ptp: dynamic pin control

This patch series introduces a way of changing the auxiliary PTP Hardware Clock functions (periodic output signals and time stamping external signals) at run time. In the past on the netdev list, we have discussed other ways to handle this, such as module parameters and ethtool. This series implements a new PHC ioctl because that is the most natural way. Users already activate the auxiliary functions via the ioctls. The sysfs interface has also been expanded so that the pin configuration can be programmed using shell scripts.

The first patch adds the new ioctls. The PHC subsystem does most of the work of maintaining the function-to-pin mapping. Drivers will only need to allocate and initialize a pin configuration table and also provide a new method that validates a particular assignment.

Patches 5 and 6 just clean up a couple of issues in the phyter driver, and the remaining patches actually hook the phyter's pins into the new system.

Comments and questions are most welcome.

Thanks,
Richard

* ChangeLog
** V3
- simplify locking in the set pin logic
** V2
- fix bug in sysfs code on init error path
- rename ptp_setpin() to ptp_set_pinfunc()
- rename .setpin() to .verify() in the driver interface
- simplify ptp_find_pin() logic
- use correct test when checking whether the pin with the calibration function is being reprogrammed

Richard Cochran (9):
ptp: introduce programmable pins.
ptp: add the pin GET/SETFUNC ioctls to the testptp program.
ptp: expose the programmable pins via sysfs
ptp: drivers: set the number of programmable pins.
dp83640: trivial fixes
dp83640: correct the periodic output frequency
dp83640: implement programmable pin functions.
dp83640: let external input pins from the module parameters be
defaults.
dp83640: let the periodic pin from the module parameter be a default.

 Documentation/ABI/testing/sysfs-ptp              |   20 ++++
 Documentation/ptp/testptp.c                      |   58 +++++++++-
 drivers/net/ethernet/adi/bfin_mac.c              |    1 +
 drivers/net/ethernet/broadcom/tg3.c              |    1 +
 drivers/net/ethernet/freescale/fec_ptp.c         |    1 +
 drivers/net/ethernet/freescale/gianfar_ptp.c     |    1 +
 drivers/net/ethernet/intel/e1000e/ptp.c          |    1 +
 drivers/net/ethernet/mellanox/mlx4/en_clock.c    |    1 +
 drivers/net/ethernet/sfc/ptp.c                   |    1 +
 drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c |    1 +
 drivers/net/ethernet/ti/cpts.c                   |    1 +
 drivers/net/ethernet/tile/tilegx.c               |    1 +
 drivers/net/phy/dp83640.c                        |   93 +++++++++++++---
 drivers/ptp/ptp_chardev.c                        |  128 +++++++++++++++++++++-
 drivers/ptp/ptp_clock.c                          |   23 ++++
 drivers/ptp/ptp_ixp46x.c                         |    1 +
 drivers/ptp/ptp_pch.c                            |    1 +
 drivers/ptp/ptp_private.h                        |    8 ++
 drivers/ptp/ptp_sysfs.c                          |  115 +++++++++++++++++++
 include/linux/ptp_clock_kernel.h                 |   33 ++++++
 include/uapi/linux/ptp_clock.h                   |   39 ++++++-
 21 files changed, 509 insertions(+), 20 deletions(-)

1.7.10.4