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authorAnton Vorontsov <avorontsov@ru.mvista.com>2007-07-31 00:38:43 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-31 15:39:40 -0700
commit6f166e3833d953f0acf77eb7d426840da9e1a87f (patch)
tree95a15d4662f41b7a6b86c05d2558de16a86bc27e /include/linux/spi
parent4ef7af50373778ee248a2493c9cf62a2299806a8 (diff)
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spidev supports more communications modes
The spidev driver doesn't currently expose all SPI communications modes to userspace. This passes them all through to the driver. Two of them are potentially troublesome, in the sense that they could cause hardware conflicts on shared busses. It might be appropriate to add some privilege checks for for those modes. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.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 'include/linux/spi')
-rw-r--r--include/linux/spi/spidev.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/spi/spidev.h b/include/linux/spi/spidev.h
index 7d700be..c93ef9d 100644
--- a/include/linux/spi/spidev.h
+++ b/include/linux/spi/spidev.h
@@ -35,6 +35,10 @@
#define SPI_MODE_2 (SPI_CPOL|0)
#define SPI_MODE_3 (SPI_CPOL|SPI_CPHA)
+#define SPI_CS_HIGH 0x04
+#define SPI_LSB_FIRST 0x08
+#define SPI_3WIRE 0x10
+#define SPI_LOOP 0x20
/*---------------------------------------------------------------------------*/