[PATCH v4 1/6] dt-bindings: bus: add documentation for the IMX AIPSTZ bridge

[Laurentiu Mihalcea]

From: Laurentiu Mihalcea <laurentiu.mihalcea@xxxxxxx>

Add documentation for IMX AIPSTZ bridge.

Co-developed-by: Daniel Baluta <daniel.baluta@xxxxxxx>
Signed-off-by: Daniel Baluta <daniel.baluta@xxxxxxx>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@xxxxxxx>
---
 .../bindings/bus/fsl,imx8mp-aipstz.yaml       | 104 ++++++++++++++++++
 include/dt-bindings/bus/imx-aipstz.h          |  25 +++++
 2 files changed, 129 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
 create mode 100644 include/dt-bindings/bus/imx-aipstz.h

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..13b7fb39d6ac
--- /dev/null
+++ b/Documentation/devicetree/bindings/bus/fsl,imx8mp-aipstz.yaml
@@ -0,0 +1,104 @@
+# 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@xxxxxxx>
+
+properties:
+  compatible:
+    const: fsl,imx8mp-aipstz
+
+  reg:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+  "#access-controller-cells":
+    const: 3
+    description:
+      The first cell consists of the consumer type (master or peripheral).
+      The second cell consists of the consumer ID.
+      The third cell consists of the configuration value.
+
+  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:
+  - |
+    #include <dt-bindings/clock/imx8mp-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    bus@30df0000 {
+        compatible = "fsl,imx8mp-aipstz";
+        reg = <0x30df0000 0x10000>;
+        power-domains = <&pgc_audio>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        #access-controller-cells = <3>;
+        ranges = <0x30c00000 0x30c00000 0x400000>;
+
+        dma-controller@30e00000 {
+            compatible = "fsl,imx8mp-sdma", "fsl,imx8mq-sdma";
+            reg = <0x30e00000 0x10000>;
+            #dma-cells = <3>;
+            clocks = <&audio_blk_ctrl IMX8MP_CLK_AUDIOMIX_SDMA3_ROOT>,
+                     <&clk IMX8MP_CLK_AUDIO_ROOT>;
+            clock-names = "ipg", "ahb";
+            interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
+            fsl,sdma-ram-script-name = "imx/sdma/sdma-imx7d.bin";
+        };
+    };
diff --git a/include/dt-bindings/bus/imx-aipstz.h b/include/dt-bindings/bus/imx-aipstz.h
new file mode 100644
index 000000000000..b81b4654e00f
--- /dev/null
+++ b/include/dt-bindings/bus/imx-aipstz.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright 2025 NXP
+ */
+
+#ifndef _DT_BINDINGS_BUS_IMX_AIPSTZ_H
+#define _DT_BINDINGS_BUS_IMX_AIPSTZ_H
+
+/* consumer type - master or peripheral */
+#define IMX_AIPSTZ_MASTER 0x0
+#define IMX_AIPSTZ_PERIPH 0x1
+
+/* master configuration options */
+#define IMX_AIPSTZ_MPL 0x1
+#define IMX_AIPSTZ_MTW 0x2
+#define IMX_AIPSTZ_MTR 0x4
+#define IMX_AIPSTZ_MBW 0x8
+
+/* peripheral configuration options */
+#define IMX_AIPSTZ_TP 0x1
+#define IMX_AIPSTZ_WP 0x2
+#define IMX_AIPSTZ_SP 0x4
+#define IMX_AIPSTZ_BW 0x8
+
+#endif /* _DT_BINDINGS_BUS_IMX_AIPSTZ_H */
-- 
2.34.1