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authorDavid Brownell <dbrownell@users.sourceforge.net>2009-06-18 03:26:04 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-06-19 00:03:42 +0400
commite7db06b5d5afcef15c4c3e61c3a7441ed7ad1407 (patch)
treec0d1e01d49fdb3f288da28ffc3b349810c4e1b61 /include/linux/spi
parent7d0771970c51e736758525dd71fb82dd036b823a (diff)
downloadlinux-e7db06b5d5afcef15c4c3e61c3a7441ed7ad1407.tar.xz
spi: move more spi_setup() functionality into core
Move some common spi_setup() error checks into the SPI framework from the spi_master controller drivers: - Add a new "mode_bits" field to spi_master - Use that in spi_setup to validate the spi->mode value being requested. Setting this new field is now mandatory for any controller supporting more than vanilla SPI_MODE_0. - Update all spi_master drivers to: * Initialize that field * Remove current spi_setup() checks using that value. This is a net minor code shrink. 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.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h
index 0db5d64fc5e8..9c4cd27f4685 100644
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -245,6 +245,9 @@ struct spi_master {
*/
u16 dma_alignment;
+ /* spi_device.mode flags understood by this controller driver */
+ u16 mode_bits;
+
/* Setup mode and clock, etc (spi driver may call many times).
*
* IMPORTANT: this may be called when transfers to another