On Mon, Aug 1, 2022 at 3:52 AM Potin Lai <potin.lai.pt@xxxxxxxxx> wrote: > On 7/31/22 20:09, Jonathan Cameron wrote: ... > In our hardware board, we have "ti,hdc1080" as main source, and "silabs,si7020" > for 2nd source. This two chip are locate at same bus and same slave address, > and we want to use multiple compatibles to support both chips with single device > node in device tree. > > Ex: > compatible = "ti,hdc1099", "silabs,si7020"; This is simply broken DT, you must not put incompatible hardware on the same compatible string. DT is by definition the description of a certain platform. What you showed is a combination of incompatible chips in a single DT. > In order to support this, I need to add ID checking mechanism into the current > hdc100x driver, so the si7020 chip will fail to probe with hdc100x driver > (because the ID checking is not failed), then success probe with si7020. > > Base on you explanation, it looks multiple compatibles is not suitable in this > case? Would you mind advise us what would be the better approach for our case? If I may advise... fix your DT by dropping the wrong compatible item. -- With Best Regards, Andy Shevchenko
