diff options
author | Michael Hennerich <michael.hennerich@analog.com> | 2009-04-06 22:00:32 -0400 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-07 11:31:04 -0400 |
commit | 7513e006c64fbe2f43aef2139c8c1f2b1a9cb6b9 (patch) | |
tree | 44817ca1febd0599ea8bff50825fc58568f4e7c3 /drivers/spi/spi_bfin5xx.c | |
parent | 8cf5858c51f88208fe56b195251ab4f21265386c (diff) |
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 'drivers/spi/spi_bfin5xx.c')
-rw-r--r-- | drivers/spi/spi_bfin5xx.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi_bfin5xx.c b/drivers/spi/spi_bfin5xx.c index e440718b3209..a3e06283f74d 100644 --- a/drivers/spi/spi_bfin5xx.c +++ b/drivers/spi/spi_bfin5xx.c | |||
@@ -158,6 +158,9 @@ static u16 hz_to_spi_baud(u32 speed_hz) | |||
158 | if ((sclk % (2 * speed_hz)) > 0) | 158 | if ((sclk % (2 * speed_hz)) > 0) |
159 | spi_baud++; | 159 | spi_baud++; |
160 | 160 | ||
161 | if (spi_baud < MIN_SPI_BAUD_VAL) | ||
162 | spi_baud = MIN_SPI_BAUD_VAL; | ||
163 | |||
161 | return spi_baud; | 164 | return spi_baud; |
162 | } | 165 | } |
163 | 166 | ||