[PATCH v3 2/7] dt-bindings: firmware: Add i.MX95 SCMI LMM and CPU protocol

Peng Fan (OSS)
2025-03-03T02:54:37Z

From: Peng Fan <peng.fan@nxp.com>

Add i.MX SCMI Extension protocols bindings for:
- Logic Machine Management(LMM) Protocol
intended for boot, shutdown, and reset of other logical machines (LM).
It is usually used to allow one LM to manager another used as an offload
or accelerator engine..
- CPU Protocol.
allows an agent to start or stop a CPU. It is used to manage auxiliary
CPUs in an LM (e.g. additional cores in an AP cluster).

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
.../bindings/firmware/nxp,imx95-scmi.yaml | 23 ++++++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml
index 1a95010a546b14b1d3d97aa990c0305a551f2620..2bda2e0e13693f12816762137e07dc308d2c49e4 100644
--- a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml
@@ -11,6 +11,18 @@ maintainers:
- Peng Fan <peng.fan@nxp.com>

properties:
+ protocol@80:
+ description:
+ SCMI LMM protocol which is for boot, shutdown, and reset of other logical
+ machines (LM). It is usually used to allow one LM to manage another used
+ as an offload or accelerator engine.
+ $ref: '/schemas/firmware/arm,scmi.yaml#/$defs/protocol-node'
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ const: 0x80
+
protocol@81:
$ref: '/schemas/firmware/arm,scmi.yaml#/$defs/protocol-node'
unevaluatedProperties: false
@@ -19,6 +31,17 @@ properties:
reg:
const: 0x81

+ protocol@82:
+ description:
+ SCMI CPU Protocol which allows an agent to start or stop a CPU. It is
+ used to manage auxiliary CPUs in a LM.
+ $ref: '/schemas/firmware/arm,scmi.yaml#/$defs/protocol-node'
+ unevaluatedProperties: false
+
+ properties:
+ reg:
+ const: 0x82
+
protocol@84:
$ref: '/schemas/firmware/arm,scmi.yaml#/$defs/protocol-node'
unevaluatedProperties: false

--
2.37.1