[PATCH v2 2/4] spi: Add devicetree bindings documentation for Loongson SPI

[Qing Zhang <zhangqing@xxxxxxxxxxx>]

Add spi-ls7a binding documentation.

Signed-off-by: Qing Zhang <zhangqing@xxxxxxxxxxx>
---
 Documentation/devicetree/bindings/spi/spi-ls7a.txt | 31 ++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-ls7a.txt

diff --git a/Documentation/devicetree/bindings/spi/spi-ls7a.txt b/Documentation/devicetree/bindings/spi/spi-ls7a.txt
new file mode 100644
index 0000000..56247b5
--- /dev/null
+++ b/Documentation/devicetree/bindings/spi/spi-ls7a.txt
@@ -0,0 +1,31 @@
+Binding for LOONGSON LS7A SPI controller
+
+Required properties:
+- compatible: should be "pci0014,7a0b.0","pci0014,7a0b","pciclass088000","pciclass0880".
+- reg: reference IEEE Std 1275-1994.
+- #address-cells: <1>, as required by generic SPI binding.
+- #size-cells: <0>, also as required by generic SPI binding.
+- #interrupts: No hardware interrupt.
+
+Child nodes as per the generic SPI binding.
+
+Example:
+
+			spi@16,0 {
+				compatible = "pci0014,7a0b.0",
+						"pci0014,7a0b",
+						"pciclass088000",
+						"pciclass0880";
+
+				#address-cells = <1>;
+				#size-cells = <0>;
+				reg = <0xb000 0x0 0x0 0x0 0x0>;
+				num-chipselects = <0>;
+				spiflash: s25fl016k@0 {
+				#address-cells = <1>;
+				#size-cells = <1>;
+				compatible ="spansion,s25fl016k","jedec,spi-nor";
+				spi-max-frequency=<50000000>;
+				reg=<0>;
+				};
+			};
-- 
2.1.0