dt-bindings: ethernet: eswin: relax internal delay model to range-based constraints

Relax internal delay constraints for EIC7700 Ethernet binding.

Replace fixed enumeration of rx-internal-delay-ps and tx-internal-delay-ps
with a range-based definition (0-2540 ps, 20 ps steps) to reflect actual
hardware capability.

Mark rx/tx internal delay properties as optional, as they are board-
specific tuning parameters rather than mandatory configuration.

Update the device tree example to align with the relaxed constraint model
and remove delay properties from the example to avoid implying they are
required.

No functional change to existing DT users.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Zhi Li <lizhi2@eswincomputing.com>
Link: https://patch.msgid.link/20260707064131.1282-1-lizhi2@eswincomputing.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

0 files changed, 0 insertions, 0 deletions