linux-kernel - Re: [PATCH V4] pwm: lpc32xx - Add a driver for the motor PWM

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Message-ID: <20140910175941.5c44837f@avionic-0020>
Date:	Wed, 10 Sep 2014 17:59:41 +0200
From:	Alban Bedel <alban.bedel@...onic-design.de>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Thierry Reding <thierry.reding@...il.com>,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-pwm@...r.kernel.org, Grant Likely <grant.likely@...aro.org>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>,
	Roland Stigge <stigge@...com.de>
Subject: Re: [PATCH V4] pwm: lpc32xx - Add a driver for the motor PWM

On Wed, 10 Sep 2014 17:51:36 +0200
Arnd Bergmann <arnd@...db.de> wrote:

> On Wednesday 10 September 2014 17:43:42 Alban Bedel wrote:
> > +- #pwm-cells: should be 3. See pwm.txt in this directory for a description of
> > +  the cells format. The only third cell flag supported by this binding is
> > +  PWM_POLARITY_INVERTED.
> 
> If you don't have multiple pwm outputs or programmable period, I would say it
> should use #pwm-cells=<1> and only pass the polarity.

There is 3 channel, so 3 PWM from the API POV, and the period is
independently programmable for each one.

Alban

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