Forum Post: RE: Changing from AM335 720MHz to 1GHz

Just a quick update.  Running the Gel file before booting fixes it because it sets the MPU PLL to a lower speed : /.

So this allows the board to boot up fine:

MPU_PLL_Config( CLKIN, 23, 800, 1);
CORE_PLL_Config( CLKIN, 23, 1000, 10, 8, 4);
DDR_PLL_Config( CLKIN, 23, 400, 1);
PER_PLL_Config( CLKIN, 23, 960, 5);
DISP_PLL_Config( CLKIN, 23, 48, 1);

And this fails:

MPU_PLL_Config( CLKIN, 23, 1000, 1);
CORE_PLL_Config( CLKIN, 23, 1000, 10, 8, 4);
DDR_PLL_Config( CLKIN, 23, 400, 1);
PER_PLL_Config( CLKIN, 23, 960, 5);
DISP_PLL_Config( CLKIN, 23, 48, 1);

So it is directly tied with the 1GHz speed in the kernel.  If i start up at 800MHz and then try to change to 1GHz via:

echo 1000000 > /sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed

Then everything locks up.  Is there something i could be doing somewhere in the kernel config or board init file that is changing things?

I am going to keep playing around to see if i can figure it out.  I guess i would have to have messed something up in the kernel setup, not sure what though : /.