linux-kernel - Re: [PATCH v3 20/20] dt-bindings: pwm: sti: Update DT bindings with recent changes

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Date:	Fri, 10 Jun 2016 15:10:08 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Rob Herring <robh@...nel.org>
Cc:	Lee Jones <lee.jones@...aro.org>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kernel@...inux.com, maxime.coquelin@...com, patrice.chotard@...com,
	linux-pwm@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v3 20/20] dt-bindings: pwm: sti: Update DT bindings with
 recent changes

On Wed, Jun 08, 2016 at 03:51:52PM -0500, Rob Herring wrote:
> On Wed, Jun 08, 2016 at 10:21:35AM +0100, Lee Jones wrote:
> > We're renaming the 'st,pwm-num-chan' binding to 'st,pwm-num-devs' to
> > be more inline with the naming conventions of the subsystem.  Where
> > we used to treat each line as a channel, the PWM convention is to
> > describe them as devices.
> 
> That's all linux implementation details and you are breaking 
> compatibility.

While it's true that the API calls channels struct pwm_device, that's
primarily for historical reasons. It's completely fine, and in fact most
drivers already do exactly that, to internally refer to channels as
channels.

Thierry

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