On Thu, 2024-06-06 at 18:31 -0300, Marcelo Schmitt wrote: ... > > > > When is a driver version check needed? > Yes, older versions of SPI-Engine won't support this, but the patch set should > cause no regression. Even if loading the current ad4000 driver with > older SPI-Engine HDL and driver, the ADC driver would get a warn (or error?) > and do what's possible without MOSI idle feature (probably only be able to do > reg access) or fail probing. > Maybe I'm missing something but with the patchset we unconditionally set SPI_MOSI_IDLE_HIGH. So if we load an hdl which does not support it things will apparently be ok but it won't actually work, right? If I'm right we should have a bit in a RO config_register telling us that the feature is being supported or not. That way we only set the mode bit if we do support it... - Nuno Sá
