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SubjectRe: [PATCH 6/6][RFC] PM / Domains: Support for multiple generic power domain states
Hi Rafael,

"Rafael J. Wysocki" <> writes:

> From: Rafael J. Wysocki <>
> Allow the generic power domains support code to handle power
> domains with multiple states.


Before I even had the time to respond to you about my previous request
for this kind of feature, you've already implmented it. :)

> Replace the .power_down_ok()
> callback in struct dev_power_governor with a new callback
> .choose_state() that will return the number of the state to put the
> power domain into. Add new fields nr_states and current_state to
> struct generic_power_domain with the assumption that state 0 will be
> the full power state and states 1 through (nr_states - 1) will be low
> power.
> Replace power domain callbacks .power_off() and .power_on()
> with a single .set_state() callback taking the number of the state
> to put the power domain into as its second argument. Add a new
> generic power domain callback .power_off_state() (taking a state
> number as its second argument) allowing the core to check if
> device runtime PM callbacks need to be executed before putting the
> given power domain into the given state. Modify the core power
> domains code and the ARM shmobile platform code to take all of the
> above changes into account.
> Signed-off-by: Rafael J. Wysocki <>

Reviewed-by: Kevin Hilman <>

This looks like a better starting point for more complicated hardware.



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