx SPI controller Device Tree Bindings
+-------------------------------------------------
+
+Required properties:
+- compatible            : Should be "xlnx,xps-spi-2.00.a" or "xlnx,xps-spi-2.00.b"
+- reg                   : Physical base address and size of SPI registers map.
+- interrupts            : Property with a value describing the interrupt
+                          number.
+- interrupt-parent      : Must be core interrupt controller
+
+Optional properties:
+- xlnx,num-ss-bits      : Number of chip selects used.
+
+Example:
+        axi_quad_spi@41e00000 {
+                        compatible = "xlnx,xps-spi-2.00.a";
+                        interrupt-parent = <&intc>;
+                        interrupts = <0 31 1>;
+                        reg = <0x41e00000 0x10000>;
+                        xlnx,num-ss-bits = <0x1>;
+        };
+