AM3352: BogoMIPS question

Hi SIr

I cannot find the keyword "BogoMIPS " in the link you offered.
please explain in more detailed

thanks
BR

To view current OPP (frequency in kHz):

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

Hi Sir

thanks for your reply.

We found the value is 720MHz. after doing below command
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq

BTW, there is one question as below.

we used AM3352BZCZ30 to do this test and found the BogoMIPS is about 720.

Does it have any side effect for system or any risk.

please advise

BR
Yimin.

This is not normal. I will ask the software team to comment. They will respond here.

Hi YImin,

Which version of silicon are you using?  If you're using PG2.1 of the silicon, we should be detecting the maximum supported frequency of the chip automatically.  However for earlier versions of the device, you will need to modify the opp-table in am33xx.dtsi to suit your device.

Can you please read the values from these registers and report the values:

device_id (address 0x44e10600)
EFUSE_SMA (address 0x44e107fc)

Also it would be helpful to see the output from the following command:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

Regards,
Mike

Hi Sir

1. PG2.1 , 300MHz

2. the value is listed as below

           device_id (address 0x44e10600) = 0x2b94402e

           EFUSE_SMA (address 0x44e107fc) = 0x00013fef

YImin,

Thank you for that information.  It looks like the kernel *should* be limiting max CPU frequency to 300MHz, based on what you've shared.

Please share the output from the following command:

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies

This will determine if the ti-cpufreq driver is properly limiting the available frequencies in the opp-table defined in the device tree.

Regards,
Mike