linux-kernel - [PATCH v2 2/6] dt-bindings: firmware: add i.MX SCMI Extension protocol

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Message-Id: <20240405-imx95-bbm-misc-v2-v2-2-9fc9186856c2@nxp.com>
Date: Fri, 05 Apr 2024 20:39:24 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>
Cc: Peng Fan <peng.fan@....com>, devicetree@...r.kernel.org, 
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org, 
 linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/6] dt-bindings: firmware: add i.MX SCMI Extension
 protocol

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

Add i.MX SCMI Extension protocols bindings for:
 - Battery Backed Secure Module(BBSM)
 - MISC settings such as General Purpose Registers settings.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 .../devicetree/bindings/firmware/imx,scmi.yaml     | 80 ++++++++++++++++++++++
 1 file changed, 80 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/imx,scmi.yaml b/Documentation/devicetree/bindings/firmware/imx,scmi.yaml
new file mode 100644
index 000000000000..7ee19a661d83
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/imx,scmi.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2024 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/imx,scmi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX System Control and Management Interface(SCMI) Vendor Protocols Extension
+
+maintainers:
+  - Peng Fan <peng.fan@....com>
+
+allOf:
+  - $ref: arm,scmi.yaml#
+
+properties:
+  protocol@81:
+    $ref: 'arm,scmi.yaml#/$defs/protocol-node'
+    unevaluatedProperties: false
+    description:
+      The BBM Protocol is for managing Battery Backed Secure Module (BBSM) RTC
+      and the ON/OFF Key
+
+    properties:
+      reg:
+        const: 0x81
+
+    required:
+      - reg
+
+  protocol@84:
+    $ref: 'arm,scmi.yaml#/$defs/protocol-node'
+    unevaluatedProperties: false
+    description:
+      The MISC Protocol is for managing SoC Misc settings, such as GPR settings
+
+    properties:
+      reg:
+        const: 0x84
+
+      wakeup-sources:
+        description:
+          Each entry consists of 2 integers, represents the source and electric signal edge
+        items:
+          items:
+            - description: the wakeup source
+            - description: the wakeup electric signal edge
+        $ref: /schemas/types.yaml#/definitions/uint32-matrix
+
+    required:
+      - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    firmware {
+        scmi {
+            compatible = "arm,scmi";
+            mboxes = <&mu2 5 0>, <&mu2 3 0>, <&mu2 3 1>;
+            shmem = <&scmi_buf0>, <&scmi_buf1>;
+
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            protocol@81 {
+                reg = <0x81>;
+            };
+
+            protocol@84 {
+                reg = <0x84>;
+                wakeup-sources = <0x8000 1
+                                  0x8001 1
+                                  0x8002 1
+                                  0x8003 1
+                                  0x8004 1>;
+            };
+         };
+    };
+...

-- 
2.37.1