[PATCH] ARM: dts: stm32: omit unused pinctrl groups from stm32mp13 dtb files

[Alexandre TORGUE]

On 7/4/24 19:56, Marek Vasut wrote:
> On 7/4/24 6:40 PM, Alexandre TORGUE wrote:
>> Hi Marek
> 
> Hi,
> 
>> On 6/29/24 22:36, Marek Vasut wrote:
>>> stm32mp13-pinctrl.dtsi contains nearly all pinctrl groups collected from
>>> all boards. Most of them end up unused by a board and only waste binary
>>> space. Add /omit-if-no-ref/ to the groups to scrub the unused groups
>>> from the dtbs.
>>>
>>> Use the following regex to update the file and drop two useless 
>>> newlines too:
>>> s@^\t[^:]\+: [^ ]\+ {$@\t/omit-if-no-ref/\r&@
>>
>> I understand the aim of this patch but I'm just wondering about DT 
>> overlay that would need one of those configurations. IMO, in this case 
>> the DT overlay will not apply.
> 
> It is always a compromise, either we will have massive ever-growing base 
> DTs or DTOs would have to ship their own pinmux settings. I think I am 
> fine with the later option, also that's what the MP15 is doing already.

Yes, it is probably the best solution to define pinmux in DTSO that 
would need a new pin config. For some use case, we will have pinconfig 
duplication in dtso but as you said it is a good compromise.