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Date:	Fri, 14 Feb 2014 15:08:25 +0100
From:	Belisko Marek <marek.belisko@...il.com>
To:	Mark Rutland <mark.rutland@....com>
Cc:	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	Pawel Moll <Pawel.Moll@....com>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	"rob@...dley.net" <rob@...dley.net>,
	"jdelvare@...e.de" <jdelvare@...e.de>,
	"linux@...ck-us.net" <linux@...ck-us.net>,
	"grant.likely@...aro.org" <grant.likely@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>,
	"hns@...delico.com" <hns@...delico.com>
Subject: Re: [PATCH] hwmon: twl4030-madc-hwmon: Add device tree support.

On Fri, Feb 14, 2014 at 2:31 PM, Mark Rutland <mark.rutland@....com> wrote:
> On Fri, Feb 14, 2014 at 01:20:58PM +0000, Marek Belisko wrote:
>> Signed-off-by: Marek Belisko <marek@...delico.com>
>> ---
>>  Documentation/devicetree/bindings/hwmon/twl4030-madc-hwmon.txt |  9 +++++++++
>>  drivers/hwmon/twl4030-madc-hwmon.c                             | 10 ++++++++++
>>  2 files changed, 19 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/hwmon/twl4030-madc-hwmon.txt
>>
>> diff --git a/Documentation/devicetree/bindings/hwmon/twl4030-madc-hwmon.txt b/Documentation/devicetree/bindings/hwmon/twl4030-madc-hwmon.txt
>> new file mode 100644
>> index 0000000..e8016d1
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/hwmon/twl4030-madc-hwmon.txt
>> @@ -0,0 +1,9 @@
>> +TWL4030 MADC hwmon.
>> +
>> +Required properties:
>> +- compatible: "ti,twl4030-madc-hwmon"
>> +
>> +Example:
>> +madc-hwmon {
>> +     compatible = "ti,twl4030-madc-hwmon";
>> +};
>
> Huh?
>
> What is this a binding for? From a look at the driver in mainline this
> just calls into functions from the twl4030 madc driver (which doesn't
> seem to have a binding).
I post bindings for twl4030-madc [1]. Without probing this driver
other things will not work (twl4030-madc-battery e.g.).
Is there better way to handle this situation?
>
> This doesn't look like a description of hardware, but rather a hack to
> get a Linux driver to probe. As far as I can see, no useful information
> is given by this binding.
>
> Thanks,
> Mark.

BR,

marek

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