Re: [PATCH 1/2] gianfar: fix fiper alignment after resetting thetime

From: David Miller
Date: Mon Aug 08 2011 - 01:53:41 EST

From: Richard Cochran <richardcochran@xxxxxxxxx>
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@xxxxxxxxxx>
> Cc: <stable@xxxxxxxxxx>

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