Re: omap voltage management

[Nishanth Menon <nm@ti.com>]

On 04/06/2015 06:42 AM, Ryan wrote:
> On Wed, Apr 1, 2015 at 7:17 PM, Nishanth Menon <nm@ti.com> wrote:
>> On 04/01/2015 08:18 AM, Ryan wrote:
>>> Hi,
>>>
>>> I would like to ask a related question here
>> Please try not to top post :).
>>
>>>
>>> If i use performance governor alone - constantly running at the
>>> highest frequency. Does the smart reflex still has a role to play?
>> Yes. cpufreq governor are just policies - cpufreq policies just
>> selects a frequency to run the CPU from a list of frequencies. for
>> each frequency to be achieved, there is ABB, AVS configuration needed
>> (strategy specific to SoC).
>
> I was trying to find out where exactly the voltages for core and IVA
> are set in the code.

The generic layer for dvfs is yet to be implemented in k.org.

> Are they set whenever for every frequency change? - I see that the

yes.

> table is divided into OPP50, OPP100 and
> so on but was not able to trace the entire path.
>
> Also, does smartreflex framework uses the same path to change the
> voltages (omap446x_vdd_core_volt_data,
> omap446x_vdd_core_volt_data)

4460 on Panda-es does not have an implementation yet.
--
Regards,
Nishanth Menon