linux-kernel - Re: [PATCH v5 2/4] arm64: dts: ti: j721e: Add VTM node

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Date:   Wed, 13 Apr 2022 05:13:56 +0530
From:   "J, KEERTHY" <j-keerthy@...com>
To:     Vignesh Raghavendra <vigneshr@...com>, <robh+dt@...nel.org>,
        <daniel.lezcano@...aro.org>, <rui.zhang@...el.com>,
        <amitk@...nel.org>, <kristo@...nel.org>
CC:     <linux-pm@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 2/4] arm64: dts: ti: j721e: Add VTM node



On 4/12/2022 10:39 PM, Vignesh Raghavendra wrote:
> Hi Keerthy
> 
> On 12/04/22 3:44 pm, Keerthy wrote:
>> VTM stands for Voltage Thermal Management
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>   .../boot/dts/ti/k3-j721e-mcu-wakeup.dtsi      |  9 +++
>>   arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi  | 73 +++++++++++++++++++
>>   arch/arm64/boot/dts/ti/k3-j721e.dtsi          |  4 +
>>   3 files changed, 86 insertions(+)
>>   create mode 100644 arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi
>>
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
>> index b4972dfb7da8..6290f563b8e7 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j721e-mcu-wakeup.dtsi
>> @@ -418,4 +418,13 @@
>>   		interrupt-names = "int0", "int1";
>>   		bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
>>   	};
>> +
>> +	wkup_vtm0: wkup_vtm0@...40000 {
>> +		compatible = "ti,j721e-vtm";
>> +		reg = <0x0 0x42040000 0x0 0x350>,
>> +			<0x0 0x42050000 0x0 0x350>,
>> +			<0x0 0x43000300 0x0 0x10>;
> 
> Please follow convention of using 0x00 as rest of the file:

Okay.

> 
> 		reg = <0x00 0x42040000 0x00 0x350>,
> 		....
> 
>> +		power-domains = <&k3_pds 154 TI_SCI_PD_EXCLUSIVE>;
>> +		#thermal-sensor-cells = <1>;
>> +	};
>>   };
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi
>> new file mode 100644
>> index 000000000000..e922042f356f
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/ti/k3-j721e-thermal.dtsi
>> @@ -0,0 +1,73 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +
>> +#include <dt-bindings/thermal/thermal.h>
>> +
>> +wkup_thermal: wkup_thermal {
>> +	polling-delay-passive = <250>; /* milliseconds */
>> +	polling-delay = <500>; /* milliseconds */
>> +	thermal-sensors = <&wkup_vtm0 0>;
>> +
>> +	trips {
>> +		wkup_crit: wkup_crit {
> 
> 
> Here and elsewhere no "-" in node names please.

I believe you meant no "_" ?

> 
> You can use:
> 
> https://github.com/nmenon/kernel_patch_verify
> kpv -C -n <no of commits>
> 
> This catches most issues like above

Okay

> 
>> +			temperature = <125000>; /* milliCelsius */
>> +			hysteresis = <2000>; /* milliCelsius */
>> +			type = "critical";
>> +		};
>> +	};
>> +};
>> +
>> +mpu_thermal: mpu_thermal {
>> +	polling-delay-passive = <250>; /* milliseconds */
>> +	polling-delay = <500>; /* milliseconds */
>> +	thermal-sensors = <&wkup_vtm0 1>;
>> +
>> +	trips {
>> +		mpu_crit: mpu_crit {
>> +			temperature = <125000>; /* milliCelsius */
>> +			hysteresis = <2000>; /* milliCelsius */
>> +			type = "critical";
>> +		};
>> +	};
>> +};
>> +
>> +c7x_thermal: c7x_thermal {
>> +	polling-delay-passive = <250>; /* milliseconds */
>> +	polling-delay = <500>; /* milliseconds */
>> +	thermal-sensors = <&wkup_vtm0 2>;
>> +
>> +	trips {
>> +		c7x_crit: c7x_crit {
>> +			temperature = <125000>; /* milliCelsius */
>> +			hysteresis = <2000>; /* milliCelsius */
>> +			type = "critical";
>> +		};
>> +	};
>> +};
>> +
>> +gpu_thermal: gpu_thermal {
>> +	polling-delay-passive = <250>; /* milliseconds */
>> +	polling-delay = <500>; /* milliseconds */
>> +	thermal-sensors = <&wkup_vtm0 3>;
>> +
>> +	trips {
>> +		gpu_crit: gpu_crit {
>> +			temperature = <125000>; /* milliCelsius */
>> +			hysteresis = <2000>; /* milliCelsius */
>> +			type = "critical";
>> +		};
>> +	};
>> +};
>> +
>> +r5f_thermal: r5f_thermal {
>> +	polling-delay-passive = <250>; /* milliseconds */
>> +	polling-delay = <500>; /* milliseconds */
>> +	thermal-sensors = <&wkup_vtm0 4>;
>> +
>> +	trips {
>> +		r5f_crit: r5f_crit {
>> +			temperature = <125000>; /* milliCelsius */
>> +			hysteresis = <2000>; /* milliCelsius */
>> +			type = "critical";
>> +		};
>> +	};
>> +};
>> diff --git a/arch/arm64/boot/dts/ti/k3-j721e.dtsi b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
>> index 0e23886c9fd1..6979863eb500 100644
>> --- a/arch/arm64/boot/dts/ti/k3-j721e.dtsi
>> +++ b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
>> @@ -181,6 +181,10 @@
>>   				 <0x07 0x00000000 0x07 0x00000000 0x01 0x00000000>; /* FSS OSPI1 data region 3*/
>>   		};
>>   	};
>> +
>> +	thermal_zones: thermal-zones {
>> +		#include "k3-j721e-thermal.dtsi"
>> +	};
> 
> Bit weird representation, any reason why thermal-zones {} cannot be
> moved into k3-j721e-thermal.dtsi?

Okay. This could be moved. This is typically done when we have different 
zones defined under different dtsi files. Like in the case of 
omap5/dra7. The same was followed here. You are right this could be 
moved as we have all the zones under one dtsi.

Regards,
Keerthy

> 
>>   };
>>   
>>   /* Now include the peripherals for each bus segments */
> 
> 
> Regards
> Vignesh