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 <[email protected]> Signed-off-by: Mark Brown <[email protected]>
cbmeeks · Mar 16, 2015 · 1a7b7ee · 1a7b7ee
1 parent c517d83
commit 1a7b7ee
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
@@ -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);