linux-kernel - [RFC][Update 2][PATCH 0/4] ACPI / PM: Export power information to user space

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Message-ID: <4247313.2G7Z3nCgM0@vostro.rjw.lan>
Date:	Mon, 21 Jan 2013 14:03:03 +0100
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Kristen C. Accardi" <kristen.c.accardi@...el.com>,
	Len Brown <lenb@...nel.org>
Subject: [RFC][Update 2][PATCH 0/4] ACPI / PM: Export power information to user space

On Monday, January 21, 2013 01:48:55 AM Rafael J. Wysocki wrote:
> On Sunday, January 20, 2013 03:51:40 PM Rafael J. Wysocki wrote:
> > Hi Greg,
> > 
> > The following patch series is about exporting ACPI power resources to user
> > space that will be necessary for PM diagnostics on new platforms (powertop is
> > the target).  Still, existing systems can also benefit from that, like my
> > oldish HP nx6325 on which the patches have been tested.
> > 
> > Patch [1/3] shouldn't be really controverisal, as it only makes it possible
> > to read power resources' reference counters from user space in a quite
> > straightforward way.
> > 
> > Patch [3/3], however, exposes lists of power resources associated with
> > different power states of devices using ACPI PM as sysfs subdirectories
> > containing symbolic links and that requires some sysfs changes made by
> > patch [2/3].
> > 
> > Admittedly, my sysfs skills are limited so please let me know if those
> > changes make sense and are acceptable from your perspective.  If not, then
> > please kindly advise what I can do instead of them.
> > 
> > The patches apply on top of the current linux-next branch of the linux-pm.git
> > tree.
> 
> Refreshed with Documentation/ABI files as requested.

Well, that version wasn't really a good one, due to mistakes in the docs
mostly, so a new one follows (with better docs hopefully).

Besides, I thought I'd include a patch that exposes ACPI power state
information, because it kind of belongs to the lot.  It goes as the new [1/4].

[2/4] is the previous [1/3] and so on.

Thanks,
Rafael


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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