Re: [PATCH net-next v7 3/3] dpll: zl3073x: add PTP clock support

[Vadim Fedorenko <vadim.fedorenko@linux.dev>]

On 11/08/2026 14:47, Ivan Vecera wrote:
> Add PTP clock support for the ZL3073x DPLL driver. A PTP clock device
> is registered for each DPLL channel regardless of the initial channel
> state, providing gettimex64, settime64, adjtime, adjfine, adjphase
> and getmaxphase callbacks.
> 
> Callback availability depends on the current channel state:
> - adjfine: when NCO pin is connected (returns -EOPNOTSUPP otherwise)
> - adjphase: available when tracking a reference, uses TIE write
> - adjtime: always available and uses
>    * phase step for sub-second deltas when NCO pin is connected
>    * TIE write when tracking a reference
>    * plain ToD read-modify-write otherwise
> - gettime/settime: always available
> 
> The adjtime callback splits multi-second adjustments into a ToD
> read-modify-write for the seconds part and a sub-second mechanism
> (phase step or TIE write) for the remainder. On partial failure
> where seconds were already committed, success is returned to
> prevent the PTP servo from retrying and applying seconds again.
> 
> All PTP callbacks are serialized by the existing per-DPLL zldpll->lock
> mutex, which is also used by DPLL pin and device callbacks.
> 
> Reviewed-by: Petr Oros <poros@redhat.com>
> Tested-by: Chris du Quesnay <Chris.duQuesnay@microchip.com>
> Signed-off-by: Ivan Vecera <ivecera@redhat.com>

It's a bit weird on formatting because of functions reordering.
Anyways, main parts LGTM

Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>