lkml.org 
[lkml]   [2018]   [May]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: [PATCH v6 2/6] dt-bindings: Add the rzn1-clocks.h file
Date
Hi Geert,

On 30 May 2018 14:37 Geert Uytterhoeven wrote:
> On Wed, May 30, 2018 at 3:30 PM, Phil Edworthy wrote:
> > On 25 May 2018 10:13 Geert Uytterhoeven wrote:
> > [snip]
> >
> >> Now, given the clock definitions for RZ/N1[DSL] are the same
> >> (although some don't exist on some variants), you could keep on using
> >> RZN1_CLK_FOO for the names of the defines, and store them in a
> common
> >> file, included by the soc-specific file. But please make clear the
> >> common file cannot be included directly, so the filename does not
> >> become part of the DT ABI, and you are shielded from future marketing
> >> silliness (e.g. next quarter's RZ/N1X being totally different).
> > How does an include filename become part of the DT ABI?
> > I thought the dtb is the ABI, not the dts. Am I wrong?
>
> You're right. In se the DT ABI applies to the DTB, not to the DTS.
>
> The definitions inside the include file are part of the DT bindings, and thus
> cannot be changed. Your DTS files get these definitions by including the
> header file, so the header filename is also part of the bindings, and thus can't
> be changed that easily.
That seems a bit onerous...
It makes sense that bindings that affect the dtb can only be added to, so that
an old dtb still works. However, I would have thought it's the value of the
constant that is the ABI, not the symbol name used to specify it.

Thanks for you feedback!
Phil
\
 
 \ /
  Last update: 2018-05-30 15:50    [W:0.050 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site