From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-wm2-f13.google.com (mail-wm2-f13.google.com [74.125.225.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id CFF8C33ADAC for ; Sat, 3 Oct 2026 08:11:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.225.141 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791015068; cv=none; b=secKMQt1wcQ1ONAaw34MzJ/CY6YQedAdCxWuVw/nqQt07xHGnQbjPZDybhxoGj6GLo05E9PjCVs92Xcjq34ma5AWWIAWHoteSb7VX3jPY37eahltafUV5AayHEJECUs2Qk++TUfPJ2Ukovug/30XbGNgpn87zJ3eLNBfFpM9egQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791015068; c=relaxed/simple; bh=wtwQ6JzEMapAlW6zEvQWmul06EKyW5l8OOrIKIXFqHg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=D7bP4w8wtz0W7xvwvacTQFQllqvggrkbVXr8GUOWBiJtWB78v1s1FGg4Gc61ZnItv6ghsN5shh66Tt+ZDziBfH4A7VgECVE2JOPIHoIhmeht3+pS5wvuKzC61beyFY4gW1z0kUZst+/MHwfGq3zIPEi2qfReNHWmc6EU+xQl3Dw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.com; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=74.125.225.141 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-wm2-f13.google.com with SMTP id 5b1f17b1804b1-49b912d8239so4083285e9.0 for ; Sat, 03 Oct 2026 01:11:06 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1791015065; x=1791619865; h=content-transfer-encoding:content-type:in-reply-to:from :content-language:references:cc:to:subject:user-agent:mime-version :date:message-id:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=8UOj4UBtpSDtB1u/mynjbblWtbQNRWQi1yFF6YRu1C8=; b=EiX5il+tQZtFJAGCxIk62l+o/HpY1msKwTUrjXxGSDJsu8eL9wLjIeO9kKoxWBmlG9 dp5Rgu1RL79TbmZw44o0kDbzHbMELwuQfwlPpcRTAO1+oh2azDIhzbxLF/O4KXfkQgtu qDPAkt/bsnKVcyVUhHgYM/xWi9qNuzgxlj2yY3TUM/AzMH1aTIY5FhJ6YJm4F0jgwBjX jg8rDOuTPVMkbN7jlrppsczSAEL3EzkYtylIdyYySi4MjWckFUj7IOXI8zYmKm77WaDf 5n4ZP2V1Wudr5AXryzVykvpdm6AO1263Xsuxmb8X4YjjhtpylxQCorcmhr9XLehPPfua ZjMw== X-Forwarded-Encrypted: i=1; AKwUvBzaTDLopFQ4M35MU/HDfXrScSRJVoyaNTUidtG5hHt0l63r3xBJ+W9yYbz6GrBGiLJPpZIeH8a8MKsErC0=@vger.kernel.org X-Gm-Message-State: AFuF++mYBE0ukIln3voqIKCWIW7tliGhF/VLmfEDv8nsjbnjEUIRCQ7S sLOZ8mzB7Rg1MG2V/xthSYTzF/stE+Pwceg8E/hmGEUAOCt21DP/no8z X-Gm-Gg: AYBFou1Z1xRVmEGftKvgkMEpvm/8gXWuARxF1QHsYS0pfFIL90/rIOhzJX/h+XgDXkd IIwrxx8GFjFtIDbLeIF0JJka4PEj5s1CXSZc3T+cNZjmWD932irvnMv+Hw2eX8zzsZKhsTTwpN3 Yz8utjjndOSAD/sOGM8qeFuF/u+qbUe3tXwr9iMOBmK3zoo77BH3KgC4izZcmIzI5XzDKg4uc4d 6z9ZZpQdL1wUOr3dFHlSdq9OjymiOo5VWYopJ0vDQlOFZgr7gX0wdapWobn7hG7zbcxQOOXc94b oLCByqDZdCTwwzxhmGqFm7XmfttVtejDPOZWvHeHZPbADdzrAq+pWZJoKuqdYC3Bjkr5dkTa+qU rskLq9wv1CqKpfuzDA8gnK/RmtyKGmzIsYezv3BypgjIZUdzEEO8hCInZcLR1kLvQ1B2x6mZE8y oJ1VVVb6C3dubHdKerM1pmiL2epuHrPdF5TlIrT1Sn6FdEWyDJYVmWHhx3aFB47NNRQ0fFbstj2 fUU0SJXsm4V+D08mrh+BUK9n31R X-Received: by 2002:a05:600c:a011:b0:49d:4ef:bf70 with SMTP id 5b1f17b1804b1-4a02756716amr80264645e9.10.1791015064857; Sat, 03 Oct 2026 01:11:04 -0700 (PDT) Received: from [192.168.1.135] ([84.68.183.72]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48b82253e7esm10140636f8f.0.2026.10.03.01.11.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 03 Oct 2026 01:11:04 -0700 (PDT) Message-ID: Date: Sat, 3 Oct 2026 09:11:03 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 1/4] dt-bindings: mmc: amlogic,meson-gx-mmc: document the T7 pipeline clock To: Rob Herring Cc: Ulf Hansson , Krzysztof Kozlowski , Conor Dooley , Neil Armstrong , Jerome Brunet , Kevin Hilman , Martin Blumenstingl , Stephen Boyd , Brian Masney , Chuan Liu , Jian Hu , Ronald Claveau , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-amlogic@lists.infradead.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260905153234.133217-1-tanure@linux.com> <20260905153234.133217-2-tanure@linux.com> <20260916203701.GA1463751-robh@kernel.org> Content-Language: en-US From: Lucas Tanure In-Reply-To: <20260916203701.GA1463751-robh@kernel.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 16/09/2026 21:37, Rob Herring wrote: > On Sat, Sep 05, 2026 at 04:32:31PM +0100, Lucas Tanure wrote: >> The SD/eMMC controllers of the T7 SoC are physically far from the >> NIC_MATRIX bus fabric, so the hardware design inserts a pipeline stage >> in the middle of the bus path to help timing closure. This stage is fed >> by its own gate clock and, when that clock is disabled, a controller >> that starts a DMA transfer can never complete it. >> >> Allow a fourth clock entry, named "pipeline", and require it for the >> amlogic,t7-mmc compatible. The other controllers of this family keep >> the existing three clocks. > > Did the SD controller not work without this clock? If it did, then this > is an ABI break which is evident by the current warning in linux-next. > > Rob Yes, the SD controller doesn't work with this clock, so I don't think is a ABI break, as the current code doesn't work and the board crashes a lot. And a few patches got merged from my work, so I will resubmit a new series for this. Thanks Lucas