Re: [PATCH v2 4/8] dt-bindings: sifive,ccache0: Support StarFive JH7110 SoC

From: Conor Dooley <conor.dooley@microchip.com>
To: Hal Feng <hal.feng@starfivetech.com>
Cc: Conor Dooley <conor@kernel.org>,
	"linux-riscv@lists.infradead.org"
	<linux-riscv@lists.infradead.org>,
	"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Ben Dooks <ben.dooks@sifive.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Marc Zyngier <maz@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
	Michael Turquette <mturquette@baylibre.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Linus Walleij <linus.walleij@linaro.org>,
	Emil Renner Berthing <emil.renner.berthing@canonical.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v2 4/8] dt-bindings: sifive,ccache0: Support StarFive JH7110 SoC
Date: Tue, 22 Nov 2022 09:07:26 +0000	[thread overview]
Message-ID: <Y3yRTuo69JUsfLqk@wendy> (raw)
In-Reply-To: <a5193e23-efe1-fa65-15de-d53b80b87d63@starfivetech.com>

On Tue, Nov 22, 2022 at 04:40:23PM +0800, Hal Feng wrote:
> On Fri, 18 Nov 2022 19:39:52 +0800, Conor Dooley wrote:
> > On Fri, Nov 18, 2022 at 11:37:50AM +0000, Conor Dooley wrote:
> > > On Fri, Nov 18, 2022 at 09:17:10AM +0800, Hal Feng wrote:
> > > > From: Emil Renner Berthing <kernel@esmil.dk>
> > > > 
> > > > This cache controller is also used on the StarFive JH7110 SoC.
> > > 
> > > "... and configured identically to that of the FU740"?
> > > Anyways,
> > > Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
> > 
> > Actually, after looking at the next patch - why can you not fall back to
> > the fu740 one since you appear to have the same configuration as it?
> 
> Right, I will drop this patch and use "sifive,fu740-c000-ccache" as
> compatible in dts.

Uh, that's not quite what I was suggesting. Rather than using that one
in isolation, you can do the following in your dt:
"starfive,jh7110-ccache", "sifive,fu740-c000-ccache"

And then in the driver we need to make no changes - unless down the line
we find some sort of issue that requires special handling etc. There's
no harm in having a "starfive,jh7110-ccache" IMO.

Thanks,
Conor.

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