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spi: spi-ath79: fix initial GPIO CS line setup

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The 'ath79_spi_setup_cs' function initializes the chip
select line of a given SPI device in order to make sure
that the device is inactive.

If the SPI_CS_HIGH bit is set for a given device, it
means that the CS line of that device is active HIGH
so it must be set to LOW initially. In case of GPIO
CS lines, the 'ath79_spi_setup_cs' function does the
opposite of that due to the wrong GPIO flags.

Fix the code to use the correct GPIO flags.

Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Mark Brown <broonie@linaro.org>
Cc: stable@vger.kernel.org
This commit is contained in:
Gabor Juhos 2014-03-02 20:54:42 +01:00 committed by Mark Brown
parent 38dbfb59d1
commit 61d1cf163c
1 changed files with 2 additions and 2 deletions
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4
drivers/spi/spi-ath79.c
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@ -132,9 +132,9 @@ static int ath79_spi_setup_cs(struct spi_device *spi)
flags = GPIOF_DIR_OUT; flags = GPIOF_DIR_OUT;
if (spi->mode & SPI_CS_HIGH) if (spi->mode & SPI_CS_HIGH)
flags |= GPIOF_INIT_HIGH;
else
flags |= GPIOF_INIT_LOW; flags |= GPIOF_INIT_LOW;
else
flags |= GPIOF_INIT_HIGH;
status = gpio_request_one(cdata->gpio, flags, status = gpio_request_one(cdata->gpio, flags,
dev_name(&spi->dev)); dev_name(&spi->dev));