[PATCH 1/3] arm64: dts: exynos7870: add quirk to disable USB2 LPM in gadget mode

[Kaustabh Chakraborty]

In gadget mode, USB connections are sluggish. The device won't send
packets to the host unless the host sends packets to the device. For
instance, SSH-ing through the USB network would apparently not work
unless you're flood-pinging the device's IP.

Add the property snps,usb2-gadget-lpm-disable to the dwc3 node, which
seems to solve this issue.

Fixes: d6f3a7f91fdb ("arm64: dts: exynos: add initial devicetree support for exynos7870")
Cc: stable at vger.kernel.org # v6.16
Signed-off-by: Kaustabh Chakraborty <kauschluss at disroot.org>
---
 arch/arm64/boot/dts/exynos/exynos7870.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/exynos7870.dtsi b/arch/arm64/boot/dts/exynos/exynos7870.dtsi
index 5cba8c9bb403405b2d9721ab8cf9d61e3d5faf95..d5d347623b9038b71da55dccdc9084aeaf71618c 100644
--- a/arch/arm64/boot/dts/exynos/exynos7870.dtsi
+++ b/arch/arm64/boot/dts/exynos/exynos7870.dtsi
@@ -327,6 +327,7 @@ usb at 0 {
 				phys = <&usbdrd_phy 0>;
 
 				usb-role-switch;
+				snps,usb2-gadget-lpm-disable;
 			};
 		};
 

-- 
2.49.0