Re: [PATCH v4 1/2] ARM: keystone: pm: switch to use generic pm domains

santosh.shilimkar
2014-11-18T02:18:24Z

On 11/17/14 12:37 PM, Arnd Bergmann wrote:
> On Monday 17 November 2014 11:14:16 Kevin Hilman wrote:
>>>>
>>>> So, The Keystone 2 Generic PM Controller is just a proxy PM layer here between
>>>> device and Generic clock manipulation PM callbacks.
>>>> It fills per-device clock list when device is attached to GPD and
>>>> ensures that all clocks from that list enabled/disabled when device is
>>>> started/stopped.
>>>
>>> The idea of such a generic power domain implementation sounds useful, but
>>> it has absolutely no business in platform specific code.
>>
>> Yes it does. This isn't a generic power domain implementation, but
>> rather just the platform-specific glue that hooks up the clocks to the
>> right devices and power-domains so that the generic power-domain and
>> generic pm_clocks code does the right thing.
>
> How would you do this on an arm64 version of keystone then? With
> the current approach, you'd need to add a machine specific directory,
> and that seems completely pointless since this is not even about
> a hardware requirement.
>
The Keystone PM domain code actually doesn't have to be under machine
code. Infact my first patch I added that under drivers/bus/ and later
based on Kevin's suggestion moved under machine. That time the Keystone
64 bit arch point I couldn't bring up for other reasons.

But the code itself can be easily moved to drivers/power/ without
any issue if thats what is the concern here.

Regards,
Santosh