linux-kernel - Re: [PATCH 4/6] dt-bindings: thermal: versal: Add description for Versal Thermal

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Message-ID: <f0b4aacf-99b3-4ce6-b42a-807f90282054@amd.com>
Date: Mon, 8 Sep 2025 08:39:28 +0200
From: Michal Simek <michal.simek@....com>
To: Conor Dooley <conor@...nel.org>
Cc: linux-kernel@...r.kernel.org, monstr@...str.eu, michal.simek@...inx.com,
 git@...inx.com, Salih Erim <salih.erim@....com>,
 Anish Kadamathikuttiyil Karthikeyan Pillai
 <anish.kadamathikuttiyil-karthikeyan-pillai@....com>,
 Conor Dooley <conor+dt@...nel.org>,
 Daniel Lezcano <daniel.lezcano@...aro.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Lukasz Luba <lukasz.luba@....com>,
 "Rafael J. Wysocki" <rafael@...nel.org>, Rob Herring <robh@...nel.org>,
 Zhang Rui <rui.zhang@...el.com>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>, "open list:THERMAL" <linux-pm@...r.kernel.org>
Subject: Re: [PATCH 4/6] dt-bindings: thermal: versal: Add description for
 Versal Thermal

On 9/5/25 20:30, Conor Dooley wrote:
> On Fri, Sep 05, 2025 at 10:41:47AM +0200, Michal Simek wrote:
>> From: Salih Erim <salih.erim@....com>
>>
>> Add description of Versal Thermal which describes IO channels to
>> be binded to thermal. Constant channel of "sysmon-temp-channel" used as
>> mapped iio channel.
>>
>> One temperature zone is used for the AI Engine temperature monitoring.
>>
>> Signed-off-by: Salih Erim <salih.erim@....com>
>> Co-developed-by: Anish Kadamathikuttiyil Karthikeyan Pillai <anish.kadamathikuttiyil-karthikeyan-pillai@....com>
>> Signed-off-by: Anish Kadamathikuttiyil Karthikeyan Pillai <anish.kadamathikuttiyil-karthikeyan-pillai@....com>
>> Signed-off-by: Michal Simek <michal.simek@....com>
>> ---
>>
>>   .../bindings/thermal/xlnx,versal-thermal.yaml | 45 +++++++++++++++++++
>>   1 file changed, 45 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/thermal/xlnx,versal-thermal.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/thermal/xlnx,versal-thermal.yaml b/Documentation/devicetree/bindings/thermal/xlnx,versal-thermal.yaml
>> new file mode 100644
>> index 000000000000..c374d7ae2d2a
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/thermal/xlnx,versal-thermal.yaml
>> @@ -0,0 +1,45 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/thermal/xlnx,versal-thermal.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Xilinx Versal Thermal
>> +
>> +maintainers:
>> +  - Salih Erim <salih.erim@....com>
>> +
>> +description:
>> +  Versal Thermal uses Versal Sysmon hardware for temperature reading.
>> +  It works as sensor interface to be defined in thermal zones.
>> +
>> +properties:
>> +  compatible:
>> +    const: xlnx,versal-thermal
> 
> BTW Michal, what's the story with using amd v xlnx for bindings?
> Planning to use amd for new devices and xlnx for stuff sold before the
> purchase or something like that?

yes exactly that is the plan. Newly developed drivers or SOC will start to use 
amd prefixes instead of xlnx.
This is the IP which is around for a while that's why xlnx is still used.

> 
>> +
>> +  '#thermal-sensor-cells':
>> +    const: 1
>> +
>> +  io-channels:
>> +    maxItems: 1
>> +
>> +  io-channel-names:
>> +    const: sysmon-temp-channel
>> +
>> +required:
>> +  - compatible
>> +  - '#thermal-sensor-cells'
>> +  - io-channels
>> +  - io-channel-names
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    versal-thermal-sensor {
> 
> Drop the versal from the node name here please.
> With that,

will do.

> Acked-by: Conor Dooley <conor.dooley@...rochip.com>

Thanks,
Michal