linux-kernel - Re: [PATCH 3/4] uio: introduce devicetree bindings for uio_dmem

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Message-ID: <20160518170105.GA4897@rob-hp-laptop>
Date:	Wed, 18 May 2016 12:01:05 -0500
From:	Rob Herring <robh@...nel.org>
To:	Jan Viktorin <viktorin@...ivetech.com>
Cc:	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"Hans J. Koch" <hjk@...sjkoch.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH 3/4] uio: introduce devicetree bindings for
 uio_dmem_genirq

On Tue, May 17, 2016 at 11:22:19AM +0200, Jan Viktorin wrote:
> Signed-off-by: Jan Viktorin <viktorin@...ivetech.com>
> ---
>  .../devicetree/bindings/uio/uio_dmem_genirq.txt          | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/uio/uio_dmem_genirq.txt

DT describes h/w. UIO is not a h/w block, so this does not belong in DT. 
A UIO vs. kernel driver is purely a kernel decision which shouldn't 
require a DT change.

The properties should be part of match data for a compatible string that 
needs them set. Or if they can be defined in a way that is actually a 
property of the h/w, then it would be acceptible. You'd still need to 
define compatible strings that the properties apply to.

Rob