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>

1 files changed, 49 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt b/Documentation/devicetree/bindings/nvmem/uniphier-efuse.txt
new file mode 100644
index 000000000000..eccf490d5a6d
--- /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";
+        }