arm64: dts: ti: k3-am62-main: disable usb lpm
[ Upstream commit 9c99b337a8755a09df7735d4324ae26a6eca6261 ] 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: 2240f96cf3cd ("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> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -613,6 +613,8 @@
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interrupt-names = "host", "peripheral";
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maximum-speed = "high-speed";
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dr_mode = "otg";
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snps,usb2-gadget-lpm-disable;
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snps,usb2-lpm-disable;
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};
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};
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@ -636,6 +638,8 @@
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interrupt-names = "host", "peripheral";
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maximum-speed = "high-speed";
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dr_mode = "otg";
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snps,usb2-gadget-lpm-disable;
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snps,usb2-lpm-disable;
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};
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};
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