usb: dwc2: Add support for Canaan K230

Canaan Kendryte K230 SoC instantiates a dwc2 v4.30a core. This patch
adds the compatible for it.

Signed-off-by: Junhui Liu <junhui.liu@pigmoral.tech>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

diff --git a/doc/device-tree-bindings/usb/dwc2.txt b/doc/device-tree-bindings/usb/dwc2.txt
index 7a533f6..9a87202 100644 (file)
--- a/doc/device-tree-bindings/usb/dwc2.txt
+++ b/doc/device-tree-bindings/usb/dwc2.txt
@@ -4,6 +4,7 @@ Platform DesignWare HS OTG USB 2.0 controller
 Required properties:
 - compatible : One of:
   - brcm,bcm2835-usb: The DWC2 USB controller instance in the BCM2835 SoC.
+  - canaan,k230-otg: The DWC2 USB controller instance in the K230 SoC.
   - hisilicon,hi6220-usb: The DWC2 USB controller instance in the hi6220 SoC.
   - "lantiq,arx100-usb": The DWC2 USB controller instance in Lantiq ARX SoCs;
   - "lantiq,xrx200-usb": The DWC2 USB controller instance in Lantiq XRX SoCs;