linux-kernel - Re: [PATCH 1/1] ARM: dts: Use more descriptive names for Exynos5420 PDs

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Message-ID: <54D9F7B1.3030106@cogentembedded.com>
Date:	Tue, 10 Feb 2015 15:21:05 +0300
From:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
To:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
CC:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Kukjin Kim <kgene@...nel.org>,
	Andrzej Hajda <a.hajda@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Marek Szyprowski <m.szyprowski@...sung.com>
Subject: Re: [PATCH 1/1] ARM: dts: Use more descriptive names for Exynos5420
 PDs

On 2/10/2015 3:17 PM, Krzysztof Kozlowski wrote:

>>> Additionally (on Arndale Octa):

>>> $ cat /sys/kernel/debug/pm_genpd/pm_genpd_summary
>>>       domain                      status         slaves
>>>              /device                                      runtime status
>>> ----------------------------------------------------------------------
>>> power-domain                    on
>>>       /devices/platform/amba/3880000.adma                 suspended
>>> power-domain                    off
>>> power-domain                    off
>>> power-domain                    off
>>> power-domain                    off
>>> power-domain                    off

>>> This really is not helpful. From the power domain debugfs code it is
>>> complicated to extract of_node of power domain.

>>      You shouldn't need it.

>>> It is easier to print
>>> the name of power domain. But wait... all names are the same! :) So
>>> why do we have the name in the first place?

>>      I'm not sure why the full platform device names aren't printed -- they
>> should all be different.

> This debugfs code iterates over list of generic_pm_domains (gpd_list). I
> cannot find function for translating from genpd to its platform device
> so only genpd->name can be printed.

    Then why power domains aren't just named with the platform device names?

> Best regards,
> Krzysztof

WBR, Sergei

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