linux-kernel - Re: [PATCH 2/5] backlight: lp855x: document sysfs attributes

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Message-ID: <20180201154656.GB22817@mordor.localdomain>
Date:   Thu, 1 Feb 2018 21:16:56 +0530
From:   Aishwarya Pant <aishpant@...il.com>
To:     Daniel Thompson <daniel.thompson@...aro.org>
Cc:     Lee Jones <lee.jones@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Jonathan Corbet <corbet@....net>,
        Greg KH <gregkh@...uxfoundation.org>,
        Milo Kim <milo.kim@...com>, Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH 2/5] backlight: lp855x: document sysfs attributes

On Thu, Feb 01, 2018 at 11:06:42AM +0000, Daniel Thompson wrote:
> On Fri, Jan 26, 2018 at 08:23:00PM +0530, Aishwarya Pant wrote:
> > Add documentation for sysfs interface of Texas Instruments lp855x
> > backlight driver by reading code and looking through git commit logs.
> > 
> > Signed-off-by: Aishwarya Pant <aishpant@...il.com>
> > ---
> >  .../ABI/testing/sysfs-class-backlight-lp855x          | 19 +++++++++++++++++++
> >  1 file changed, 19 insertions(+)
> >  create mode 100644 Documentation/ABI/testing/sysfs-class-backlight-lp855x
> > 
> > diff --git a/Documentation/ABI/testing/sysfs-class-backlight-lp855x b/Documentation/ABI/testing/sysfs-class-backlight-lp855x
> > new file mode 100644
> > index 000000000000..5b9d38958875
> > --- /dev/null
> > +++ b/Documentation/ABI/testing/sysfs-class-backlight-lp855x
> > @@ -0,0 +1,19 @@
> > +sysfs interface for Texas Instruments lp855x backlight driver
> > +------------------------------------------------------------
> > +
> > +What:		/sys/class/backlight/<backlight>/chip_id
> > +Date:		Mar, 2012
> > +KernelVersion:	v3.10
> > +Contact:	Milo Kim <milo.kim@...com>
> > +Description:
> > +		(RO) Displays the lp8755x chip id. Possible values are:
> > +		lp8550, lp8551, lp8552, lp8553, lp8555, lp8556 or lp8557.
> > +
> > +
> > +What:		/sys/class/backlight/<backlight>/bl_ctl_mode
> > +Date:		Mar, 2012
> > +KernelVersion:	v3.10
> > +Contact:	Linux kernel mailing list <linux-kernel@...r.kernel.org>
> > +Description:
> > +		(RO) Displays whether the brightness is controlled by the pwm
> > +		input("pwm based) or the i2c register("register based").
> 
> Since like the first patch in the series, these look like they are for
> debugging. That thread is still active but whatever the outcome of that
> thread please assume it also applies to this patch.

All right, I'll wait for conclusion on that thread before I re-send the patchset
with the updates.

Aishwarya

> 
> 
> Daniel.