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ARM: mark Cortex-M3/M4/M7 based boards as deprecated

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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.

Acked-by: Vladimir Zapolskiy <vz@mleia.com> # NXP LPC18xx/LPC43xx
Acked-by: Vladimir Murzin <vladimir.murzin@arm.com> # MPS2
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Acked-by: Frank Li <Frank.Li@nxp.com> # i.MX
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2026-06-17 12:50:39 +02:00
commit f70425ca42
4 changed files with 20 additions and 10 deletions
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