On Sun, Feb 27, 2022 at 11:00:35AM +0100, Christophe Leroy wrote:
> + if (!status && spi->mode & SPI_TRAILING) {
> + struct spi_transfer t = {
> + .len = 1,
> + .tx_buf = "",
> + .bits_per_word = 4
> + };
> +
> + status = fsl_spi_setup_transfer(spi, &t);
> + if (!status)
> + status = fsl_spi_bufs(spi, &t, 0);
> + }
> + m->status = status;
This seems to be begging for a generic implementation in the core rather
than being driver specific - drivers would for the most part need
updating to advertise less than 8 bit per word transfers but the basic
operation isn't really device specific and it pretty much fits with the
existing interfaces.
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