linux-kernel - Re: [PATCH 8/8] arm64: defconfig: Enable NVIDIA TEGRA410 PMU

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Message-ID: <a04e5648-86c0-4930-ac2f-a824acb35941@kernel.org>
Date: Wed, 11 Feb 2026 07:19:50 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Besar Wicaksono <bwicaksono@...dia.com>, "will@...nel.org"
 <will@...nel.org>, "suzuki.poulose@....com" <suzuki.poulose@....com>,
 "robin.murphy@....com" <robin.murphy@....com>,
 "ilkka@...amperecomputing.com" <ilkka@...amperecomputing.com>
Cc: "linux-arm-kernel@...ts.infradead.org"
 <linux-arm-kernel@...ts.infradead.org>,
 "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
 "linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
 "mark.rutland@....com" <mark.rutland@....com>,
 Thierry Reding <treding@...dia.com>, Jon Hunter <jonathanh@...dia.com>,
 Vikram Sethi <vsethi@...dia.com>, Rich Wiley <rwiley@...dia.com>,
 Shanker Donthineni <sdonthineni@...dia.com>, Sean Kelley
 <skelley@...dia.com>, Yifei Wan <YWan@...dia.com>,
 Matt Ochs <mochs@...dia.com>, Nirmoy Das <nirmoyd@...dia.com>
Subject: Re: [PATCH 8/8] arm64: defconfig: Enable NVIDIA TEGRA410 PMU

On 10/02/2026 18:42, Besar Wicaksono wrote:
> 
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski <krzk@...nel.org>
>> Sent: Tuesday, February 10, 2026 10:15 AM
>> To: Besar Wicaksono <bwicaksono@...dia.com>; will@...nel.org;
>> suzuki.poulose@....com; robin.murphy@....com;
>> ilkka@...amperecomputing.com
>> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org; linux-
>> tegra@...r.kernel.org; mark.rutland@....com; Thierry Reding
>> <treding@...dia.com>; Jon Hunter <jonathanh@...dia.com>; Vikram Sethi
>> <vsethi@...dia.com>; Rich Wiley <rwiley@...dia.com>; Shanker Donthineni
>> <sdonthineni@...dia.com>; Sean Kelley <skelley@...dia.com>; Yifei Wan
>> <YWan@...dia.com>; Matt Ochs <mochs@...dia.com>; Nirmoy Das
>> <nirmoyd@...dia.com>
>> Subject: Re: [PATCH 8/8] arm64: defconfig: Enable NVIDIA TEGRA410 PMU
>>
>> External email: Use caution opening links or attachments
>>
>>
>> On 10/02/2026 17:05, Besar Wicaksono wrote:
>>>
>>>
>>>> -----Original Message-----
>>>> From: Krzysztof Kozlowski <krzk@...nel.org>
>>>> Sent: Sunday, February 8, 2026 5:18 AM
>>>> To: Besar Wicaksono <bwicaksono@...dia.com>; will@...nel.org;
>>>> suzuki.poulose@....com; robin.murphy@....com;
>>>> ilkka@...amperecomputing.com
>>>> Cc: linux-arm-kernel@...ts.infradead.org; linux-kernel@...r.kernel.org;
>> linux-
>>>> tegra@...r.kernel.org; mark.rutland@....com; Thierry Reding
>>>> <treding@...dia.com>; Jon Hunter <jonathanh@...dia.com>; Vikram Sethi
>>>> <vsethi@...dia.com>; Rich Wiley <rwiley@...dia.com>; Shanker
>> Donthineni
>>>> <sdonthineni@...dia.com>; Sean Kelley <skelley@...dia.com>; Yifei Wan
>>>> <ywan@...dia.com>; Matt Ochs <mochs@...dia.com>; Nirmoy Das
>>>> <nirmoyd@...dia.com>
>>>> Subject: Re: [PATCH 8/8] arm64: defconfig: Enable NVIDIA TEGRA410 PMU
>>>>
>>>> External email: Use caution opening links or attachments
>>>>
>>>>
>>>> On 26/01/2026 19:11, Besar Wicaksono wrote:
>>>>> Enable driver for NVIDIA TEGRA410 CMEM Latency and C2C PMU device.
>>>>
>>>> Why? Why do we want it? Which *upstream board* uses it?
>>>>
>>>
>>> These are for NVIDIA Vera platform (Tegra410 SoC).
>>
>> There is no such board (git grep), but anyway, don't explain it to me.
>> Your commit should explain such stuff.
>>
> 
> This is a server platform. There is no upstream board using this device currently.

I don't understand why server or not server matters.

If there is no upstream user of this, it is wrong to add it to
defconfig. This is upstream defconfig, not your distro.


Best regards,
Krzysztof