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authorMichael Hennerich <michael.hennerich@analog.com>2009-04-07 04:00:32 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2009-04-07 17:31:04 +0200
commit7513e006c64fbe2f43aef2139c8c1f2b1a9cb6b9 (patch)
tree44817ca1febd0599ea8bff50825fc58568f4e7c3 /arch/blackfin
parentBlackfin SPI Driver: ensure cache coherency before doing DMA (diff)
downloadlinux-7513e006c64fbe2f43aef2139c8c1f2b1a9cb6b9.tar.xz
linux-7513e006c64fbe2f43aef2139c8c1f2b1a9cb6b9.zip
Blackfin SPI Driver: Fix erroneous SPI Clock divisor calculation
Fix erroneous SPI Clock divisor calculation. Make sure SPI_BAUD is always >= 2. Writing a value of 0 or 1 to the SPI_BAUD register disables the serial clock. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/blackfin')
-rw-r--r--arch/blackfin/include/asm/bfin5xx_spi.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/bfin5xx_spi.h b/arch/blackfin/include/asm/bfin5xx_spi.h
index 0292d58f9362..ea2d24af9542 100644
--- a/arch/blackfin/include/asm/bfin5xx_spi.h
+++ b/arch/blackfin/include/asm/bfin5xx_spi.h
@@ -11,6 +11,8 @@
#ifndef _SPI_CHANNEL_H_
#define _SPI_CHANNEL_H_
+#define MIN_SPI_BAUD_VAL 2
+
#define SPI_READ 0
#define SPI_WRITE 1