Add uniphier-efuse dt-bindings documentation.

Signed-off-by: Keiji Hayashibara <[email protected]>
---
 .../devicetree/bindings/nvmem/uniphier-efuse.txt   | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt

diff --git a/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt 
b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
new file mode 100644
index 0000000..09024a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
@@ -0,0 +1,45 @@
+= 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 base 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 {
+                       compatible = "socionext,uniphier-efuse",
+                                    "syscon";
+                       reg = <0x100 0xf00>;
+                       #address-cells = <1>;
+                       #size-cells = <1>;
+
+                       /* Data cells */
+                       usb_mon: usb_mon {
+                               reg = <0x154 0xc>;
+                       };
+               };
+       };
+
+= Data consumers =
+Are device nodes which consume nvmem data cells.
+
+Example:
+
+       usb {
+               ...
+               nvmem-cells = <&usb_mon>;
+               nvmem-cell-names = "usb_mon";
+       }
-- 
2.7.4

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