linux-kernel - Re: [RFC 6/9] dt-bindings: vendor-prefixes: add a PCI prefix for Qualcomm Atheros

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Date: Mon, 8 Jan 2024 19:56:19 -0700
From: Rob Herring <robh@...nel.org>
To: Bartosz Golaszewski <brgl@...ev.pl>
Cc: Kalle Valo <kvalo@...nel.org>, "David S . Miller" <davem@...emloft.net>, 
	Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Bjorn Andersson <andersson@...nel.org>, Konrad Dybcio <konrad.dybcio@...aro.org>, 
	Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, 
	Bjorn Helgaas <bhelgaas@...gle.com>, Heiko Stuebner <heiko@...ech.de>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, Chris Morgan <macromorgan@...mail.com>, 
	Linus Walleij <linus.walleij@...aro.org>, Geert Uytterhoeven <geert+renesas@...der.be>, 
	Arnd Bergmann <arnd@...db.de>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Nícolas F . R . A . Prado <nfraprado@...labora.com>, 
	Marek Szyprowski <m.szyprowski@...sung.com>, Peng Fan <peng.fan@....com>, 
	Robert Richter <rrichter@....com>, Dan Williams <dan.j.williams@...el.com>, 
	Terry Bowman <terry.bowman@....com>, 
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>, 
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
	Huacai Chen <chenhuacai@...nel.org>, Alex Elder <elder@...aro.org>, 
	Srini Kandagatla <srinivas.kandagatla@...aro.org>, 
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-wireless@...r.kernel.org, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-pci@...r.kernel.org, 
	Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: Re: [RFC 6/9] dt-bindings: vendor-prefixes: add a PCI prefix for
 Qualcomm Atheros

On Mon, Jan 8, 2024 at 12:22 PM Bartosz Golaszewski <brgl@...ev.pl> wrote:
>
> On Mon, Jan 8, 2024 at 8:10 PM Rob Herring <robh@...nel.org> wrote:
> >
> > On Thu, Jan 04, 2024 at 02:01:20PM +0100, Bartosz Golaszewski wrote:
> > > From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
> > >
> > > Document the PCI vendor prefix for Qualcomm Atheros so that we can
> > > define the QCA PCI devices on device tree.
> >
> > Why? vendor-prefixes.yaml is only applied to property names. 'qca'
> > should be the prefix for those.
> >
> > Rob
>
> I didn't have any better idea. PCI devices on DT are defined by their
> "pci<vendor ID>,<model ID>" compatible, not regular human-readable
> strings and this makes checkpatch.pl complain.
>
> I'm open to suggestions.

The checkpatch.pl check predates schemas and we could consider just
dropping it. The only thing it provides is checking a patch rather
than the tree (which the schema do). It's pretty hacky because it just
greps the tree for a compatible string which is not entirely accurate.
Also, we can extract an exact list of compatibles with
"dt-extract-compatibles" which would make a better check, but I'm not
sure making dtschema a dependency on checkpatch would be good.

The other option is just ignore the warning. PCI compatibles are fairly rare.

Rob