[U-Boot-Users] [RFC PATCH] icecube/lite5200b: fix OF_TBCLK (timebase-frequency) calculation

Domen Puncer domen.puncer at telargo.com
Wed Mar 7 08:02:58 CET 2007

(sorry if you receive this twice, MTA issues)

I tracked jiffies (on Linux) incrementing twice as fast on
lite5200b to this ("timebase-frequency" property).

G2 core reference manual says decrementer and time base
are decreasing/increasing once every 4 bus clock cycles.

Was there a reason this was busfreq/8?

 include/configs/IceCube.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: u-boot.git/include/configs/IceCube.h
--- u-boot.git.orig/include/configs/IceCube.h
+++ u-boot.git/include/configs/IceCube.h
@@ -182,7 +182,7 @@
 #define OF_CPU			"PowerPC,5200 at 0"
 #define OF_SOC			"soc5200 at f0000000"
-#define OF_TBCLK		(bd->bi_busfreq / 8)
+#define OF_TBCLK		(bd->bi_busfreq / 4)
 #define OF_STDOUT_PATH		"/soc5200 at f0000000/serial at 2000"

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