dt-bindings: nvmem: add description for UniPhier eFuse

Add uniphier-efuse dt-bindings documentation.

Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
new file mode 100644 (file)
index 0000000..eccf490
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
@@ -0,0 +1,49 @@
+= UniPhier eFuse device tree bindings =
+
+This UniPhier eFuse must be under soc-glue.
+
+Required properties:
+- compatible: should be "socionext,uniphier-efuse"
+- reg: should contain the register location and length
+
+= Data cells =
+Are child nodes of efuse, bindings of which as described in
+bindings/nvmem/nvmem.txt
+
+Example:
+
+       soc-glue@5f900000 {
+               compatible = "socionext,uniphier-ld20-soc-glue-debug",
+                            "simple-mfd";
+               #address-cells = <1>;
+               #size-cells = <1>;
+               ranges = <0x0 0x5f900000 0x2000>;
+
+               efuse@100 {
+                       compatible = "socionext,uniphier-efuse";
+                       reg = <0x100 0x28>;
+               };
+
+               efuse@200 {
+                       compatible = "socionext,uniphier-efuse";
+                       reg = <0x200 0x68>;
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       /* Data cells */
+                       usb_mon: usb-mon@54 {
+                               reg = <0x54 0xc>;
+                       };
+               };
+       };
+
+= Data consumers =
+Are device nodes which consume nvmem data cells.
+
+Example:
+
+       usb {
+               ...
+               nvmem-cells = <&usb_mon>;
+               nvmem-cell-names = "usb_mon";
+       }