linux-kernel - Re: [PATCH 1/4] dt-bindings: firmware: Add bindings for Samsung smc

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Date:   Tue, 26 Jul 2022 08:55:46 +0900
From:   Dongjin Yang <dj76.yang@...sung.com>
To:     Krzysztof Kozlowski <krzk@...nel.org>,
        "jesper.nilsson@...s.com" <jesper.nilsson@...s.com>,
        "lars.persson@...s.com" <lars.persson@...s.com>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzk+dt@...nel.org" <krzk+dt@...nel.org>,
        "lee.jones@...aro.org" <lee.jones@...aro.org>
CC:     "javierm@...hat.com" <javierm@...hat.com>,
        "bjorn.andersson@...aro.org" <bjorn.andersson@...aro.org>,
        "linux-arm-kernel@...s.com" <linux-arm-kernel@...s.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Moon-Ki Jun <moonki.jun@...sung.com>,
        Sang Min Kim <hypmean.kim@...sung.com>,
        Wangseok Lee <wangseok.lee@...sung.com>
Subject: Re: [PATCH 1/4] dt-bindings: firmware: Add bindings for Samsung smc

Sorry for late response. 

On 14/07/2022 04:28, Krzysztof Kozlowski wrote:
> On 13/07/2022 06:53, Dongjin Yang wrote:
> > Add an devicetree bindings for Samsung secure monitor call service.
> > This driver is used for SoCs produced by Samsung Foundry to provide
> > SMC call. This patch supports register read/write request to secure
> > monitor. Also, SMC call request which uses shared memory to exchange
> > the data between kernel and secure monitor.
> > 
> > Signed-off-by: Dongjin Yang <dj76.yang@...sung.com>
> > ---
> >  .../bindings/firmware/samsung,smccc-svc.yaml       | 31 ++++++++++++++++++++++
> >  MAINTAINERS                                        |  1 +
> >  2 files changed, 32 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml b/Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml
> > new file mode 100644
> > index 000000000000..427c42a6cd75
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml
> > @@ -0,0 +1,31 @@
> > +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> > +%YAML 1.2
> > +---
> > +$id: https://protect2.fireeye.com/v1/url?k=c747301e-a63ad862-c746bb51-74fe485cc33c-a6f2ff257e059cb8&q=1&e=90225601-1202-479c-b95c-fc00645c40ab&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Ffirmware%2Fsamsung%2Csmccc-svc.yaml%23
> > +$schema: https://protect2.fireeye.com/v1/url?k=ec4217dc-8d3fffa0-ec439c93-74fe485cc33c-3c5eca7d394c9eea&q=1&e=90225601-1202-479c-b95c-fc00645c40ab&u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
> > +
> > +title: Samsung Secure Monitor call service
> > +
> > +maintainers:
> > +  - Jesper Nilsson <jesper.nilsson@...s.com>
> > +
> > +description: |
> > +  The file documents device tree bindings of Samsung secure monitor
> > +  call service.
> > +
> > +properties:
> > +  compatible:
> 
> Please add SoC comaptible followed by generic samsung,smccc-svc (so you
> need items with an enum and const).
> 

This patch is for artpec8 soc product. I will add that.

> > +    const: samsung,smccc-svc
> > +
> > +required:
> > +  - compatible
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +
> 
> No need for blank line.
> 
> > +    samsung-svc {
> 
> Generic node names, e.g. smc.
> 
> > +        compatible = "samsung,smccc-svc";
> > +    };
> > +...
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 20133dcd8ce9..6763746c349f 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -1862,6 +1862,7 @@ M:        Jesper Nilsson <jesper.nilsson@...s.com>
> >  M:        Lars Persson <lars.persson@...s.com>
> >  L:        linux-arm-kernel@...s.com
> >  S:        Maintained
> > +F:        Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml
> 
> Does not look related to Artpec. Shouldn't this be under Samsung Exynos?

This patch is for artpec8 soc. 

> 
> >  F:        Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
> >  F:        arch/arm/boot/dts/artpec6*
> >  F:        arch/arm/mach-artpec
> 
> 
> Best regards,
> Krzysztof