linux-kernel - Re: [PATCH 2/8] dt-bindings: crypto : Add new compatible strings for qcom-qce

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Message-ID: <CAH=2Ntw2dMaSYsx-Q=mXx_mMBr5PcmwhhBvTcmPYYKmy=rcCqw@mail.gmail.com>
Date:   Wed, 17 Mar 2021 18:50:38 +0530
From:   Bhupesh Sharma <bhupesh.sharma@...aro.org>
To:     Rob Herring <robh@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org,
        Thara Gopinath <thara.gopinath@...aro.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-crypto@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        bhupesh.linux@...il.com
Subject: Re: [PATCH 2/8] dt-bindings: crypto : Add new compatible strings for qcom-qce

Hi Rob,

Thanks for your review.

On Wed, 17 Mar 2021 at 03:58, Rob Herring <robh@...nel.org> wrote:
>
> On Wed, Mar 10, 2021 at 10:54:57AM +0530, Bhupesh Sharma wrote:
> > Newer qcom chips support newer versions of the qce IP, so add
> > new compatible strings for qcom-qce (in addition to the existing
> > "qcom,crypto-v5.1").
> >
> > With [1], Thara tried to add the support for new compatible strings,
> > but we couldn't conclude on the approach to be used. Since we have
> > a number of new qcom arm64 SoCs available now, several of which
> > support the same crypto IP version, so it makes more sense to use
> > the IP version for the compatible string, rather than using the soc
> > name as the compatible string.
> >
> > [1]. https://lore.kernel.org/linux-arm-msm/20201119155233.3974286-7-thara.gopinath@linaro.org/
> >
> > Cc: Thara Gopinath <thara.gopinath@...aro.org>
> > Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
> > Cc: Rob Herring <robh+dt@...nel.org>
> > Cc: Andy Gross <agross@...nel.org>
> > Cc: Herbert Xu <herbert@...dor.apana.org.au>
> > Cc: David S. Miller <davem@...emloft.net>
> > Cc: Stephen Boyd <sboyd@...nel.org>
> > Cc: Michael Turquette <mturquette@...libre.com>
> > Cc: linux-clk@...r.kernel.org
> > Cc: linux-crypto@...r.kernel.org
> > Cc: devicetree@...r.kernel.org
> > Cc: linux-kernel@...r.kernel.org
> > Cc: bhupesh.linux@...il.com
> > Signed-off-by: Bhupesh Sharma <bhupesh.sharma@...aro.org>
> > ---
> >  Documentation/devicetree/bindings/crypto/qcom-qce.txt | 6 +++++-
> >  1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/Documentation/devicetree/bindings/crypto/qcom-qce.txt b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
> > index 07ee1b12000b..217b37dbd58a 100644
> > --- a/Documentation/devicetree/bindings/crypto/qcom-qce.txt
> > +++ b/Documentation/devicetree/bindings/crypto/qcom-qce.txt
> > @@ -2,7 +2,11 @@ Qualcomm crypto engine driver
> >
> >  Required properties:
> >
> > -- compatible  : should be "qcom,crypto-v5.1"
> > +- compatible  : Supported versions are:
> > +             - "qcom,crypto-v5.1", for ipq6018
> > +             - "qcom,crypto-v5.4", for sdm845, sm8150
>
> 2 SoCs sharing 1 version doesn't convince me on using version numbers.
> Having 4 versions for 5 SoCs further convinces me you should stick with
> SoC specific compatibles as *everyone* else does (including most QCom
> bindings).

Fair enough. I will add SoC specific compatibles in v2, which should
be out shortly.

Regards,
Bhupesh

> > +             - "qcom,crypto-v5.5", for sm8250
> > +             - "qcom,crypto-v5.6", for sm8350
> >  - reg         : specifies base physical address and size of the registers map
> >  - clocks      : phandle to clock-controller plus clock-specifier pair
> >  - clock-names : "iface" clocks register interface
> > --
> > 2.29.2
> >