From: Hubert Feurstein <h.feurst...@gmail.com> Date: Tue, 20 Aug 2019 10:48:29 +0200
> From: Hubert Feurstein <h.feurst...@gmail.com> > > Changelog: > v3: mv88e6xxx_smi_indirect_write: forward ptp_sts only on the last write > Copied Miroslav Lichvar because of PTP offset compensation patch > v2: Added patch for PTP offset compensation > Removed mdiobus_write_sts as there was no user > Removed ptp_sts_supported-boolean and introduced flags instead > > With this patchset the phc2sys synchronisation precision improved to +/-555ns > on > an IMX6DL with an MV88E6220 switch attached. > > This patchset takes into account the comments from the following discussions: > - https://lkml.org/lkml/2019/8/2/1364 > - https://lkml.org/lkml/2019/8/5/169 > > Patch 01 adds the required infrastructure in the MDIO layer. > Patch 02 adds additional PTP offset compensation. > Patch 03 adds support for the PTP_SYS_OFFSET_EXTENDED ioctl in the mv88e6xxx > driver. > Patch 04 adds support for the PTP system timestamping in the imx-fec driver. It looks like there is still some active discussion about these changes and there will likely be another spin.
