From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 22845606A32E for ; Mon, 2 Nov 2026 07:27:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=RjOpVdOi; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HlL86neP 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:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Unsubscribe-Post:List-Owner; bh=U5d/OqMUU7ujcPTUgqYcdum+/mhJbuAtN1Av5v/OUNY=; b=RjOpVdOiQWWVgpWD8yg1Zkh9qE n8e0sQXqg3DdC66dzxfrFd9k6eR1Lgyn0vHeDVwAEn6doYoZwPmQsPkNUL08HqKadHP9pYv/vD7lt 6881yW1eQMzRkhfxE+HR6UMUSCv4Vgx98KabZHtd5uhi98SproL9qHqBaGJvZ2wMdPEqmgodXi1ai uRMtzpfWUw+Ji1NvZ5E9brm77P8gos92IXG74dTePAO0LQeedfDWJaRqbGLRq42Tk+4fPuSWUcyH2 ZbzZfw07NZhtRA7h+Wn07er0o30EmygQs3MWNDtf71WOqTxuA6nnTMRrxdzOHSzvoBg6H52q7q/YE 4h15+fqw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNmRw-0000000Fk6r-44DA; Mon, 02 Nov 2026 07:27:24 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.100.1 #2 (Red Hat Linux)) id 1xNmRv-0000000Fk6e-2jy8 for linux-arm-kernel@lists.infradead.org; Mon, 02 Nov 2026 07:27:23 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 0A6F740030; Mon, 2 Nov 2026 07:27:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7F071F00919; Mon, 2 Nov 2026 07:27:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793604442; bh=U5d/OqMUU7ujcPTUgqYcdum+/mhJbuAtN1Av5v/OUNY=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=HlL86nePf0jHe0zn+0px/ON2Il/o4udZUPkHGO25OEZqJ+AfJbmbfod1gfQ1ukRy+ hhh1hGgLcItTPW9hDMDnSEK6wOPDbNP8WWIEskTgv526Mf08EyZSyEi/Y2TPYd60r6 ODZuIm2chaI6wklBuNtoPxowEDmK6PVTxvSrFu+yyhLNO68bKRMz7Xg+bF9X6CqhlA P3DjlU/QISuzW5yUtzvQY7ALU+GS60s4MpTGPg7vQeBPB66brcPcPNiT2CwniHNB5+ Mn48Tj6lbJKJkAjl9MXi86BljI+u0VRou5/1RWNBg4R+wS9RW3rg2NOMOGBUVi5Cmv zQrpHLzFCbmVg== Date: Mon, 2 Nov 2026 08:27:19 +0100 From: Krzysztof Kozlowski To: Enzo Adriano Cc: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Chen-Yu Tsai , Jernej Skrabec , Samuel Holland , Maxime Ripard , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org, Andre Przywara , Junhui Liu Subject: Re: [PATCH] dt-bindings: mmc: describe the Allwinner A733 eMMC controller Message-ID: <20261102-steady-grateful-chimera-e2363a@quoll> References: <20261031020640-263f7b05-a7s-mmc-binding@gmail.com> X-Archived-By: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261031020640-263f7b05-a7s-mmc-binding@gmail.com> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" X-Spam-Status: No, score=-10.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=4.0.1 X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On Fri, Oct 30, 2026 at 10:26:47PM -0400, Enzo Adriano wrote: > SMHC3 uses a different DMA descriptor format from SMHC0/2: the length > field is 12 bits and the ownership/control word carries different > control and high-address fields. An older A100/D1 fallback would claim > unsupported programming compatibility with the existing sunxi-mmc > descriptor builder. > > Give SMHC3 a distinct compatible and describe its register range, > interrupt, bus/module/storage-MBUS/MSI-Lite1 clocks and bus reset. This > binding permits an accurate disabled hardware description; no > operational driver match or eMMC functionality is claimed here. > > AI assistance: Codex:gpt-6-astra. Drop, we do not advertise slop companies anymore. > > Assisted-by: LLM Drop > Signed-off-by: Enzo Adriano > --- > This binding is a separate prerequisite for the disabled MMC3 node in How this can be a separate prerequisite? Binding without user is not a prerequisite. > the A733 DT v2. It does not add a sunxi-mmc driver match or claim an > operational eMMC path. Hm? Why? > > The original A733 manual and public vendor implementation distinguish > SMHC3's descriptor control/high-address fields and 12-bit buffer > length from SMHC0-2. Its resources are the 0x04023000/0x1000 register > window, SPI 164, AHB/module/storage-MBUS/MSI-Lite1 clocks and AHB reset. > The generic A733/D1 MMC0-2 compatible already in the base is unchanged. > > The example uses the public A733 CCU header IDs. The tested standalone > base is official commit d89e1d186ec9271bf78e62771779e9fc03bf0fc3 plus > the clock helpers and CCU v6: > https://lore.kernel.org/r/20260906-sunxi-clk-no-p-v1-0-cbde21c9fe69@pigmoral.tech > https://lore.kernel.org/r/20261009-a733-clk-v6-0-ae8178fce7e8@pigmoral.tech ... > > base-commit: d89e1d186ec9271bf78e62771779e9fc03bf0fc3 > prerequisite-patch-id: 0df2ae41836b86fd868dfa01ddfde57f888f761a > prerequisite-patch-id: 88f3a431e7c551a9fa732f062188f10fdd362eeb > prerequisite-patch-id: 3e88bc873c909059d1199f82cda4013765e7a5e5 > prerequisite-patch-id: 0dbc27cd7417352319a0705a051dff35085e8922 > prerequisite-patch-id: 0ed6b92774b5b794761c7ce34db653a5435dc833 > prerequisite-patch-id: 27ed3814dbd0c7ad830532ff125625917c873b4b > prerequisite-patch-id: 74d03898c5ce14763f4e89fb73e021de59f0fb9f > prerequisite-patch-id: 9225cb094cf6cbb338b14ac63711d68bed12d24d > prerequisite-patch-id: 568dae1c91a0d7318d6eb14a18054343b84b603a > prerequisite-patch-id: ff3806332e741f0e2c8dac1c11f4c71449c16c8c > prerequisite-patch-id: 39461e0543aefb5c40184664625cbab19ac8408a > prerequisite-patch-id: 6fc03bfbd343042dd3b660938fcc09c5e7d48314 So this cannot really be tested. Best regards, Krzysztof