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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2012-02-09 22:21:45 +0100
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-07-10 15:28:56 +0100
commit05644147064acabb8587c4cbd690047494f7b3a1 (patch)
treeaa56a2853bce14e640a52cdf88f81084e80580d8 /drivers/spi
parent619ac8d3e582ccd806f24dcfc369c4c250ca9814 (diff)
downloadlinux-05644147064acabb8587c4cbd690047494f7b3a1.tar.bz2
spi/gpio: start with CS non-active
The chip select line was configured as output with the initial value being active explicitly. It was later deasserted during spi_bitbang_setup() without any clock activity in between. So it makes no sense to activate the device at all and the chip select line can better start non-active. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-gpio.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/spi/spi-gpio.c b/drivers/spi/spi-gpio.c
index 0094c645ff0d..0b56cfc71fab 100644
--- a/drivers/spi/spi-gpio.c
+++ b/drivers/spi/spi-gpio.c
@@ -235,7 +235,8 @@ static int spi_gpio_setup(struct spi_device *spi)
status = gpio_request(cs, dev_name(&spi->dev));
if (status)
return status;
- status = gpio_direction_output(cs, spi->mode & SPI_CS_HIGH);
+ status = gpio_direction_output(cs,
+ !(spi->mode & SPI_CS_HIGH));
}
}
if (!status)