> > Asking linux-pm for help here: If we want to support RuntimePM for I2C
> > clients, do we need to enable RuntimePM on the logical I2C adapter
> > device (the bus master) which is already marked using
> > pm_runtime_no_callbacks?
> In theory you don't need to.  But there are some advantages if you do: 
> You get automatic runtime PM time accounting for the adapter device 
> (how much time active and how much suspended), and suspend events will 
> propagate from the I2C clients all the way up to the adapter's parent.

That's exactly what I want. Thank you very much!

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