On 06/11/2023 19:57, Hugo Villeneuve wrote: > From: Hugo Villeneuve <hvilleneuve@xxxxxxxxxxxx> > > The following warning is shown when probing device: > > pca953x 1-0020: supply vcc not found, using dummy regulator > > Add fixed 3.3v regulator as vcc supply to silence the warning. > This is not really a warning. It's perfectly fine to use dummy regulator. Adding such fixed supply has sense in following cases: 1. Bindings require the supply, 2. This is in fact exactly that supply (verified on schematics). Best regards, Krzysztof