linux-kernel - [PATCH] m68k: restore lost coldfire CLOCK_TICK

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Message-ID: <20090620201147.GA14095@frolo.macqel>
Date:	Sat, 20 Jun 2009 22:11:47 +0200
From:	Philippe De Muyter <phdm@...qel.be>
To:	linux-kernel@...r.kernel.org, uclinux-dev@...inux.org
Subject: [PATCH] m68k: restore lost coldfire CLOCK_TICK_RATE

Hello list,

The good definition of CLOCK_TICK_RATE for coldfires has been lost in the
merge of m68k and m68knommu include files.  Restore it.  Culprit :
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=ebafc17468d58bd903c886175ca84a4edc69ae1d;hp=34055b806a6334624e7e8af6eefc3aee42372a85

Signed-off-by: Philippe De Muyter <phdm@...qel.be>

diff -r 8dcc271a81a8 arch/m68k/include/asm/timex.h
--- a/arch/m68k/include/asm/timex.h	Thu Jun 18 14:07:46 2009 -0700
+++ b/arch/m68k/include/asm/timex.h	Sat Jun 20 21:46:25 2009 +0200
@@ -3,10 +3,23 @@
  *
  * m68k architecture timex specifications
  */
-#ifndef _ASMm68k_TIMEX_H
-#define _ASMm68k_TIMEX_H
+#ifndef _ASMm68K_TIMEX_H
+#define _ASMm68K_TIMEX_H
 
+#ifdef CONFIG_COLDFIRE
+/*
+ * CLOCK_TICK_RATE should give the underlying frequency of the tick timer
+ * to make ntp work best.  For Coldfires, that's the main clock.
+ */
+#include <asm/coldfire.h>
+#define CLOCK_TICK_RATE	MCF_CLK
+#else
+/*
+ * This default CLOCK_TICK_RATE is probably wrong for many 68k boards
+ * Users of those boards will need to check and modify accordingly
+ */
 #define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
+#endif
 
 typedef unsigned long cycles_t;
 
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