From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@samba.org>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: [PATCH] powerpc: Fix default clock for udbg_16550
Date: Tue, 04 Jul 2006 14:11:23 +1000 [thread overview]
Message-ID: <1151986283.13828.38.camel@localhost.localdomain> (raw)
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>
Index: linux-irq-work/arch/powerpc/kernel/udbg_16550.c
===================================================================
--- linux-irq-work.orig/arch/powerpc/kernel/udbg_16550.c 2006-07-04 13:01:13.000000000 +1000
+++ linux-irq-work/arch/powerpc/kernel/udbg_16550.c 2006-07-04 13:05:59.000000000 +1000
@@ -81,10 +81,14 @@
void udbg_init_uart(void __iomem *comport, unsigned int speed,
unsigned int clock)
{
- unsigned int dll, base_bauds = clock / 16;
+ unsigned int dll, base_bauds;
+ if (clock == 0)
+ clock = 1843200;
if (speed == 0)
speed = 9600;
+
+ base_bauds = clock / 16;
dll = base_bauds / speed;
if (comport) {
reply other threads:[~2006-07-04 4:11 UTC|newest]
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