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[188.141.32.125]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-486f443b77esm4890005e9.15.2026.03.17.10.29.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Mar 2026 10:29:09 -0700 (PDT) Message-ID: <85fc368a-c765-487e-bd9a-c5dd0376fca8@linaro.org> Date: Tue, 17 Mar 2026 17:29:20 +0000 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: Krzysztof Kozlowski , Bryan O'Donoghue Cc: Bjorn Andersson , Michael Turquette , Stephen Boyd , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Robert Foss , Todor Tomov , Mauro Carvalho Chehab , Konrad Dybcio , Vladimir Zapolskiy , 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 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> <20260316-glaring-jaybird-from-wonderland-4f8fd6@quoll> <94f4fda4-504e-44eb-87f0-e34e557402f8@linaro.org> <471895f6-dc60-44d8-84ce-8ba0069110e4@kernel.org> <1671b8ce-cbf9-45ae-947b-f35d174be93e@kernel.org> <61fa4409-e19c-49d9-b7fa-dc6f8413c181@kernel.org> <2eef8129-8cec-4ef3-9bb1-22e78b004905@kernel.org> Content-Language: en-US From: Bryan O'Donoghue In-Reply-To: <2eef8129-8cec-4ef3-9bb1-22e78b004905@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 17/03/2026 16:29, Krzysztof Kozlowski wrote: >> To my mind that fits the criteria you've set of !depends on parent. > OK, understood, although I have doubts though, because you have also > interconnects and iommus only in the parent. > > Regardless of that, even if this fits simple-mfd there is simply no > benefits of doing that way and your driver should just populate children. Right so this is a precursor to what I'd like to do with ICP/BPS and IPE which will define iommus within themselves. Not quite ready for RFC yet but: https://github.com/0xB0D/linux/blob/qcom-laptops-v6.18-rc4-camss-icp-bps-ipe-icp-boots%2Bstats/arch/arm64/boot/dts/qcom/hamoa.dtsi#L5676 Then again if I'm understanding you here, you aren't opposed to sub-nodes its the simple-mfd you're skeptical about. There's nothing stopping us doing platform_register_device() from inside of camss to launch these devices .. --- bod