On Wed, Apr 26, 2023 at 09:19:29AM +0200, Rasmus Villemoes wrote: > I did consider that approach, but rejected it because it wouldn't work > with mixing native and gpio chip selects. Say, somebody uses SS0 > natively, but then also have four additional gpios. Then chipselect 4 > would end up activating both the SS0 pin as well as the gpio, selecting > both devices. > I don't know if that's really a realistic scenario. But at least I think > the driver should then somehow have a way to indicate to the core that > one should either use native or gpio chip selects, but not a mix. I'm not sure this is sensible, it'll be a fairly rare situation and we don't want to preclude using the built in chip select functionality for some of the chip selects. In a situation like this we only need to have a single chip select to be managed as a GPIO rather than all of them, which I'd expect to end up handled in the DT by not allocating that chip select number.
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