diff options
| author | David Brownell <david-b@pacbell.net> | 2007-07-17 04:04:02 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-07-17 10:23:04 -0700 |
| commit | dccd573bb02aa011a4a7146c02c409ac0bd722a0 (patch) | |
| tree | 743eeca4fbbea8272ca4f341b806d776e404d704 /include/linux/spi/spi_bitbang.h | |
| parent | ff294cba8a62fa8334b88692da6d48683900f015 (diff) | |
SPI controller drivers: check for unsupported modes
Minor SPI controller driver updates: make the setup() methods reject
spi->mode bits they don't support, by masking aginst the inverse of bits
they *do* support. This insures against misbehavior later when new mode
bits get added.
Most controllers can't support SPI_LSB_FIRST; more handle SPI_CS_HIGH.
Support for all four SPI clock/transfer modes is routine.
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 'include/linux/spi/spi_bitbang.h')
| -rw-r--r-- | include/linux/spi/spi_bitbang.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h index 9dbca629dcf..b8db32cea1d 100644 --- a/include/linux/spi/spi_bitbang.h +++ b/include/linux/spi/spi_bitbang.h @@ -26,6 +26,7 @@ struct spi_bitbang { struct list_head queue; u8 busy; u8 use_dma; + u8 flags; /* extra spi->mode support */ struct spi_master *master; |