linux-kernel - [PATCH v1 01/15] dt-binding: remoteproc: mediatek: Support dual-core SCP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 1 Jun 2022 19:21:47 +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 <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Benson Leung <bleung@...omium.org>,
        Guenter Roeck <groeck@...omium.org>,
        Daisuke Nojiri <dnojiri@...omium.org>,
        Sebastian Reichel <sebastian.reichel@...labora.com>,
        "Dustin L. Howett" <dustin@...ett.net>,
        Tzung-Bi Shih <tzungbi@...nel.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>,
        Brian Norris <briannorris@...omium.org>
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 v1 01/15] dt-binding: remoteproc: mediatek: Support dual-core SCP

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

Add a new property to identify each core and helps to find drivers
through device tree API to cooperate with each other, e.g. boot flow and
watchdog timeout flow.

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      | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
index eec3b9c4c713..b181786d9575 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 +58,16 @@ properties:
   memory-region:
     maxItems: 1
 
+  mediatek,scp-core:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      The property value is a list with 2 items, a core id and a phandle
+      to the sibling SCP node. The core id represents the id of the dts node contains
+      this property. The valid values of core id are 0 and 1 for dual-core SCP.
+      The phandle of sibling SCP node is used to find the register settings,
+      trigger core dependent callback, and invoke rproc API.
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -115,6 +126,7 @@ examples:
         reg-names = "sram", "cfg", "l1tcm";
         clocks = <&infracfg CLK_INFRA_SCPSYS>;
         clock-names = "main";
+        mediatek,scp-core = <0 &scp_dual>;
 
         cros_ec {
             mediatek,rpmsg-name = "cros-ec-rpmsg";
-- 
2.18.0