https://bugs.winehq.org/show_bug.cgi?id=11908
--- Comment #41 from mirh mirh@protonmail.ch --- I know it's only userspace, but that doesn't have to mean you are only unprivileged.
AFAIK /dev/mem is always there available (at least, if that hasn't been disallowed in Kconfig), and AFAICT lspci shows some clocks with sudo and -vvv