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From: Tomasz Figa <t.figa-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
To: Kevin Hilman <khilman-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
	Tomasz Figa <tomasz.figa-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Cc: linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
	devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Greg Kroah-Hartman
	<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
	"Rafael J. Wysocki" <rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org>,
	Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>,
	Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Russell King <linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org>,
	Kukjin Kim <kgene.kim-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Kumar Gala <galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>,
	Ian Campbell
	<ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org>,
	Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>,
	Pawel Moll <pawel.moll-5wv7dgnIgG8@public.gmane.org>,
	Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
	Bartlomiej Zolnierkiewicz
	<b.zolnierkie-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>,
	Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
Subject: Re: [PATCH RFC 04/10] base: power: Add generic OF-based power domain look-up
Date: Mon, 20 Jan 2014 17:24:17 +0100	[thread overview]
Message-ID: <52DD4DB1.2050200@samsung.com> (raw)
In-Reply-To: <87r48a8t99.fsf-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

Hi Kevin,

On 14.01.2014 16:42, Kevin Hilman wrote:
> Tomasz Figa <tomasz.figa-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:
>
>> This patch introduces generic code to perform power domain look-up using
>> device tree and automatically bind devices to their power domains.
>> Generic device tree binding is introduced to specify power domains of
>> devices in their device tree nodes.
>>
>> Backwards compatibility with legacy Samsung-specific power domain
>> bindings is provided, but for now the new code is not compiled when
>> CONFIG_ARCH_EXYNOS is selected to avoid collision with legacy code. This
>> will change as soon as Exynos power domain code gets converted to use
>> the generic framework in further patch.
>>
>> Signed-off-by: Tomasz Figa <tomasz.figa-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
>
> I haven't read through this in detail yet, but wanted to make sure that
> the DT representation can handle nested power domains.  At least
> SH-mobile has a hierarchy of power domains and the genpd code can handle
> that, so wanted to make sure that the DT representation can handle it as
> well.

The representation of power domains themselves as implied by this patch 
is fully platform-specific. The only generic part is the 
#power-domain-cells property, which defines the number of cells needed 
to identify the power domain of given provider. You are free to have any 
platform-specific properties (or even generic ones, added on top of this 
patch) to let you specify the hierarchy in DT.

Best regards,
Tomasz
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  parent reply	other threads:[~2014-01-20 16:24 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-01-11 19:42 [PATCH RFC 00/10] Generic Device Tree based power domain look-up Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 01/10] ARM: s3c64xx: pm: Use name field of generic_pm_domain Tomasz Figa
2014-01-12 11:47   ` Pavel Machek
2014-01-12 12:16     ` Tomasz Figa
2014-01-12 18:53       ` Pavel Machek
2014-01-12 19:03         ` Tomasz Figa
2014-01-12 19:24           ` Mark Brown
2014-01-12 19:20   ` Mark Brown
2014-01-12 19:25     ` Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 02/10] ARM: s3c64xx: pm: Add always_on field to s3c64xx_pm_domain struct Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 03/10] ARM: s3c64xx: pm: Add pwr_stat bit for domain G Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 04/10] base: power: Add generic OF-based power domain look-up Tomasz Figa
2014-01-14 15:42   ` Kevin Hilman
     [not found]     ` <87r48a8t99.fsf-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2014-01-20 16:24       ` Tomasz Figa [this message]
2014-01-23  0:32         ` Stephen Boyd
2014-01-16 16:34   ` Lorenzo Pieralisi
2014-01-20 17:32     ` Tomasz Figa
2014-01-22 11:00       ` Lorenzo Pieralisi
2014-01-23  0:18   ` Stephen Boyd
     [not found]     ` <20140123001802.GF13785-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2014-01-23  0:31       ` Tomasz Figa
2014-02-24 12:11         ` Ulf Hansson
2014-02-19 16:53   ` Philipp Zabel
2014-02-23 17:07     ` Tomasz Figa
2014-02-24 10:56       ` Philipp Zabel
2014-01-11 19:42 ` [PATCH RFC 05/10] ARM: exynos: Move to generic power domain bindings Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 06/10] ARM: s3c64xx: pm: Add device tree based power domain instantiation Tomasz Figa
2014-01-12 19:29   ` Mark Brown
     [not found]     ` <20140112192910.GW29039-GFdadSzt00ze9xe1eoZjHA@public.gmane.org>
2014-01-12 19:34       ` Tomasz Figa
2014-01-13 11:09         ` Mark Brown
2014-01-13 12:13           ` Tomasz Figa
2014-01-13 12:17             ` Mark Brown
2014-01-11 19:42 ` [PATCH RFC 07/10] ARM: s3c64xx: dt: Enable SoC-level power management Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 08/10] ARM: dts: s3c64xx: Add nodes for power domains Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 09/10] ARM: dts: s3c64xx: Add node for display controller Tomasz Figa
2014-01-11 19:42 ` [PATCH RFC 10/10] ARM: dts: s3c6410-mini6410: Add support for LCD screen Tomasz Figa
2014-01-11 19:52 ` [PATCH RFC 00/10] Generic Device Tree based power domain look-up Tomasz Figa

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