linux-kernel - Re: [PATCH v3 1/3] dt-bindings: mfd: add lubbock-io binding

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Message-ID: <87lhkyh8m3.fsf@free.fr>
Date:	Mon, 19 Jan 2015 20:29:40 +0100
From:	Robert Jarzmik <robert.jarzmik@...e.fr>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Daniel Mack <daniel@...que.org>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Arnd Bergmann <arnd@...db.de>,
	Dmitry Eremin-Solenikov <dbaryshkov@...il.com>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 1/3] dt-bindings: mfd: add lubbock-io binding

Lee Jones <lee.jones@...aro.org> writes:

> On Fri, 16 Jan 2015, Robert Jarzmik wrote:
>
>> Add a binding for lubbock motherboard IO board.
>> 
>> Signed-off-by: Robert Jarzmik <robert.jarzmik@...e.fr>
>> ---
>>  .../devicetree/bindings/mfd/lubbock-io.txt         | 26 ++++++++++++++++++++++
>>  1 file changed, 26 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mfd/lubbock-io.txt
>> 
>> diff --git a/Documentation/devicetree/bindings/mfd/lubbock-io.txt b/Documentation/devicetree/bindings/mfd/lubbock-io.txt
>> new file mode 100644
>> index 0000000..33c9e21
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/lubbock-io.txt
>> @@ -0,0 +1,26 @@
>> +Intel's pxa255 system development platform motherboard.
>
> s/pxa25/PXA25/
Ok.
>
> "system development platform motherboard" doesn't quite sit right with me.
>
> How about "Intel Xscale PXA255 development platform (Lubbock)"?
OK.

>
>> +This is the motherboard, or IO board, of the pxa25x development system,
>> +supporting a lubbock pxa25x SoC board.
>
> Again, this sounds weird.
Would it sound better with :
  This regroups all the CPLDs on the Lubbock motherboard, providing interrupt
  muxing, leds handling, ...
>
>> +Required properties:
>> +  - compatible : One of the following chip-specific strings:
>> +        "intel,lubbock-io"
>
> An odd thing to say with only one entry.
Right, a simple "should be" would fit better.
>
>> +  - interrupts : The first interrupt is the line the /IRQ signal the IO board
>> +                 multiplex is connected to. The only known case is GPIO0 on the
>> +                 pxa25x SoC.
>
> Can you get someone to help you re-word this into a more fluid
> sentence?
Aouch, how about this :
interrupts : The first interrupt is the SoC input interrupt connected to the
             lubbock IO board interrupt multiplexer output. The only known
             working configuration is GPIO0 on the pxa25x SoC.

>
>> +Optional properties:
>> +  - interrupts : The second optional interrupt is the base of the interrupts
>> +                 multiplexed by the lubbock motherboard. If unspecified, the
>> +                 range is fully dynamic, and the irqdomain will generate its
>> +                 interrupt base on the fly.
>> +
>> +Example:
>> +
>> +mb: lubbock-mb@0 {
>> +	compatible = "intel,lubbock-io";
>> +	interrupts = <0 IRQ_TYPE_EDGE_FALLING 400 IRQ_TYPE_NONE>;
>> +	#interrupt-cells = <2>;
>> +        interrupt-parent = <&pxairq>;
>
> Whitespace error.
Right.

> I'm guessing mb means motherboard?  I think it's unusual for a
> motherboard to have it's own driver.  Usually we provide drivers for
> the individual components/peripherals situated on the board.
Yes, mb for motherboard. Well, this driver is actually for the CPLDs on the
motherboard.  Would "lubbock-cplds" be a better choice ?

Cheers.

-- 
Robert
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