Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Tue, 22 Nov 2022 09:07:26 +0000
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
Message-ID: <Y3yRTuo69JUsfLqk@wendy>
References: <20221118011714.70877-1-hal.feng@starfivetech.com>
 <20221118011714.70877-5-hal.feng@starfivetech.com>
 <Y3duiJguYE6VrVLP@spud>
 <Y3dvCPP1g0LzzHFO@spud>
 <a5193e23-efe1-fa65-15de-d53b80b87d63@starfivetech.com>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <a5193e23-efe1-fa65-15de-d53b80b87d63@starfivetech.com>
Precedence: bulk

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.