From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp2.linux-foundation.org (smtp2.linux-foundation.org [207.189.120.14]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "smtp.linux-foundation.org", Issuer "CA Cert Signing Authority" (verified OK)) by ozlabs.org (Postfix) with ESMTP id 83B93DDE21 for ; Fri, 27 Jul 2007 11:48:47 +1000 (EST) Date: Thu, 26 Jul 2007 18:48:00 -0700 From: Andrew Morton To: Benjamin Herrenschmidt Subject: Re: [PATCH] powerpc: Pegasos keyboard detection Message-Id: <20070726184800.0bb3b9fb.akpm@linux-foundation.org> In-Reply-To: <1185347565.5439.310.camel@localhost.localdomain> References: <200707250128.l6P1SWSF1336935@shell01.TheWorld.com> <1185347565.5439.310.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Cc: linuxppc-dev@ozlabs.org, Alan Curry , linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Wed, 25 Jul 2007 17:12:45 +1000 Benjamin Herrenschmidt 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 > > Acked-by: Benjamin Herrenschmidt > > 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? From: Alan Curry 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 Acked-by: Benjamin Herrenschmidt Signed-off-by: Andrew Morton --- 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.