From: Arnd Bergmann <arnd@arndb.de>
To: Greg Ungerer <gerg@snapgear.com>
Cc: uClinux development list <uclinux-dev@uclinux.org>,
linux-kernel@vger.kernel.org
Subject: Re: [uClinux-dev] [PATCH] m68k: restore lost coldfire CLOCK_TICK_RATE
Date: Thu, 25 Jun 2009 13:30:09 +0200 [thread overview]
Message-ID: <200906251330.10127.arnd@arndb.de> (raw)
In-Reply-To: <4A42C5DC.1040103@snapgear.com>
On Thursday 25 June 2009, Greg Ungerer wrote:
> I thought it did that based on gettimeofday()? And that ends up
> going through the underlying timer code, which for both of
> the ColdFire timer types doesn't use CLOCK_TICK_RATE. They directly
> use the MCF_CLK definition.
The problem is the definition of TICK_NSEC, which is calculated from
CLOCK_TICK_RATE. If you use the i8253 PIT tick rate, this will be
slightly different from the regular TICK_NSEC value of (1000000000 / HZ).
Arnd <><
next prev parent reply other threads:[~2009-06-25 11:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-20 20:11 [PATCH] m68k: restore lost coldfire CLOCK_TICK_RATE Philippe De Muyter
2009-06-22 3:18 ` [uClinux-dev] " Greg Ungerer
2009-06-24 21:11 ` Philippe De Muyter
2009-06-25 0:33 ` Greg Ungerer
2009-06-25 11:30 ` Arnd Bergmann [this message]
2009-08-12 6:42 ` Greg Ungerer
2009-08-13 2:25 ` Philippe De Muyter
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