3 files changed, 68 insertions, 10 deletions
diff --git a/dts/Bindings/arm/stm32/mlahb.txt b/dts/Bindings/arm/stm32/mlahb.txt
new file mode 100644
index 0000000000..25307aa1eb
--- /dev/null
+++ b/dts/Bindings/arm/stm32/mlahb.txt
@@ -0,0 +1,37 @@
+ML-AHB interconnect bindings
+
+These bindings describe the STM32 SoCs ML-AHB interconnect bus which connects
+a Cortex-M subsystem with dedicated memories.
+The MCU SRAM and RETRAM memory parts can be accessed through different addresses
+(see "RAM aliases" in [1]) using different buses (see [2]) : balancing the
+Cortex-M firmware accesses among those ports allows to tune the system
+performance.
+
+[1]: https://www.st.com/resource/en/reference_manual/dm00327659.pdf
+[2]: https://wiki.st.com/stm32mpu/wiki/STM32MP15_RAM_mapping
+
+Required properties:
+- compatible: should be "simple-bus"
+- dma-ranges: describes memory addresses translation between the local CPU and
+	   the remote Cortex-M processor. Each memory region, is declared with
+	   3 parameters:
+		 - param 1: device base address (Cortex-M processor address)
+		 - param 2: physical base address (local CPU address)
+		 - param 3: size of the memory region.
+
+The Cortex-M remote processor accessed via the mlahb interconnect is described
+by a child node.
+
+Example:
+mlahb {
+	compatible = "simple-bus";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	dma-ranges = <0x00000000 0x38000000 0x10000>,
+		     <0x10000000 0x10000000 0x60000>,
+		     <0x30000000 0x30000000 0x60000>;
+
+	m4_rproc: m4@10000000 {
+		...
+	};
+};
diff --git a/dts/Bindings/arm/stm32/stm32.txt b/dts/Bindings/arm/stm32/stm32.txt
deleted file mode 100644
index 6808ed9ddf..0000000000
--- a/dts/Bindings/arm/stm32/stm32.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-STMicroelectronics STM32 Platforms Device Tree Bindings
-
-Each device tree must specify which STM32 SoC it uses,
-using one of the following compatible strings:
-
-  st,stm32f429
-  st,stm32f469
-  st,stm32f746
-  st,stm32h743
-  st,stm32mp157
diff --git a/dts/Bindings/arm/stm32/stm32.yaml b/dts/Bindings/arm/stm32/stm32.yaml
new file mode 100644
index 0000000000..4d194f1eb0
--- /dev/null
+++ b/dts/Bindings/arm/stm32/stm32.yaml
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/stm32/stm32.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: STMicroelectronics STM32 Platforms Device Tree Bindings
+
+maintainers:
+  - Alexandre Torgue <alexandre.torgue@st.com>
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: st,stm32f429
+
+      - items:
+          - const: st,stm32f469
+
+      - items:
+          - const: st,stm32f746
+
+      - items:
+          - const: st,stm32h743
+
+      - items:
+          - enum:
+              - arrow,stm32mp157a-avenger96 # Avenger96
+          - const: st,stm32mp157
+...