On Tue, 24 Feb 2009, Brad Boyer wrote: > On Tue, Feb 24, 2009 at 07:37:08PM +0100, Alessandro Zummo wrote: > > On Tue, 24 Feb 2009 18:56:03 +0100 (CET) > > Geert Uytterhoeven <Geert.Uytterhoeven@xxxxxxxxxxx> wrote: > > > Converting all (ca. 20?) ppc and m68k RTC support code into individual RTC > > > class drivers would add ca. 100+ lines of code for each individual driver. > > > > How different are all of those boards? It's simply a matter > > of parameters and offsets? can we group them somehow? > > I imagine we could cut down the numbers somewhat with clever code sharing, > but it's still going to be a fairly large number. I don't know all the > embedded boards, but just with all the Macintosh models there are at > least three and maybe four drastically different methods of RTC access, > and all of them are directly tied to some chip that does something else > completely unrelated. For one of them we don't even have a driver at the Yeah, on Mac/m68k the RTC is usually handled by a chip that does lots of other things, so you need to keep the bulk of the code in arch/m68k/ anyway. > moment. They also are all custom chips that wouldn't be used anywhere > else. The other thing we need to keep in mind is that if we do it right > we can share drivers across m68k and powerpc in some cases. I imagine > some of the embedded powerpc boards are using chips that are common in > other architectures as well. Many embedded powerpc boards already have RTC class drivers under drivers/rtc/, as their RTC chips are sufficiently common. The ones that don't are mostly "workstation" or "server" type hardware. The full list is: - rtas_set_rtc_time - mpc8xx_set_rtc_time - beat_get_rtc_time - chrp_set_rtc_time - iSeries_set_rtc_time - maple_set_rtc_time - pmac_set_rtc_time - ps3_set_rtc_time With kind regards, Geert Uytterhoeven Software Architect Sony Techsoft Centre Europe The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium Phone: +32 (0)2 700 8453 Fax: +32 (0)2 700 8622 E-mail: Geert.Uytterhoeven@xxxxxxxxxxx Internet: http://www.sony-europe.com/ A division of Sony Europe (Belgium) N.V. VAT BE 0413.825.160 · RPR Brussels Fortis · BIC GEBABEBB · IBAN BE41293037680010 -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
