On Fri, 27 Jan 2023 17:40:37 +0100
Gatien Chevallier [off-list ref] wrote:

Document STM32 System Bus. This bus is intended to control firewall
access for the peripherals connected to it.

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

Trivial comment on formatting.

+
+examples:
+  - |
+    // In this example, the rng1 device refers to etzpc as its domain controller.
+    // Same goes for fmc.
+    // Access rights are verified before creating devices.
+
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/stm32mp1-clks.h>
+    #include <dt-bindings/reset/stm32mp1-resets.h>
+
+    etzpc: bus@5c007000 {
+        compatible = "st,stm32mp15-sys-bus";
+        reg = <0x5c007000 0x400>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+        feature-domain-controller;
+        #feature-domain-cells = <1>;
+
+        rng1: rng@54003000 {

Odd mixture of 4 spacing and 2 spacing in this example.
I'd suggest one or the other (slight preference for 4 space indents).

+          compatible = "st,stm32-rng";
+          reg = <0x54003000 0x400>;
+          clocks = <&rcc RNG1_K>;
+          resets = <&rcc RNG1_R>;
+          feature-domains = <&etzpc 7>;
+          status = "disabled";
+        };