On Mon, 12 Nov 2001, Jun Sun wrote: > Geert Uytterhoeven wrote: > > On Mon, 12 Nov 2001, Maciej W. Rozycki wrote: > > > Unless you use a non-MC146818 RTC, which you need to write a separate > > > driver for anyway. > > > > Yep, so that's why both m68k and PPC have common routines to read/write the > > RTC, with a /dev/rtc-compatible abstraction on top of it. > > > > Geert, what is the abstraction they used? At first sight, we only use get_rtc_time() and mach_hwclk(). > The /dev/rtc interface is highly influenced by MC146818 chip, which not all > RTC devices are alike. The only fundamental thing in the driver is really the > read and write time. > > If their abstraction is reasonable, perhaps they can all converge to a better, > more generic rtc interface. Check out the following files from the m68k CVS tree (see http://linux-m68k-cvs.apia.dhs.org/): - drivers/char/genrtc.c - include/asm-m68k/machdep.h - include/asm-m68k/rtc.h On PPC, they have something similar. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
