linux-kernel - [RFC PATCH 2/3] arm64: dts: s32g2: add SCMI support

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Date:   Mon,  7 Feb 2022 21:24:43 +0800
From:   Chester Lin <clin@...e.com>
To:     Andreas Färber <afaerber@...e.de>,
        Matthias Brugger <mbrugger@...e.com>,
        Ciprian Marian Costea <ciprianmarian.costea@....com>,
        Ghennadi Procopciuc <Ghennadi.Procopciuc@....com>, s32@....com
CC:     Rob Herring <robh+dt@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Radu Nicolae Pirea <radu-nicolae.pirea@....nxp.com>,
        "Ivan T . Ivanov" <iivanov@...e.de>,
        "Lee, Chun-Yi" <jlee@...e.com>, Chester Lin <clin@...e.com>
Subject: [RFC PATCH 2/3] arm64: dts: s32g2: add SCMI support

Add a scmi node to support SCMI protocol 0x14 on NXP S32G2 platforms.

Signed-off-by: Chester Lin <clin@...e.com>
---
 arch/arm64/boot/dts/freescale/s32g2.dtsi | 26 ++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/s32g2.dtsi b/arch/arm64/boot/dts/freescale/s32g2.dtsi
index 59ea8a25aa4c..34652d36a9f1 100644
--- a/arch/arm64/boot/dts/freescale/s32g2.dtsi
+++ b/arch/arm64/boot/dts/freescale/s32g2.dtsi
@@ -72,11 +72,37 @@ timer {
 			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
 	};
 
+	reserved-memory {
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		scmi_shmem: memory@...00000 {
+			compatible = "arm,scmi-shmem";
+			reg = <0 0xd0000000 0 0x400000>; /* 4 MiB */
+			no-map;
+		};
+	};
+
 	firmware {
 		psci {
 			compatible = "arm,psci-1.0";
 			method = "smc";
 		};
+
+		scmi {
+			compatible = "arm,scmi-smc";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			shmem = <&scmi_shmem>;
+			arm,smc-id = <0xc20000fe>;
+
+			scmi_clks: protocol@14 {
+				reg = <0x14>;
+				#clock-cells = <1>;
+			};
+		};
+
 	};
 
 	soc {
-- 
2.33.1