linux-kernel - Re: [PATCH net-next v2] dt-bindings: net: ath11k: document the inputs of the ath11k on WCN6855

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Message-ID: <878qw6hs4s.fsf@kernel.org>
Date: Thu, 05 Sep 2024 21:28:35 +0300
From: Kalle Valo <kvalo@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: "David S . Miller" <davem@...emloft.net>,  Eric Dumazet
 <edumazet@...gle.com>,  Jakub Kicinski <kuba@...nel.org>,  Paolo Abeni
 <pabeni@...hat.com>,  Rob Herring <robh@...nel.org>,  Krzysztof Kozlowski
 <krzk+dt@...nel.org>,  Conor Dooley <conor+dt@...nel.org>,  Jeff Johnson
 <jjohnson@...nel.org>,  linux-wireless@...r.kernel.org,
  netdev@...r.kernel.org,  devicetree@...r.kernel.org,
  ath11k@...ts.infradead.org,  linux-kernel@...r.kernel.org,  Bartosz
 Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [PATCH net-next v2] dt-bindings: net: ath11k: document the
 inputs of the ath11k on WCN6855

Bartosz Golaszewski <brgl@...ev.pl> writes:

> On Thu, Sep 5, 2024 at 5:47 PM Kalle Valo <kvalo@...nel.org> wrote:
>>
>> Bartosz Golaszewski <brgl@...ev.pl> writes:
>>
>> >> > +  - if:
>> >> > +      properties:
>> >> > +        compatible:
>> >> > +          contains:
>> >> > +            const: pci17cb,1103
>> >> > +    then:
>> >> > +      required:
>> >> > +        - vddrfacmn-supply
>> >> > +        - vddaon-supply
>> >> > +        - vddwlcx-supply
>> >> > +        - vddwlmx-supply
>> >> > +        - vddrfa0p8-supply
>> >> > +        - vddrfa1p2-supply
>> >> > +        - vddrfa1p8-supply
>> >> > +        - vddpcie0p9-supply
>> >> > +        - vddpcie1p8-supply
>> >>
>> >> Like we discussed before, shouldn't these supplies be optional as not
>> >> all modules need them?
>> >>
>> >
>> > The answer is still the same: the ATH11K inside a WCN6855 does - in
>> > fact - always need them. The fact that the X13s doesn't define them is
>> > bad representation of HW and I'm fixing it in a subsequent DTS patch.
>>
>> But, like we discussed earlier, M.2 boards don't need these so I think
>> this should be optional.
>>
>
> If they are truly dynamic, plug-and-play M.2 boards then they
> shouldn't need any description in device-tree. If they are M.2 sockets
> that use custom, vendor-specific pins (like what is the case on
> sc8280xp-crd and X13s) then the HW they carry needs to be described
> correctly. We've discussed that before.

Sigh. Please reread the previous discussion. In some cases we need to
set qcom,ath11k-calibration-variant even for M.2 boards.

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