Mity CPU Platforms » MityDSP-L138 (ARM9 Based Platforms)

03/27/2023

02:12 PM Software Development: RE: Increasing CPU clock OMAPL138

Alright.
Is there is no way to change the default frequency from 300Mhz to e.g. 372MHz with U-Boot?
As far as I ... Kim Nielsen

02:01 PM Software Development: RE: Increasing CPU clock OMAPL138

Hi Kim,
I think the issue is that the voltage scaling needs to be done to default
to a higher frequency.
The P... Michael Williamson

02:00 PM Software Development: RE: Increasing CPU clock OMAPL138

I don't see an obvious default frequency config in the kernel, I'd guess that it stays with whatever frequency was se... Jonathan Cormier

01:44 PM Software Development: RE: Increasing CPU clock OMAPL138

I actually got another question.
By default, the cpu frequency seems to always be 300 MHz.
Is this value hardco... Kim Nielsen

03/24/2023

05:24 PM Software Development: RE: Increasing CPU clock OMAPL138

Kim Nielsen wrote in message#6283:
> It's our own "experimental" kernel.
> It seems to be working now. The issue wa... Jonathan Cormier

12:21 PM Software Development: RE: Increasing CPU clock OMAPL138

It's our own "experimental" kernel.
It seems to be working now. The issue was that the pll0 registers were apparentl... Kim Nielsen

03/23/2023

01:37 PM Software Development: RE: Increasing CPU clock OMAPL138

Where is the 4.19 kernel based from? It doesn't appear to have working cpufreq. Jonathan Cormier

07:17 AM Software Development: RE: Increasing CPU clock OMAPL138

Hi Mike & Jonathan,
Thank you for the fast reply :-)
I have the following frequencies available according to th... Kim Nielsen

03/22/2023

09:25 PM Software Development: RE: Increasing CPU clock OMAPL138

Hi Kim, What kernel version are you using? Testing this on our released 3.2 kernel appears to be working for me.
... Jonathan Cormier

05:23 PM Software Development: RE: Increasing CPU clock OMAPL138

Hi Kim,
What do you get when you dump out the scaling_available_frequencies (I don't remember the exact name off t... Michael Williamson

03:14 PM Software Development: Increasing CPU clock OMAPL138

Hi,
I'm using a "L138-FI-236-RL" SOM board with SYS/BIOS running on the DSP and Linux on the ARM.
The Linux is bu... Kim Nielsen