[QUESTION] How to enable runtime PM

[QUESTION] How to enable runtime PM

[Ming Lei]

Hi Kevin,

I am interested in runtime pm implementation on OMAP3, and
want to test this function on omap3-based beagle board, but seems
no devices on omap3 Soc can support runtime pm(no __pm_runtime_*
message found from 'dmesg' and rpm debug option is surely enabled)
now after trying the two omap trees below:

     git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git#pm-core
     git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git#pm

So, could you give me some guideline about how to bring up runtime pm
on beagle? such as,

               which git tree and branch should be used?
               which option should be enabled?
               or other things.

thanks,

-- 
Lei Ming

Re: [QUESTION] How to enable runtime PM

[Kevin Hilman]

Ming Lei <tom.leiming@gmail.com> writes:

> Hi Kevin,
>
> I am interested in runtime pm implementation on OMAP3, and
> want to test this function on omap3-based beagle board, but seems
> no devices on omap3 Soc can support runtime pm(no __pm_runtime_*
> message found from 'dmesg' and rpm debug option is surely enabled)
> now after trying the two omap trees below:
>
>      git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm.git#pm-core
>      git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6.git#pm
>
> So, could you give me some guideline about how to bring up runtime pm
> on beagle? such as,
>
>                which git tree and branch should be used?
>                which option should be enabled?
>                or other things.

Hello,

Thanks for the interest in willing to experiment with runtime PM on
OMAP.

You're observations are correct.  The runtime PM core is ready, but none
of the devices have yet been adapted to the runtime PM API.  We will be
converting devices over to runtime PM over the next few merge windows,
with possibly some coming as soon as 2.6.37 (watchdog, UART, GPIO, i2c)

Kevin