Commit 1a7b7ee7 authored Mar 13, 2015 by Ivan T. Ivanov Committed by Mark Brown Mar 16, 2015

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>

parent c517d838

drivers/spi/spi.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -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);