net: fec: ptp: Use the 31-bit ptp timer.

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When ptp switches from software adjustment to hardware ajustment, linux ptp can't converge.
It is caused by the IP limit. Hardware adjustment logcial have issue when ptp counter
runs over 0x80000000(31 bit counter). The internal IP reference manual already remove 32bit
free-running count support. This patch replace the 32-bit PTP timer with 31-bit.

Signed-off-by: Luwei Zhou <b45643@freescale.com>
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Luwei Zhou 2014-10-10 13:15:28 +08:00 • committed by David S. Miller

parent 02ea80741a

commit f28460b229

1 changed files with 6 additions and 4 deletions

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drivers/net/ethernet/freescale/fec_ptp.c

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