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diff --git a/Documentation/devicetree/bindings/arm/mstar/mstar,l3bridge.yaml b/Documentation/devicetree/bindings/arm/mstar/mstar,l3bridge.yaml
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index 000000000..6816bd68f
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+++ b/Documentation/devicetree/bindings/arm/mstar/mstar,l3bridge.yaml
@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2020 thingy.jp.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/arm/mstar/mstar,l3bridge.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MStar/SigmaStar Armv7 SoC l3bridge
+
+maintainers:
+  - Daniel Palmer <daniel@thingy.jp>
+
+description: |
+  MStar/SigmaStar's Armv7 SoCs have a pipeline in the interface
+  between the CPU and memory. This means that before DMA capable
+  devices are allowed to run the pipeline must be flushed to ensure
+  everything is in memory.
+
+  The l3bridge region contains registers that allow such a flush
+  to be triggered.
+
+  This node is used by the platform code to find where the registers
+  are and install a barrier that triggers the required pipeline flush.
+
+properties:
+  compatible:
+    items:
+      - const: mstar,l3bridge
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    l3bridge: l3bridge@1f204400 {
+        compatible = "mstar,l3bridge";
+        reg = <0x1f204400 0x200>;
+    };
diff --git a/Documentation/devicetree/bindings/arm/mstar/mstar.yaml b/Documentation/devicetree/bindings/arm/mstar/mstar.yaml
new file mode 100644
index 000000000..7c787405b
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+++ b/Documentation/devicetree/bindings/arm/mstar/mstar.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/mstar/mstar.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MStar platforms device tree bindings
+
+maintainers:
+  - Daniel Palmer <daniel@thingy.jp>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: infinity boards
+        items:
+          - enum:
+              - thingyjp,breadbee-crust # thingy.jp BreadBee Crust
+          - const: mstar,infinity
+
+      - description: infinity3 boards
+        items:
+          - enum:
+              - thingyjp,breadbee # thingy.jp BreadBee
+          - const: mstar,infinity3
+
+      - description: mercury5 boards
+        items:
+          - enum:
+              - 70mai,midrived08 # 70mai midrive d08
+          - const: mstar,mercury5
+
+additionalProperties: true