linux-kernel - Re: [PATCH 5/6] haptic: Samsung SoCs PWM controlled haptic support

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Message-ID: <9c9fda240910081651n7c30bcd1y931ee1d58198e2c3@mail.gmail.com>
Date:	Fri, 9 Oct 2009 08:51:56 +0900
From:	Kyungmin Park <kmpark@...radead.org>
To:	Bill Gatliff <bgat@...lgatliff.com>
Cc:	Trilok Soni <soni.trilok@...il.com>, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, ben-linux@...ff.org
Subject: Re: [PATCH 5/6] haptic: Samsung SoCs PWM controlled haptic support

Hi,

I agree use the generic PWM framework. But it's not support on Samsung SoCs yet.

I also wrote the OMAP driver. Of course it uses the OMAP specific PWM drivers.

I think after full integration of PWM frameworks as GPIO does, It will
be replace with new PWM frameworks.

Thank you,
Kyungmin Park


On Fri, Oct 9, 2009 at 3:36 AM, Bill Gatliff <bgat@...lgatliff.com> wrote:
> Trilok Soni wrote:
>>
>> Adding Bill Gatliff.
>>
>> Hi Kyungmin,
>>
>> Most of the driver looks fine. I have only one generic comment, but
>> not for this driver:
>>
>> - Someone should really work on getting PWM framework (may be the one
>> written by Bill Gatliff) into the kernel, because
>>  if we don't do this and if new PWM controller provides it's own APIs
>> then we can't leverage the chips using them, like the
>>  case here for ISA1000 and ISA1200. These chips are using the pwm
>> APIs exported by Samsung PWM controller, but it would
>>  be painful to integrate other PWM controller if that has slightly
>> little different API due to its nature.
>>
>>  So, it would be better to get one generic PWM framework mainline in
>> the kernel.
>>
>
> I can repost for review, if you like.
>
> The only objection I received last time, IIRC, was that I proffered it as a
> "generic" API but only provided support for a couple of AT91 parts.  I
> haven't had much time to add other support, so I haven't pushed for
> inclusion.
>
> I would be happy to coordinate the development/migration of support to the
> API.  I can still do the AT91 parts and probably PXA, maybe
> OMAP3430/Beagleboard.  But I would need others to help me with the rest.
>
> b.g.
>
> --
> Bill Gatliff
> bgat@...lgatliff.com
>
> --
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