linux-kernel - Re: [PATCHv5 2/2] INPUT: Introduce generic trigger/LED pairs to input LEDs

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Message-ID: <20150123004429.GD3123@type.youpi.perso.aquilenet.fr>
Date:	Fri, 23 Jan 2015 01:44:29 +0100
From:	Samuel Thibault <samuel.thibault@...-lyon.org>
To:	Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:	Pavel Machek <pavel@....cz>,
	David Herrmann <dh.herrmann@...il.com>,
	akpm@...ux-foundation.org, jslaby@...e.cz,
	Bryan Wu <cooloney@...il.com>, rpurdie@...ys.net,
	linux-kernel@...r.kernel.org, Evan Broder <evan@...oder.net>,
	Arnaud Patard <arnaud.patard@...-net.org>,
	Peter Korsgaard <jacmet@...site.dk>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Rob Clark <robdclark@...il.com>,
	Niels de Vos <devos@...oraproject.org>,
	linux-arm-kernel@...ts.infradead.org, blogic@...nwrt.org,
	Pali Rohár <pali.rohar@...il.com>
Subject: Re: [PATCHv5 2/2] INPUT: Introduce generic trigger/LED pairs to
 input LEDs

Dmitry Torokhov, le Thu 22 Jan 2015 16:37:02 -0800, a écrit :
> On Friday, January 23, 2015 01:30:11 AM Samuel Thibault wrote:
> > Samuel Thibault, le Fri 23 Jan 2015 01:10:38 +0100, a écrit :
> > > Dmitry Torokhov, le Sun 04 Jan 2015 15:28:38 -0800, a écrit :
> > > > > +	dev = cdev->dev->platform_data;
> > > > 
> > > > Umm, platform data is not the best place for storing this. Why not
> > > > drvdata?
> > > 
> > > Ah, actually led_classdev already makes use of it, see the
> > > device_create_with_groups call in led_classdev_register.
> > 
> > Actually I'd say it makes sense to be using the platform_data field:
> > from the point of view of the led object, the input object is indeed
> > something like a platform.
> 
> No, platform data is what difefrentiates an arm board from another arm board, 
> or an x86 or mips one.

>From the point of view of a device connected to that board, yes. But
from the point of view of LEDs connected to a keyboard, the platform is
the keyboard.

Samuel
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