linux-kernel - [PATCH v2 1/5] dt-bindings: bus: add documentation for the IMX AIPSTZ bridge

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Message-Id: <20250226165314.34205-2-laurentiumihalcea111@gmail.com>
Date: Wed, 26 Feb 2025 11:53:10 -0500
From: Laurentiu Mihalcea <laurentiumihalcea111@...il.com>
To: Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>,
	Daniel Baluta <daniel.baluta@....com>,
	Shengjiu Wang <shengjiu.wang@....com>,
	Frank Li <Frank.li@....com>
Cc: Pengutronix Kernel Team <kernel@...gutronix.de>,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 1/5] dt-bindings: bus: add documentation for the IMX AIPSTZ bridge

From: Laurentiu Mihalcea <laurentiu.mihalcea@....com>

Add documentation for IMX AIPSTZ bridge.

Co-developed-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Daniel Baluta <daniel.baluta@....com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@....com>
---
 .../bindings/bus/fsl,imx8mp-aipstz.yaml       | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml

diff --git a/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml b/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
new file mode 100644
index 000000000000..dfcfe4a8ae74
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
@@ -0,0 +1,86 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/bus/fsl,imx8mp-aipstz.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Secure AHB to IP Slave bus (AIPSTZ) bridge
+
+description:
+  The secure AIPS bridge (AIPSTZ) acts as a bridge for AHB masters
+  issuing transactions to IP Slave peripherals. Additionally, this module
+  offers access control configurations meant to restrict which peripherals
+  a master can access.
+
+maintainers:
+  - Laurentiu Mihalcea <laurentiu.mihalcea@....com>
+
+properties:
+  compatible:
+    const: fsl,imx8mp-aipstz
+
+  reg:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  "#address-cells":
+    enum: [1, 2]
+
+  "#size-cells":
+    enum: [1, 2]
+
+  "#access-controller-cells":
+    const: 0
+
+  ranges: true
+
+# borrowed from simple-bus.yaml, no additional requirements for children
+patternProperties:
+  "@(0|[1-9a-f][0-9a-f]*)$":
+    type: object
+    additionalProperties: true
+    properties:
+      reg:
+        items:
+          minItems: 2
+          maxItems: 4
+        minItems: 1
+        maxItems: 1024
+      ranges:
+        oneOf:
+          - items:
+              minItems: 3
+              maxItems: 7
+            minItems: 1
+            maxItems: 1024
+          - $ref: /schemas/types.yaml#/definitions/flag
+    anyOf:
+      - required:
+          - reg
+      - required:
+          - ranges
+
+required:
+  - compatible
+  - reg
+  - power-domains
+  - "#address-cells"
+  - "#size-cells"
+  - "#access-controller-cells"
+  - ranges
+
+additionalProperties: false
+
+examples:
+  - |
+    bus@...f0000 {
+      compatible = "fsl,imx8mp-aipstz";
+      reg = <0x30df0000 0x10000>;
+      power-domains = <&pgc_audio>;
+      #address-cells = <1>;
+      #size-cells = <1>;
+      #access-controller-cells = <0>;
+      ranges;
+    };
-- 
2.34.1