Add devicetree binding documentation for dwc3 glue driver implemented
on Socionext UniPhier SoCs.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
---
.../devicetree/bindings/usb/dwc3-uniphier.txt | 58 ++++++++++++++++++++++
1 file changed, 58 insertions(+)
create mode 100644 Documentation/devicetree/bindings/usb/dwc3-uniphier.txt
diff --git a/Documentation/devicetree/bindings/usb/dwc3-uniphier.txt b/Documentation/devicetree/bindings/usb/dwc3-uniphier.txt
new file mode 100644
index 0000000..677e072
--- /dev/null
+++ b/Documentation/devicetree/bindings/usb/dwc3-uniphier.txt
@@ -0,0 +1,58 @@
+UniPhier DWC3 glue layer
+
+This describes the devicetree bindings for dwc3-uniphier driver implemented on
+Socionext UniPhier SoCs.
+
+Required properties:
+- compatible:
+ - "socionext,uniphier-pxs2-dwc3" : For UniPhier PXs2 SoC
+ - "socionext,uniphier-ld20-dwc3" : For UniPhier LD20 SoC
+- reg: Address and range of the glue logic
+- clocks: List of phandles for the clocks, and the number of phandles depends
+ on SoC platform.
+
+Optional properties:
+- resets: List of phandles for the resets, and the number of phandles depends
+ on SoC platform.
+- nvmem-cells: Phandles to nvmem cell that contains the trimming data.
+ Available only for LD20, and if unspecified, default value is used.
+- nvmem-cell-names: Should be the following names, which correspond to each
+ nvmem-cells. N is the number indicating a port of phy.
+ All of the 3 parameters associated with the following names are
+ required for each port, if any one is omitted, the trimming data
+ of the port will not be set at all.
+ - "rtermN", "sel_tN", "hs_iN" : Each cell name for phy parameters
+
+Required child node:
+A child node must exist to represent the core DWC3 IP block. The name of
+the node is not important. The content of the node is defined in dwc3.txt.
+
+Example:
+
+ usb: usb@65b00000 {
+ compatible = "socionext,uniphier-ld20-dwc3";
+ reg = <0x65b00000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ clocks = <&sys_clk 14>, <&sys_clk 16>, <&sys_clk 17>;
+ resets = <&sys_rst 12>, <&sys_rst 16>, <&sys_rst 17>,
+ <&sys_rst 18>, <&sys_rst 19>;
+ nvmem-cells = <&usb_rterm0>, <&usb_rterm1>,
+ <&usb_rterm2>, <&usb_rterm3>,
+ <&usb_sel_t0>, <&usb_sel_t1>,
+ <&usb_sel_t2>, <&usb_sel_t3>,
+ <&usb_hs_i0>, <&usb_hs_i0>,
+ <&usb_hs_i2>, <&usb_hs_i2>;
+ nvmem-cell-names = "rterm0", "rterm1", "rterm2", "rterm3",
+ "sel_t0", "sel_t1", "sel_t2", "sel_t3",
+ "hs_i0", "hs_i1", "hs_i2", "hs_i3";
+ ranges;
+
+ dwc3@65a00000 {
+ compatible = "snps,dwc3";
+ reg = <0x65a00000 0xcd00>;
+ interrupt-names = "host";
+ interrupts = <0 134 4>;
+ dr_mode = "host";
+ };
+ };
--
2.7.4
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