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| author | Mike Frysinger <michael.frysinger@analog.com> | 2007-12-04 23:45:14 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-12-05 09:21:19 -0800 |
| commit | 2ed355165ff4ec834a75770f2a15dc87f5e06088 (patch) | |
| tree | 9d409b8a624916225f07791d322dd6ca9eea4521 /drivers/spi | |
| parent | fad91c890909aabab0d9858d50f3c8394ee16b21 (diff) | |
| download | linux-stable-2ed355165ff4ec834a75770f2a15dc87f5e06088.tar.gz linux-stable-2ed355165ff4ec834a75770f2a15dc87f5e06088.tar.bz2 linux-stable-2ed355165ff4ec834a75770f2a15dc87f5e06088.zip | |
spi: spi_bfin, don't bypass spi framework
Prevent people from setting bits in ctl_reg that the SPI framework already
handles, hopefully we can one day drop ctl_reg completely
Signed-off-by: Mike Frysinger <michael.frysinger@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi_bfin5xx.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index c2d51cf3c639..8e4ea8906dc7 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c @@ -998,6 +998,18 @@ static int setup(struct spi_device *spi) /* chip_info isn't always needed */ if (chip_info) { + /* Make sure people stop trying to set fields via ctl_reg + * when they should actually be using common SPI framework. + * Currently we let through: WOM EMISO PSSE GM SZ TIMOD. + * Not sure if a user actually needs/uses any of these, + * but let's assume (for now) they do. + */ + if (chip_info->ctl_reg & (SPE|MSTR|CPOL|CPHA|LSBF|SIZE)) { + dev_err(&spi->dev, "do not set bits in ctl_reg " + "that the SPI framework manages\n"); + return -EINVAL; + } + chip->enable_dma = chip_info->enable_dma != 0 && drv_data->master_info->enable_dma; chip->ctl_reg = chip_info->ctl_reg; |