Fix EIC7700 USB reset's issue

From: Hang Cao <[email protected]>

Fix EIC7700 USB reset's issue

Changes in v2->v1:
- Update commit message.
- Link to V1:https://lore.kernel.org/all/[email protected]/

Hang Cao (1):
dt-bindings: usb: Fix EIC7700 USB reset's issue

 .../devicetree/bindings/usb/eswin,eic7700-usb.yaml         | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--
2.34.1

From: Hang Cao <[email protected]>

The EIC7700 USB requires a USB PHY reset operation; otherwise, the USB will not work. The reason why the USB driver that was applied can work properly is that the USB PHY has already been reset in ESWIN's U-Boot.

However, the proper functioning of the USB driver should not be dependent on the bootloader. Therefore, it is necessary to incorporate the USB PHY reset signal into the DT bindings.

This patch does not introduce any backward incompatibility since the dts is not upstream yet. As array of reset operations are used in the driver, no modifications to the USB controller driver are needed.

---
 .../devicetree/bindings/usb/eswin,eic7700-usb.yaml         | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

index 41c3b1b98991..658260619423 100644
@@ -41,12 +41,13 @@ properties:
       - const: usb_en
 
   resets:
-    maxItems: 2
+    maxItems: 3
 
   reset-names:
     items:
       - const: vaux
       - const: usb_rst
+      - const: usb_phy
 
   eswin,hsp-sp-csr:
     description:

@@ -85,8 +86,8 @@ examples:
         interrupt-parent = <&plic>;
         interrupts = <85>;
         interrupt-names = "peripheral";
-        resets = <&reset 84>, <&hspcrg 2>;
-        reset-names = "vaux", "usb_rst";
+        resets = <&reset 84>, <&hspcrg 2>, <&hspcrg 4>;
+        reset-names = "vaux", "usb_rst", "usb_phy";
         dr_mode = "peripheral";
         maximum-speed = "high-speed";
         phy_type = "utmi";

--
2.34.1