`usb start` freezes friendlyelec CM3588 Plus NAS board

[Krumelmonster]

Hello everyone,

Using the cm3588-nas-rk355_defconfig, running `usb start` in u-boot 
freezes my cm3588 nas in all commits I checked:
v2024.10, v2025.10, v2026.01-rc, and the current `rockchip` branch 
(commit a81c91446a1) on collaboras rk3588 repo at
https://gitlab.collabora.com/hardware-enablement/rockchip-3588/u-boot

It doesn't freeze if I disable PHY_ROCKCHIP_INNO_USB2.

This is the 32GB RAM, 64GB eMMC variant of the CM3588 Plus NAS Kit as 
sold by friendlyelec.

I don't intend to use usb support there, just happened to stumble upon 
this. USB gadget and host are supposedly working on the CM3588 according 
to commit 5bc8209e1ba ("board: rockchip: Add FriendlyElec CM3588 NAS").

=> usb start
starting USB...
USB EHCI 1.00

No further output follows.

I will happily provide further information upon request.

Regards,
krumelmonster