I'm just catching up with this.

Really. Truly. Please -- Include the maintainer on CC for such patches!

In case you don't know who that is, you can always consult the MAINTAINERS file.

There you will find the following entry.

    PTP HARDWARE CLOCK SUPPORT
    M:      Richard Cochran [off-list ref]
    L:      netdev@vger.kernel.org
    S:      Maintained
    W:      http://linuxptp.sourceforge.net/

On Thu, Oct 22, 2020 at 02:39:35AM +0300, Vladimir Oltean wrote:

On Mon, Oct 19, 2020 at 07:24:33PM +0200, Christian Eggers wrote:

quoted

The PTP hardware performs internal detection of PTP frames (likely
similar as ptp_classify_raw() and ptp_parse_header()). As these filters
cannot be disabled, the current delay mode (E2E/P2P) and the clock mode
(master/slave) must be configured via sysfs attributes.

This is a complete no-go.  NAK.

Richard