linux-kernel - [PATCH] powerpc: Pegasos keyboard detection

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Message-Id: <200707250128.l6P1SWSF1336935@shell01.TheWorld.com>
Date:	Tue, 24 Jul 2007 21:28:32 -0400 (EDT)
From:	Alan Curry <pacman@...World.com>
To:	linux-kernel@...r.kernel.org
Cc:	linuxppc-dev@...abs.org
Subject: [PATCH] powerpc: Pegasos keyboard detection

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@...ld.std.com>

--- arch/powerpc/kernel/setup-common.c.orig	2007-07-24 19:04:17.000000000 -0500
+++ arch/powerpc/kernel/setup-common.c	2007-07-24 19:06:36.000000000 -0500
@@ -487,6 +487,10 @@ int check_legacy_ioport(unsigned long ba
 	switch(base_port) {
 	case I8042_DATA_REG:
 		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");

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