[RFC PATCH 1/8] PM / Domains: Add new helper functions for device-tree

[Ulf Hansson]

On 22 June 2016 at 16:58, Jon Hunter <jonathanh at nvidia.com> wrote:
> Hi Ulf,
>
> On 04/03/16 11:23, Jon Hunter wrote:
>> Ideally, if we are returning a reference to a PM domain via a call to
>> of_genpd_get_from_provider(), then we should keep track of such
>> references via a reference count. The reference count could then be used
>> to determine if a PM domain can be safely removed. Alternatively, it is
>> possible to avoid such external references by providing APIs to access
>> the PM domain and hence, eliminate any calls to
>> of_genpd_get_from_provider().
>>
>> Add new helper functions for adding a device and a subdomain to a PM
>> domain when using device-tree, so that external calls to
>> of_genpd_get_from_provider() can be removed.
>
> While we are at it, does it make sense to add helpers for
> of_genpd_remove_device/subdomain() as well? Seems that these could be
> useful for doing the inverse when cleaning up.

I would prefer if we could avoid adding new APIs until we really see
the need for it.

Moreover, I would like to avoid us adding OF specific APIs, unless
those can be really justified.
Hope that made sense.

Kind regards
Uffe