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arm64: dts: exynos7870: add quirk to disable USB2 LPM in gadget mode

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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: d6f3a7f91f ("arm64: dts: exynos: add initial devicetree support for exynos7870")
Cc: stable@vger.kernel.org # v6.16
Signed-off-by: Kaustabh Chakraborty <kauschluss@disroot.org>
Link: https://lore.kernel.org/r/20250626-exynos7870-dts-fixes-v1-1-349987874d9a@disroot.org
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
This commit is contained in:
Kaustabh Chakraborty 2025-06-26 13:02:56 +05:30 committed by Krzysztof Kozlowski
parent 98be2d60fd
commit e9355e894a
1 changed files with 1 additions and 0 deletions
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arch/arm64/boot/dts/exynos/exynos7870.dtsi
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@ -327,6 +327,7 @@ usb@0 {
phys = <&usbdrd_phy 0>;
usb-role-switch;
snps,usb2-gadget-lpm-disable;
};
};