1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/bus/st,stm32-etzpc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: STM32 Extended TrustZone protection controller
8
9 description: |
10 The ETZPC configures TrustZone security in a SoC having bus masters and
11 devices with programmable-security attributes (securable resources).
12
13 maintainers:
14 - Gatien Chevallier <gatien.chevallier@foss.st.com>
15
16 select:
17 properties:
18 compatible:
19 contains:
20 const: st,stm32-etzpc
21 required:
22 - compatible
23
24 properties:
25 compatible:
26 items:
27 - const: st,stm32-etzpc
28 - const: simple-bus
29
30 reg:
31 maxItems: 1
32
33 "#address-cells":
34 const: 1
35
36 "#size-cells":
37 const: 1
38
39 ranges: true
40
41 "#access-controller-cells":
42 const: 1
43 description:
44 Contains the firewall ID associated to the peripheral.
45
46 patternProperties:
47 "^.*@[0-9a-f]+$":
48 description: Peripherals
49 type: object
50
51 additionalProperties: true
52
53 required:
54 - access-controllers
55
56 required:
57 - compatible
58 - reg
59 - "#address-cells"
60 - "#size-cells"
61 - "#access-controller-cells"
62 - ranges
63
64 additionalProperties: false
65
66 examples:
67 - |
68 // In this example, the usart2 device refers to rifsc as its access
69 // controller.
70 // Access rights are verified before creating devices.
71
72 #include <dt-bindings/interrupt-controller/arm-gic.h>
73 #include <dt-bindings/clock/stm32mp13-clks.h>
74 #include <dt-bindings/reset/stm32mp13-resets.h>
75
76 etzpc: bus@5c007000 {
77 compatible = "st,stm32-etzpc", "simple-bus";
78 reg = <0x5c007000 0x400>;
79 #address-cells = <1>;
80 #size-cells = <1>;
81 #access-controller-cells = <1>;
82 ranges;
83
84 usart2: serial@4c001000 {
85 compatible = "st,stm32h7-uart";
86 reg = <0x4c001000 0x400>;
87 interrupts-extended = <&exti 27 IRQ_TYPE_LEVEL_HIGH>;
88 clocks = <&rcc USART2_K>;
89 resets = <&rcc USART2_R>;
90 wakeup-source;
91 dmas = <&dmamux1 43 0x400 0x5>,
92 <&dmamux1 44 0x400 0x1>;
93 dma-names = "rx", "tx";
94 access-controllers = <&etzpc 17>;
95 };
96 };
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