net: fec: ptp: Enable PPS output based on ptp clock

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FEC ptp timer has 4 channel compare/trigger function. It can be used to
enable pps output.
The pulse would be ouput high exactly on N second. The pulse ouput high
on compare event mode is used to produce pulse per second.  The pulse
width would be one cycle based on ptp timer clock source.Since 31-bit
ptp hardware timer is used, the timer will wrap more than 2 seconds. We
need to reload the compare compare event about every 1 second.

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

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Luwei Zhou 2014-10-10 13:15:30 +08:00 • committed by David S. Miller

parent 89bddcda7e

commit 278d240478

3 changed files with 205 additions and 1 deletions

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7

drivers/net/ethernet/freescale/fec.h

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2

drivers/net/ethernet/freescale/fec_main.c

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197

drivers/net/ethernet/freescale/fec_ptp.c

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