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 09:11:15 +0100
From: Johan Hovold <johan@...nel.org>
To: Kalle Valo <kvalo@...nel.org>
Cc: Bartosz Golaszewski <brgl@...ev.pl>,
	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
Subject: Re: [PATCH v6 04/16] dt-bindings: net: wireless: qcom,ath11k:
 describe the ath11k on QCA6390

On Mon, Mar 25, 2024 at 04:37:29PM +0200, Kalle Valo wrote:
> Bartosz Golaszewski <brgl@...ev.pl> writes:
> > On Mon, Mar 25, 2024 at 2:57 PM Kalle Valo <kvalo@...nel.org> wrote:
> >> Bartosz Golaszewski <brgl@...ev.pl> writes:
> >> > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >> >
> >> > Add a PCI compatible for the ATH11K module on QCA6390 and describe the
> >> > power inputs from the PMU that it consumes.
> >> >
> >> > Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> >>
> >> [...]
> >>
> >> > +allOf:
> >> > +  - if:
> >> > +      properties:
> >> > +        compatible:
> >> > +          contains:
> >> > +            const: pci17cb,1101
> >> > +    then:
> >> > +      required:
> >> > +        - vddrfacmn-supply
> >> > +        - vddaon-supply
> >> > +        - vddwlcx-supply
> >> > +        - vddwlmx-supply
> >> > +        - vddrfa0p8-supply
> >> > +        - vddrfa1p2-supply
> >> > +        - vddrfa1p7-supply
> >> > +        - vddpcie0p9-supply
> >> > +        - vddpcie1p8-supply
> >>
> >> 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.
> 
> 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?

In theory we could, but at least the WCN6855 in the X13s has a similar
set of supplies and enable gpios which are currently not fully described
in the devicetree as there has been no support for doing so thus far.
Instead we rely on the bootloader to enable the module.

I haven't had time to look at the latest attempt on adding support for
handling such resources, but eventually we'll need to address this in
some way.

Johan