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That hardware revision is no longer in production and > > > > is not available for new orders. All currently manufactured and shipped > > > > VAR-SOM-MX8MM modules integrate the NXP IW61x instead. > > > > > > This common problem, we met similar case. After replace new compenent, it > > > should be new boards, or new revision. > > > > > > I don't suggest directly replace it to broken old one. You can create dt > > > overlay files for new boards. > > > > > > Krzysztof Kozlowski: > > > how about other vendor handle similar case? Any guide line for > > > that? > > > > > > Frank > > > > > > > Thanks for the feedback! > > > > We understand the concern about potential regressions on older SOM > > revisions. However, since the wireless module is soldered on the SOM > > and not configurable, we are aligning the upstream device tree with > > the hardware revision that is currently in production. > > > > This change also aligns the i.MX8MM VAR-SOM with other VAR-SOM > > platforms already present in mainline (e.g. i.MX8MP, i.MX93), which > > use the IW61x wireless module as well. The intention is to keep the > > VAR-SOM family consistent in mainline with the hardware that is > > actively produced. Actually it becomes two boards. Change components is quite common. Direct change at dts is not friendly for old boards users. > > > > If there is a strong requirement to preserve an explicit description > > of the older Broadcom-based revision in mainline, we can evaluate > > adding a separate description. > > > > Best regards, > > Stefano > > Do you have any update about this topic? If can't auto detected, I think keep old dts, use overlay change to new one. For example, board.dtb you can rename board.dtb to board-revA.dtb new board.dtb, by apply verb.dtso to board-revA.dtb. Or you direct use board-revb.dtb. If change is big, you can create new one. Frank > > Thank you a lot, > Best Regards, > Stefano