[{"id":3683726,"web_url":"http://patchwork.ozlabs.org/comment/3683726/","msgid":"<CAODwPW-YuhQxyGSeahp8+i-bz_hAvPQQCNWxaZCjrbvkHOQa7A@mail.gmail.com>","list_archive_url":null,"date":"2026-04-28T21:43:21","subject":"Re: [PATCH 0/7] dts: Add /firmware/#{address,size}-cells to\n Chromium-based DTs","submitter":{"id":18662,"url":"http://patchwork.ozlabs.org/api/people/18662/","name":"Julius Werner","email":"jwerner@chromium.org"},"content":"> I reviewed Depthcharge code history and found that this problematic\n> bootloader behavior dates back to at least 2014, with the Tegra/Nyan\n> device. Older devices may have similar DTB structures, but I'm not sure\n> if they have the same address-cells problems. In any case, these changes\n> shouldn't hurt even if a device was not affected.\n\nI can confirm that Nyan was the first Arm device shipping with\ndepthcharge. Note that the Exynos devices are all older and shipped\nwith an old fork of U-Boot that probably handled this very differently\n(I believe they had `/firmware/chromeos` but not `/firmware/coreboot`,\nso they wouldn't have had a `reg` node and should need no `ranges`).","headers":{"Return-Path":"\n <linux-tegra+bounces-14042-incoming=patchwork.ozlabs.org@vger.kernel.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=RtM7H2al;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=104.64.211.4; helo=sin.lore.kernel.org;\n envelope-from=linux-tegra+bounces-14042-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org\n header.b=\"RtM7H2al\"","smtp.subspace.kernel.org;\n arc=pass smtp.client-ip=209.85.128.47","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=chromium.org","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=google.com"],"Received":["from sin.lore.kernel.org (sin.lore.kernel.org [104.64.211.4])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4v7w6s3vz1yHZ\n\tfor <incoming@patchwork.ozlabs.org>; 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Tue, 28 Apr 2026\n 14:43:33 -0700 (PDT)","Precedence":"bulk","X-Mailing-List":"linux-tegra@vger.kernel.org","List-Id":"<linux-tegra.vger.kernel.org>","List-Subscribe":"<mailto:linux-tegra+subscribe@vger.kernel.org>","List-Unsubscribe":"<mailto:linux-tegra+unsubscribe@vger.kernel.org>","MIME-Version":"1.0","References":"<20260428200712.2660635-1-briannorris@chromium.org>","In-Reply-To":"<20260428200712.2660635-1-briannorris@chromium.org>","From":"Julius Werner <jwerner@chromium.org>","Date":"Tue, 28 Apr 2026 14:43:21 -0700","X-Gm-Features":"AVHnY4LgrR9BMoyPVl-dbhODH2S76f3l5WcQRNgpXekO-MzmQp39W8EwHdrUnso","Message-ID":"\n <CAODwPW-YuhQxyGSeahp8+i-bz_hAvPQQCNWxaZCjrbvkHOQa7A@mail.gmail.com>","Subject":"Re: [PATCH 0/7] dts: Add /firmware/#{address,size}-cells to\n Chromium-based DTs","To":"Brian Norris <briannorris@chromium.org>","Cc":"Rob Herring <robh@kernel.org>, Krzysztof Kozlowski <krzk+dt@kernel.org>,\n\tConor Dooley <conor+dt@kernel.org>,\n Thierry Reding <thierry.reding@kernel.org>,\n\tJonathan Hunter <jonathanh@nvidia.com>, Heiko Stuebner <heiko@sntech.de>,\n\tMatthias Brugger <matthias.bgg@gmail.com>,\n\tAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>,\n\tBjorn Andersson <andersson@kernel.org>,\n Konrad Dybcio <konradybcio@kernel.org>,\n\tdevicetree@vger.kernel.org, Doug Anderson <dianders@chromium.org>,\n\tlinux-arm-kernel@lists.infradead.org, Tzung-Bi Shih <tzungbi@kernel.org>,\n\tchrome-platform@lists.linux.dev, linux-rockchip@lists.infradead.org,\n\tJulius Werner <jwerner@chromium.org>, Alim Akhtar <alim.akhtar@samsung.com>,\n\tcros-qcom-dts-watchers@chromium.org, linux-arm-msm@vger.kernel.org,\n\tlinux-tegra@vger.kernel.org, linux-samsung-soc@vger.kernel.org,\n\tlinux-kernel@vger.kernel.org","Content-Type":"text/plain; charset=\"UTF-8\""}},{"id":3683734,"web_url":"http://patchwork.ozlabs.org/comment/3683734/","msgid":"<afExm9HeB-FMmP4P@google.com>","list_archive_url":null,"date":"2026-04-28T22:15:55","subject":"Re: [PATCH 0/7] dts: Add /firmware/#{address,size}-cells to\n Chromium-based DTs","submitter":{"id":67074,"url":"http://patchwork.ozlabs.org/api/people/67074/","name":"Brian Norris","email":"briannorris@chromium.org"},"content":"On Tue, Apr 28, 2026 at 02:43:21PM -0700, Julius Werner wrote:\n> > I reviewed Depthcharge code history and found that this problematic\n> > bootloader behavior dates back to at least 2014, with the Tegra/Nyan\n> > device. Older devices may have similar DTB structures, but I'm not sure\n> > if they have the same address-cells problems. In any case, these changes\n> > shouldn't hurt even if a device was not affected.\n> \n> I can confirm that Nyan was the first Arm device shipping with\n> depthcharge. Note that the Exynos devices are all older and shipped\n> with an old fork of U-Boot that probably handled this very differently\n> (I believe they had `/firmware/chromeos` but not `/firmware/coreboot`,\n> so they wouldn't have had a `reg` node and should need no `ranges`).\n\nOK, so that makes patch 4 unnecessary:\n\n  [PATCH 4/7] ARM: dts: samsung: Add #{address,size}-cells to Chromium-based /firmware\n\nIf I respin this, I can drop it. Or if it otherwise looks good,\npresumably folks can just skip patch 4.\n\nThanks,\nBrian","headers":{"Return-Path":"\n <linux-tegra+bounces-14043-incoming=patchwork.ozlabs.org@vger.kernel.org>","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=chromium.org header.i=@chromium.org header.a=rsa-sha256\n header.s=google header.b=d+Y0enTr;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; helo=tor.lore.kernel.org;\n envelope-from=linux-tegra+bounces-14043-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org\n header.b=\"d+Y0enTr\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=74.125.82.179","smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=chromium.org","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=chromium.org"],"Received":["from tor.lore.kernel.org (tor.lore.kernel.org [172.105.105.114])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4g4vsK3GJHz1yHv\n\tfor <incoming@patchwork.ozlabs.org>; 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