How to change the cpu working frequency of uclinux?

<div class='quotetop'>QUOTE (mschnell @ Aug 14 2009, 03:05 AM) <{post_snapback}> (index.php?act=findpost&pid=23508)</div>

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Do you want to dynamically change the CPU frequency ?

That is an interesting issue. (Especially for implementing a power saving mode.)

I don&#39;t suppose this is provided by the NIOS SOPC module. But I suppose the clock for the CPU can be taken from any source within the FPGA and thus you should be able to implement some hardware for a variable clock source module using HDL code (e.g. changing the divide factor of a PLL) . Same could be an Avalon bus slave.

Now you would need to do a kernel driver that writes to the clock hardware and as Linux does have a Power management subsystem, if done correctly same could access your Kernel driver to do the standard (e.g. Laptop-like) clock frequency handling for power saving

On the long run I do plan for something like this, too.

-Michael[/b]

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I believe it&#39;s a very interesting process to change the frequency,too. I will gather more knowledge in the following semester, and enjoy the next amazing semester in my life.