--- zzzz-none-000/linux-4.4.271/Documentation/devicetree/bindings/usb/dwc3.txt	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/Documentation/devicetree/bindings/usb/dwc3.txt	2023-04-19 10:22:27.000000000 +0000
@@ -46,6 +46,11 @@
  - snps,quirk-frame-length-adjustment: Value for GFLADJ_30MHZ field of GFLADJ
 	register for post-silicon frame length adjustment when the
 	fladj_30mhz_sdbnd signal is invalid or incorrect.
+ - snps,quirk-ref-clock-adjustment: Value for GFLADJ_REFCLK_* fields of GFLADJ
+    register for reference clock other than 19.2 MHz is used.
+ - snps,quirk-ref-clock-period: Value for REFCLKPER filed of GUCTL. This field
+    indicates in terms of nano seconds the period of ref_clk. To calculate the
+	ideal value, REFCLKPER = (1/ref_clk in Hz)*10^9.
 
 This is usually a subnode to DWC3 glue to which it is connected.