spi: spi-fsl-dspi: Fix per transfer cs_change handling

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As of 92dc20d83a, transfer->cs_change has
been supported for non-last transfers, but not for last transfer.

This change brings handling of cs_change in line with the specification in
spi.h, implementing handling of transfer->cs_change for all transfers.

The value for CMD FIFO is precalculated with transfer->cs_change field
taken into account, allowing for CS de-activate between transfers and
keeping CS activated after last transfer.

Signed-off-by: Esben Haabendal <eha@deif.com>
Acked-by: Martin Hundebøll <martin@geanix.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

...

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Esben Haabendal 2018-06-20 09:34:33 +02:00 • committed by Mark Brown

parent 4779f23d1a

commit 9e1dc9bd09

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1 changed files with 40 additions and 28 deletions

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drivers/spi/spi-fsl-dspi.c

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