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

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Date:	Tue, 10 Feb 2015 13:30:38 +0100
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.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 wto, 2015-02-10 at 15:21 +0300, Sergei Shtylyov wrote:
> 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?

Right, the mach-exynos/pm_domains.c set the name equal to OF node name.
I'll send a patch extending the name.

Best regards,
Krzysztof


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