Re: [PATCH 00/11] ARM: NXP: Drop NOMMU platform support

[Arnd Bergmann]

On Fri, Jun 19, 2026, at 18:07, Vladimir Zapolskiy wrote:
> On 6/19/26 18:40, Frank.Li@xxxxxxxxxxx wrote:
>> Commercial users and hardware vendors migrated to Zephyr or other RTOS
>> solutions years ago, leaving the NOMMU platform support effectively
>> unused and unmaintained.
>> 
>> Remove the obsolete support to reduce maintenance burden and simplify the
>> Freescale/nxp platform code.
>> 
>> Some driver code still be kept and may clean up later since it is possible
>> reused by other SoC.

Thanks a lot for going through these already!
 
>> Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
>
> This change is a bit too early to happen, I prefer to get it orchestrated
> by Arnd. So, as for today I NAK the change for its NXP LPC part.

I am planning to post a series of deprecation notices for platforms
that I would like to remove for one reason or another. Since it's only
one more merge before the next (S)LTS kernel, my idea was to post
the series once v7.2-rc1 is out, merge it into 7.3-LTS and remove
the deprecated code early next year once the LTS release is announced.

I have rebased uploaded my current draft to
https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git/log/?h=rfc-arm-deprecation-7.2

None of those are finalized of course, and we can do any part
of it earlier or later (or not at all) if there is a good reason.

If you to remove the vf610m4/imx7d-cm4/lpc43xx/lpc18xx portions
earlier, that is definitely fine with me. For imxrt1050, there a
slightly higher chance that this is still used, so I would
prefer to wait for the LTS kernel on that one.

>> Frank Li (11):
>>        ARM: dts: vf610m4: Remove NOMMU platform support
>>        ARM: dts: imxrt1050: Remove NOMMU platform support
>>        ARM: imx: Remove NOMMU platform support
>>        clk: imx: imxrt1050: Remove NOMMU platform support
>>        pinctrl: freescale: IMXRT: Remove NOMMU platform support
>>        ARM: imxrt_defconfig: Remove NOMMU platform support
>>        ARM: dts: lpc: Remove NOMMU platform support
>>        ARM: mach-lpc: Remove NOMMU platform support
>>        ARM: configs: lpc*: Remove NOMMU platform support
>>        clk: nxp: lpc: Remove NOMMU platform support
>>        pinctrl: nxp: lpc: Remove NOMMU platform support

>
> NXP LPC32xx is ARMv5 and it has MMU, hence it's plainly out of scope of
> the proposed "dropping NOMMU platform support".

Agreed. There are a few more platforms with MMU that I would like
to drop because they were never converted to devicetree support,
but there is nothing wrong with lpc32xx. 

      Arnd