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

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

[Dongjin Yang]

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@samsung.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
+---
+$id: http://devicetree.org/schemas/firmware/samsung,smccc-svc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung Secure Monitor call service
+
+maintainers:
+  - Jesper Nilsson <jesper.nilsson@axis.com>
+
+description: |
+  The file documents device tree bindings of Samsung secure monitor
+  call service.
+
+properties:
+  compatible:
+    const: samsung,smccc-svc
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+
+    samsung-svc {
+        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@axis.com>
 M:	Lars Persson <lars.persson@axis.com>
 L:	linux-arm-kernel@axis.com
 S:	Maintained
+F:	Documentation/devicetree/bindings/firmware/samsung,smccc-svc.yaml
 F:	Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
 F:	arch/arm/boot/dts/artpec6*
 F:	arch/arm/mach-artpec
-- 
2.9.5

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

[Krzysztof Kozlowski]

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@samsung.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
> +---
> +$id: http://devicetree.org/schemas/firmware/samsung,smccc-svc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Samsung Secure Monitor call service
> +
> +maintainers:
> +  - Jesper Nilsson <jesper.nilsson@axis.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).

> +    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@axis.com>
>  M:	Lars Persson <lars.persson@axis.com>
>  L:	linux-arm-kernel@axis.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?

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


Best regards,
Krzysztof

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

[Dongjin Yang]

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@samsung.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@axis.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@axis.com>
> >  M:        Lars Persson <lars.persson@axis.com>
> >  L:        linux-arm-kernel@axis.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