[PATCH net-next v4 0/2] mlx4_en: Add PTP support

[Shawn Bohrer <shawn.bohrer@gmail.com>]

From: Shawn Bohrer <sbohrer@rgmadvisors.com>

This adds support to the mlx4_en driver to support running a PTP client
with hardware timestamp support.  It also allows synchronization of the
hardware timestamped packets with the system clock.

v2:
* Implemented mlx4_en_phc_adjfreq() in software.
* Protected timecounter with a spinlock
* Set the phc_index in mlx4_en_get_ts_info()
* Use a hard-coded ptp_clock_info.name

v3: is code identical to v2.  I simply finished testing it with
linuxptp, cleaned up the commit description a little and sent to davem.

v4:
* Initialize clock_lock
* Use reader/writer spinlock for clock_lock to improve performance when
 timetamping is enabled.

Shawn Bohrer (2):
  mlx4_en: Add PTP hardware clock
  mlx4_en: Only cycle port if HW timestamp config changes

 drivers/net/ethernet/mellanox/mlx4/en_clock.c   |  198 ++++++++++++++++++++++-
 drivers/net/ethernet/mellanox/mlx4/en_ethtool.c |    3 +
 drivers/net/ethernet/mellanox/mlx4/en_main.c    |    3 +
 drivers/net/ethernet/mellanox/mlx4/mlx4_en.h    |    6 +
 4 files changed, 202 insertions(+), 8 deletions(-)

-- 
1.7.7.6