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

[Tinghan Shen]

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 at mediatek.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