https://lkml.iu.edu/hypermail/linux/kernel/1910.2/08764.html
Linux-Kernel Archive: RE: [PATCH 1/2] rtc/ia64: remove legacy efirtc driver
https://manpages.ubuntu.com/manpages/questing/man4/efidev.4freebsd.html
Ubuntu Manpage: efidev, efirtc
ubuntumanpage
https://lkml.iu.edu/hypermail/linux/kernel/1910.2/08604.html
Linux-Kernel Archive: Re: [PATCH 1/2] rtc/ia64: remove legacy efirtc driver
https://manpages.ubuntu.com/manpages/resolute/man4/efidev.4freebsd.html
Ubuntu Manpage: efidev, efirtc
ubuntumanpage