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

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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 <[email protected]>
Signed-off-by: Mark Brown <[email protected]>
This commit is contained in:
Andrey Vostrikov 2016-04-05 15:33:14 +03:00 • committed by Mark Brown
commit 92dc20d83a
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-fsl-dspi.c
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@ -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;