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=1794742518; b=GBU0n0kZZwaeyr9RI33YqmoRhVUP9dsY62h5RzJ8IfKdTtEgTkf+V3y5ZDYpX++RNmnb GEm8h3l8pmqc5ByLQzJTOOKLw4BtFJKsHtLDydtNvixEt6rKPXeRO5YQigg6YVBb8r3M0 eqptb6++E15iTTnNVa05qdRkItuqH30vgKYVnRqKyo5RG1eLuvW1H3rtFedp+ipuJgA4R wFM/QYTX29P0DAGYUwUsNw/qNehOQp7ilQRz46GWeVKaV/6sDiQJRlXdeXIBV9W1tVqCP QcvxPTw1rpP1cNXWqb1nQ6lqjPhXfCKGQkDHHoXxs01MCLG4s1vx099hwhdmQUALg+w== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794742518; h=Received:DKIM-Signature:From:To:Cc:In-Reply-To:References:Subject: Message-Id:Date:MIME-Version:Content-Type:Content-Transfer-Encoding: X-Mailer; bh=UkLWAV1hSmkKAmuwwqothfPZt11tAhXLerlu5PLiFXI=; b=ZsQOtnkZ9dOzh0qp0eFFV3NXnO4PQEn/7/eSZoqV2WtTkN2on+islYAl5iezSl+KN9kF hTUiWIUwKd7378j2UUZRxEJa6MbwZLZZ7AscrutfZYbjD08aUdJsp3CjPrVFTfAyUJkEE TVrWuVIBYU5A4JgAtpKGzIF/Eb31ytDbPpOMsMW7IVvJd/nvS//fXmfazZIpf/r0Ors0p 97XQTKg/oGbhXdTxIzAAgXQ5FUZ9yDBx7sU3gxhFuOTojbuItdHp0h/ZbPJxShiPAjUWY DvA+fCu6D9IfuU5fCoxzGrLB1M5sp2lcmvcmlCqYfLwp2s7JIZYo+P2KV2sA4JLDq2Q== 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=h7WEGIfH; 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 A1D12606A337; Sun, 15 Nov 2026 11:35:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=h7WEGIfH Received: by smtp.kernel.org (Postfix) with ESMTPSA id B89651F000C5; Sun, 15 Nov 2026 11:35:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1794742518; bh=UkLWAV1hSmkKAmuwwqothfPZt11tAhXLerlu5PLiFXI=; h=From:To:Cc:In-Reply-To:References:Subject:Date; b=h7WEGIfH8FvaqWXLN0d7OMtr/gQbGsGk9acfLe13ANtU20xLLJK1gxR+UiCXMsdyr ErPTlvjSFCTKpyfVT5Fp+afuCFOMJQzhED8RQQf6V/HOlcTDpihhz03CZYc4n8zLL+ 7i4UyA7jqiDtbVybiKkXjgdWsUmfM0w/fPFRzxCAJpCgEHB4NBjLOFaH+FoClGyoK6 x87ZvIsEd1c7LQCraA1DFLAV/OWgIZhfMcVM6/7O2F2mFKfhTFYKYXAJHfrTFISUAW ku9q4aIK2ufEJr3zJGj5kS4rIpYA4LCAgYc3vajsCWUX300tkx5Nw+tgdy0D9hT+4/ qRUTvOGSO8IgQ== From: Chen-Yu Tsai To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Samuel Holland , Jernej Skrabec Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-sunxi@lists.linux.dev, linux-kernel@vger.kernel.org In-Reply-To: <20261104185148.883318-1-jernej.skrabec@gmail.com> References: <20261104185148.883318-1-jernej.skrabec@gmail.com> Subject: Re: [PATCH] ARM: dts: sun8i: r40: bananapi-m2-ultra: Limit eMMC clock to 37.5 MHz Message-Id: <179474251652.3095306.12076464290738502589.b4-ty@kernel.org> Date: Sun, 15 Nov 2026 19:35:16 +0800 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-Transfer-Encoding: 7bit X-Mailer: b4 0.14.2 On Wed, 04 Nov 2026 19:51:48 +0100, Jernej Skrabec wrote: > The Samsung eMMC on Banana Pi M2 Ultra fails with "data error, sending > stop command" within a second of sustained reads in DDR52 mode at > 50 MHz. At 37.5 MHz the same board survives a long read/write soak. > > Limit the eMMC clock to 37.5 MHz. Also enable the hardware reset line, > which is routed to the controller (PC24), so the card can be recovered > after such errors. > > [...] Applied to sunxi/dt-for-7.5 in sunxi, thanks! [1/1] ARM: dts: sun8i: r40: bananapi-m2-ultra: Limit eMMC clock to 37.5 MHz https://git.kernel.org/sunxi/linux/c/160738a3721c Best regards, -- Chen-Yu Tsai