spi: spi-fsl-dspi: Fix cs_change handling in message transfer

There are use cases when chip select should be triggered between transfers
in single SPI message. Current implementation does this only on last
transfer in message ignoring cs_change value provided in current transfer.

Signed-off-by: Andrey Vostrikov <andrey.vostrikov@cogentembedded.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c
index 39412c9097c6a240466c51c941ec890a4612542e..c1a2d747b24686cb835541c68bb2f20f2304d009 100644 (file)
--- a/drivers/spi/spi-fsl-dspi.c
+++ b/drivers/spi/spi-fsl-dspi.c
@@ -385,8 +385,8 @@ static int dspi_transfer_one_message(struct spi_master *master,
                dspi->cur_chip = spi_get_ctldata(spi);
                dspi->cs = spi->chip_select;
                dspi->cs_change = 0;
-               if (dspi->cur_transfer->transfer_list.next
-                               == &dspi->cur_msg->transfers)
+               if (list_is_last(&dspi->cur_transfer->transfer_list,
+                                &dspi->cur_msg->transfers) || transfer->cs_change)
                        dspi->cs_change = 1;
                dspi->void_write_data = dspi->cur_chip->void_write_data;