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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/bus/st,stm32-etzpc.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#

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$schema: http://devicetree.org/meta-schemas/core.yaml#

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title: STM32 Extended TrustZone protection controller

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description: |

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  The ETZPC configures TrustZone security in a SoC having bus masters and

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  devices with programmable-security attributes (securable resources).

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maintainers:

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  - Gatien Chevallier <gatien.chevallier@foss.st.com>

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select:

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  properties:

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    compatible:

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      contains:

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        const: st,stm32-etzpc

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  required:

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    - compatible

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properties:

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  compatible:

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    items:

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      - const: st,stm32-etzpc

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      - const: simple-bus

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  reg:

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    maxItems: 1

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  "#address-cells":

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    const: 1

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  "#size-cells":

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    const: 1

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  ranges: true

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  "#access-controller-cells":

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    const: 1

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    description:

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      Contains the firewall ID associated to the peripheral.

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patternProperties:

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  "^.*@[0-9a-f]+$":

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    description: Peripherals

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    type: object

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    additionalProperties: true

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    required:

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      - access-controllers

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required:

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  - compatible

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  - reg

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  - "#address-cells"

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  - "#size-cells"

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  - "#access-controller-cells"

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  - ranges

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additionalProperties: false

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examples:

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  - |

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    // In this example, the usart2 device refers to rifsc as its access

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    // controller.

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    // Access rights are verified before creating devices.

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    #include <dt-bindings/interrupt-controller/arm-gic.h>

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    #include <dt-bindings/clock/stm32mp13-clks.h>

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    #include <dt-bindings/reset/stm32mp13-resets.h>

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    etzpc: bus@5c007000 {

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        compatible = "st,stm32-etzpc", "simple-bus";

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        reg = <0x5c007000 0x400>;

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        #address-cells = <1>;

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        #size-cells = <1>;

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        #access-controller-cells = <1>;

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        ranges;

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        usart2: serial@4c001000 {

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            compatible = "st,stm32h7-uart";

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            reg = <0x4c001000 0x400>;

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            interrupts-extended = <&exti 27 IRQ_TYPE_LEVEL_HIGH>;

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            clocks = <&rcc USART2_K>;

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            resets = <&rcc USART2_R>;

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            wakeup-source;

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            dmas = <&dmamux1 43 0x400 0x5>,

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                    <&dmamux1 44 0x400 0x1>;

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            dma-names = "rx", "tx";

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            access-controllers = <&etzpc 17>;

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        };

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    };

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