linux-kernel - [PATCH v3 2/6] dt-bindings: firmware: add i.MX95 SCMI Extension protocol

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Message-Id: <20240412-imx95-bbm-misc-v2-v3-2-4380a4070980@nxp.com>
Date: Fri, 12 Apr 2024 18:47:08 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: Jonathan Corbet <corbet@....net>, 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>, Sudeep Holla <sudeep.holla@....com>, 
 Cristian Marussi <cristian.marussi@....com>
Cc: Peng Fan <peng.fan@....com>, linux-doc@...r.kernel.org, 
 linux-kernel@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: [PATCH v3 2/6] dt-bindings: firmware: add i.MX95 SCMI Extension
 protocol

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

Add i.MX SCMI Extension protocols bindings for:
 - Battery Backed Module(BBM) Protocol
   This contains persistent storage (GPR), an RTC, and the ON/OFF button.
   The protocol can also provide access to similar functions implemented via
   external board components.
 - MISC Protocol.
   This includes controls that are misc settings/actions that must be exposed
   from the SM to agents. They are device specific and are usually define to
   access bit fields in various mix block control modules, IOMUX_GPR, and other
   GPR/CSR owned by the SM.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 .../devicetree/bindings/firmware/arm,scmi.yaml     | 21 +++++++++++++
 .../bindings/firmware/nxp,imx95-scmi.yaml          | 36 ++++++++++++++++++++++
 2 files changed, 57 insertions(+)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 93fb7d05f849..fa2cc910c485 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -247,6 +247,27 @@ properties:
       reg:
         const: 0x18
 
+  protocol@81:
+    $ref: '#/$defs/protocol-node'
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        const: 0x81
+
+  protocol@84:
+    type: object
+    anyOf:
+      - allOf:
+          - $ref: /schemas/firmware/nxp,imx95-scmi.yaml
+          - $ref: '#/$defs/protocol-node'
+
+    unevaluatedProperties: false
+
+    properties:
+      reg:
+        const: 0x84
+
 additionalProperties: false
 
 $defs:
diff --git a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml
new file mode 100644
index 000000000000..b84c4a53b78a
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi.yaml
@@ -0,0 +1,36 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2024 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/nxp,imx95-scmi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX95 System Control and Management Interface(SCMI) Vendor Protocols Extension
+
+maintainers:
+  - Peng Fan <peng.fan@....com>
+
+properties:
+  nxp,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
+    minItems: 1
+    maxItems: 32
+    $ref: /schemas/types.yaml#/definitions/uint32-matrix
+
+if:
+  properties:
+    reg:
+      const: 0x84
+then:
+  properties:
+    nxp,wakeup-sources: true
+else:
+  properties:
+    nxp,wakeup-sources: false
+
+additionalProperties: true

-- 
2.37.1