dt-bindings: Add bindings for SPI NAND devices

Add bindings for SPI NAND chips.

Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Jagan Teki <jagan@openedev.com>

diff --git a/doc/device-tree-bindings/mtd/spi-nand.txt b/doc/device-tree-bindings/mtd/spi-nand.txt
new file mode 100644 (file)
index 0000000..8b51f3b
--- /dev/null
+++ b/doc/device-tree-bindings/mtd/spi-nand.txt
@@ -0,0 +1,5 @@
+SPI NAND flash
+
+Required properties:
+- compatible: should be "spi-nand"
+- reg: should encode the chip-select line used to access the NAND chip