From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 6989D33AD8B for ; Thu, 2 Jul 2026 08:43:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782981838; cv=none; b=ZqZ2JRngcBur6u8rVSJ83i/IqyPbMbl6xbRTU2ngEBAfK5+nyXXjsTolQGx4BjzcApC7/disfySEPyK60KvnqJTOiVVAUPNMOBdPitSdD1I5Q2oHc5h9T6NNjyTUlrZl0/XgXA2JnUyJJX6IeoHbbPUsMDAh2AbVIpl3BkOhq4Q= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782981838; c=relaxed/simple; bh=rPDevm0YRy77Ne+62P1HMegZMMVYnYj/WPFGNqP8hQU=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=Z2KaSrxowpDh++rOOtZ3LrLZvIfECNiq7usxf4raZThsiXTZlO/RtkW4CCalFeBLQLCg/fRPrZMnbwv0fFL/F6fDa/iwGKq47eX44sduhuWBZLRkh2KnYGQBWfNUSnEcR8sRJX28N87f7tB+ueWXIVYDL4HU+e6v5Pa8ewktuqE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=nuVyVZ97; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="nuVyVZ97" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 676A4288E; Thu, 2 Jul 2026 01:43:51 -0700 (PDT) Received: from [10.1.36.193] (e121487-lin.cambridge.arm.com [10.1.36.193]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id E584E3F905; Thu, 2 Jul 2026 01:43:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1782981835; bh=rPDevm0YRy77Ne+62P1HMegZMMVYnYj/WPFGNqP8hQU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=nuVyVZ97ajw+6v98/4yS91JCo/Xkwuch52Og9baGNKpm0As7HkehfcOM3vrN9x49A d8N9GHMU1JYWDjRYsfsZPaXsdUAC3MvElbKlWVxslNdPdsPnWznzOR06TMSLtIwUUD yuruJZnUwxa5Yums5P3FG8S2xbngrUfYXS/K+ISI= Message-ID: <1de8cf96-3e46-4d86-818b-7a2a1ded6166@arm.com> Date: Thu, 2 Jul 2026 09:43:46 +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 17/19] ARM: mark Cortex-M3/M4/M7 based boards as deprecated To: Arnd Bergmann , linux-arm-kernel@lists.infradead.org, soc@lists.linux.dev Cc: linux-kernel@vger.kernel.org, Arnd Bergmann , Aaro Koskinen , Alexander Sverdlin , Alexandre Belloni , Alexandre Torgue , Andrew Lunn , Ard Biesheuvel , Claudiu Beznea , Daniel Mack , Ethan Nelson-Moore , Frank Li , Gregory Clement , Haojian Zhuang , "Jeremy J. Peper" , Kristoffer Ericson , Krzysztof Kozlowski , Linus Walleij , Mark Brown , Marc Zyngier , Mike Rapoport , Nicolas Ferre , Patrice Chotard , Ralph Siemsen , Robert Jarzmik , Russell King , Sascha Hauer , Sebastian Hesselbarth , Stefan Agner , Stefan Wiehler , Tony Lindgren , Vladimir Zapolskiy , Will Deacon References: <20260701212353.2196041-1-arnd@kernel.org> <20260701212353.2196041-18-arnd@kernel.org> Content-Language: en-GB From: Vladimir Murzin In-Reply-To: <20260701212353.2196041-18-arnd@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 7/1/26 22:23, Arnd Bergmann wrote: > From: Arnd Bergmann > > The Cortex-M3/M4/M7 cores were designed as a replacement for the earlier > ARM7TDMI and ARM9TDMI microarchitectures used in older microcontrollers. > > At the moment, Linux can run these cores either when they are integrated > into a larger SoC, or as standalone microcontrollers. While there was > a lot of development work going into Cortex-M support from 2011 to 2016, > this largely stopped when it became clear that Zephyr and other RTOS > had taken over that market. To date, the only Cortex-M based based > microcontroller boards supported upstream are reference implementations. > > Schedule these for removal after the next LTS kernel, so if any users > remain that want to update their kernels, they can stay on that > version for a few years before having to maintain the platform support > out of tree. > > Signed-off-by: Arnd Bergmann > --- > arch/arm/Kconfig | 8 ++++++-- > arch/arm/mach-at91/Kconfig | 4 +++- > arch/arm/mach-imx/Kconfig | 4 +++- > arch/arm/mach-stm32/Kconfig | 14 ++++++++------ > 4 files changed, 20 insertions(+), 10 deletions(-) > [snip] > config ARCH_MPS2 > - bool "ARM MPS2 platform" > + bool "ARM MPS2 platform (DEPRECATED)" > depends on ARM_SINGLE_ARMV7M > select ARM_AMBA > select CLKSRC_MPS2 > @@ -493,6 +495,8 @@ config ARCH_MPS2 > Please, note that depends which Application Note is used memory map > for the platform may vary, so adjustment of RAM base might be needed. > > + This platform is scheduled for removal in early 2027 > + > # Definitions to make life easier > config ARCH_ACORN > bool Acked-by: Vladimir Murzin # MPS2 Thanks Vladimir