2.4.21-ben2 issues: RTC, Thermal and RTAS

[Geert Uytterhoeven]

On Tue, 13 Jan 2004, Sven Luther wrote:
> On Tue, Jan 13, 2004 at 06:09:38PM +0100, Geert Uytterhoeven wrote:
> > On Tue, 13 Jan 2004, Sven Luther wrote:
> > > On Wed, Dec 17, 2003 at 11:13:58AM +0100, Geert Uytterhoeven wrote:
> > > > On Wed, 17 Dec 2003, Sven Luther wrote:
> > > > > On Wed, Dec 17, 2003 at 10:57:07AM +0100, Geert Uytterhoeven wrote:
> > > > > > It uses the PC-style RTC driver (genrtc.o is not loaded).
> > > > >
> > > > > Mmm, what was your box again ? a chrp no ?
> > > >
> > > > Yep, CHRP LongTrail. It has a Winbond/Symphony Labs W83C553 SouthBridge.
> > >
> > > Could you tell me the content of your rtc OF node ? In particular i am
> > > interested in the reg value (probably 70/71 in isa space or so), and of
> > > the compatible stuff (i have ds1385-rtc).
> >
> > /proc/device-tree/pci/isa at 1/rtc/ has:
> >
> > total 0
> > -r--r--r--    1 root     root           11 Jan 13 18:06 compatible
> > -r--r--r--    1 root     root            4 Jan 13 18:06 device_type
> > -r--r--r--    1 root     root            4 Jan 13 18:06 linux,phandle
> > -r--r--r--    1 root     root            4 Jan 13 18:06 name
> > -r--r--r--    1 root     root           12 Jan 13 18:06 reg
> >
> > compatible:	pnpPNP,b00			(ASCII)
> > device_type:	rtc				(ASCII)
> > linux,phandle:	ff86 2aa4			(hexdump)
> > name:		rtc				(ASCII)
> > reg:		0000 0001 0000 0070 0000 0002	(hexdump)
>
> Ok. So, this is almost the same as me, except i have a ds1385-rtc
> compatible version, and some interrupt stuff.
>
> Can you confirm that the GEN_RTC driver works for you ?

To my surprise, genrtc in 2.4.23 does not work on my LongTrail!
The kernel crashes in init/do_mounts.c:mount_block_root() right after the call
to sys_chdir(), because current->fs is a NULL pointer. Weird, and it doesn't
really look genrtc-related, although the same source tree works fine if I
disable genrtc and build in rtc.

I also tried 2.6.0, and there it works fine, both in the builtin and modular
case: the kernel got the correct time, and hwclock works.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at 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

** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/