Support the CPTS as a PTP Hardware Clock

This patch series adds support for the Common Platform Time Sync (CPTS) found on TI SoCs such as the am335x (like the popular BeagleBone) and the dm814x. The patch series enables hardware time stamping and a PTP Hardware Clock.

* Changes in V3
- Performs clock frequency adjustment in software
- Move the HWTSTAMP ioctl into the CPSW code
- Handle the two different CPSW versions

This work has been tested using the linuxptp PTP stack, and it seems to be working quite well. Using the CPSW Ethernet ports (and the CPTS) is not yet possible in mainline Linux due to missing device tree support. However, this support is expected to appear in v3.8 in the form of the following patches.

http://www.spinics.net/lists/arm-kernel/msg203749.html

This third version of the patch series incorporates ideas taken from Mugunthan's driver, namely the CPSW versioning support and keeping the HWTSTAMP ioctl within the CPSW code.

http://thread.gmane.org/gmane.linux.network/246082

The first patch adds multicast MAC support to the CPSW. Patches two and three are cleanups to bring the code more in line with the TRM. Patches four and five add CPSW versioning support. The sixth patch add the new CPTS code, and patches seven through nine add device tree support for CPTS variables. The last patch hooks the CPSW to the CPTS and adds HWTSTAMP support into the CPSW.

Thanks,
Richard

Mugunthan V N (1):
drivers: net: ethernet: cpsw: add multicast address to ALE table

Richard Cochran (9):
cpsw: rename register banks to match the reference manual
cpsw: add missing fields to the CPSW_SS register bank.
cpsw: remember the silicon version
cpsw: support both silicon versions
cpts: introduce time stamping code and a PTP hardware clock.
cpsw: add a DT field for the cpts offset
cpsw: add a DT field for the active time stamping port
cpts: specify the input clock frequency via DT
cpsw: support the HWTSTAMP ioctl and the CPTS

 Documentation/devicetree/bindings/net/cpsw.txt |   20 +-
 drivers/net/ethernet/ti/Kconfig                |    8 +
 drivers/net/ethernet/ti/Makefile               |    2 +-
 drivers/net/ethernet/ti/cpsw.c                 |  373 +++++++++++++++++++--
 drivers/net/ethernet/ti/cpsw_ale.c             |   31 ++-
 drivers/net/ethernet/ti/cpsw_ale.h             |    1 +
 drivers/net/ethernet/ti/cpts.c                 |  427 ++++++++++++++++++++++++
 drivers/net/ethernet/ti/cpts.h                 |  146 ++++++++
 include/linux/platform_data/cpsw.h             |    4 +
 9 files changed, 979 insertions(+), 33 deletions(-)
 create mode 100644 drivers/net/ethernet/ti/cpts.c
 create mode 100644 drivers/net/ethernet/ti/cpts.h

1.7.2.5