linux-kernel - Re: [PATCH 2/4] dt-bindings: media: Add bindings for raspberrypi,rp1-cfe

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Date: Tue, 19 Mar 2024 10:32:38 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
 Naushir Patuck <naush@...pberrypi.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
 linux-arm-kernel@...ts.infradead.org,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Sakari Ailus <sakari.ailus@...ux.intel.com>,
 Jacopo Mondi <jacopo.mondi@...asonboard.com>,
 Kieran Bingham <kieran.bingham@...asonboard.com>,
 Mauro Carvalho Chehab <mchehab@...nel.org>,
 Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>,
 Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH 2/4] dt-bindings: media: Add bindings for
 raspberrypi,rp1-cfe

On 19/03/2024 08:00, Tomi Valkeinen wrote:
> On 19/03/2024 08:48, Tomi Valkeinen wrote:
>> On 19/03/2024 08:23, Krzysztof Kozlowski wrote:
>>> On 18/03/2024 16:49, Tomi Valkeinen wrote:
>>>> Add DT bindings for raspberrypi,rp1-cfe.
>>>>
>>>> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
>>>> ---
>>>>   .../bindings/media/raspberrypi,rp1-cfe.yaml        | 103 
>>>> +++++++++++++++++++++
>>>>   1 file changed, 103 insertions(+)
>>>>
>>>> diff --git 
>>>> a/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml 
>>>> b/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml
>>>> new file mode 100644
>>>> index 000000000000..7b2beeaaab0e
>>>> --- /dev/null
>>>> +++ b/Documentation/devicetree/bindings/media/raspberrypi,rp1-cfe.yaml
>>>> @@ -0,0 +1,103 @@
>>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>>> +%YAML 1.2
>>>> +---
>>>> +$id: http://devicetree.org/schemas/media/raspberrypi,rp1-cfe.yaml#
>>>
>>> Use compatible as filename.
>>
>> Ah, indeed. I changed the compatible quite late, adding the "rpi5" as 
>> versioning, and missed changing the file name.
>>
>> I'll rename.
> 
> Actually, maybe it's better to have two compatibles, 
> "raspberrypi,rp1-cfe" as the generic one, and "raspberrypi,rpi5-rp1-cfe" 
> (or something similar) for RaspberryPi 5.
> 
> And I'm not sure if the "rp1" part is relevant there, would 
> "raspberrypi,cfe" be just as fine? Naush?

See writing bindings. Compatibles should be SoC specific. In some cases
generic fallbacks make sense, in some note. But don't just choose
"generic fallback" because you want. Provide rationale.

Best regards,
Krzysztof