linux-kernel - Re: [PATCH v2 1/2] dt-bindings: pinctrl: document the Milos Top Level Mode Multiplexer

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Message-ID: <a453bd90-b7c7-42eb-b769-b4c87b6dac12@oss.qualcomm.com>
Date: Thu, 3 Jul 2025 12:04:28 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Luca Weiss <luca.weiss@...rphone.com>,
        Krzysztof Kozlowski <krzk@...nel.org>
Cc: Bjorn Andersson <andersson@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] dt-bindings: pinctrl: document the Milos Top Level
 Mode Multiplexer



On 03-Jul-25 09:44, Luca Weiss wrote:
> On Thu Jul 3, 2025 at 9:41 AM CEST, Krzysztof Kozlowski wrote:
>> On Wed, Jul 02, 2025 at 05:56:16PM +0200, Luca Weiss wrote:
>>> Document the Top Level Mode Multiplexer on the Milos Platform.
>>
>> What is Milos platform? Does it have some sort of model number how we
>> usually expect? Wasn't this SM7325 or similar?
>>
>> The problem with such new naming that it awfully sounds like family
>> names, so just expand the name and explain it.
> 
> Please go argue with Bjorn/Konrad about this, wasn't my idea.
> 
> https://lore.kernel.org/linux-arm-msm/aGMI1Zv6D+K+vWZL@hu-bjorande-lv.qualcomm.com/
> https://lore.kernel.org/linux-arm-msm/b98d305b-247f-415b-8675-50d073452feb@oss.qualcomm.com/

Milos is the "real-est" name of this silicon. All the associated
S[AM]|QC[MS]s are just variations of it, with different fusing.

You'll stumble upon it across e.g. firmware build strings, as
well as in any documentation pieces.

There are various internal reasons for the switch, but the most
obvious external-facing one is not to have the user buy a devkit
and wonder whether they should use QCS9100 or QCS9075 DTB, and
why there's zero drivers code for these magic numbers (they
include SA8775P). We can simply point them to "codename" and
all C code will refer to it as well.

As for external reviewers not knowing what the platform name
refers to, this is nothing new - AMD submits colorful fish names
and it's broadly accepted practice

Konrad