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From: Jon Hunter <jonathanh@nvidia.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Kevin Hilman <khilman@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>
Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
	linux-pm@vger.kernel.org, Alexander Aring <alex.aring@gmail.com>,
	Eric Anholt <eric@anholt.net>,
	Thierry Reding <thierry.reding@gmail.com>,
	Kukjin Kim <kgene@kernel.org>,
	linux-tegra@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH 1/8] PM / Domains: Add new helper functions for device-tree
Date: Wed, 22 Jun 2016 15:58:58 +0100	[thread overview]
Message-ID: <576AA7B2.5030004@nvidia.com> (raw)
In-Reply-To: <1457090634-14785-2-git-send-email-jonathanh@nvidia.com>

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.

Cheers
Jon

-- 
nvpublic

WARNING: multiple messages have this Message-ID (diff)
From: jonathanh@nvidia.com (Jon Hunter)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC PATCH 1/8] PM / Domains: Add new helper functions for device-tree
Date: Wed, 22 Jun 2016 15:58:58 +0100	[thread overview]
Message-ID: <576AA7B2.5030004@nvidia.com> (raw)
In-Reply-To: <1457090634-14785-2-git-send-email-jonathanh@nvidia.com>

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.

Cheers
Jon

-- 
nvpublic

  parent reply	other threads:[~2016-06-22 14:58 UTC|newest]

Thread overview: 58+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-04 11:23 [RFC PATCH 0/8] PM / Domains: Add support for removing PM domains Jon Hunter
2016-03-04 11:23 ` Jon Hunter
2016-03-04 11:23 ` [RFC PATCH 3/8] staging: board: Remove calls to of_genpd_get_from_provider() Jon Hunter
2016-03-04 11:23   ` Jon Hunter
2016-03-04 11:23 ` [RFC PATCH 4/8] PM / Domains: Don't expose generic_pm_domain structure Jon Hunter
2016-03-04 11:23   ` Jon Hunter
2016-08-05 11:55   ` Ulf Hansson
2016-08-05 11:55     ` Ulf Hansson
     [not found] ` <1457090634-14785-1-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-03-04 11:23   ` [RFC PATCH 1/8] PM / Domains: Add new helper functions for device-tree Jon Hunter
2016-03-04 11:23     ` Jon Hunter
2016-06-22 11:00     ` Jon Hunter
2016-06-22 11:00       ` Jon Hunter
2016-06-22 14:58     ` Jon Hunter [this message]
2016-06-22 14:58       ` Jon Hunter
2016-06-22 15:08       ` Ulf Hansson
2016-06-22 15:08         ` Ulf Hansson
2016-06-22 15:22         ` Jon Hunter
2016-06-22 15:22           ` Jon Hunter
2016-06-22 15:36           ` Ulf Hansson
2016-06-22 15:36             ` Ulf Hansson
2016-03-04 11:23   ` [RFC PATCH 2/8] ARM: EXYNOS: Remove calls to of_genpd_get_from_provider() Jon Hunter
2016-03-04 11:23     ` Jon Hunter
2016-03-04 11:23   ` [RFC PATCH 5/8] PM / Domains: Verify the PM domain is present when adding a provider Jon Hunter
2016-03-04 11:23     ` Jon Hunter
2016-08-05 11:57     ` Ulf Hansson
2016-08-05 11:57       ` Ulf Hansson
2016-03-04 11:23   ` [RFC PATCH 7/8] PM / Domains: Prepare for adding support to remove PM domains Jon Hunter
2016-03-04 11:23     ` Jon Hunter
2016-03-04 12:33   ` [RFC PATCH 0/8] PM / Domains: Add support for removing " Ulf Hansson
2016-03-04 12:33     ` Ulf Hansson
     [not found]     ` <CAPDyKFq3hNARzjSOoP+-NmcgfSWzG6GDmh7qVX6yx6QPgN9Arw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-03-28 12:38       ` Jon Hunter
2016-03-28 12:38         ` Jon Hunter
     [not found]         ` <56F925D9.3080703-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-06-06 13:19           ` Jon Hunter
2016-06-06 13:19             ` Jon Hunter
2016-06-15 14:46   ` Ulf Hansson
2016-06-15 14:46     ` Ulf Hansson
2016-03-04 11:23 ` [RFC PATCH 6/8] PM / Domains: Remove a provider by referencing the data pointer Jon Hunter
2016-03-04 11:23   ` Jon Hunter
     [not found]   ` <1457090634-14785-7-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-06-15 14:38     ` Ulf Hansson
2016-06-15 14:38       ` Ulf Hansson
2016-06-21 13:47       ` Jon Hunter
2016-06-21 13:47         ` Jon Hunter
     [not found]         ` <5769455C.9010809-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-07-11 13:14           ` Jon Hunter
2016-07-11 13:14             ` Jon Hunter
2016-08-05 11:55           ` Ulf Hansson
2016-08-05 11:55             ` Ulf Hansson
     [not found]             ` <CAPDyKFovC07Z9y-4RQ4MKGtjJx5w1D8er3Fv-8HF2qyTKgVViQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2016-08-11 16:39               ` Jon Hunter
2016-08-11 16:39                 ` Jon Hunter
     [not found]                 ` <18ad702c-83fe-fd6d-89ae-57e6f2715860-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-08-12  0:24                   ` Rafael J. Wysocki
2016-08-12  0:24                     ` Rafael J. Wysocki
2016-06-21 14:45     ` Jon Hunter
2016-06-21 14:45       ` Jon Hunter
2016-03-04 11:23 ` [RFC PATCH 8/8] PM / Domains: Add support for removing PM domains Jon Hunter
2016-03-04 11:23   ` Jon Hunter
     [not found]   ` <1457090634-14785-9-git-send-email-jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-06-15 14:33     ` Ulf Hansson
2016-06-15 14:33       ` Ulf Hansson
2016-06-21 14:08       ` Jon Hunter
2016-06-21 14:08         ` Jon Hunter

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