linux-kernel - Re: [PATCH 4/7] dt-bindings: timers: Add Tenstorrent Blackhole compatible

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Message-ID: <aMmhu9ZfNnW+Zh8a@x1>
Date: Tue, 16 Sep 2025 10:43:23 -0700
From: Drew Fustini <fustini@...nel.org>
To: Rob Herring <robh@...nel.org>
Cc: Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Alexandre Ghiti <alex@...ti.fr>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Samuel Holland <samuel.holland@...ive.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Anup Patel <anup@...infault.org>, Arnd Bergmann <arnd@...db.de>,
	Joel Stanley <jms@...storrent.com>, Joel Stanley <joel@....id.au>,
	Michael Neuling <mikey@...ling.org>,
	Nicholas Piggin <npiggin@...il.com>,
	Michael Ellerman <mpe@...nel.org>, Andy Gross <agross@...nel.org>,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, Conor Dooley <conor@...nel.org>,
	Drew Fustini <dfustini@...storrent.com>
Subject: Re: [PATCH 4/7] dt-bindings: timers: Add Tenstorrent Blackhole
 compatible

On Tue, Sep 16, 2025 at 08:44:00AM -0500, Rob Herring wrote:
> On Sat, Sep 13, 2025 at 02:31:03PM -0700, Drew Fustini wrote:
> > From: Drew Fustini <dfustini@...storrent.com>
> > 
> > Document clint compatible for the Tenstorrent Blackhole A0 SoC.
> > 
> > Signed-off-by: Drew Fustini <dfustini@...storrent.com>
> > ---
> >  Documentation/devicetree/bindings/timer/sifive,clint.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
> > index d85a1a088b35dabc0aa202475b926302705c4cf1..198146c59de0c95a2ffa052c8d4d7aa3f91f8e92 100644
> > --- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
> > +++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
> > @@ -36,6 +36,7 @@ properties:
> >                - starfive,jh7100-clint   # StarFive JH7100
> >                - starfive,jh7110-clint   # StarFive JH7110
> >                - starfive,jh8100-clint   # StarFive JH8100
> > +              - tenstorrent,blackhole-a0-clint # Tenstorrent Blackhole
> 
> We usually don't put Si versions (A0) in compatible strings unless later 
> versions changed in incompatible ways. Perhaps if you already knew that 
> B0 was different, then it would be appropriate. Or am I misunderstanding 
> what A0 means?
> 
> Rob

Okay, thanks for explaining. A0 is the silicon revision, and it is
currently the only version that exists. I was just trying to be as
specific as possible. I'm okay with dropping '-a0'.

Should I change the plic compatible to 'tenstorrent,blackhole-plic' too?

I see you gave a Rb for riscv/tenstorrent.yaml but that does have
'tenstorrent,blackhole-a0-card' and 'tenstorrent,blackhole-a0'. Should I
drop '-a0' from those too or leave as-is?

Thanks,
Drew