From: David Woodhouse Date: Thu, 24 Nov 2005 17:08:56 +0000 (+0000) Subject: [PATCH] powerpc: serial port discovery: cope with broken firmware X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=31df1678d7732b94178a6e457ed6666e4431212f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git [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 Signed-off-by: Paul Mackerras --- 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);