[PATCH V2] PM / Domains: Add pm_genpd_lookup() API to lookup domain by firmware node

amit daniel kachhap amit.daniel at samsung.com
Mon Dec 1 03:57:39 PST 2014

On Mon, Dec 1, 2014 at 3:56 PM, Ulf Hansson <ulf.hansson at linaro.org> wrote:
> On 29 November 2014 at 01:30, Rafael J. Wysocki <rjw at rjwysocki.net> wrote:
>> On Friday, November 28, 2014 11:38:35 AM Ulf Hansson wrote:
>>> In a step to move away from using genpd's name based APIs, such as the
>>> pm_genpd_add_subdomain_names(), provide an API to lookup an already
>>> initialized generic PM domain by its firmware node.
>>> This API would typically be a called from SOC specific code, to fetch a
>>> handle to the domain. Especially convenient to configure subdomains and
>>> when the hierarchy of the domains are described in DT.
>>> Do note, before pm_genpd_init() is invoked to initialize a generic PM
>>> domain, it's the callers responsibility to assign the new ->fwnode
>>> pointer in the struct generic_pm_domain, to enable pm_genpd_lookup() to
>>> find the domain.
>>> Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
>> I have no problems with that, but do you have a user for it?
> Amit Daniel Kachhap, posted a patchset which is adding subdomains
> configured from DT for Exynos. It's from there the idea to this patch
> comes from. Amit is about to post a new version, based on this patch.

Hi Ulf,

I was trying to use this API but i felt there is a better way of just exporting
of_genpd_get_from_provider as a similar API is used to register the
power domain.

Check if this make sense www.spinics.net/lists/arm-kernel/msg382665.html.


> https://lkml.org/lkml/2014/11/24/290
> Kind regards
> Uffe
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