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SubjectRe: [PATCH] powerpc: Pegasos keyboard detection
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On Thu, 2007-07-26 at 18:48 -0700, Andrew Morton wrote:
> On Wed, 25 Jul 2007 17:12:45 +1000 Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>
> > On Tue, 2007-07-24 at 21:28 -0400, Alan Curry wrote:
> > > As of 2.6.22 the kernel doesn't recognize the i8042 keyboard/mouse controller
> > > on the PegasosPPC. This is because of a feature/bug in the OF device tree:
> > > the "device_type" attribute is an empty string instead of "8042" as the
> > > kernel expects. This patch (against 2.6.22.1) adds a secondary detection
> > > which looks for a device whose *name* is "8042" if there is no device whose
> > > *type* is "8042".
> > >
> > > Signed-off-by: Alan Curry <pacman@world.std.com>
> >
> > Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> >
> > Note, if there's a volunteer, we could probably turn that code into a
> > nice table lookup.
>
> Did this get merged, or otherwise fixed? Even though the code in there has
> changed quite a bit, it looks to my untrained eye like the fix is still
> applicable?

Merged a fixed version:

f5d834fc34e61f1a40435981062000e5d2b2baa8

(In linus tree as of now)

Cheers,
Ben.

>
> From: Alan Curry <pacman@TheWorld.com>
>
> As of 2.6.22 the kernel doesn't recognize the i8042 keyboard/mouse
> controller on the PegasosPPC. This is because of a feature/bug in the OF
> device tree: the "device_type" attribute is an empty string instead of
> "8042" as the kernel expects. This patch (against 2.6.22.1) adds a
> secondary detection which looks for a device whose *name* is "8042" if
> there is no device whose *type* is "8042".
>
> Signed-off-by: Alan Curry <pacman@world.std.com>
> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
> ---
>
> arch/powerpc/kernel/setup-common.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff -puN /dev/null /dev/null
> diff -puN arch/powerpc/kernel/setup-common.c~powerpc-pegasos-keyboard-detection arch/powerpc/kernel/setup-common.c
> --- a/arch/powerpc/kernel/setup-common.c~powerpc-pegasos-keyboard-detection
> +++ a/arch/powerpc/kernel/setup-common.c
> @@ -496,6 +496,12 @@ int check_legacy_ioport(unsigned long ba
> break;
> }
> np = of_find_node_by_type(NULL, "8042");
> + /*
> + * Pegasos has no device_type on its 8042 node, look for the
> + * name instead
> + */
> + if (!np)
> + np = of_find_node_by_name(NULL, "8042");
> break;
> case FDC_BASE: /* FDC1 */
> np = of_find_node_by_type(NULL, "fdc");
> _
>
>
> And ALan says that 2.6.22 is bust, but this patch no won't apply there so
> if we want to fix 2.6.22.x then Alan's original patch would be needed.
>
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