From f1ecb0e563595d4ba9a3b8e39ed52a3dc2d8e328 Mon Sep 17 00:00:00 2001 From: Hang Cao Date: Wed, 15 Apr 2026 14:42:38 +0800 Subject: [PATCH] dt-bindings: usb: Fix EIC7700 USB reset's issue 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. Fixes: c640a4239db5 ("dt-bindings: usb: Add ESWIN EIC7700 USB controller") Cc: stable Signed-off-by: Hang Cao Acked-by: Conor Dooley Link: https://patch.msgid.link/20260415064238.1784-1-caohang@eswincomputing.com Signed-off-by: Greg Kroah-Hartman --- .../devicetree/bindings/usb/eswin,eic7700-usb.yaml | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml b/Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml index 41c3b1b98991..658260619423 100644 --- a/Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml +++ b/Documentation/devicetree/bindings/usb/eswin,eic7700-usb.yaml @@ -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";