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[POWERPC] cpm2: Fix off-by-one error in setbrg(). 

The hardware adds one to the BRG value to get the divider, so it must
be subtracted by software.  Without this patch, characters will occasionally
be corrupted.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Scott Wood 2007-09-05 14:29:10 -05:00 committed by Kumar Gala
parent 36c50f729b
commit 83fcdb4b35
1 changed files with 1 additions and 1 deletions
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2
arch/powerpc/sysdev/cpm2_common.c
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@ -102,7 +102,7 @@ cpm_setbrg(uint brg, uint rate)
brg -= 4;
}
bp += brg;
*bp = ((BRG_UART_CLK / rate) << 1) | CPM_BRG_EN;
out_be32(bp, (((BRG_UART_CLK / rate) - 1) << 1) | CPM_BRG_EN);
cpm2_unmap(bp);
}