[PATCH 1/2] dt-bindings: arm: airoha: Add the pbus-csr node for EN7581 SoC

[Lorenzo Bianconi]

This patch adds the pbus-csr document bindings for EN7581 SoC.
The airoha pbus-csr block provides a configuration interface for the
PBUS controller used to detect if a given address is on PCIE0, PCIE1 or
PCIE2.

Signed-off-by: Lorenzo Bianconi <lorenzo at kernel.org>
---
 .../bindings/arm/airoha,en7581-pbus-csr.yaml       | 41 ++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/Documentation/devicetree/bindings/arm/airoha,en7581-pbus-csr.yaml b/Documentation/devicetree/bindings/arm/airoha,en7581-pbus-csr.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..80b237e195cd3607645efe3fda1eb6152134481c
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/airoha,en7581-pbus-csr.yaml
@@ -0,0 +1,41 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/airoha,en7581-pbus-csr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha Pbus CSR Controller for EN7581 SoC
+
+maintainers:
+  - Lorenzo Bianconi <lorenzo at kernel.org>
+
+description:
+  The airoha pbus-csr block provides a configuration interface for the PBUS
+  controller used to detect if a given address is on PCIE0, PCIE1 or PCIE2.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - airoha,en7581-pbus-csr
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+      #address-cells = <2>;
+      #size-cells = <2>;
+      syscon at 1fbe3400 {
+        compatible = "airoha,en7581-pbus-csr", "syscon";
+        reg = <0x0 0x1fbe3400 0x0 0xff>;
+      };
+    };

-- 
2.48.0