On Thu, Mar 30, 2023 at 12:33:57PM +0200, Philipp Zabel wrote: > Allow dynamically switching data size between transfers. > > Signed-off-by: Philipp Zabel <p.zabel@xxxxxxxxxxxxxx> > --- > drivers/spi/stm32_spi.c | 50 ++++++++++++++++++++++++++++++++--------- > 1 file changed, 39 insertions(+), 11 deletions(-) > > diff --git a/drivers/spi/stm32_spi.c b/drivers/spi/stm32_spi.c > index 0d7407c279a2..1ac86fbe11e6 100644 > --- a/drivers/spi/stm32_spi.c > +++ b/drivers/spi/stm32_spi.c [...] > @@ -543,6 +570,7 @@ static int stm32_spi_probe(struct device *dev) > master->transfer = stm32_spi_transfer; > master->mem_ops = &stm32_spi_mem_ops; > > + master->bits_per_word_mask = stm32_spi_get_bpw_mask(priv); This has to be moved down a few lines, after the clock is enabled and the device is reset. I'll fix this in v2. regards Philipp