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[PATCH] powerpc: serial port discovery: cope with broken firmware 

On Tue, 2005-11-22 at 15:49 +1100, Benjamin Herrenschmidt wrote:
> This moves the discovery of legacy serial ports to a separate file,
> makes it common to ppc32 and ppc64, and reworks it to use the new OF
> address translators to get to the ports early. This new version can also
> detect some PCI serial cards using legacy chips and will probably match
> those discovered port with the default console choice.

This makes it deal with the fact that the Pegasos firmware reports that
its clock frequency is zero...

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
hifive-unleashed-5.1
David Woodhouse 2005-11-24 17:08:56 +00:00 committed by Paul Mackerras
parent 9177ae4378
commit 31df1678d7
1 changed files with 4 additions and 1 deletions
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5
arch/powerpc/kernel/legacy_serial.c
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@ -43,7 +43,10 @@ static int __init add_legacy_port(struct device_node *np, int want_index,
/* get clock freq. if present */
clk = (u32 *)get_property(np, "clock-frequency", NULL);
clock = clk ? *clk : BASE_BAUD * 16;
if (clk && *clk)
clock = *clk;
else
clock = BASE_BAUD * 16;
/* get default speed if present */
spd = (u32 *)get_property(np, "current-speed", NULL);