[microblaze-uclinux] CLOCK FREQ and TIMER configuration

[alucero@xxxxxxxxx]

I have problems with the timer configuration at 
arch/microblaze/kernel/microblaze_timer.c

The value for CONFIG_XILINX_CPU_CLOCK_FREQ is 100000000, although the use of 
DCM in the FPGA design changes the clock signal to 75000000. If the systems 
boots with the original value, the timer goes faster than expected: a minute 
is not 60 seconds but 80s. As I know the 100 should be 75, so I have changed 
it, and instead of the behaviour expected the timer is now running two times 
faster than expected.

After studying the code and the timer documentation, the configuration seems 
to be ok for me. So I don't know what is happening.

However, if I set the CONFIG_XILINX_CPU_CLOCK_FREQ to 150000000 the timer 
works fine.

Can any one show me the light?

Thanks.

-- 
Alejandro Lucero
OS3, OS Serveis i Solucions
www.os3sl.com
Ingeniería Informática
+34 665687168
Av.Benjamin Franklin
CEEI. Parque Tecnológico de Paterna
Valencia(Spain)

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