mtd: nand: add tango NFC dt bindings doc

Add the tango NAND Flash Controller dt bindings documentation.

Signed-off-by: Marc Gonzalez <marc_gonzalez@sigmadesigns.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

diff --git a/Documentation/devicetree/bindings/mtd/tango-nand.txt b/Documentation/devicetree/bindings/mtd/tango-nand.txt
new file mode 100644 (file)
index 0000000..ad5a02f
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/tango-nand.txt
@@ -0,0 +1,38 @@
+Sigma Designs Tango4 NAND Flash Controller (NFC)
+
+Required properties:
+
+- compatible: "sigma,smp8758-nand"
+- reg: address/size of nfc_reg, nfc_mem, and pbus_reg
+- dmas: reference to the DMA channel used by the controller
+- dma-names: "nfc_sbox"
+- clocks: reference to the system clock
+- #address-cells: <1>
+- #size-cells: <0>
+
+Children nodes represent the available NAND chips.
+See Documentation/devicetree/bindings/mtd/nand.txt for generic bindings.
+
+Example:
+
+       nandc: nand-controller@2c000 {
+               compatible = "sigma,smp8758-nand";
+               reg = <0x2c000 0x30 0x2d000 0x800 0x20000 0x1000>;
+               dmas = <&dma0 3>;
+               dma-names = "nfc_sbox";
+               clocks = <&clkgen SYS_CLK>;
+               #address-cells = <1>;
+               #size-cells = <0>;
+
+               nand@0 {
+                       reg = <0>; /* CS0 */
+                       nand-ecc-strength = <14>;
+                       nand-ecc-step-size = <1024>;
+               };
+
+               nand@1 {
+                       reg = <1>; /* CS1 */
+                       nand-ecc-strength = <14>;
+                       nand-ecc-step-size = <1024>;
+               };
+       };