Re: [PATCH V4 1/5] dt-bindings: rtc: Remove the LS2X from the trivial RTCs

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On Fri, May 26, 2023 at 01:22:15PM +0100, Jiaxun Yang wrote:
> 
> 
> > 2023年5月26日 13:06,Conor Dooley <conor.dooley@xxxxxxxxxxxxx> 写道:
> Hi all,
> 
> [...]
> My two cents here as Loongson64 maintainer.
> 
> > 
> >>> To maintain compatibility with the existing devicetrees, should the old
> >>> "loongson,ls2x-rtc" be kept in the driver?
> >> 
> >> No, It seems that wildcards in compatible are not allowed."
> >> loongson,ls2x-rtc" itself was part of this patch series at one time,
> >> but apparently it is not the right way to describe these chips.
> > 
> > Right, but it has been merged - you are deleting the driver that supports
> > it after all - which means that any dtb with the old compatible will
> > stop working.
> It is perfectly fine to break DTB compatibility for Loongson64 systems
> As they *only* use builtin dtb. Bootloader will only pass machine type information
> and kernel will choose one dtb from it’s dtbs pool.

Ah, that is good to know thanks! I think that should be mentioned in the
commit messages for the next revision.

Cheers,
Conor.

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