On Wed, Sep 03, 2025 at 01:53:00PM +0300, Andy Shevchenko wrote: > (Not sure, but SPI DesignWare requires programming SPI native chip selects > even > if the GPIO is used for that, this might have also some implications, but > here > it's for real 'purely speculative'.)
It is very common for SPI controllers to absolutely require setting a chip select in order to do a transfer, when using GPIO chip selects with such controllers the standard practice is to just not mux out the chip select signal from the controller and do everything in software. The IP will be doing it's thing with it's chip select signal but that signal is never actually connected to anything.
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