[PATCH 3.13 084/149] spi: spi-ath79: fix initial GPIO CS line setup

From: Greg Kroah-Hartman
Date: Thu Mar 20 2014 - 21:05:41 EST


3.13-stable review patch. If anyone has any objections, please let me know.

------------------

From: Gabor Juhos <juhosg@xxxxxxxxxxx>

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@xxxxxxxxxxx>
Signed-off-by: Gabor Juhos <juhosg@xxxxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/spi/spi-ath79.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/spi/spi-ath79.c
+++ b/drivers/spi/spi-ath79.c
@@ -132,9 +132,9 @@ static int ath79_spi_setup_cs(struct 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));


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