linux-kernel - [PATCH v4 2/7] dt-bindings: firmware: Add i.MX95 SCMI LMM and CPU protocol

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Message-Id: <20250408-imx-lmm-cpu-v4-2-4c5f4a456e49@nxp.com>
Date: Tue, 08 Apr 2025 16:44:26 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>, 
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: Dan Carpenter <dan.carpenter@...aro.org>, linux-kernel@...r.kernel.org, 
 arm-scmi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
 imx@...ts.linux.dev, devicetree@...r.kernel.org, 
 Peng Fan <peng.fan@....com>
Subject: [PATCH v4 2/7] dt-bindings: firmware: Add i.MX95 SCMI LMM and CPU
 protocol

From: Peng Fan <peng.fan@....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).

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Signed-off-by: Peng Fan <peng.fan@....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@....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