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Subject: Re: [PATCH v2 14/16] arm64: dts: mt7622: add thermal and related
 nodes
To:     Sean Wang <sean.wang@mediatek.com>
Cc:     robh+dt@kernel.org, mark.rutland@arm.com,
        devicetree@vger.kernel.org, linux-mediatek@lists.infradead.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
References: <cover.1517910489.git.sean.wang@mediatek.com>
 <687a7c43e3e3260ebdf004a96d2cde143f563250.1517910489.git.sean.wang@mediatek.com>
 <4db5c81b-0e55-3676-d7c8-d1b6aefb99c4@gmail.com>
 <1518148312.9025.17.camel@mtkswgap22>
From:   Matthias Brugger <matthias.bgg@gmail.com>
Message-ID: <b7d74cbb-9ad8-23cb-aa3c-e9704aafa107@gmail.com>
Date:   Mon, 12 Feb 2018 12:55:44 +0100
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On 02/09/2018 04:51 AM, Sean Wang wrote:
> On Wed, 2018-02-07 at 12:43 +0100, Matthias Brugger wrote:
>>
>> On 02/06/2018 10:53 AM, sean.wang@mediatek.com wrote:
>>> From: Sean Wang <sean.wang@mediatek.com>
>>>
>>> add nodes for the thermal controller and associated thermal zone using
>>> CPU as the cooling device for each trip point. In addition, add a fixup
>>> for thermal_calibration on nvmem should be 12 bytes as the minimal
>>> requirement.
>>>
>>> Signed-off-by: Sean Wang <sean.wang@mediatek.com>
>>> ---
>>>  arch/arm64/boot/dts/mediatek/mt7622.dtsi | 72 +++++++++++++++++++++++++++++++-
>>>  1 file changed, 71 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
>>> index e6dd4f6..6cf67dd 100644
>>> --- a/arch/arm64/boot/dts/mediatek/mt7622.dtsi
>>> +++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
>>> @@ -12,6 +12,7 @@
>>>  #include <dt-bindings/phy/phy.h>
>>>  #include <dt-bindings/power/mt7622-power.h>
>>>  #include <dt-bindings/reset/mt7622-reset.h>
>>> +#include <dt-bindings/thermal/thermal.h>
>>>  
>>>  / {
>>>  	compatible = "mediatek,mt7622";
>>> @@ -75,6 +76,7 @@
>>>  				 <&apmixedsys CLK_APMIXED_MAIN_CORE_EN>;
>>>  			clock-names = "cpu", "intermediate";
>>>  			operating-points-v2 = <&cpu_opp_table>;
>>> +			#cooling-cells = <2>;
>>>  			enable-method = "psci";
>>>  			clock-frequency = <1300000000>;
>>>  		};
>>> @@ -119,6 +121,58 @@
>>>  		};
>>>  	};
>>>  
>>> +	thermal-zones {
>>> +		cpu_thermal: cpu-thermal {
>>> +			polling-delay-passive = <1000>;
>>> +			polling-delay = <1000>;
>>> +
>>> +			thermal-sensors = <&thermal 0>;
>>> +
>>> +			trips {
>>> +				cpu_passive: cpu-passive {
>>> +					temperature = <47000>;
>>> +					hysteresis = <2000>;
>>> +					type = "passive";
>>> +				};
>>> +
>>> +				cpu_active: cpu-active {
>>> +					temperature = <67000>;
>>> +					hysteresis = <2000>;
>>> +					type = "active";
>>> +				};
>>> +
>>> +				cpu_hot: cpu-hot {
>>> +					temperature = <87000>;
>>> +					hysteresis = <2000>;
>>> +					type = "hot";
>>> +				};
>>> +
>>> +				cpu-crit {
>>> +					temperature = <107000>;
>>> +					hysteresis = <2000>;
>>> +					type = "critical";
>>> +				};
>>> +			};
>>> +
>>> +			cooling-maps {
>>> +				map0 {
>>> +					trip = <&cpu_passive>;
>>> +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
>>> +				};
>>> +
>>> +				map1 {
>>> +					trip = <&cpu_active>;
>>> +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
>>> +				};
>>> +
>>> +				map2 {
>>> +					trip = <&cpu_hot>;
>>> +					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
>>> +				};
>>> +			};
>>> +		};
>>> +	};
>>> +
>>>  	timer {
>>>  		compatible = "arm,armv8-timer";
>>>  		interrupt-parent = <&gic>;
>>> @@ -201,7 +255,7 @@
>>>  		#size-cells = <1>;
>>>  
>>>  		thermal_calibration: calib@198 {
>>> -			reg = <0x198 0x8>;
>>> +			reg = <0x198 0xc>;
>>
>> Any reason why this is not part of patch 8/16?
>>
> 
> There's no strong reason wanting me to do that. patch 8 has contained a
> lot of nodes and patch 16 is present just in v2. So, I felt it should be
> a little bit easy that people reviews those patches if they are put into
> separate patches. But, It's still fine to make them into one in the next
> version.
> 

Please add it to 8/16 as this is where you define the node in the first place.

Thanks!