linux-kernel - [PATCH v2 1/9] dt-binding: remoteproc: mediatek: Support dual-core SCP

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Message-ID: <20220608083553.8697-2-tinghan.shen@mediatek.com>
Date:   Wed, 8 Jun 2022 16:35:45 +0800
From:   Tinghan Shen <tinghan.shen@...iatek.com>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        "Krzysztof Kozlowski" <krzk+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        "Guenter Roeck" <groeck@...omium.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        Daisuke Nojiri <dnojiri@...omium.org>,
        Kees Cook <keescook@...omium.org>,
        Tinghan Shen <tinghan.shen@...iatek.com>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Prashant Malani <pmalani@...omium.org>,
        Enric Balletbo i Serra <enric.balletbo@...labora.com>
CC:     <linux-remoteproc@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <chrome-platform@...ts.linux.dev>,
        <Project_Global_Chrome_Upstream_Group@...iatek.com>,
        <weishunc@...gle.com>
Subject: [PATCH v2 1/9] dt-binding: remoteproc: mediatek: Support dual-core SCP

The MT8195 SCP co-processor is a dual-core RISC-V MCU.

Add a new property to reference the sibling core and to assign
core id to SCP nodes. Also add a new compatile for the driver of
SCP 2nd core.

Signed-off-by: Tinghan Shen <tinghan.shen@...iatek.com>
---
 .../devicetree/bindings/remoteproc/mtk,scp.yaml     | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index eec3b9c4c713..4576ff9b1f2d 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -20,6 +20,7 @@ properties:
       - mediatek,mt8186-scp
       - mediatek,mt8192-scp
       - mediatek,mt8195-scp
+      - mediatek,mt8195-scp-dual
 
   reg:
     description:
@@ -57,6 +58,17 @@ properties:
   memory-region:
     maxItems: 1
 
+  mediatek,scp-core:
+    $ref: "/schemas/types.yaml#/definitions/phandle-array"
+    description:
+      Reference to the sibling SCP core. This is required to
+      enable support for dual-core SCP.
+    items:
+      - items:
+          - description: Phandle of sibling SCP node.
+          - description: Core id of this SCP node
+            enum: [0, 1]
+
 required:
   - compatible
   - reg
@@ -115,6 +127,7 @@ examples:
         reg-names = "sram", "cfg", "l1tcm";
         clocks = <&infracfg CLK_INFRA_SCPSYS>;
         clock-names = "main";
+        mediatek,scp-core = <&scp_dual 0>;
 
         cros_ec {
             mediatek,rpmsg-name = "cros-ec-rpmsg";
-- 
2.18.0