On 06/19, Mark Brown wrote: > On Tue, Jun 18, 2024 at 08:10:44PM -0300, Marcelo Schmitt wrote: > > > First replies to v3 brought the idea of having a feature detection mechanism. > > I didn't really get how to do that. If feature detection is required, can > > somebody please provide some pointers on how to implement that? > > Look at the checks in spi_setup() for bad_bits. Yes, I added MOSI idle configuration bits to bad_bits so spi_setup() fails if the feature is requested but not supported: bad_bits = spi->mode & ~(spi->controller->mode_bits | SPI_CS_WORD | SPI_NO_TX | SPI_NO_RX | SPI_MOSI_IDLE_LOW | SPI_MOSI_IDLE_HIGH); am I still missing anything? Thanks, Marcelo