linux-kernel - Re: [PATCH v3 4/6] [media] c8sectpfe: Update binding to reset-gpios

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Message-ID: <20150901075811.GK4796@x1>
Date:	Tue, 1 Sep 2015 08:58:11 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Rob Herring <robherring2@...il.com>
Cc:	Peter Griffin <peter.griffin@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...il.com>,
	Maxime Coquelin <maxime.coquelin@...com>,
	Patrice Chotard <patrice.chotard@...com>,
	Mauro Carvalho Chehab <mchehab@....samsung.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	hugues.fruchet@...com,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	valentinrothberg@...il.com
Subject: Re: [PATCH v3 4/6] [media] c8sectpfe: Update binding to reset-gpios

On Mon, 31 Aug 2015, Rob Herring wrote:

> On Fri, Aug 28, 2015 at 12:52 PM, Peter Griffin
> <peter.griffin@...aro.org> wrote:
> > gpio.txt documents that GPIO properties should be named
> > "[<name>-]gpios", with <name> being the purpose of this
> > GPIO for the device.
> >
> > This change has been done as one atomic commit.
> 
> dtb and kernel updates are not necessarily atomic, so you are breaking
> compatibility with older dtbs. You should certainly highlight that in
> the commit message.

Good idea.

> I only point this out. I'll leave it to platform
> maintainers whether or not this breakage is acceptable.

This driver is new.  The 'original' bindings are in next.  So this
binding is not even close to being ABI.

[...]

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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