linux-kernel - [PATCH v20 1/6] dt-bindings: firmware: Add TEE remoteproc service binding

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Message-ID: <20251217153917.3998544-2-arnaud.pouliquen@foss.st.com>
Date: Wed, 17 Dec 2025 16:39:12 +0100
From: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
To: Bjorn Andersson <andersson@...nel.org>,
        Mathieu Poirier
	<mathieu.poirier@...aro.org>,
        Jens Wiklander <jens.wiklander@...aro.org>,
        "Rob Herring" <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        "Conor Dooley" <conor+dt@...nel.org>,
        Sumit Garg <sumit.garg@...nel.org>
CC: <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <op-tee@...ts.trustedfirmware.org>, <devicetree@...r.kernel.org>,
        Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
Subject: [PATCH v20 1/6] dt-bindings: firmware: Add TEE remoteproc service binding

Add a device tree binding for the TEE-based remote processor control
service implemented as an OP-TEE Trusted Application identified by
UUID 80a4c275-0a47-4905-8285-1486a9771a08.

The TEE service node is a child of the "linaro,optee-tz" firmware node and
acts as a container for remoteproc devices that are controlled via TEE.

In addition, the "linaro,optee-tz" binding is updated to specify the
'#address-cells' and '#size-cells' values used for child TEE service
nodes.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
---
 .../arm/firmware/linaro,optee-tz.yaml         |  6 +++
 .../bindings/remoteproc/remoteproc-tee.yaml   | 47 +++++++++++++++++++
 2 files changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml

diff --git a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
index 5d033570b57b..ab69eecba9ad 100644
--- a/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
+++ b/Documentation/devicetree/bindings/arm/firmware/linaro,optee-tz.yaml
@@ -41,6 +41,12 @@ properties:
       HVC #0, register assignments
       register assignments are specified in drivers/tee/optee/optee_smc.h
 
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
 required:
   - compatible
   - method
diff --git a/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml b/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml
new file mode 100644
index 000000000000..083ecf1f38cf
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/remoteproc-tee.yaml
@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/remoteproc/remoteproc-tee.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TEE Remote Processor Control Service (UUID 80a4c275-0a47-4905-8285-1486a9771a08)
+
+maintainers:
+  - Arnaud Pouliquen <arnaud.pouliquen@...s.st.com>
+
+description: |
+  Node describing a TEE-based remote processor control service implemented as
+  a Trusted Application identified by UUID 80a4c275-0a47-4905-8285-1486a9771a08.
+
+  It is a child of the OP-TEE firmware node ("linaro,optee-tz") and acts as a
+  container for child remoteproc devices (for example, the STM32MP15 M4 core
+  described by "st,stm32mp1-tee").
+
+properties:
+  compatible:
+    const: rproc-service-80a4c275-0a47-4905-8285-1486a9771a08
+
+  reg:
+    description: |
+      Logical identifier of the TEE remoteproc service instance.
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^[a-zA-Z0-9,._-]+@[0-9a-fA-F]+$":
+    type: object
+
+
+required:
+  - compatible
+  - reg
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+...
-- 
2.43.0