From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3D6C9E7717F for ; Thu, 12 Dec 2024 10:59:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=HaCGAh5eou4nPvUAL+r0vyJRyOIDZxMqjgPVnqYF3yY=; b=PUIGUluFnyRJQTt96RN6e61oJ1 oXjG0iUvMqu/VxUjEclefcCVHVJ1qcOQ9VfGrZ1zIsXnf/IH0BDi/m/3B10KBs6oiVt1Nij0SBjKf hXMwkkSwsmcc0qI1L1L8OxakC4uT1qVBho7Wj8vHGPzeJd4cbw6MHVKoPic33DplaBH8ZzfjFbqtP zzQTkx4J97FIFlIu80TZGNnpShyGoVxFdz7uDb0vUQUN8ka8k7CE/I89woEQcjCTMHgUCTd9piNgR VP64SVmqBlL6FlMSNPJQUCpMXCfGjLIOXZiDs59DE8Y4Kf0E85DpMolKlPGOOzK1kP4AN0Gh24Zg5 CgR+GUHg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tLguY-000000007i0-1jUn; Thu, 12 Dec 2024 10:59:14 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tLgtT-000000007SG-0sEx; Thu, 12 Dec 2024 10:58:08 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 39B7B5C62C9; Thu, 12 Dec 2024 10:57:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 63F20C4CED7; Thu, 12 Dec 2024 10:58:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1734001086; bh=66P2538eW1BwTyHrvBkaCpsiuD8uE1SJepz34ONQCVU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=Z7SkfFGRFKmALJf74ryXdLI35465PeVGRYz3KYib06+rInBoGTmgOugwNSZZdkRIZ wisUTtp53taKfhhwXCVQYhRBzbm5J/rnerCCqq9cmI7vV1BDBbOHml9qxh+OuXi13L 6oMbLkXUzSzGZ9o6epuikVzG6sKXGZ5zrM0gaR5P4CSFAF4ysMILQpNEtumvoRy71J 2zOs9xUecnEm/bX6rp3TTPBK9LX13HfTyBk81LmIkVvXCzaIZdsmWhogZVcylzoP4C kqG/OOlm3Tew2yhXaBBOC2JM3RXdjBn1vCqTKJEY4ev03Pe1w/sGwUehVuanNaW5DM sq5LkkkDNgSow== Message-ID: Date: Thu, 12 Dec 2024 11:58:00 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] dt-bindings: memory-controllers: Add mediatek common-dramc dt-bindings To: Crystal Guo , Rob Herring , Conor Dooley , Matthias Brugger , AngeloGioacchino Del Regno Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Project_Global_Chrome_Upstream_Group@mediatek.com References: <20241212090029.13692-1-crystal.guo@mediatek.com> <20241212090029.13692-3-crystal.guo@mediatek.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241212_025807_341163_E50811A6 X-CRM114-Status: GOOD ( 18.36 ) 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 12/12/2024 09:59, Crystal Guo wrote: > Add devicetree binding for mediatek common-dramc driver. > > The DRAM controller of MediaTek SoC provides an interface to > get the current data rate of DRAM. Bindings are before users. A nit, subject: drop second/last, redundant "dt-bindings". The "dt-bindings" prefix is already stating that these are bindings. See also: https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18 > > Signed-off-by: Crystal Guo > --- > .../mediatek,common-dramc.yaml | 129 ++++++++++++++++++ > 1 file changed, 129 insertions(+) > create mode 100644 Documentation/devicetree/bindings/memory-controllers/mediatek,common-dramc.yaml > > diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,common-dramc.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,common-dramc.yaml > new file mode 100644 > index 000000000000..c9e608c7f183 > --- /dev/null > +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,common-dramc.yaml > @@ -0,0 +1,129 @@ > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause > +# Copyright (c) 2024 MediaTek Inc. > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/memory-controllers/mediatek,common-dramc.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: MediaTek Common DRAMC (DRAM Controller) Common? Is this a real thing? Please describe the hardware. > + > +maintainers: > + - Crystal Guo > + > +description: | Do not need '|' unless you need to preserve formatting. > + The DRAM controller of MediaTek SoC provides an interface to > + get the current data rate of DRAM. So not common here? > + > +properties: > + compatible: > + const: mediatek,common-dramc This has to be SoC. > + > + reg: > + minItems: 9 Why this is flexible? > + items: > + - description: DRAMC_AO_CHA_BASE > + - description: DRAMC_AO_CHB_BASE > + - description: DRAMC_AO_CHC_BASE > + - description: DRAMC_AO_CHD_BASE > + - description: DRAMC_NAO_CHA_BASE > + - description: DRAMC_NAO_CHB_BASE > + - description: DRAMC_NAO_CHC_BASE > + - description: DRAMC_NAO_CHD_BASE > + - description: DDRPHY_AO_CHA_BASE > + - description: DDRPHY_AO_CHB_BASE > + - description: DDRPHY_AO_CHC_BASE > + - description: DDRPHY_AO_CHD_BASE > + - description: DDRPHY_NAO_CHA_BASE > + - description: DDRPHY_NAO_CHB_BASE > + - description: DDRPHY_NAO_CHC_BASE > + - description: DDRPHY_NAO_CHD_BASE > + - description: SLEEP_BASE Don't use some defines. Look at other bindings how they describe items. > + > + support-ch-cnt: Nope > + maxItems: 1 > + > + fmeter-version: > + maxItems: 1 > + description: > + Fmeter version for calculating dram data rate > + > + crystal-freq: > + maxItems: 1 > + description: > + Reference clock rate in MHz > + > + shu-of: > + maxItems: 1 > + > + pll-id: true > + shu-lv: true > + sdmpcw: true > + posdiv: true > + fbksel: true > + dqsopen: true > + async-ca: true > + dq-ser-mode: true This binding is terrible. Was not tested and does not follow any guidelines. Please read example schema and writing bindings document. You can also read slides from my talks... > + > +required: > + - compatible > + - reg > + - support-ch-cnt > + - fmeter-version > + - crystal-freq > + - pll-id > + - shu-lv > + - shu-of > + - sdmpcw > + - posdiv > + - fbksel > + - dqsopen > + - async-ca > + - dq-ser-mode > + > +additionalProperties: false > + > +examples: > + - | > + soc { > + #address-cells = <2>; > + #size-cells = <2>; > + > + dramc: dramc@10230000 { memory-controller@ and drop unused label. Best regards, Krzysztof