[PATCH v2 2/2] arm64: dts: mediatek: mt8186: Add missing xhci clock to usb controllers

[AngeloGioacchino Del Regno]

Il 13/02/24 16:02, Nícolas F. R. A. Prado ha scritto:
> The mtu3 usb controllers don't list the xhci clock, though they require
> it, and thus rely on the bootloader leaving it on in order to work.
> 
> When booting with the upstream arm64 defconfig, the usb controllers will
> defer probe until modules have loaded since they have an indirect
> dependency on CONFIG_MTK_CMDQ, which is configured as a module. However
> at the point where modules are loaded, unused clocks are also disabled,
> causing the usb controllers to probe without the xhci clock enabled and
> fail to probe:
> 
> mtu3 11201000.usb: clks of sts1 are not stable!
> mtu3 11201000.usb: device enable failed -110
> mtu3 11201000.usb: mtu3 hw init failed:-110
> mtu3 11201000.usb: failed to initialize gadget
> mtu3: probe of 11201000.usb failed with error -110
> 
> (and same for the one at 11281000)
> 
> Add the missing clock for the usb controllers so that they can
> successfully probe without relying on the bootloader state.
> 
> Fixes: f6c3e61c5486 ("arm64: dts: mediatek: mt8186: Add MTU3 nodes")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>