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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: STM32 Extended TrustZone protection controller
description: |
The ETZPC configures TrustZone security in a SoC having bus masters and
devices with programmable-security attributes (securable resources).
maintainers:
- Gatien Chevallier <gatien.chevallier@foss.st.com>
select:
properties:
compatible:
contains:
const: st,stm32-etzpc
required:
- compatible
properties:
compatible:
items:
- const: st,stm32-etzpc
- const: simple-bus
reg:
maxItems: 1
"#address-cells":
const: 1
"#size-cells":
const: 1
ranges: true
"#access-controller-cells":
const: 1
description:
Contains the firewall ID associated to the peripheral.
patternProperties:
"^.*@[0-9a-f]+$":
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.
// 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", "simple-bus";
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>;
};
};
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