[PATCH v7 1/6] dt-bindings: bus: document the IMX AIPSTZ bridge

Laurentiu Mihalcea
2025-06-10T16:02:24Z

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

Add documentation for IMX AIPSTZ bridge.

Co-developed-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: Laurentiu Mihalcea <laurentiu.mihalcea@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
---
.../bindings/bus/fsl,imx8mp-aipstz.yaml | 104 ++++++++++++++++++
1 file changed, 104 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..993293ebc4d3
--- /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@nxp.com>
+
+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:
+ First cell - consumer ID
+ Second cell - consumer type (master or peripheral)
+ Third cell - 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>;
+ ranges = <0x30c00000 0x30c00000 0x400000>;
+ power-domains = <&pgc_audio>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ #access-controller-cells = <3>;
+
+ 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";
+ };
+ };
--
2.34.1