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| author | Justin Clacherty <justin@redfish-group.com> | 2007-01-26 00:56:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-01-26 13:50:57 -0800 |
| commit | 7f6ee1adc75bf31d1b76814338f76a88e653cb60 (patch) | |
| tree | be8d60f961ad853dabc504a0a030694fb31b7aeb | |
| parent | 8736b9270c2f8993ca44c30f64d4c6d25e379687 (diff) | |
| download | linux-3.10-7f6ee1adc75bf31d1b76814338f76a88e653cb60.tar.gz linux-3.10-7f6ee1adc75bf31d1b76814338f76a88e653cb60.tar.bz2 linux-3.10-7f6ee1adc75bf31d1b76814338f76a88e653cb60.zip | |
[PATCH] spi: fix error setting the spi mode in pxa2xx_spi.c
Currently the spi mode can be set to the wrong mode if you are switching
from any mode other than mode 0. This is because the mode is set using a
bitwise or on uncleared bits. The following patch clears the mode bits
before setting the new mode. I've also modified it to use the appropriate
defines from pxa-regs.h for readability.
Signed-off-by: Justin Clacherty <justin@redfish-group.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/spi/pxa2xx_spi.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c index 6ed3f1da929..8b41f9cc256 100644 --- a/drivers/spi/pxa2xx_spi.c +++ b/drivers/spi/pxa2xx_spi.c @@ -1169,8 +1169,9 @@ static int setup(struct spi_device *spi) spi->bits_per_word - 16 : spi->bits_per_word) | SSCR0_SSE | (spi->bits_per_word > 16 ? SSCR0_EDSS : 0); - chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) << 4) - | (((spi->mode & SPI_CPOL) != 0) << 3); + chip->cr1 &= ~(SSCR1_SPO | SSCR1_SPH); + chip->cr1 |= (((spi->mode & SPI_CPHA) != 0) ? SSCR1_SPH : 0) + | (((spi->mode & SPI_CPOL) != 0) ? SSCR1_SPO : 0); /* NOTE: PXA25x_SSP _could_ use external clocking ... */ if (drv_data->ssp_type != PXA25x_SSP) |