linux-kernel - Re: [PATCH v5 3/4] ARM: tegra: Add thermal trip points for Jetson TK1

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Message-ID: <542310EB.7050802@kapsi.fi>
Date:	Wed, 24 Sep 2014 21:43:55 +0300
From:	Mikko Perttunen <mikko.perttunen@...si.fi>
To:	Eduardo Valentin <edubezval@...il.com>
CC:	Mikko Perttunen <mperttunen@...dia.com>, rui.zhang@...el.com,
	swarren@...dotorg.org, thierry.reding@...il.com,
	linux-pm@...r.kernel.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	juha-matti.tilli@....fi
Subject: Re: [PATCH v5 3/4] ARM: tegra: Add thermal trip points for Jetson
 TK1

On 09/24/2014 09:41 PM, Eduardo Valentin wrote:
> On Wed, Sep 24, 2014 at 09:34:16PM +0300, Mikko Perttunen wrote:
>> On 09/24/2014 09:32 PM, Eduardo Valentin wrote:
>>> Hello Mikko,
>>>
>>> On Thu, Aug 21, 2014 at 01:17:21PM +0300, Mikko Perttunen wrote:
>>>> This adds critical trip points to the Jetson TK1 device tree.
>>>> The device will do a controlled shutdown when either the CPU, GPU
>>>> or MEM thermal zone reaches 101 degrees Celsius.
>>>>
>>>> Signed-off-by: Mikko Perttunen <mperttunen@...dia.com>
>>>> ---
>>>> v5: added cooling-maps nodes
>>>>
>>>
>>> OK. But no cooling map entry in it. What was the reason again you don't
>>> need/want to add the maps?
>>
>> There is currently no cooling device to map to.
>
> Not even cpufreq cooling? Is CPUfreq operational in Tegra?

Indeed, it is not currently operational (except on Tegra20). There is a 
series for Tegra124 but it needs more work. Not going in during this cycle.

>
>>
>> Mikko
>>
>>>
>>>>    arch/arm/boot/dts/tegra124-jetson-tk1.dts | 41 +++++++++++++++++++++++++++++++
>>>>    1 file changed, 41 insertions(+)
>>>>
>>>> diff --git a/arch/arm/boot/dts/tegra124-jetson-tk1.dts b/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>>>> index 0cdb5cf..bcdab7f 100644
>>>> --- a/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>>>> +++ b/arch/arm/boot/dts/tegra124-jetson-tk1.dts
>>>> @@ -1876,4 +1876,45 @@
>>>>    			 <&tegra_car TEGRA124_CLK_EXTERN1>;
>>>>    		clock-names = "pll_a", "pll_a_out0", "mclk";
>>>>    	};
>>>> +
>>>> +	thermal-zones {
>>>> +		cpu {
>>>> +			trips {
>>>> +				trip@0 {
>>>> +					temperature = <101000>;
>>>> +					hysteresis = <0>;
>>>> +					type = "critical";
>>>> +				};
>>>> +			};
>>>> +
>>>> +			cooling-maps {
>>>> +			};
>>>> +		};
>>>> +
>>>> +		mem {
>>>> +			trips {
>>>> +				trip@0 {
>>>> +					temperature = <101000>;
>>>> +					hysteresis = <0>;
>>>> +					type = "critical";
>>>> +				};
>>>> +			};
>>>> +
>>>> +			cooling-maps {
>>>> +			};
>>>> +		};
>>>> +
>>>> +		gpu {
>>>> +			trips {
>>>> +				trip@0 {
>>>> +					temperature = <101000>;
>>>> +					hysteresis = <0>;
>>>> +					type = "critical";
>>>> +				};
>>>> +			};
>>>> +
>>>> +			cooling-maps {
>>>> +			};
>>>> +		};
>>>> +	};
>>>>    };
>>>> --
>>>> 1.8.1.5
>>>>
>>> --
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>>>
>>

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