linux-kernel - Re: [PATCH 1/2] gianfar: fix fiper alignment after resetting the time

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Date:	Sun, 07 Aug 2011 22:53:32 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	richardcochran@...il.com
Cc:	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	stable@...nel.org
Subject: Re: [PATCH 1/2] gianfar: fix fiper alignment after resetting the
 time

From: Richard Cochran <richardcochran@...il.com>
Date: Sun,  7 Aug 2011 09:03:03 +0200

> After resetting the time, the PPS signals on the FIPER output channels
> are incorrectly offset from the clock time, as can be readily verified
> by a looping back the FIPER to the external time stamp input.
> 
> Despite its name, setting the "Fiper Realignment Disable" bit seems to
> fix the problem, at least on the P2020.
> 
> Also, following the example code from the Freescale BSP, it is not really
> necessary to disable and re-enable the timer in order to reprogram the
> FIPER. (The documentation is rather unclear on this point. It seems that
> writing to the alarm register also disables the FIPER.)
> 
> Signed-off-by: Richard Cochran <richard.cochran@...cron.at>
> Cc: <stable@...nel.org>

Applied.
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