linux-kernel - Re: [PATCH] arm: dts: AM57XX: Correct the thermal thresholds

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Message-ID: <56C1F92A.1020803@ti.com>
Date:	Mon, 15 Feb 2016 21:43:30 +0530
From:	Keerthy <a0393675@...com>
To:	Nishanth Menon <nm@...com>, Tony Lindgren <tony@...mide.com>
CC:	Eduardo Valentin <edubezval@...il.com>, Keerthy <j-keerthy@...com>,
	Dmitry Lifshitz <lifshitz@...pulab.co.il>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	lkml <linux-kernel@...r.kernel.org>,
	dt list <devicetree@...r.kernel.org>,
	linux-omap <linux-omap@...r.kernel.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	"ijc+devicetree@...lion.org.uk" <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH] arm: dts: AM57XX: Correct the thermal thresholds



On Monday 15 February 2016 09:19 PM, Nishanth Menon wrote:
> On 02/14/2016 10:27 PM, Keerthy wrote:
>>
>>
>> On Saturday 13 February 2016 04:11 AM, Tony Lindgren wrote:
>>> * Nishanth Menon <nm@...com> [160212 14:32]:
>>>> On Fri, Feb 12, 2016 at 4:23 PM, Tony Lindgren <tony@...mide.com> wrote:
>>>>> * Nishanth Menon <nm@...com> [160209 14:17]:
>>>>>> On 02/09/2016 04:09 PM, Eduardo Valentin wrote:
>>>>>>> On Mon, Feb 08, 2016 at 03:15:05PM +0530, Keerthy wrote:
>>>>>>>> The thermal threholds for am57xx are different from that of dra7.
>>>>>>>> Correcting the thresholds for the same.
>>>>>>>>
>>>>>>>> Signed-off-by: Keerthy <j-keerthy@...com>
>>>>>>>> ---
>>>>>>>>
>>>>>>>> Depends on: https://lkml.org/lkml/2016/2/8/90
>>>>>>>>
>>>>>>>>    arch/arm/boot/dts/am57xx-beagle-x15.dts | 24 ++++++++++++++++++++++++
>>>>>>>>    1 file changed, 24 insertions(+)
>>>>>>>>
>>>>>>>> Index: linux/arch/arm/boot/dts/am57xx-beagle-x15.dts
>>>>>>>> ===================================================================
>>>>>>>> --- linux.orig/arch/arm/boot/dts/am57xx-beagle-x15.dts     2016-02-08 14:57:05.514959101 +0530
>>>>>>>> +++ linux/arch/arm/boot/dts/am57xx-beagle-x15.dts  2016-02-08 14:57:05.510959168 +0530
>>>>>>>
>>>>>>> Sorry, did not bother to check, but is this the only user of am57xx?
>>>>>>
>>>>>> we will have AM57xx-IDK as well coming down the line. we already have
>>>>>> arch/arm/boot/dts/am57xx-cl-som-am57x.dts
>>>>>> arch/arm/boot/dts/am57xx-sbc-am57x.dts - not really sure what grade of
>>>>>> silicon are used in cl-SOM and sbc boards.
>>>>>
>>>>> Hmm can this one wait for v4.6 or is it critical for v4.5-rc
>>>>> cycle?
>>>>
>>>> personally, I'd like to NAK this patch -> lack of reference
>>>> documentation, and guidance for various AM57xx boards in a generic
>>>> patch should probably be followed IMHO.
>>>
>>> OK let's wait for that then.
>>
>> OK. I will send a v2 with better documentation.
>
>
>
> This data is in the AM572x datasheet:
> http://www.ti.com/lit/ds/symlink/am5728.pdf
>
> Table 5-3 in the current version contains the maximum junction
> temperatures.
>
> this indicates that there are "Commercial" and "extended" -> we may
> need to introduce just 2 dtsis -> am57xx-commercial and
> am57xx-extended and reuse those based on the part on the board. just a
> suggestion..

Or use the minimum of the 2 to be on the safer side if we have to deal 
with one dtsi?

Regards,
Keerthy
>
>