linux-kernel - Re: [PATCH v2 3/6] dt-bindings: crypto: Add Texas Instruments MCRC64

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Message-ID: <20230811-imminent-fancied-89663c373ab5@spud>
Date:   Fri, 11 Aug 2023 16:36:54 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Kamlesh Gurudasani <kamlesh@...com>
Cc:     Herbert Xu <herbert@...dor.apana.org.au>,
        "David S. Miller" <davem@...emloft.net>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Nishanth Menon <nm@...com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH v2 3/6] dt-bindings: crypto: Add Texas Instruments MCRC64

On Fri, Aug 11, 2023 at 04:34:33PM +0100, Conor Dooley wrote:
> On Fri, Aug 11, 2023 at 12:58:50AM +0530, Kamlesh Gurudasani wrote:
> > Add binding for Texas Instruments MCRC64
> > 
> > MCRC64 engine calculates 64-bit cyclic redundancy checks (CRC)
> > according to the ISO 3309 standard.
> > 
> > The ISO 3309 64-bit CRC model parameters are as follows:
> >     Generator Polynomial: x^64 + x^4 + x^3 + x + 1
> >     Polynomial Value: 0x000000000000001B
> >     Initial value: 0x0000000000000000
> >     Reflected Input: False
> >     Reflected Output: False
> >     Xor Final: 0x0000000000000000
> > 
> > Signed-off-by: Kamlesh Gurudasani <kamlesh@...com>
> > ---
> >  Documentation/devicetree/bindings/crypto/ti,mcrc64.yaml | 47 +++++++++++++++++++++++++++++++++++++++++++++++
> >  MAINTAINERS                                             |  5 +++++
> >  2 files changed, 52 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/crypto/ti,mcrc64.yaml b/Documentation/devicetree/bindings/crypto/ti,mcrc64.yaml
> > new file mode 100644
> > index 000000000000..38bc7efebd68
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/crypto/ti,mcrc64.yaml
> > @@ -0,0 +1,47 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/crypto/ti,mcrc64.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Texas Instruments MCRC64
> > +
> > +description: The MCRC64 engine calculates 64-bit cyclic redundancy checks
> 
> A newline after "description" please.
> 
> > +  (CRC) according to the ISO 3309 standard.
> > +
> > +maintainers:
> > +  - Kamlesh Gurudasani <kamlesh@...com>
> > +
> > +properties:
> > +  compatible:
> > +    const: ti,am62-mcrc64
> 
> Is the am62 an SoC or a family of SoCs? I googled a wee bit for am62 &
> there seems to be an am625 and an am623?

Or is it an am62p5, in which case the compatible should contain
ti,am62p5 I suppose. Sorry for my confusion here, its not really clear
me too since I've been seeing many different-but-similar product names
the last few days.

Thanks,
Conor.

> 
> Otherwise, this looks good to me.
> 
> > +
> > +  reg:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  power-domains:
> > +    maxItems: 1
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - clocks
> > +  - power-domains
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/soc/ti,sci_pm_domain.h>
> > +
> > +    crc@...00000 {
> > +      compatible = "ti,am62-mcrc64";
> > +      reg = <0x30300000 0x1000>;
> > +      clocks = <&k3_clks 116 0>;
> > +      power-domains = <&k3_pds 116 TI_SCI_PD_EXCLUSIVE>;
> > +    };
> > +
> > +...
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 02a3192195af..66b51f43d196 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -21481,6 +21481,11 @@ S:	Maintained
> >  F:	Documentation/devicetree/bindings/iio/adc/ti,lmp92064.yaml
> >  F:	drivers/iio/adc/ti-lmp92064.c
> >  
> > +TI MEMORY CYCLIC REDUNDANCY CHECK (MCRC64) DRIVER
> > +M:	Kamlesh Gurudasani <kamlesh@...com>
> > +S:	Maintained
> > +F:	Documentation/devicetree/bindings/crypto/ti,mcrc64.yaml
> > +
> >  TI PCM3060 ASoC CODEC DRIVER
> >  M:	Kirill Marinushkin <kmarinushkin@...dec.com>
> >  L:	alsa-devel@...a-project.org (moderated for non-subscribers)
> > 
> > -- 
> > 2.34.1
> > 



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