linux-kernel - Re: [PATCH v2 3/3] ARM: tegra: dalmore: add thermal zones for nct1008

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Message-ID: <5316A868.7000908@nvidia.com>
Date:	Wed, 5 Mar 2014 12:30:32 +0800
From:	Wei Ni <wni@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Guenter Roeck <linux@...ck-us.net>,
	"khali@...ux-fr.org" <khali@...ux-fr.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"lm-sensors@...sensors.org" <lm-sensors@...sensors.org>
Subject: Re: [PATCH v2 3/3] ARM: tegra: dalmore: add thermal zones for nct1008

On 03/05/2014 12:26 PM, Wei Ni wrote:
> On 03/05/2014 11:14 AM, Stephen Warren wrote:
>> On 03/04/2014 08:07 PM, Wei Ni wrote:
>>> On 03/05/2014 10:58 AM, Stephen Warren wrote:
>>>> On 03/04/2014 07:30 PM, Wei Ni wrote:
>>>>> On 03/05/2014 06:23 AM, Guenter Roeck wrote:
>>>>>> On Tue, Mar 04, 2014 at 03:06:48PM -0700, Stephen Warren wrote:
>>>>>>> On 03/04/2014 04:31 AM, Wei Ni wrote:
>>>>>>>> Add dt node to describe the thermal zone for the nct1008.
>>>>>>>>
>>>>>>>> Change-Id: I0256836e52d73ec282574e4fd91df52958936e35
>>>>>>>
>>>>>>> ???????
>>>>>>>
>>>>>> I think this is for one of those open-source sites out there
>>>>>> which count open source contributions. Not Ohloh, but similar.
>>>>>> You have to specify that Change-Id to have it associate your
>>>>>> name with the patch.
>>>>>
>>>>> It's so sorry, I'm working for chromiumos, this change-id is generated
>>>>> by gerrit, I should remove it.
>>>>>
>>>>>>
>>>>>> Guenter
>>>>>>
>>>>>>>> diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts b/arch/arm/boot/dts/tegra114-dalmore.dts
>>>>>>>
>>>>>>>> +	thermal-zones {
>>>>>>>> +		nct1008-local {
>>>>>>>> +			polling-delay-passive = <2000>; /* milliseconds */
>>>>>>>
>>>>>>> Nothing can possible make use of this node, since there's no compatible
>>>>>>> value or anything else like that to bind a driver to it.
>>>>>
>>>>> We have special Tskin driver that estimator skin temperature based on
>>>>> nct1008 local and remote sensors.
>>>>
>>>> Where? Anything that gets added to the upstream kernel DT files must be
>>>> supported by a driver and binding in the upstream kernel.
>>>
>>> I didn't submit the Tskin driver yet, but the of-thermal framework can
>>> parse this node, and create thermal zone devices.
>>
>> How is that possible? There's no compatible value for the of-thermal
>> framework to know that it should process this node. It's not correct for
>> the of-thermal framework to do anything like look for a node with a
>> particular name... has the DT binding for this been reviewed by any DT
>> maintainer?
> 
> Eduardo developed the of-thermal framework, and have merged in
> linux-next, it can parse the node thermal-zones, and properties, such as
> polling-delay-passive. Please check the omap.dtsi, it also has this node.

Please check Documentation/devicetree/bindings/thermal/thermal.txt

> 
>>
> 
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