linux-kernel - Re: [PATCH 1/3] PWM: add pwm framework support

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Date:	Mon, 4 Jul 2011 16:19:24 +0200
From:	Kurt Van Dijck <kurt.van.dijck@....be>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Ryan Mallon <rmallon@...il.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Bill Gatliff <bgat@...lgatliff.com>,
	linux-kernel@...r.kernel.org, Ryan Mallon <ryan@...ewatersys.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] PWM: add pwm framework support

On Mon, Jul 04, 2011 at 03:53:07PM +0200, Arnd Bergmann wrote:
> On Monday 04 July 2011, Kurt Van Dijck wrote:
> > With socketCAN, we encountered a similar problem. Every chip maker
> > tries to create added value by means of special options. You can't
> > support them all in the framework. Therefore, sysfs can be added
> > to configure special things.
> 
> I would expect that pwm is much simpler than CAN,
ack
> so the amount
> of creativity there is also limited.
That is true for a single PWM channel.
With multiple PWM channels, hardware design tends to be creative in coupling
several channels together somehow in order to create some diesel engine
control signal ...
> 
> 	Arnd

Anyway, I explained my concern. It's just _an_ opinion.
Kurt
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