dt-bindings: dpll: add ref-sync-sources property

Add ref-sync-sources phandle-array property to the dpll-pin schema
allowing board designers to declare which input pins can serve as
sync sources in a Reference-Sync pair.  A Ref-Sync pair consists of
a clock reference and a low-frequency sync signal where the DPLL locks
to the clock but phase-aligns to the sync reference.

Update both examples in the Microchip ZL3073x binding to demonstrate
the new property with a 1 PPS sync source paired to a clock source.

Reviewed-by: Petr Oros <poros@redhat.com>
Reviewed-by: Prathosh Satish <Prathosh.Satish@microchip.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Ivan Vecera <ivecera@redhat.com>
Link: https://patch.msgid.link/20260408102716.443099-5-ivecera@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

0 files changed, 0 insertions, 0 deletions