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Date:   Fri, 12 Apr 2019 15:18:45 +0800
From:   Pi-Hsun Shih <>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Pi-Hsun Shih <>, Erin Lo <>,
        Rob Herring <>,
        Ohad Ben-Cohen <>,
        Bjorn Andersson <>,
        Rob Herring <>,
        Mark Rutland <>,
        Matthias Brugger <>, (open list:REMOTE PROCESSOR
        DEVICE TREE BINDINGS), (moderated list:ARM/Mediatek SoC
        support), (moderated list:ARM/Mediatek SoC
        support), (open list)
Subject: [PATCH v8 1/7] dt-bindings: Add a binding for Mediatek SCP

From: Erin Lo <>

Add a DT binding documentation of SCP for the
MT8183 SoC from Mediatek.

Signed-off-by: Erin Lo <>
Signed-off-by: Pi-Hsun Shih <>
Reviewed-by: Rob Herring <>
Changes from v7:
 - No change.

Changes from v6:
 - No change.

Changes from v5:
 - Remove dependency on CONFIG_RPMSG_MTK_SCP.

Changes from v4:
 - Add detail of more properties.
 - Document the usage of mtk,rpmsg-name in subnode from the new design.

Changes from v3:
 - No change.

Changes from v2:
 - No change. I realized that for this patch series, there's no need to
   add anything under the mt8183-scp node (neither the mt8183-rpmsg or
   the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added
   directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically
   created by SCP name service.

Changes from v1:
 - No change.
 .../bindings/remoteproc/mtk,scp.txt           | 36 +++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
new file mode 100644
index 000000000000..3ba668bab14b
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
@@ -0,0 +1,36 @@
+Mediatek SCP Bindings
+This binding provides support for ARM Cortex M4 Co-processor found on some
+Mediatek SoCs.
+Required properties:
+- compatible		Should be "mediatek,mt8183-scp"
+- reg			Should contain the address ranges for the two memory
+			regions, SRAM and CFG.
+- reg-names		Contains the corresponding names for the two memory
+			regions. These should be named "sram" & "cfg".
+- clocks		Clock for co-processor (See: ../clock/clock-bindings.txt)
+- clock-names		Contains the corresponding name for the clock. This
+			should be named "main".
+Subnodes of the SCP represent rpmsg devices. The names of the devices are not
+important. The properties of these nodes are defined by the individual bindings
+for the rpmsg devices - but must contain the following property:
+- mtk,rpmsg-name	Contains the name for the rpmsg device. Used to match
+			the subnode to rpmsg device announced by SCP.
+	scp: scp@...00000 {
+		compatible = "mediatek,mt8183-scp";
+		reg = <0 0x10500000 0 0x80000>,
+		      <0 0x105c0000 0 0x5000>;
+		reg-names = "sram", "cfg";
+		clocks = <&infracfg CLK_INFRA_SCPSYS>;
+		clock-names = "main";
+	};

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