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spi: Ensure that CS line is in non-active state after spi_setup() 

Some devices samples state of the chip select signal during power up
and act differently based on this state, so SPI core should ensure
that CS line is driven in non-active state after spi_setup().

Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Ivan T. Ivanov 2015-03-13 18:43:49 +02:00 committed by Mark Brown
parent c517d838eb
commit 1a7b7ee72c
1 changed files with 2 additions and 0 deletions
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2
drivers/spi/spi.c
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@ -1893,6 +1893,8 @@ int spi_setup(struct spi_device *spi)
if (!spi->max_speed_hz)
spi->max_speed_hz = spi->master->max_speed_hz;
spi_set_cs(spi, false);
if (spi->master->setup)
status = spi->master->setup(spi);