linux-kernel - Re: [PATCH V4] gpio: New driver for LSI ZEVIO SoCs

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Date:	Tue, 27 Aug 2013 14:11:14 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Mark Rutland <mark.rutland@....com>
CC:	Fabian Vogt <fabian@...ter-vogt.de>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linus.walleij@...aro.org" <linus.walleij@...aro.org>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	Pawel Moll <Pawel.Moll@....com>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"ian.campbell@...rix.com" <ian.campbell@...rix.com>
Subject: Re: [PATCH V4] gpio: New driver for LSI ZEVIO SoCs

On 08/27/2013 08:40 AM, Mark Rutland wrote:
> On Sun, Aug 25, 2013 at 08:49:40PM +0100, Fabian Vogt wrote:
>> This driver supports the GPIO controller found in LSI ZEVIO SoCs.
>> It has been successfully tested on a TI nspire CX calculator.
>> ---
>>  .../devicetree/bindings/gpio/gpio-zevio.txt        |  18 ++
>>  drivers/gpio/Kconfig                               |   6 +
>>  drivers/gpio/Makefile                              |   1 +
>>  drivers/gpio/gpio-zevio.c                          | 214 +++++++++++++++++++++
>>  4 files changed, 239 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/gpio/gpio-zevio.txt
>>  create mode 100644 drivers/gpio/gpio-zevio.c
>>
>> diff --git a/Documentation/devicetree/bindings/gpio/gpio-zevio.txt b/Documentation/devicetree/bindings/gpio/gpio-zevio.txt
>> new file mode 100644
>> index 0000000..892f953
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/gpio/gpio-zevio.txt
>> @@ -0,0 +1,18 @@
>> +Zevio GPIO controller
>> +
>> +Required properties:
>> +- compatible = "lsi,zevio-gpio"
>> +- reg = <BASEADDR SIZE>
>> +- #gpio-cells = <2>
>> +- gpio-controller;
> 
> I take it there's nothing else known about at present that we might want
> to describe in future (e.g. input clocks)?
> 
> This is more for the other dt maintainers, but I've seen a lot of
> variation in how we describe properties, and it would be nice to unify
> that. Does anyone fancy writing a document pushing for some standard
> terminology and formatting, or should I?

I was hoping that the DT schema system would tighten this up, since
there would be specific syntax in the schema to describe all these options.

I was thinking of writing a DT binding review checklist, but so far
haven't made time to do so. It'd probably be reasonable to include any
specific wording requirements for property descriptions in that document.
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