diff mbox series

[v8,04/13] dt-bindings: bus: document ETZPC

Message ID 20231212152356.345703-5-gatien.chevallier@foss.st.com
State Superseded
Headers show
Series Introduce STM32 Firewall framework | expand

Commit Message

Gatien CHEVALLIER Dec. 12, 2023, 3:23 p.m. UTC
Document ETZPC (Extended TrustZone protection controller). ETZPC is a
firewall controller.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
---

Changes in V6:
    	- Renamed access-controller to access-controllers
    	- Removal of access-control-provider property
    	- Removal of access-controller and access-controller-names
    	  declaration in the patternProperties field. Add
    	  additionalProperties: true in this field.

Changes in V5:
	- Renamed feature-domain* to access-control*

Changes in V2:
	- Corrected errors highlighted by Rob's robot
	- No longer define the maxItems for the "feature-domains"
	  property
	- Fix example (node name, status)
	- Declare "feature-domain-names" as an optional
	  property for child nodes
	- Fix description of "feature-domains" property
	- Reordered the properties so it matches ETZPC
	- Add missing "feature-domain-controller" property

 .../bindings/bus/st,stm32-etzpc.yaml          | 87 +++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml

Comments

Rob Herring Dec. 21, 2023, 10 p.m. UTC | #1
On Tue, Dec 12, 2023 at 04:23:47PM +0100, Gatien Chevallier wrote:
> Document ETZPC (Extended TrustZone protection controller). ETZPC is a
> firewall controller.
> 
> Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
> ---
> 
> Changes in V6:
>     	- Renamed access-controller to access-controllers
>     	- Removal of access-control-provider property
>     	- Removal of access-controller and access-controller-names
>     	  declaration in the patternProperties field. Add
>     	  additionalProperties: true in this field.
> 
> Changes in V5:
> 	- Renamed feature-domain* to access-control*
> 
> Changes in V2:
> 	- Corrected errors highlighted by Rob's robot
> 	- No longer define the maxItems for the "feature-domains"
> 	  property
> 	- Fix example (node name, status)
> 	- Declare "feature-domain-names" as an optional
> 	  property for child nodes
> 	- Fix description of "feature-domains" property
> 	- Reordered the properties so it matches ETZPC
> 	- Add missing "feature-domain-controller" property
> 
>  .../bindings/bus/st,stm32-etzpc.yaml          | 87 +++++++++++++++++++
>  1 file changed, 87 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
> new file mode 100644
> index 000000000000..9ca0ad39bc19
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
> @@ -0,0 +1,87 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: STM32 Extended TrustZone protection controller
> +
> +description: |
> +  The ETZPC configures TrustZone security in a SoC having bus masters and
> +  devices with programmable-security attributes (securable resources).
> +
> +maintainers:
> +  - Gatien Chevallier <gatien.chevallier@foss.st.com>
> +
> +properties:
> +  compatible:
> +    contains:
> +      const: st,stm32-etzpc

Same here, needs 'simple-bus'.

> +
> +  reg:
> +    maxItems: 1
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 1
> +
> +  ranges: true
> +
> +  "#access-controller-cells":
> +    const: 1
> +    description:
> +      Contains the firewall ID associated to the peripheral.
> +
> +patternProperties:
> +  "^.*@[0-9a-f]+$":
> +    description: Peripherals
> +    type: object
> +
> +    additionalProperties: true
> +
> +    required:
> +      - access-controllers
> +
> +required:
> +  - compatible
> +  - reg
> +  - "#address-cells"
> +  - "#size-cells"
> +  - "#access-controller-cells"
> +  - ranges
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    // In this example, the usart2 device refers to rifsc as its access
> +    // controller.

Looks like the comment is wrong.


> +    // Access rights are verified before creating devices.
> +
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/clock/stm32mp13-clks.h>
> +    #include <dt-bindings/reset/stm32mp13-resets.h>
> +
> +    etzpc: bus@5c007000 {
> +        compatible = "st,stm32-etzpc";
> +        reg = <0x5c007000 0x400>;
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        #access-controller-cells = <1>;
> +        ranges;
> +
> +        usart2: serial@4c001000 {
> +            compatible = "st,stm32h7-uart";
> +            reg = <0x4c001000 0x400>;
> +            interrupts-extended = <&exti 27 IRQ_TYPE_LEVEL_HIGH>;
> +            clocks = <&rcc USART2_K>;
> +            resets = <&rcc USART2_R>;
> +            wakeup-source;
> +            dmas = <&dmamux1 43 0x400 0x5>,
> +                    <&dmamux1 44 0x400 0x1>;
> +            dma-names = "rx", "tx";
> +            access-controllers = <&etzpc 17>;
> +        };
> +    };
> -- 
> 2.25.1
>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
new file mode 100644
index 000000000000..9ca0ad39bc19
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
@@ -0,0 +1,87 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STM32 Extended TrustZone protection controller
+
+description: |
+  The ETZPC configures TrustZone security in a SoC having bus masters and
+  devices with programmable-security attributes (securable resources).
+
+maintainers:
+  - Gatien Chevallier <gatien.chevallier@foss.st.com>
+
+properties:
+  compatible:
+    contains:
+      const: st,stm32-etzpc
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  ranges: true
+
+  "#access-controller-cells":
+    const: 1
+    description:
+      Contains the firewall ID associated to the peripheral.
+
+patternProperties:
+  "^.*@[0-9a-f]+$":
+    description: Peripherals
+    type: object
+
+    additionalProperties: true
+
+    required:
+      - access-controllers
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+  - "#access-controller-cells"
+  - ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    // In this example, the usart2 device refers to rifsc as its access
+    // controller.
+    // Access rights are verified before creating devices.
+
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/stm32mp13-clks.h>
+    #include <dt-bindings/reset/stm32mp13-resets.h>
+
+    etzpc: bus@5c007000 {
+        compatible = "st,stm32-etzpc";
+        reg = <0x5c007000 0x400>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        #access-controller-cells = <1>;
+        ranges;
+
+        usart2: serial@4c001000 {
+            compatible = "st,stm32h7-uart";
+            reg = <0x4c001000 0x400>;
+            interrupts-extended = <&exti 27 IRQ_TYPE_LEVEL_HIGH>;
+            clocks = <&rcc USART2_K>;
+            resets = <&rcc USART2_R>;
+            wakeup-source;
+            dmas = <&dmamux1 43 0x400 0x5>,
+                    <&dmamux1 44 0x400 0x1>;
+            dma-names = "rx", "tx";
+            access-controllers = <&etzpc 17>;
+        };
+    };