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Date: Tue, 9 Jan 2024 10:17:38 +0100
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Subject: Re: [RFC 6/9] dt-bindings: vendor-prefixes: add a PCI prefix for
 Qualcomm Atheros
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To: Rob Herring <robh@kernel.org>, Bartosz Golaszewski <brgl@bgdev.pl>
Cc: Kalle Valo <kvalo@kernel.org>, "David S . Miller" <davem@davemloft.net>,
 Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>,
 Paolo Abeni <pabeni@redhat.com>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, Bjorn Andersson <andersson@kernel.org>,
 Konrad Dybcio <konrad.dybcio@linaro.org>,
 Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will@kernel.org>,
 Bjorn Helgaas <bhelgaas@google.com>, Heiko Stuebner <heiko@sntech.de>,
 Jernej Skrabec <jernej.skrabec@gmail.com>,
 Chris Morgan <macromorgan@hotmail.com>,
 Linus Walleij <linus.walleij@linaro.org>,
 Geert Uytterhoeven <geert+renesas@glider.be>, Arnd Bergmann <arnd@arndb.de>,
 Neil Armstrong <neil.armstrong@linaro.org>,
 =?UTF-8?Q?N=C3=ADcolas_F_=2E_R_=2E_A_=2E_Prado?= <nfraprado@collabora.com>,
 Marek Szyprowski <m.szyprowski@samsung.com>, Peng Fan <peng.fan@nxp.com>,
 Robert Richter <rrichter@amd.com>, Dan Williams <dan.j.williams@intel.com>,
 Terry Bowman <terry.bowman@amd.com>,
 Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>,
 =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,
 Huacai Chen <chenhuacai@kernel.org>, Alex Elder <elder@linaro.org>,
 Srini Kandagatla <srinivas.kandagatla@linaro.org>,
 Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
 linux-wireless@vger.kernel.org, netdev@vger.kernel.org,
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
 linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-pci@vger.kernel.org,
 Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
References: <20240104130123.37115-1-brgl@bgdev.pl>
 <20240104130123.37115-7-brgl@bgdev.pl>
 <20240108191052.GA1893484-robh@kernel.org>
 <CAMRc=Mc7D1rVHaA4yoOC2DHDkkCptF4wjAm=24Rr=kkqM1ztjg@mail.gmail.com>
 <CAL_JsqKGrW-v=fr_9NYKg-8cho_-XbVQ92eXpjYYC1ma0_8UuA@mail.gmail.com>
From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
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On 09/01/2024 03:56, Rob Herring wrote:
> On Mon, Jan 8, 2024 at 12:22 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
>>
>> On Mon, Jan 8, 2024 at 8:10 PM Rob Herring <robh@kernel.org> wrote:
>>>
>>> On Thu, Jan 04, 2024 at 02:01:20PM +0100, Bartosz Golaszewski wrote:
>>>> From: Bartosz Golaszewski <bartosz.golaszewski@linaro.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.

Yep, the same warnings are for EEPROM and USB VID/PID compatibles, and
we live with these, so I don't think PCI should be treated differently.

Best regards,
Krzysztof