linux-kernel - Re: [PATCH v2 3/3] PM / DEVFREQ: add sysfs interface (including user tickling)

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Message-Id: <201105180041.57723.rjw@sisk.pl>
Date:	Wed, 18 May 2011 00:41:57 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	myungjoo.ham@...il.com
Cc:	Greg KH <gregkh@...e.de>, linux-pm@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, Mark Brown <broonie@...ena.org.uk>,
	Jiejing Zhang <kzjeef@...il.com>, Pavel Machek <pavel@....cz>,
	Colin Cross <ccross@...gle.com>, Nishanth Menon <nm@...com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Len Brown <len.brown@...el.com>,
	Kyungmin Park <kyungmin.park@...sung.com>
Subject: Re: [PATCH v2 3/3] PM / DEVFREQ: add sysfs interface (including user tickling)

On Tuesday, May 17, 2011, MyungJoo Ham wrote:
> On Thu, May 12, 2011 at 7:55 AM, Greg KH <gregkh@...e.de> wrote:
> > On Wed, May 11, 2011 at 04:58:43PM +0900, MyungJoo Ham wrote:
> >> 1. System-wide sysfs interface
> >> - tickle_all  R: number of tickle_all execution
> >>               W: tickle all devfreq devices
> >> - min_interval        R: devfreq monitoring base interval in ms
> >> - monitoring  R: shows whether devfreq monitoring is active or
> >>   not.
> >>
> >> 2. Device specific sysfs interface
> >> - tickle      R: number of tickle execution for the device
> >>               W: tickle the device
> >
> > Any sysfs file change/addition/removal needs to have a
> > Documentation/ABI/ entry as well.  Please add that to this patch instead
> > of burying it in the changelog entry, where no one will be able to find
> > it in the future.
> >
> > thanks,
> >
> > greg k-h
> >
> 
> Sure, I'll add Documentation/ABI/testing/* entries.
> 
> However, would it be appropriate for "1. System-wide sysfs interface"
> to be in "sysfs-class-power" and for "2. Device specific sysfs
> interface" to be in "sysfs-devices-devfreq"?
> 
> System-wide sysfs interface is in /sys/class/power/devfreq/* and

Hmm.  Why not to use /sys/power/ that's already there?

> Device specific sysfs interface is in /sys/...DEVICE.../devfreq/* .

Thanks,
Rafael
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