linux-kernel - Re: [PATCH] thermal: armada: read stable temp on Armada XP

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Date:	Wed, 25 Feb 2015 19:38:26 +0100
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>,
	Tyler Hall <tylerwhall@...il.com>
CC:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>
Subject: Re: [PATCH] thermal: armada: read stable temp on Armada XP

Hi Ezequiel,

On 25/02/2015 19:17, Ezequiel Garcia wrote:
> On 02/25/2015 02:04 PM, Gregory CLEMENT wrote:
>>>
>>> My conclusions about these registers are based on experimental data. The
>>> documentation is very sparse, but the Thermal Manager Control and Status
>>> Register looks like the preferred register given the way it is laid out in the
>>> public spec.
>>
>> Ezequiel,
>>
>> as you worked on this do you know why we used the Thermal Sensor Status Register
>> instead of the Thermal Manager Control and Status Register ?
>> My first guess is that the giving the name of the registers the 1st one made
>> more sens to use for a thermal sensor.
>>
> 
> Actually, we based this driver in the vendor bootloader. The specs weren't
> of much use back then.
> 


Thanks for your prompt feedback. So we don't have much more information about
the sensor. :(

I will try to get information from Marvell.


Tyler,
In the meantime could you double check your values? The temperature on my board
seemed broken on my board. If needed I can check on an other board. By the way
on which board/product did you try it?


Thanks,

Gregory

-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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