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[91.159.24.186]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-38a67d617e1sm31237711fa.9.2026.03.16.02.28.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 16 Mar 2026 02:28:35 -0700 (PDT) Message-ID: <30f3ec22-c86d-4f05-b519-641fc2632c50@linaro.org> Date: Mon, 16 Mar 2026 11:28:34 +0200 Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v10 1/7] dt-bindings: media: qcom,x1e80100-camss: Add simple-mfd compatible To: Dmitry Baryshkov Cc: Bryan O'Donoghue , Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robert Foss , Todor Tomov , Mauro Carvalho Chehab , Konrad Dybcio , Bryan O'Donoghue , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, Krzysztof Kozlowski References: <20260316-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v10-0-fdfe984fe941@linaro.org> <20260316-b4-linux-next-25-03-13-dtsi-x1e80100-camss-v10-1-fdfe984fe941@linaro.org> From: Vladimir Zapolskiy In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/16/26 04:39, Dmitry Baryshkov wrote: > On Mon, Mar 16, 2026 at 04:12:35AM +0200, Vladimir Zapolskiy wrote: >> On 3/16/26 03:02, Bryan O'Donoghue wrote: >>> Add "simple-mfd" as a second compatible string to allow child nodes >>> within the CAMSS block to probe as individual platform devices. >> >> Why are there any child nodes representing platform devices? >> >> There is no necessity of it, please use a layout similar to CAMSS CCI >> modelling. >> > > I'd say it differently. I think, putting CCI device outside of the CAMSS > node is a mistake. In the hardware all those devices are a part of the > separate block, they share the same NoC fabric, etc. > A simple-mfd model could be considered and pretty often it's usage makes great sense, but likely it's not the case here, when phys are childen of a factual CSI decoder. So far an umbrella/container device has not been considered to the best of my knowledge. OTOH I see no issue in placing phandles to the same exploited resources under multiple device tree nodes, the ultimate goal is to provide a proper hardware description. >>> >>> Signed-off-by: Bryan O'Donoghue >>> --- >>> Documentation/devicetree/bindings/media/qcom,x1e80100-camss.yaml | 8 ++++++-- >>> 1 file changed, 6 insertions(+), 2 deletions(-) >>> -- Best wishes, Vladimir