From: Andrew Lunn <and...@lunn.ch> Date: Wed, 14 Feb 2018 01:07:41 +0100
> This patchset adds support for using the PTP hardware in switches > supported by the mv88e6xxx driver. The code was produces in > collaboration with Brandon Streiff doing the initial implementation, > and then Richard Cochran and Andrew Lunn making further changes and > cleanups. > > The code is sufficient to use ptp4l on a single DSA interface, either > as a master or a slave. Due to the use of an MDIO bus to access the > switch, reading hardware timestamps is slower than what ptp4l > expects. Thus it is necessary to use the option > --tx_timestamp_timeout=32. Heavy use of ethtool -S, or bridge fdb show > can also upset ptp4l. Patches to address this will follow. > > Further work is requires to support bridges using Boundary Clock or > Transparent Clock mode. > > Since the RFC, an overflow bug has been fixed. Brandon Streiff > has also Acked-by: the updates to his initial patchset. Looks great, series applied, thanks!