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

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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);
}