Re: [PATCH 03/17] ARM: dts: r8a7742: Add I2C and IIC support

Lad, Prabhakar
2020-05-18T09:43:53Z

Hi Wolfram,

On Mon, May 18, 2020 at 10:26 AM Wolfram Sang
<wsa+renesas@sang-engineering.com> wrote:
>
>
> > > However, both versions (with and without automatic transmission) are
> > > described with the same "renesas,iic-r8a7742" compatible. Is it possible
> > > to detect the reduced variant at runtime somehow?
> > >
> > I couldn't find anything the manual that would be useful to detect at runtime.
> >
> > > My concern is that the peculiarity of this SoC might be forgotten if we
> > > describe it like this and ever add "automatic transmissions" somewhen.
> > >
> > Agreed.
>
> Well, I guess reading from a register which is supposed to not be there
> on the modified IP core is too hackish.
>
> Leaves us with a seperate compatible entry for it?
>
Sounds okay to me, how about "renesas,iic-no-dvfs" ? So that this
could be used on all the SoC's which don't support DVFS.

Cheers,
--Prabhakar