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authorDavid Brownell <david-b@pacbell.net>2007-07-17 04:04:02 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-17 10:23:04 -0700
commitdccd573bb02aa011a4a7146c02c409ac0bd722a0 (patch)
tree743eeca4fbbea8272ca4f341b806d776e404d704 /include/linux/spi
parentff294cba8a62fa8334b88692da6d48683900f015 (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')
-rw-r--r--include/linux/spi/spi_bitbang.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/spi/spi_bitbang.h b/include/linux/spi/spi_bitbang.h
index 9dbca629dcfb..b8db32cea1de 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;