[PATCH RFC v2 04/10] dt-bindings: firmware: add RISC-V RPMI TEE transport

[Amirreza Zarrabi]

Add a binding for the RPMI TEE service group carried over an SBI MPXY
mailbox channel. The transport uses this channel to discover TEE
endpoints and their services.

Require a single mailbox reference. Notification interrupt information
is obtained from firmware through TEE_PROBE_FEATURES rather than an
interrupt property in the TEE transport node.

Signed-off-by: Amirreza Zarrabi <amirreza.zarrabi@xxxxxxxxxxxxxxxx>
---
 .../bindings/firmware/riscv,rpmi-tee.yaml          | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/riscv,rpmi-tee.yaml b/Documentation/devicetree/bindings/firmware/riscv,rpmi-tee.yaml
new file mode 100644
index 000000000000..b7bbe8893e56
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/riscv,rpmi-tee.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/riscv,rpmi-tee.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: RISC-V RPMI TEE service group transport
+
+maintainers:
+  - Amirreza Zarrabi <amirreza.zarrabi@xxxxxxxxxxxxxxxx>
+
+description: |
+  The RISC-V Platform Management Interface TEE service group is carried over
+  an SBI MPXY RPMI mailbox channel. The transport discovers TEE services and
+  creates child devices for their endpoint and UUID pairs.
+
+properties:
+  compatible:
+    const: riscv,rpmi-tee
+
+  mboxes:
+    maxItems: 1
+
+required:
+  - compatible
+  - mboxes
+
+additionalProperties: false
+
+examples:
+  - |
+    rpmi-tee {
+        compatible = "riscv,rpmi-tee";
+        mboxes = <&mpxy_mbox 0x3000 0x0>;
+    };

-- 
2.34.1