Hi! On 20/03/2021 12:28, Linus Walleij wrote: > This is starting to look right :) > > But use the top-level board DT compatible to determine that > hiearchy is needed, and implement a per-soc child_to_parent_hwirq() > and do not attempt to get the IRQs from the device tree. No! We have all 3 variants on the same board (without IRQs as well)! Even AXXIA has 1-parent and 8-parent variant in the same upstream DT! -- Best regards, Alexander Sverdlin.