linux-kernel - Re: [PATCH v2 4/8] gpio: dt-bindings: Add documentation for Aspeed GPIO controllers

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Date:   Fri, 19 Aug 2016 09:36:42 -0500
From:   Rob Herring <robh@...nel.org>
To:     Andrew Jeffery <andrew@...id.au>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Joel Stanley <joel@....id.au>,
        Alexandre Courbot <gnurou@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Jeremy Kerr <jk@...abs.org>, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 4/8] gpio: dt-bindings: Add documentation for Aspeed
 GPIO controllers

On Fri, Aug 19, 2016 at 10:14:10PM +0930, Andrew Jeffery wrote:
> Signed-off-by: Andrew Jeffery <andrew@...id.au>
> ---
> 
> Since v1:
> 
> Rob: I haven't added your Acked-by here as I've made the following changes and
> wanted to get your input:
> 
> * Remove interrupt-controller as an optional property
> * Defer to interrupt-controller bindings document for sub-node properties
> 
> I had a discussion with Joel about whether the interrupt-controller capability
> should be optional and the conclusion was that it should always be configured
> by the driver. This makes an optional interrupt-controller property feel
> redundant (and possibly inaccurate if left out) so I've removed it.

I don't follow. What do you mean byt "configured by the driver". If the 
block supports interrupts, then it should be marked as an 
interrupt-controller. It never should have been optional. The OS can 
ignore the interrupt properties if it chooses. 

Rob