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arm64: dts: ti: k3-am62-main: disable usb lpm

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AM62 USB works with some devices, while failing to operate with others.

[  560.189822] xhci-hcd xhci-hcd.4.auto: xHCI Host Controller
[  560.195631] xhci-hcd xhci-hcd.4.auto: new USB bus registered, assigned bus number 2
[  574.388509] xhci-hcd xhci-hcd.4.auto: can't setup: -110
[  574.393814] xhci-hcd xhci-hcd.4.auto: USB bus 2 deregistered
[  574.399544] xhci-hcd: probe of xhci-hcd.4.auto failed with error -110

This seems to be related to LPM (Link Power Management), and disabling it
turns USB into reliable working state.

As per AM62 reference manual:

> 4.8.2.1 USB2SS Unsupported Features
>
> The following features are not supported on this family of devices:
> ...
> - USB 2.0 ECN: Link Power Management (LPM)
> ...

Fixes: 2240f96cf3 ("arm64: dts: ti: k3-am62-main: Add support for USB")
Signed-off-by: Andrejs Cainikovs <andrejs.cainikovs@toradex.com>
Reviewed-by: Francesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Link: https://lore.kernel.org/r/20240209130213.38908-1-andrejs.cainikovs@gmail.com
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
This commit is contained in:
Andrejs Cainikovs 2024-02-09 14:02:12 +01:00 committed by Vignesh Raghavendra
parent c186e85c72
commit 9c99b337a8
1 changed files with 4 additions and 0 deletions
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4
arch/arm64/boot/dts/ti/k3-am62-main.dtsi
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@ -639,6 +639,8 @@ usb0: usb@31000000 {
interrupt-names = "host", "peripheral";
maximum-speed = "high-speed";
dr_mode = "otg";
snps,usb2-gadget-lpm-disable;
snps,usb2-lpm-disable;
};
};
@ -662,6 +664,8 @@ usb1: usb@31100000 {
interrupt-names = "host", "peripheral";
maximum-speed = "high-speed";
dr_mode = "otg";
snps,usb2-gadget-lpm-disable;
snps,usb2-lpm-disable;
};
};