linux-kernel - Re: [PATCH 8/9] ARM i.MX53: Add pwms to dtsi

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Message-ID: <20120907132955.GH29340@avionic-0098.mockup.avionic-design.de>
Date:	Fri, 7 Sep 2012 15:29:55 +0200
From:	Thierry Reding <thierry.reding@...onic-design.de>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	Shawn Guo <shawn.guo@...aro.org>,
	linux-arm-kernel@...ts.infradead.org,
	HACHIMI Samir <shachimi@...neo-embedded.com>,
	linux-kernel@...r.kernel.org,
	Benoît Thébaudeau 
	<benoit.thebaudeau@...ansee.com>
Subject: Re: [PATCH 8/9] ARM i.MX53: Add pwms to dtsi

On Fri, Aug 31, 2012 at 03:07:23PM +0200, Sascha Hauer wrote:
> On Fri, Aug 31, 2012 at 06:32:20AM +0800, Shawn Guo wrote:
> > On Tue, Aug 28, 2012 at 01:48:23PM +0200, Sascha Hauer wrote:
[...]
> > >  arch/arm/boot/dts/imx53.dtsi        |   14 ++++++++++++++
> > >  arch/arm/mach-imx/clk-imx51-imx53.c |    4 ++++
> > >  2 files changed, 18 insertions(+)
> > > 
> > > diff --git a/arch/arm/boot/dts/imx53.dtsi b/arch/arm/boot/dts/imx53.dtsi
> > > index cd37165..7ec17e4 100644
> > > --- a/arch/arm/boot/dts/imx53.dtsi
> > > +++ b/arch/arm/boot/dts/imx53.dtsi
> > > @@ -189,6 +189,20 @@
> > >  				status = "disabled";
> > >  			};
> > >  
> > > +			pwm1: pwm@...b4000 {
> > > +				#pwm-cells = <3>;
> > 
> > pwm-cells should be 2?
> 
> Yes, right. We have a patch internally that allows us to pass a
> 'inverted' flag to the pwm, hence I accidently have 3 here.

There are patches in for-next that add support for setting the PWM
polarity, though there's currently no support for specifying it via a
third cell in the specifier. Would you mind sharing the patches that add
this?

Thierry

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