linux-kernel - Re: [PATCH 6/6] riscv: dts: starfive: Add crypto and DMA node for VisionFive 2

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Message-ID: <Y4jslJfTVtQ9cIGm@spud>
Date:   Thu, 1 Dec 2022 18:04:04 +0000
From:   Conor Dooley <conor@...nel.org>
To:     JiaJie Ho <jiajie.ho@...rfivetech.com>
Cc:     "Conor.Dooley@...rochip.com" <Conor.Dooley@...rochip.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "kernel@...il.dk" <kernel@...il.dk>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-riscv@...ts.infradead.org" <linux-riscv@...ts.infradead.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>
Subject: Re: [PATCH 6/6] riscv: dts: starfive: Add crypto and DMA node for
 VisionFive 2

On Thu, Dec 01, 2022 at 06:17:26AM +0000, JiaJie Ho wrote:
> > -----Original Message-----
> > From: Conor.Dooley@...rochip.com <Conor.Dooley@...rochip.com>

> > Hey Jia Jie Ho,
> > 
> > On 30/11/2022 05:52, Jia Jie Ho wrote:
> > > [You don't often get email from jiajie.ho@...rfivetech.com. Learn why
> > > this is important at https://aka.ms/LearnAboutSenderIdentification ]
> > >
> > > EXTERNAL EMAIL: Do not click links or open attachments unless you know
> > > the content is safe
> > >
> > > Adding StarFive crypto IP and DMA controller node to VisionFive 2 SoC.
> > >
> > > Signed-off-by: Jia Jie Ho <jiajie.ho@...rfivetech.com>
> > > Signed-off-by: Huan Feng <huan.feng@...rfivetech.com>
> > 
> > Out of curiosity, what was Huan Feng's contribution to this patch?
> > Did they co-develop it, or is there some other reason?
> > 
> Hi Conor, 
> Yes, Huan Feng co-developed this driver.

In that case, the SoB block should look like:

Co-developed-by: Huan Feng <huan.feng@...rfivetech.com>
Signed-off-by: Huan Feng <huan.feng@...rfivetech.com>
Signed-off-by: Jia Jie Ho <jiajie.ho@...rfivetech.com>

Similarly for any other patches they may have co-developed :)

> > >
> > > diff --git
> > > a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> > > b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> > > index 450e920236a5..da2aa4d597f3 100644
> > > --- a/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> > > +++ b/arch/riscv/boot/dts/starfive/jh7110-starfive-visionfive-v2.dts
> > > @@ -115,3 +115,11 @@ &tdm_ext {
> > >   &mclk_ext {
> > >          clock-frequency = <49152000>;
> > >   };
> > > +
> > > +&sec_dma {
> > > +       status = "okay";
> > > +};
> > > +
> > > +&crypto {
> > > +       status = "okay";
> > > +};
> > 
> > In what scenario would you not want to have these enabled?

> These drivers are always enabled.
> Is everything ok with the dts node entries?

If the hardware is always present, why not drop the "disabled" in
jh7110.dtsi & these two entries marking them as "okay" in the .dts?

> > > diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > index 4ac159d79d66..745a5650882c 100644
> > > --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
> > > @@ -455,5 +455,41 @@ uart5: serial@...20000 {
> > >                          reg-shift = <2>;
> > >                          status = "disabled";
> > >                  };
> > > +
> > > +               sec_dma: sec_dma@...08000 {

> > > +                       status = "disabled";

> > > +               };
> > > +
> > > +               crypto: crypto@...00000 {

> > > +                       status = "disabled";

> > > +               };
> > >          };
> > >   };

Thanks,
Conor.