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[POWERPC] Fix default clock for udbg_16550
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>
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@ -81,10 +81,14 @@ static int udbg_550_getc(void)
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void udbg_init_uart(void __iomem *comport, unsigned int speed,
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unsigned int clock)
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{
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unsigned int dll, base_bauds = clock / 16;
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unsigned int dll, base_bauds;
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if (clock == 0)
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clock = 1843200;
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if (speed == 0)
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speed = 9600;
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base_bauds = clock / 16;
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dll = base_bauds / speed;
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if (comport) {
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