linux-kernel - Re: [PATCH 8/9] ARM: mstar: Add smp ctrl registers to infinity2m dtsi

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Date:   Mon, 30 Nov 2020 15:57:58 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Daniel Palmer <daniel@...f.com>
Cc:     DTML <devicetree@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, Rob Herring <robh@...nel.org>,
        Willy Tarreau <w@....eu>
Subject: Re: [PATCH 8/9] ARM: mstar: Add smp ctrl registers to infinity2m dtsi

On Mon, Nov 30, 2020 at 3:11 PM Daniel Palmer <daniel@...f.com> wrote:
>
> Hi Arnd,
>
> On Mon, 30 Nov 2020 at 22:44, Arnd Bergmann <arnd@...nel.org> wrote:
> >
> > On Mon, Nov 30, 2020 at 2:10 PM Daniel Palmer <daniel@...f.com> wrote:
> > >
> > > +&riu {
> > > +       smpctrl@...000 {
> > > +               compatible = "mstar,smpctrl";
> > > +               reg = <0x204000 0x200>;
> > > +               status = "okay";
> > > +       };
> >
> > You probably want some more specific compatible value, in case there are
> > multiple SoCs from mstar that have an smpctrl block and they don't all use
> > an exactly identical register layout.
>
> From what I can tell these are in the same place for the infinity2m and
> the other SMP chip in this series that are in the infinity6 series.
>
> Would "mstar,i2m-smpctrl" make more sense?

Please use the exact name of the chip for the most specific name,
plus a generic identifier that makes sense for all of them. For the
generic identifier, you can normally just use whatever the oldest
chip is that you can find with that IP block.

      Arnd