linux-kernel - Re: [PATCH v3 4/4] ARM: tegra: dalmore: add thermal zones for nct1008

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Message-ID: <53FBEF37.2040008@nvidia.com>
Date:	Tue, 26 Aug 2014 10:21:43 +0800
From:	Wei Ni <wni@...dia.com>
To:	Eduardo Valentin <edubezval@...il.com>
CC:	<khali@...ux-fr.org>, <linux@...ck-us.net>,
	<swarren@...dotorg.org>, <lm-sensors@...sensors.org>,
	<linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 4/4] ARM: tegra: dalmore: add thermal zones for nct1008

On 08/25/2014 07:08 PM, Eduardo Valentin wrote:
> On Mon, Aug 25, 2014 at 02:29:48PM +0800, Wei Ni wrote:
>> From: lightning314 <wni@...dia.com>
>>
>> Add dt node to describe the thermal zone for the nct1008.
>>
>> Signed-off-by: Wei Ni <wni@...dia.com>
>> ---
>>  arch/arm/boot/dts/tegra114-dalmore.dts | 20 +++++++++++++++++++-
>>  1 file changed, 19 insertions(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boot/dts/tegra114-dalmore.dts b/arch/arm/boot/dts/tegra114-dalmore.dts
>> index 5c21d21..94a1b5d 100644
>> --- a/arch/arm/boot/dts/tegra114-dalmore.dts
>> +++ b/arch/arm/boot/dts/tegra114-dalmore.dts
>> @@ -779,12 +779,14 @@
>>  				<&gpio TEGRA_GPIO(V, 3) GPIO_ACTIVE_HIGH>;
>>  		};
>>  
>> -		temperature-sensor@4c {
>> +		nct1008: temperature-sensor@4c {
>>  			compatible = "onnn,nct1008";
>>  			reg = <0x4c>;
>>  			vcc-supply = <&palmas_ldo6_reg>;
>>  			interrupt-parent = <&gpio>;
>>  			interrupts = <TEGRA_GPIO(O, 4) IRQ_TYPE_LEVEL_LOW>;
>> +
>> +			#thermal-sensor-cells = <1>;
>>  		};
>>  	};
>>  
>> @@ -1283,4 +1285,20 @@
>>  			 <&tegra_car TEGRA114_CLK_EXTERN1>;
>>  		clock-names = "pll_a", "pll_a_out0", "mclk";
>>  	};
>> +
>> +	thermal-zones {
>> +		nct1008-local {
>> +			polling-delay-passive = <2000>; /* milliseconds */
>> +			polling-delay = <0>; /* milliseconds */
>> +
>> +			thermal-sensors = <&nct1008 0>;
>> +		};
>> +
>> +		nct1008-remote {
>> +			polling-delay-passive = <1000>; /* milliseconds */
>> +			polling-delay = <0>; /* milliseconds */
>> +
>> +			thermal-sensors = <&nct1008 1>;
>> +		};
>> +	};
> 
> The above zones misses the required properties, as per the thermal.txt
> binding description. Could you please have a look on those that are
> required and improve the zones above?

I changed the thermal.txt in the patch 3/4, to move these two properties
to optional property.
On the Dalmore, we just need to register these two sensors as thermal
zone devices.
Indeed, we have a skin-temperature driver, which used these two thermal
zone deives' temperature to estimator the skin temperature, so we
doesn't need to set trips and bind with any cooling devices on them.

Thanks.
Wei.

> 
>>  };
>> -- 
>> 1.8.1.5
>>
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