spi: spi-fsl-dspi: Bug fix incorrect CS de-assert

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SPI chip select signal need to keep asserted between several
spi_transfer in the same spi_message usually.
But the driver will de-assert CS signal and the assert it between
serval spi_transfer in the same spi_message under some condiations.
This patch fix the bug.

Here is an example:
Assume you have two variables like the following,
struct spi_transfer a;
struct spi_transfer b;
if you send a spi_message only includes 'a' first,
and then you send a spi_message includes 'a' and 'b'
but without resetting 'a'.
Driver will de-assert CS and then assert CS between 'a' and 'b'.

Signed-off-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

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Haikun Wang 2015-05-13 18:12:15 +08:00 • committed by Mark Brown

parent b787f68c36

commit 9deef024a1

1 changed files with 2 additions and 2 deletions

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drivers/spi/spi-fsl-dspi.c

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