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Wed, 20 Mar 2024 02:12:08 -0700 (PDT) Received: from [192.168.1.20] ([178.197.222.97]) by smtp.gmail.com with ESMTPSA id n6-20020a509346000000b0056b924663ecsm1914876eda.59.2024.03.20.02.12.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 20 Mar 2024 02:12:07 -0700 (PDT) Message-ID: <38aaf71a-511d-4e63-9014-07f591d8250b@linaro.org> Date: Wed, 20 Mar 2024 10:12:05 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] dt-bindings: media: Add bindings for raspberrypi,rp1-cfe To: Naushir Patuck , Tomi Valkeinen Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Laurent Pinchart , Sakari Ailus , Jacopo Mondi , Kieran Bingham , Mauro Carvalho Chehab , Raspberry Pi Kernel Maintenance , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Florian Fainelli , Broadcom internal kernel review list References: <20240318-rp1-cfe-v1-0-ac6d960ff22d@ideasonboard.com> <20240318-rp1-cfe-v1-2-ac6d960ff22d@ideasonboard.com> <30430e0e-70de-4831-97ad-974e350a2e54@ideasonboard.com> <5ca1d005-1beb-47ec-943a-9358ae3c6704@linaro.org> <89d459dd-cc8c-4780-a56a-809e24343e69@linaro.org> <9d238cd6-0e11-4775-bc00-7df50f0a6638@linaro.org> <0401eb0f-0172-4371-9a16-f51b6b885b55@ideasonboard.com> Content-Language: en-US From: Krzysztof Kozlowski Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 20/03/2024 09:50, Naushir Patuck wrote: >>>> >>>> Also, I'm still wondering about the RP1 part there in the compatible >>>> string. Is it necessary? The CFE is located in the RP1 co-processor, but >>>> is that relevant? >>>> >>>> Is there a versioning for the whole RP1 chip? Maybe it's going to the >>>> wrong direction if we use the board/SoC for this compatible name, as >>>> it's actually the RP1 where the CFE is located in, not the SoC. >>>> >>> >>> I don't really know the conversion required to answer this one. >>> Logically CFE is on RP1, so it makes sense to me to have "rp1" in the >>> string, but I will follow the judgment of the maintainers. >> >> Well, my thinking here was that if we have a register from which to read >> the version, and Raspberry Pi would create a new co-processor, RP2, with >> the same CFE. Would we then have "raspberrypi,rp1-cfe" and >> "raspberrypi,rp2-cfe", even if there are no changes? That would follow guidelines as expressed in writing bindings. >>Or would a plain >> "raspberrypi,cfe" do for both? >> >> In other words, if we don't need the "rp1" for versioning purposes, >> should it then be dropped? > > I agree with the above, you've convinced me that "raspberrypi,cfe" > might be the more appropriate string, or a convincing argument for > that to be a fallback string. Just follow the guidelines. If you come up with generic compatible alone, you could run to the same problems everyone is running. Best regards, Krzysztof _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel