linux-kernel - Re: [PATCH v2 1/2] dt-bindings: timer: Add NXP System Timer Module

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Message-ID: <6bca05ac-13d0-4197-b4af-5509884c83c6@linaro.org>
Date: Mon, 31 Mar 2025 10:38:17 +0200
From: Daniel Lezcano <daniel.lezcano@...aro.org>
To: Krzysztof Kozlowski <krzk@...nel.org>, tglx@...utronix.de
Cc: linux-kernel@...r.kernel.org, thomas.fossati@...aro.org,
 Larisa.Grigore@....com, ghennadi.procopciuc@....com, S32@....com,
 Ghennadi Procopciuc <ghennadi.procopciuc@....nxp.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>,
 "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
 <devicetree@...r.kernel.org>,
 "moderated list:ARM/STM32 ARCHITECTURE"
 <linux-stm32@...md-mailman.stormreply.com>,
 "moderated list:ARM/STM32 ARCHITECTURE"
 <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v2 1/2] dt-bindings: timer: Add NXP System Timer Module

On 29/03/2025 06:03, Krzysztof Kozlowski wrote:
> On 28/03/2025 14:42, Daniel Lezcano wrote:
>> Add the System Timer Module description found on the NXP s32 platform
>> and the compatible for the s32g2 variant.
>>
>> Cc: Ghennadi Procopciuc <ghennadi.procopciuc@....nxp.com>
>> Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> Cc: Thomas Fossati <thomas.fossati@...aro.org>
>> Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
>> ---
> 
> I got only this patch, no cover letter, no changelog. What happened here?

My bad, my scripts needs some more work :)

Will Cc you in the next version

>>   .../bindings/timer/nxp,stm-timer.yaml         | 50 +++++++++++++++++++
>>   1 file changed, 50 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/timer/nxp,stm-timer.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/timer/nxp,stm-timer.yaml b/Documentation/devicetree/bindings/timer/nxp,stm-timer.yaml
>> new file mode 100644
>> index 000000000000..a9c0151d62be
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/timer/nxp,stm-timer.yaml
> 
> Filename following compatible.
> 
>> @@ -0,0 +1,50 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/timer/nxp,stm-timer.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: NXP System Timer Module (STM)
>> +
>> +maintainers:
>> +  - Daniel Lezcano <daniel.lezcano@...nel.org>
>> +
>> +description:
>> +  The System Timer Module supports commonly required system and application
>> +  software timing functions. STM includes a 32-bit count-up timer and four
>> +  32-bit compare channels with a separate interrupt source for each channel.
>> +  The timer is driven by the STM module clock divided by an 8-bit prescale
>> +  value.
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - nxp,s32g-stm
> 
> Previously it was told to me there is no such soc as s32g but they are
> named differently, e.g. s32g2. See other bindings.
> 
> Please consult internally and come with one unified approach to all NXP
> bindings. Otherwise, if this is a real soc, fix this for top level
> compatibles, because there is no s32g there either.
> 
> This applies to all NXP-related patches (which I am sure was previously
> discussed on the lists).
> 
> What is confusing: previous compatible was correct and I did not ask to
> change it.

Yeah, I think the answer is straightforward. It is s32g2 and s32g3, the 
two platforms having the STM. I'll will fix the compatibles.

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