gianfar: Add hardware RX timestamping support
authorManfred Rudigier <Manfred.Rudigier@omicron.at>
Thu, 8 Apr 2010 23:10:03 +0000 (23:10 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 13 Apr 2010 08:41:31 +0000 (01:41 -0700)
commitcc772ab7cdcaa24d1fae332d92a1602788644f7a
treeefbcb9bf8c1c9214f612d2044321a30ada230255
parente44171f115de3dedf34064646206deb91549865f
gianfar: Add hardware RX timestamping support

The device is configured to insert hardware timestamps into all
received packets. The RX timestamps are extracted from the padding
alingment bytes during the clean_rx_ring operation and copied into the
skb_shared_hwtstamps struct of the skb. This extraction only happens if
the rx_filter was set to something else than HWTSTAMP_FILTER_NONE with
the SIOCSHWTSTAMP ioctl command.

Hardware timestamping is only supported for eTSEC devices. To indicate
device support the new FSL_GIANFAR_DEV_HAS_TIMER flag was introduced.

Signed-off-by: Manfred Rudigier <manfred.rudigier@omicron.at>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/gianfar.c
drivers/net/gianfar.h