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

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Date:	Wed, 24 Sep 2014 14:48:45 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Mikko Perttunen <mikko.perttunen@...si.fi>
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

Hello Mikko,

On Wed, Sep 24, 2014 at 09:43:55PM +0300, Mikko Perttunen wrote:
> 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.
> 

OK. Now I understand. In this case, can you please explain the situation
with a TODO comment inside the cooling-maps?

The way it is now, looks awkwards.

> >
> >>
> >> 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
> >>>>
> >>> --
> >>> To unsubscribe from this list: send the line "unsubscribe linux-tegra" in
> >>> the body of a message to majordomo@...r.kernel.org
> >>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> >>>
> >>
> 
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