[PATCH 3/3] mtd: spi-nand: add devicetree binding

[Peter Pan 潘栋 (peterpandong)]

This commit adds the devicetree binding document that specifies the
spi nand devices support.

Signed-off-by: Peter Pan <peterpandong@xxxxxxxxxx>
---
 Documentation/devicetree/bindings/mtd/spi-nand.txt | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/spi-nand.txt

diff --git a/Documentation/devicetree/bindings/mtd/spi-nand.txt b/Documentation/devicetree/bindings/mtd/spi-nand.txt
new file mode 100644
index 0000000..9dd3efd
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/spi-nand.txt
@@ -0,0 +1,22 @@
+* NAND driver for MT29F, GD5F and similar SPI NAND flash chips
+
+Required properties:
+- #address-cells, #size-cells : Must be present if the device has sub-nodes
+  representing partitions.
+- compatible : Should be the manufacturer and the name of the chip. Bear in mind
+               the DT binding is not Linux-only, but in case of Linux, see the
+               "spi_nand_id_table" array in drivers/mtd/spi-nand/spi-nand-device.c
+               for the list of supported chips.
+- reg : Chip-Select number
+- spi-max-frequency : Maximum frequency of the SPI bus the chip can operate at
+
+Example:
+
+	flash: flash@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "micron,mt29f";
+		reg = <0>;
+		spi-max-frequency = <50000000>;
+	};
+
-- 
1.9.1
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