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| author | Gabor Juhos <juhosg@openwrt.org> | 2014-03-02 20:54:42 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-03-23 21:38:16 -0700 |
| commit | cb67b44a0ddb8c1387ad2df82508b17b9b3f546d (patch) | |
| tree | a96d78756bab1273b6acc64652244f7b673c85f3 /drivers/spi | |
| parent | 2e44c866bfcea9dcd77dda2c77f03f6d042aade7 (diff) | |
| download | linux-3.10-cb67b44a0ddb8c1387ad2df82508b17b9b3f546d.tar.gz linux-3.10-cb67b44a0ddb8c1387ad2df82508b17b9b3f546d.tar.bz2 linux-3.10-cb67b44a0ddb8c1387ad2df82508b17b9b3f546d.zip | |
spi: spi-ath79: fix initial GPIO CS line setup
commit 61d1cf163c8653934cc8cd5d0b2a562d0990c265 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-ath79.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/spi/spi-ath79.c b/drivers/spi/spi-ath79.c index e504b763605..23f1ba6e9cc 100644 --- a/drivers/spi/spi-ath79.c +++ b/drivers/spi/spi-ath79.c @@ -132,9 +132,9 @@ static int ath79_spi_setup_cs(struct spi_device *spi) flags = GPIOF_DIR_OUT; if (spi->mode & SPI_CS_HIGH) - flags |= GPIOF_INIT_HIGH; - else flags |= GPIOF_INIT_LOW; + else + flags |= GPIOF_INIT_HIGH; status = gpio_request_one(cdata->gpio, flags, dev_name(&spi->dev)); |