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Fri, 05 Dec 2025 08:41:45 -0800 (PST) X-Received: by 2002:a05:6000:310e:b0:429:d6fa:da32 with SMTP id ffacd0b85a97d-42f731d1ab7mr11348971f8f.59.1764952904652; Fri, 05 Dec 2025 08:41:44 -0800 (PST) Received: from [10.67.48.245] ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42f7d331e62sm10059554f8f.35.2025.12.05.08.41.40 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 05 Dec 2025 08:41:43 -0800 (PST) Message-ID: <7f051318-0aaf-454d-8a85-b6d16fa10d2b@broadcom.com> Date: Fri, 5 Dec 2025 08:41:38 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH] arm64: broadcom: bcm2712: Rework rp1 overlay handling To: Krzysztof Kozlowski Cc: "Rob Herring (Arm)" , Krzysztof Kozlowski , Phil Elwell , Broadcom internal kernel review list , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Conor Dooley , linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Andrea della Porta References: <20251117211503.728354-2-robh@kernel.org> Content-Language: en-US, fr-FR From: Florian Fainelli Autocrypt: addr=florian.fainelli@broadcom.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-DetectorID-Processed: b00c1d49-9d2e-4205-b15f-d015386d3d5e X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251205_084148_742763_2266AA22 X-CRM114-Status: GOOD ( 13.33 ) X-BeenThere: linux-arm-kernel@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-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 12/5/25 00:08, Krzysztof Kozlowski wrote: > On 17/11/2025 22:15, Rob Herring (Arm) wrote: >> It's a requirement that DT overlays be applied at build time in order to >> validate them as overlays are not validated on their own. >> >> Simply adding a build time target is possible, but it's also not desirable >> to have targets which include the overlay contents and apply the same >> overlay. >> >> Rework the targets such that there are 2 overlays: the existing RP1 overlay >> and the board specific configuration of the RP1 (bcm2712-rpi-5-b.dtso). >> >> Signed-off-by: Rob Herring (Arm) >> --- >> The missing applying of rp1.dtbo will soon be a warning[1]. >> >> The comment in bcm2712-rpi-5-b.dts(o) needs updating or removing. The RP1 >> driver or userspace handling of the overlay probably needs updating to >> handle the 2 overlays. IIRC, I think we can apply overlays to overlays >> which may be useful here. If not, adding that to the tools should be >> possible. >> >> [1] https://lore.kernel.org/all/20251114222759.4181152-1-robh@kernel.org/ >> --- >> arch/arm64/boot/dts/broadcom/Makefile | 10 ++++++++-- >> ...m2712-d-rpi-5-b.dts => bcm2712-d-rpi-5-b-base.dts} | 2 +- >> .../{bcm2712-rpi-5-b.dts => bcm2712-rpi-5-b.dtso} | 11 +++++------ > > > So now Linus' tree has warnings. Can this be applied by anyone around > Broadcom and sent as fixes? It's an RFC and I was hoping to get Andrea to comment on this patch before applying. -- Florian