Merge branch 'dpll-zl3073x-add-ptp-clock-support'

Ivan Vecera says:

====================
dpll: zl3073x: add PTP clock support

Add PTP hardware clock support to the zl3073x DPLL driver.

Patch 1 scales the poll sleep interval in zl3073x_poll_zero_u8()
proportionally to the timeout to avoid excessive bus traffic for
the longer PTP-related timeouts.

Patch 2 adds low-level channel operations for ToD read/write/adjust,
output phase step, delta frequency offset write and TIE write as
building blocks for PTP callbacks.

Patch 3 registers a PTP clock device for each DPLL channel with
gettimex64, settime64, adjtime, adjfine, adjphase and getmaxphase
callbacks. Callback availability adapts to the current channel
state - adjfine requires NCO pin connected, adjphase uses TIE write
when tracking a reference, and adjtime selects the appropriate
mechanism automatically. Periodic output support will be added in a
follow-up series.
====================

Link: https://patch.msgid.link/20260814082656.306534-1-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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