This is a note to let you know that I've just added the patch titled
spi: spi-ath79: fix initial GPIO CS line setup
to the 3.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
spi-spi-ath79-fix-initial-gpio-cs-line-setup.patch
and it can be found in the queue-3.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 61d1cf163c8653934cc8cd5d0b2a562d0990c265 Mon Sep 17 00:00:00 2001
From: Gabor Juhos <juhosg@xxxxxxxxxxx>
Date: Sun, 2 Mar 2014 20:54:42 +0100
Subject: spi: spi-ath79: fix initial GPIO CS line setup
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));
Patches currently in stable-queue which might be from juhosg@xxxxxxxxxxx are
queue-3.13/spi-spi-ath79-fix-initial-gpio-cs-line-setup.patch
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