dt-bindings: nvmem: Add Spreadtrum eFuse controller documentation

This patch adds the binding documentation for Spreadtrum eFuse controller.

Signed-off-by: Freeman Liu <freeman.liu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20191029114240.14905-7-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/Documentation/devicetree/bindings/nvmem/sprd-efuse.txt b/Documentation/devicetree/bindings/nvmem/sprd-efuse.txt
new file mode 100644 (file)
index 0000000..96b6fee
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/sprd-efuse.txt
@@ -0,0 +1,39 @@
+= Spreadtrum eFuse device tree bindings =
+
+Required properties:
+- compatible: Should be "sprd,ums312-efuse".
+- reg: Specify the address offset of efuse controller.
+- clock-names: Should be "enable".
+- clocks: The phandle and specifier referencing the controller's clock.
+- hwlocks: Reference to a phandle of a hwlock provider node.
+
+= Data cells =
+Are child nodes of eFuse, bindings of which as described in
+bindings/nvmem/nvmem.txt
+
+Example:
+
+       ap_efuse: efuse@32240000 {
+               compatible = "sprd,ums312-efuse";
+               reg = <0 0x32240000 0 0x10000>;
+               clock-names = "enable";
+               hwlocks = <&hwlock 8>;
+               clocks = <&aonapb_gate CLK_EFUSE_EB>;
+
+               /* Data cells */
+               thermal_calib: calib@10 {
+                       reg = <0x10 0x2>;
+               };
+       };
+
+= Data consumers =
+Are device nodes which consume nvmem data cells.
+
+Example:
+
+       thermal {
+               ...
+
+               nvmem-cells = <&thermal_calib>;
+               nvmem-cell-names = "calibration";
+       };