From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793604443; b=WiDJUUJnmuzbSu2teryzD/KIaMX3vE+D/xFp9WaTrC8qdUcDR81vk8yCEX9OHClUGrNp v0kvYklXCm0kQInx/EbODPPQF0e4OYqANaA3fWXa4hUVjkhs9lk2DfEQl6XtLeV/3DVb7 5zQAJhITkBMyQICehhgFII8PgVVg62koE285sfEdqSKQD3g1E4cW/ahsbmaGtDSE3iHzh 1vgpPQ13QPH8xIaSPWb6cZG28MqHjpCkEs4pUsFCYyRFBRxt2Q/r0rSYtaXl8Bc1XMz4c RQnDcNCVREqvH6mA4X9vnfyir25NepInpVEPKvQkB1hRt5LVYfNw9ebtZw6O9kqtpUw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793604443; h=Received:DKIM-Signature:Date:From:To:Cc:Subject:Message-ID: References:MIME-Version:Content-Type:Content-Disposition:In-Reply-To; bh=U5d/OqMUU7ujcPTUgqYcdum+/mhJbuAtN1Av5v/OUNY=; b=Vc1VRZKTaRrZgHcEKCqekRXc6W12E3YpggKMVOlVlywuONjwZtFl8O4pzopdDOUulHwk C6e4/ob48r1BOQUaRtm5XffLhgLQ+MKCNPoDteQN21b7TeImgSxFbQat4AqBttD6WQGsV KI2eH7CWo/7VrUF58Xsv/5bbU7fsU/QBEdJjY8bFCKw37+B393s5eOr7vQvkvS6ZAie9p xtu2bZ+It10LI771bI0lg3IBI00BSB2bMBdKCAx76ANcbINipGIxdttfB3b7QAMEUEJJf GbKA6be2LWq7hwsG8EuK7j/5BPYk+ekaHpC5NhLxgx3SwQRcTaFmHt0zBO3xfkylC+w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HlL86neP; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 50D4F606A324; Mon, 2 Nov 2026 07:27:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=HlL86neP 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-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20261031020640-263f7b05-a7s-mmc-binding@gmail.com> 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