TDA4VM: How to change the cpu frequence ?

Veitch Kyrie

Part Number: TDA4VM

Hi TI,

Currently we found the default cpu highest frequency of A72 is 2GHz, which is too higher for us since we want to reduce power consumption, but I can't find where to configure it? could you please show me? thanks

over 3 years ago

0 Karan Saxena over 3 years ago

TI__Guru* 76754 points

Hi,

Can you please take a look at this FAQ - https://e2e.ti.com/support/processors-group/processors/f/processors-forum/997678/faq-dra821u-how-to-change-the-frequency-of-a72-and-r5f-cores-and-disable-one-a72-core and see if this answers the question.

Regards

Karan

+1 Keerthy J over 3 years ago in reply to Karan Saxena

TI__Guru**** 150970 points

Hi Veitch,

You can also reduce the clock of A72 dynamically using the k3conf tool.

The following 2 steps:

1) /*set PLL8_SS_CTRL Register bit[0]. */
devmem2 0x688040 w 0x80000001

2) /* Set the clock to 1GHz */
k3conf set clock 202 2 1000000000

If no other questions please click on verify answer.

Best Regards,
Keerthy

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TDA4VM: How to change the cpu frequence ?