Merge branch 'net-freescale-fix-ptp_extts_request2-for-qoriq-1588'

Vincent Jardin via says:

====================
net: freescale: fix PTP_EXTTS_REQUEST2 for QorIQ 1588

Since commit 7c571ac57d9d ("net: ptp: introduce .supported_extts_flags
to ptp_clock_info"), the PTP core rejects every PTP_EXTTS_REQUEST2
request for a driver that does not set .supported_extts_flags. The three
users of the QorIQ 1588 timer (dpaa2-ptp, enetc, ptp_qoriq) do not set
it, so linuxptp ts2phc cannot arm their external timestamp inputs.

The timer timestamps the rising edge only, since ptp_qoriq_init() clears
ETEP1 and ETEP2. Each patch declares PTP_RISING_EDGE | PTP_STRICT_FLAGS
for one driver.

With PTP_STRICT_FLAGS declared, the core checks the edge flags of the
legacy PTP_EXTTS_REQUEST ioctl too: a legacy request for the falling
edge, or for both edges, now fails with -EOPNOTSUPP instead of being
timestamped on the rising edge. Each commit message says so.

Patch 1 fixes the failure seen on an LX2160A board.
Patches 2 and 3 are build-tested/code review only.
====================

Link: https://patch.msgid.link/20261009-for-upstream-qoriq-ptp-extts-flags-v2-0-0f4eeff2295d@free.fr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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