[linux-cirrus] Re: Setting HClk to lower speed

On Thu, 2007-02-08 at 13:51 -0500, Chase Douglas wrote:
> Hi all,
> 
> I'm using redboot to boot linux on my edb9302a board. For my current  
> project, I need to clock the memory at only 50 MHz instead of 100  
> MHz. I assume that this is set in the redboot code, but I can't find  
> where. The only place I see redboot set the CLKSET1 register is in  
> HAL_PLATFORM_RESET():
> 
> HAL_WRITE_UINT32(EP9312_CLKSET1, 0x000398e7);
> 
> However, when I place a printk in ep93xx_clock_init, I see that  
> CLKSET1 is set to 0x02a4e39e. Does anyone know how this gets set?
> 

Hi Chase -

Did you check plf_hardware_init,
in /sources/ecos_new/packages/hal/arm/arm9/ep93xx/v2_0/src/ep93xx_misc.c?

You might also find Jim Jackson's cctl utility helpful:
http://www.comp.leeds.ac.uk/jj/linux/cctl.tgz

Regards, ..... Charlie

> Thanks,
> Chase

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