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| author | Andrejs Cainikovs <andrejs.cainikovs@toradex.com> | 2024-02-09 14:02:12 +0100 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2024-03-26 18:19:30 -0400 |
| commit | a34c44b605c43382319c86d50cc7ef5b51d46add (patch) | |
| tree | 152b9a5a05880901ae414307dc756983208c833f | |
| parent | 3da9d32b7f4a1a9f7e4bb15bb82f2b2dd6719447 (diff) | |
| download | linux-a34c44b605c43382319c86d50cc7ef5b51d46add.tar.gz linux-a34c44b605c43382319c86d50cc7ef5b51d46add.tar.bz2 linux-a34c44b605c43382319c86d50cc7ef5b51d46add.zip | |
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>
| -rw-r--r-- | arch/arm64/boot/dts/ti/k3-am62-main.dtsi | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi index 284b90c94da8..6d125c86c2d3 100644 --- a/arch/arm64/boot/dts/ti/k3-am62-main.dtsi +++ b/arch/arm64/boot/dts/ti/k3-am62-main.dtsi @@ -613,6 +613,8 @@ interrupt-names = "host", "peripheral"; maximum-speed = "high-speed"; dr_mode = "otg"; + snps,usb2-gadget-lpm-disable; + snps,usb2-lpm-disable; }; }; @@ -636,6 +638,8 @@ interrupt-names = "host", "peripheral"; maximum-speed = "high-speed"; dr_mode = "otg"; + snps,usb2-gadget-lpm-disable; + snps,usb2-lpm-disable; }; }; |