From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f170.google.com (mail-pf1-f170.google.com [209.85.210.170]) (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 4D83B37206F for ; Wed, 9 Sep 2026 17:27:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.170 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788974823; cv=none; b=mnKgxJD1rw26KNeANDYFN90uEqCl+VUSMfe6bjC+gqYLKpAwiHTP8Pe9bdUIo5Z6aIMKj8Gb65hzneSQ3/+vZxiejNTEPPLqJNFRP7J1tFru9H+WsgMEMfL1OwnViqwNcdLfnAb4CFx9tIXBaEfjP4SE3KJvyrdbFz7qgbj47eY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788974823; c=relaxed/simple; bh=SUxP5gT1ZaOy4mmgP6chw0Cr8VRY83cgnbGtN/GeIrM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Juba0PEXZLUnv5bkxUONe2kx0MkAELpdJM4IJ6oA4Ev5GeJdzMl39vhC5tJ7Qktne4uw8wdBnNE+rZObQrIfWrZFZW+kMl9M27PAV8HW66VIDTA4EGjuCpuEssc4D2Wb+anS8tHuazrpTkfGsKMWUSd+azwpmLFh2ynnACbgodo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=jI6Ly9NO; arc=none smtp.client-ip=209.85.210.170 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="jI6Ly9NO" Received: by mail-pf1-f170.google.com with SMTP id d2e1a72fcca58-86265451beeso3290145b3a.0 for ; Wed, 09 Sep 2026 10:27:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1788974821; x=1789579621; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=BxkJmMQiuFGLIVhYvP7iekSRoJyyqxrT2LFSLJP0a4Q=; b=jI6Ly9NOhS1CJVDcDoKjwgjST/iQVlVpolh/hifxBJGV2nz6t+8GlFWLZ4bzANtEHt /Gubm7aHSBwsXnEHDwS28/J38FGObVki5RAT4+MKtWxDxCzdeulLhOlDre6S80gl/1TC 7EygHVvY8rB9EzbY4vuEGBvLIXgnThM7ofFVrmOOyUnxK3+Cw8/lUB1Qrw2zcQyD28sq aOwfF4Jak4nLrwlBRcrBmxMV3zq77fRSSDlQwIxXNAn/g3MvLudGjEbIzxRGELLjSs75 zSMaaTiP34sWBjEuq0+gSjLhjHao2DyO1AI08J/NXT1fTMGf7TSzj1Dp3m+TJmQDgi3k TF6A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1788974821; x=1789579621; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=BxkJmMQiuFGLIVhYvP7iekSRoJyyqxrT2LFSLJP0a4Q=; b=Mqmr/UK2DhL5EJzlJgKQD+AVz7ATpvjy3p+XYKUf/vRWVsxCPLtxSRIOGwxAemLSDr py8z6XznGXZoB1iqSoY1Ejo0Dbge4ldz6ytR8t68RHBGjE8GBQLeUe3++EqE6kna2eFb CiaBqORsM/dLYCkDoBc7yO9rao8EbWRMNtWZBPvjQl8BVrmLmNrp/XKiwRs1pYyx2EHY S5eGJDL+SSz9XzhKAajBIrxVwDCUo7Xy4D6mOnNISW7dTg1SOFUcf3lJ+sbu/I9vjdfy MBSAIlo+0IAcYhyGQtLfDWCE5v2ObYDTxkZhoiZ3cgALuNGoc9DpNsJpD3Pr8awmlndk 5veg== X-Forwarded-Encrypted: i=1; AKwUvBzLPPCQmwyTXH7rbAXV2KFTCDRAIPZbTi0H6QPhbYxFXGt12V2mmF+tgmvQjA6KLj1jxiQTD8dfyGj4@vger.kernel.org X-Gm-Message-State: AFuF++nwATZbTHLKHsN0TgOapwxkW119rMA2e7aPzwgkSZUKx68Yl0vM qSM92Y2SZCFtmMAx3Nkf2E74sj6L9rEMB8YK9cbsYU7szaZSTjhDw3uy X-Gm-Gg: AYBFou3kjMp/B7mErdFZ2QDEiV5ranIk8HSnEhxquqpDSKO9i6/iSEI+QxUEbJkzZdA cs9xaQE9qJAAoYeg7N2HfL+G2+MAaCC5jfD8HcTyrW/xAY+f7NViNpfVPgTNe+k0sjAUNFHSy7X MVsYJKS3NOOnrDOUFkX9GELGqI8NRajraAYA8l+EQwCbuY75qkUh9aRTOYEQc8KHNIf0sCrHenN kClNPHcGrIGB5vj1IycLLpJZ5ELZOkgAbxAz+UO7IsA5t7Q0cKZ+M+LrY0ygcTHo1BilLFapzGx bmMSXB2KRAuANoHhD6HIXeVEmM5sXG9N55UwpXZ6pi0AiTMV8SSis6iFcDOcocDGt1FugI1nuT/ V3e5sgdM7uX+yzV+khn8Carsmp+yAwEs2EHgMjVx8PKlF4+TaPuAycCCsW5WRrwVerF5uoD8yjs YCvdmy/aSBRsq5F6zsqxEB8FhIyvAxhMw2Cnk4/xwQW1mXtOAHCeq3pmw37F4joe39Mcu8O9jgw cxOtB4HtZB2JCiNVpVPP/rddEUOWciKg1KVT0gya+l9fLwyfMLR X-Received: by 2002:a05:6a21:9d84:b0:3d3:af85:eb98 with SMTP id adf61e73a8af0-3da3a16a579mr57975715637.26.1788974820346; Wed, 09 Sep 2026 10:27:00 -0700 (PDT) Received: from google.com ([2a00:79e0:2ebe:8:2d43:5153:5c50:643e]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3339a534df1sm52422943eec.7.2026.09.09.10.26.