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[POWERPC] Fix default clock for udbg_16550

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This patch makes it possible to provide 0 as the clock value for
udbg_16550, making it default to the standard 1.8432Mhz clock

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Benjamin Herrenschmidt 2006-07-04 14:11:23 +10:00 committed by Paul Mackerras
parent 8cffc6ac66
commit 171505dafe
1 changed files with 5 additions and 1 deletions
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arch/powerpc/kernel/udbg_16550.c
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@ -81,10 +81,14 @@ static int udbg_550_getc(void)
void udbg_init_uart(void __iomem *comport, unsigned int speed, void udbg_init_uart(void __iomem *comport, unsigned int speed,
unsigned int clock) unsigned int clock)
{ {
unsigned int dll, base_bauds = clock / 16; unsigned int dll, base_bauds;
if (clock == 0)
clock = 1843200;
if (speed == 0) if (speed == 0)
speed = 9600; speed = 9600;
base_bauds = clock / 16;
dll = base_bauds / speed; dll = base_bauds / speed;
if (comport) { if (comport) {