Re: [PATCH v1 0/3] Add required-opps support to devfreq passive gov

[Viresh Kumar]

On 21-06-19, 17:34, Saravana Kannan wrote:
> The devfreq passive governor scales the frequency of a "child" device
> based on the current frequency of a "parent" device (not parent/child in
> the sense of device hierarchy). As of today, the passive governor
> requires one of the following to work correctly:
> 1. The parent and child device have the same number of frequencies
> 2. The child device driver passes a mapping function to translate from
>    parent frequency to child frequency.
> 
> When (1) is not true, (2) is the only option right now. But often times,
> all that is required is a simple mapping from parent's frequency to
> child's frequency.
> 
> Since OPPs already support pointing to other "required-opps", add
> support for using that to map from parent device frequency to child
> device frequency. That way, every child device driver doesn't have to
> implement a separate mapping function anytime (1) isn't true.

Can you please provide a real world example with DT code here so I
can understand it better ?

-- 
viresh