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authorDavid Woodhouse <dwmw2@infradead.org>2005-11-24 17:08:56 +0000
committerPaul Mackerras <paulus@samba.org>2006-01-09 14:50:42 +1100
commit31df1678d7732b94178a6e457ed6666e4431212f (patch)
treee464f609dd5fa95a28da60127c79db24bd44152e /arch/powerpc/kernel/legacy_serial.c
parent9177ae4378add0126104e2966aa6150258610d59 (diff)
[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>
Diffstat (limited to 'arch/powerpc/kernel/legacy_serial.c')
-rw-r--r--arch/powerpc/kernel/legacy_serial.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 28ad50e424a9..7a685cae81ed 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -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);