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 10:26:59 -0700 (PDT) Date: Wed, 9 Sep 2026 10:26:55 -0700 From: Dmitry Torokhov To: Arnd Bergmann Cc: Lee Jones , mfd@lists.linux.dev, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Arnd Bergmann , Daniel Thompson , Jingoo Han , Mauro Carvalho Chehab , Liam Girdwood , Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Guenter Roeck , Linus Walleij , Bartosz Golaszewski , Jonathan Cameron , Pavel Machek , Michael Hennerich , Support Opensource , Sebastian Reichel , Alexandre Belloni , Helge Deller , dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, linux-media@vger.kernel.org, devicetree@vger.kernel.org, linux-hwmon@vger.kernel.org, patches@opensource.cirrus.com, linux-watchdog@vger.kernel.org, linux-gpio@vger.kernel.org, linux-iio@vger.kernel.org, linux-input@vger.kernel.org, linux-leds@vger.kernel.org, linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-fbdev@vger.kernel.org, linux-sound@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, llvm@lists.linux.dev Subject: Re: [PATCH 00/14] mfd: unused driver purge Message-ID: References: <20260909132153.1596191-1-arnd@kernel.org> Precedence: bulk X-Mailing-List: linux-leds@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260909132153.1596191-1-arnd@kernel.org> On Wed, Sep 09, 2026 at 03:21:37PM +0200, Arnd Bergmann wrote: > From: Arnd Bergmann > > As part of my cleanup of old platforms, I had a look at all drivers that > may have become unused because the last platform_data or DT definition > was removed, or because of unmet Kconfig dependencies. > > These are all the mfd drivers I found. The first ten in the list > actually turned out to have been unusable long before my series, and > I have added explanations on how I determined this in each patch. The > last four patches are still in use in linux-7.3 but become unused after > my series [1] that I hope to get merged for 7.4. > > Somewhat unorthodox, I took a shortcut here and remove both the mfd drivers > and the corresponding subsystem drivers (gpio, hwmon, iio, input, led, > media, power, regulator, rtc, video, watchdog, asoc) in a combined patch, > to simplify the interdependencies: removing just the mfd driver would > leave unselectable or broken drivers in other subsystems. I also have > additional patches for each of the other subsystems, currently a total > of 300 patches, many of which still need better testing or proper > changelog texts. > > Please let me know if you all think this approach is ok, or if I should > explode this further and turn these 14 patches into 70 individual ones > by splitting them per subsystem. Sounds good to me, especially if Lee makes an immutable branch from this pull so we can all pull it in... Acked-by: Dmitry Torokhov # for input Thanks. -- Dmitry