From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 76A673E3D9F; Thu, 23 Apr 2026 09:44:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776937488; cv=none; b=ILAIgPxmnS9idv6WlXlfmMZ9LIzujV49uhCC5a8820wtYZroFVp0FUy0WK6+o78TAQ2zQA/OAGvP5df2lDWt2/7doO+aVoS0J4BDgXWWimsTjP3mIlgWU+AaezuJrYccEToESvO0H10kntsWrckLhPTcSVjtM5W26jrJN0DdXSQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776937488; c=relaxed/simple; bh=UV9jQ9XvPw0/PwdWna/NVSWez2dG6UsrgOwaXbivd94=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=tP1qx8byWe2X2qj2+Ar2oFdQvshil2a1XhVVydCx2C9sLlVo+Pgx1bdoJo6kr3RAOrUjCYDWM+MjtRddo9oT6qDgxuABbB7YHAk4t40ZCEPettR+HQjLO8FnzCCmQmOGJ70c5QYoLOKuwXkX9Sc8ULHDRg8WdjiasKj2PYWMZNg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=b8fqnLTl; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="b8fqnLTl" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 50C79C2BCAF; Thu, 23 Apr 2026 09:44:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776937488; bh=UV9jQ9XvPw0/PwdWna/NVSWez2dG6UsrgOwaXbivd94=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=b8fqnLTle6qiUny9GLiB66mYAvo5pBUfGKBD9j/SahanJ30PqBLowxW5CMXWn6bcB /9KKEDA4+3JjPVlO8reAQWz3gbHKJHh6CjB0/r0QC1XDIRFmwXmNjdzG5kNEXNX4i7 ZreC1J8OXDRgUYm2lq6drbBN35SKwmpclgU8Lj30YaGYBidek7X8ob6HkWEHe90Im1 SerDAq+lK3VQnHz9bka8lfRCLgXkZqiZ13bXwAKg2i7/a4khm2umdT52rkMkCQfZlM PAqGOSCIsL90EjYGlCqI3uxbscyr3PsSgAvwt86DBFzgHFg+U0nL2MiJ6ID7r0lSxm wNVlQgxv8w7kw== Message-ID: Date: Thu, 23 Apr 2026 11:44:41 +0200 Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 0/9] riscv: spacemit: enable SD card support with UHS modes for OrangePi RV2 To: Iker Pedrosa , Troy Mitchell Cc: Ulf Hansson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Adrian Hunter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Michael Opdenacker , Javier Martinez Canillas , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, linux-kernel@vger.kernel.org, Anand Moon , Trevor Gamblin , Vincent Legoll References: <20260413-orangepi-sd-card-uhs-v8-0-c21c40ec16d0@gmail.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 8bit On 16/04/2026 10:18, Iker Pedrosa wrote: > El mar, 14 abr 2026 a las 10:16, Troy Mitchell > () escribió: >> >> On Tue Apr 14, 2026 at 3:12 PM CST, Iker Pedrosa wrote: >>> El lun, 13 abr 2026 a las 10:07, Krzysztof Kozlowski >>> () escribió: >>>> >>>> On 13/04/2026 10:02, Iker Pedrosa wrote: >>>>> This series enables complete SD card support for the Spacemit K1-based >>>>> OrangePi RV2 board, including UHS (Ultra High Speed) modes for >>>>> high-performance SD card operation. >>>>> >>>>> Background >>>>> >>>>> The Spacemit K1 SoC includes an SDHCI controller capable of supporting >>>>> SD cards up to UHS-I speeds (SDR104 at 208MHz). However, mainline >>>>> currently lacks basic SD controller configuration, SDHCI driver >>>>> enhancements for voltage switching and tuning, and power management >>>>> infrastructure. >>>>> >>>>> Implementation >>>>> >>>>> The series enables SD card support through coordinated layers: >>>>> >>>>> - Hardware infrastructure (patches 1-2): Device tree bindings for voltage >>>>> switching hardware and essential clock infrastructure. >>>>> - SDHCI driver enhancements (patches 3-7): Regulator framework >>>>> integration, pinctrl state switching for voltage domains, AIB register >>>>> programming, and comprehensive SDR tuning support for reliable UHS >>>>> operation. >>>>> - SoC and board integration (patches 8-10): Complete K1 SoC controller >>>>> definitions, PMIC power infrastructure, and OrangePi RV2 board enablement >>>>> with full UHS support. >>>>> >>>>> This transforms the OrangePi RV2 from having no SD card support to full >>>>> UHS-I capability, enabling high-performance storage up to 208MHz. >>>>> >>>>> Tested-by: Michael Opdenacker >>>>> Signed-off-by: Iker Pedrosa >>>>> --- >>>>> Changes in v8: >>>>> - Resending the series as v8. The v7 submission failed due to an SMTP >>>>> error during transit, which resulted in a broken thread on the mailing >>>>> list. >>>> >>>> Hm? Everything is here: >>>> https://lore.kernel.org/all/20260413-orangepi-sd-card-uhs-v7-1-16650f49c022@gmail.com/ >>>> >>>> You can send individual patches to fix up threading, use --in-reply-to. >>> >>> My apologies for the noise and the rapid resend. >>> >>> The reason for v8 was that the v7 cover letter (0/9) failed to reach >>> the mailing list due to an SMTP error on my end. This left the v7 >>> thread "headless" in the archives without the changelog or the full >>> context of the series. I was attempting to fix the threading >>> immediately so that reviewers would have a complete set of patches to >>> look at, but I realize now that resending the entire series on the >>> same day was premature. >> So that's why Krzysztof said you should send individual patch with --in-reply-to. > > I see, thanks for the clarification. Just to clarify for my future > workflow: is it acceptable for a series to be 'headless' (starting > with Patch 1) if the cover letter is lost, or is the cover letter > (Patch 0) strictly required as the thread root? > > In such cases, would it be better to just send the missing cover > letter as a reply to Patch 1 afterward to complete the thread without > resending the whole series? Replacing missed cover letter is tricky. If you patches have in-reply-to with ID to a missing posting, but you could do that with a bit mangling - you would need to send the cover letter with that exactly MessageID. If patches do not have in-reply-too, then you can send cover letter as reply to patch #1. Best regards, Krzysztof