linux-kernel - Re: [PATCH v6 04/16] dt-bindings: net: wireless: qcom,ath11k: describe the ath11k on QCA6390

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Date: Tue, 26 Mar 2024 17:32:55 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Kalle Valo <kvalo@...nel.org>
Cc: Marcel Holtmann <marcel@...tmann.org>, Luiz Augusto von Dentz <luiz.dentz@...il.com>, 
	"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 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Saravana Kannan <saravanak@...gle.com>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Arnd Bergmann <arnd@...db.de>, 
	Neil Armstrong <neil.armstrong@...aro.org>, Marek Szyprowski <m.szyprowski@...sung.com>, 
	Alex Elder <elder@...aro.org>, Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Abel Vesa <abel.vesa@...aro.org>, 
	Manivannan Sadhasivam <mani@...nel.org>, Lukas Wunner <lukas@...ner.de>, 
	Dmitry Baryshkov <dmitry.baryshkov@...aro.org>, linux-bluetooth@...r.kernel.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org, 
	linux-arm-msm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-pci@...r.kernel.org, linux-pm@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>, ath11k@...ts.infradead.org, 
	Johan Hovold <johan@...nel.org>
Subject: Re: [PATCH v6 04/16] dt-bindings: net: wireless: qcom,ath11k:
 describe the ath11k on QCA6390

On Tue, Mar 26, 2024 at 4:12 PM Kalle Valo <kvalo@...nel.org> wrote:
>
> Bartosz Golaszewski <brgl@...ev.pl> writes:
>
> >> >> I don't know DT well enough to know what the "required:" above means,
> >> >> but does this take into account that there are normal "plug&play" type
> >> >> of QCA6390 boards as well which don't need any DT settings?
> >> >
> >> > Do they require a DT node though for some reason?
> >>
> >> You can attach the device to any PCI slot, connect the WLAN antenna and
> >> it just works without DT nodes. I'm trying to make sure here that basic
> >> setup still works.
> >>
> >
> > Sure, definitely. I there's no DT node, then the binding doesn't apply
> > and the driver (the platform part of it) will not probe.
> >
> >> Adding also Johan and ath11k list. For example, I don't know what's the
> >> plan with Lenovo X13s, will it use this framework? I guess in theory we
> >> could have devices which use qcom,ath11k-calibration-variant from DT but
> >> not any of these supply properties?
> >>
> >
> > Good point. I will receive the X13s in a month from now. I do plan on
> > upstreaming correct support for WLAN and BT for it as well.
> >
> > I guess we can always relax the requirements once a valid use-case appears?
>
> I think we have such cases already now:
>
> $ git grep ath11k-calibration-variant -- arch
> arch/arm64/boot/dts/qcom/qcm6490-fairphone-fp5.dts:     qcom,ath11k-calibration-variant = "Fairphone_5";
> arch/arm64/boot/dts/qcom/sc8280xp-lenovo-thinkpad-x13s.dts:                     qcom,ath11k-calibration-variant = "LE_X13S";
>
> But please do check that. I'm no DT expert :)
>

You're thinking about making the required: field depend on the value
of qcom,ath11k-calibration-variant? Am I getting this right?

Bart