linux-kernel - Re: [PATCH 1/6] Haptic: add haptic class

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Message-ID: <5d5443650910130413t6ecd3d54p214d8f80972ed128@mail.gmail.com>
Date:	Tue, 13 Oct 2009 16:43:43 +0530
From:	Trilok Soni <soni.trilok@...il.com>
To:	Jani Nikula <ext-jani.1.nikula@...ia.com>
Cc:	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
	Dmitry Torokhov <dmitry.torokhov@...il.com>
Subject: Re: [PATCH 1/6] Haptic: add haptic class

Hi Kyungmin, Dmitry,

On Tue, Oct 13, 2009 at 4:05 PM, Jani Nikula
<ext-jani.1.nikula@...ia.com> wrote:
> On Wed, Oct 7, 2009 at 09:17, Kyungmin Park <kyungmin.park@...sung.com> wrote:
>> New haptic class support.
>> This class handles the haptic devices.
>
> I'm wondering why a haptic class is needed when there is force
> feedback support. Admittedly, I don't know the force feedback
> implementation too well, but could someone please enlighten me on
> this? Am I missing something here?
>
> I see haptics as simple force feedback, just with (usually) small
> force and short duration. There are devices out there doing haptics
> using vibra motors, which I think would be limited if implemented
> using this haptics class driver. Would it be somehow problematic
> interfacing with the simple haptic hardware using the force feedback
> API?

Please share your inputs on ff_device usage instead of haptics class.
I think Dmitry could add some points here as I don't see much users of
ff_device and I don't see any embedded device (like mobile) using it.

-- 
---Trilok Soni
http://triloksoni.wordpress.com
http://www.linkedin.com/in/triloksoni
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