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Tue, 21 May 2024 01:22:45 -0700 (PDT) Received: from [192.168.1.20] ([178.197.206.169]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-420111f2decsm369090595e9.22.2024.05.21.01.22.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 May 2024 01:22:44 -0700 (PDT) Message-ID: <75b78eaf-9b13-477c-bf02-4e9837a25dd4@linaro.org> Date: Tue, 21 May 2024 10:22:42 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/4] arm64: dts: mediatek: mt8365: use a specific SCPSYS compatible To: Alexandre Mergnat , AngeloGioacchino Del Regno , Lee Jones , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Matthias Brugger , MandyJH Liu , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org References: <20240518211159.142920-1-krzysztof.kozlowski@linaro.org> <20240518211159.142920-2-krzysztof.kozlowski@linaro.org> <2cc638ca-0add-4c8c-b844-606e22dbd253@linaro.org> <51a47736-ffe8-49e2-b798-d409ca587501@baylibre.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@linaro.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240521_012257_003125_00E950F8 X-CRM114-Status: GOOD ( 20.16 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org On 20/05/2024 17:23, Alexandre Mergnat wrote: > Hello Krzysztof, > > On 20/05/2024 12:12, AngeloGioacchino Del Regno wrote: >> Il 20/05/24 12:03, Krzysztof Kozlowski ha scritto: >>> On 20/05/2024 11:55, AngeloGioacchino Del Regno wrote: >>>> Il 18/05/24 23:11, Krzysztof Kozlowski ha scritto: >>>>> SoCs should use dedicated compatibles for each of their syscon nodes to >>>>> precisely describe the block.  Using an incorrect compatible does not >>>>> allow to properly match/validate children of the syscon device.  Replace >>>>> SYSCFG compatible, which does not have children, with a new dedicated >>>>> one for SCPSYS block. >>>>> >>>>> Signed-off-by: Krzysztof Kozlowski >>>> >>>> Technically, that's not a SCPSYS block, but called SYSCFG in MT8365, but the >>>> meaning and the functioning is the same, so it's fine for me. >>> >>> So there are two syscfg blocks? With exactly the same set of registers >>> or different? >>> >> >> I'm not sure about that, I don't have the MT8365 datasheet... >> >> Adding Alexandre to the loop - I think he can clarify as he should have the >> required documentation. > > Unfortunately, The SCPSYS (@10006000) isn't documented, but according to the functionnal > specification, it seems to have only one block. > > I don't have the history why SYSCFG instead of SCPSYS. > > I've tested your serie and have a regression at the kernel boot time: > [ 7.738117] mtk-power-controller 10006000.syscon:power-controller: Failed to create device link > (0x180) with 14000000.syscon > > It's related to your patch 3/4. I don't see how this could be related. The error is mentioning entirely different node - mmsys. No driver binds to 10006000.syscon, except the MFD syscon of course, so my change should have zero effect on drivers. The mtk-pm-domains (so child of patch affected in 3/4) only takes regmap from the parent, so the cells again are not related. Just to be sure: you are testing mainline or next, without any other patches on top except mine? > Best regards, Krzysztof