linux-kernel - [PATCH v2 2/4] arm64: dts: mediatek: add support for MT8370 SoC

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Message-Id: <20250115-dts_mt8370-genio-510-v2-2-fc9b01d08834@collabora.com>
Date: Wed, 15 Jan 2025 11:29:03 +0100
From: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Sean Wang <sean.wang@...iatek.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
 kernel@...labora.com, 
 Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
Subject: [PATCH v2 2/4] arm64: dts: mediatek: add support for MT8370 SoC

This commit adds the support of the Mediatek MT8370 SoC.
It is a less powerful variant of MT8390 SoC and their
main differences are:
- Arm Cortex-A55 cores number (4 vs 6)
- Arm Cortex-A78 core speed (2.0 GHz vs 2.2 Ghz)
- Arm Mali-G57 GPU core number (2 vs 3)

Like MT8390, MT8370 hardware register maps are identical to MT8188.

Note:
In this commit, the mt8370.dtsi does not contain the needed overrides
to support the Mali GPU (to be done in a future commit).

Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
---
 arch/arm64/boot/dts/mediatek/mt8188.dtsi |  8 ++--
 arch/arm64/boot/dts/mediatek/mt8370.dtsi | 64 ++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt8188.dtsi b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
index 338120930b819645662465fa7b3c6be6491764ff..5d78f51c6183c15018986df2c76e6fdc1f9f43b4 100644
--- a/arch/arm64/boot/dts/mediatek/mt8188.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8188.dtsi
@@ -492,7 +492,7 @@ cpu_little0_crit: trip-crit {
 			};
 
 			cooling-maps {
-				map0 {
+				cpu_little0_cooling_map0: map0 {
 					trip = <&cpu_little0_alert0>;
 					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
@@ -530,7 +530,7 @@ cpu_little1_crit: trip-crit {
 			};
 
 			cooling-maps {
-				map0 {
+				cpu_little1_cooling_map0: map0 {
 					trip = <&cpu_little1_alert0>;
 					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
@@ -568,7 +568,7 @@ cpu_little2_crit: trip-crit {
 			};
 
 			cooling-maps {
-				map0 {
+				cpu_little2_cooling_map0: map0 {
 					trip = <&cpu_little2_alert0>;
 					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
@@ -606,7 +606,7 @@ cpu_little3_crit: trip-crit {
 			};
 
 			cooling-maps {
-				map0 {
+				cpu_little3_cooling_map0: map0 {
 					trip = <&cpu_little3_alert0>;
 					cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
 							 <&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
diff --git a/arch/arm64/boot/dts/mediatek/mt8370.dtsi b/arch/arm64/boot/dts/mediatek/mt8370.dtsi
new file mode 100644
index 0000000000000000000000000000000000000000..cf1a3759451ff899ce9e63e5a00f192fb483f6e5
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt8370.dtsi
@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+/*
+ * Copyright (c) 2025 Collabora Ltd.
+ * Author: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
+ */
+
+/dts-v1/;
+#include "mt8188.dtsi"
+
+/ {
+	compatible = "mediatek,mt8370";
+
+	cpus {
+		/delete-node/ cpu@400;
+		/delete-node/ cpu@500;
+
+		cpu-map {
+			cluster0 {
+				/delete-node/ core4;
+				/delete-node/ core5;
+			};
+		};
+	};
+};
+
+&cpu6 {
+	clock-frequency = <2200000000>;
+};
+
+&cpu7 {
+	clock-frequency = <2200000000>;
+};
+
+&cpu_little0_cooling_map0 {
+	cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+};
+
+&cpu_little1_cooling_map0 {
+	cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+};
+
+&cpu_little2_cooling_map0 {
+	cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+};
+
+&cpu_little3_cooling_map0 {
+	cooling-device = <&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu1 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu2 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>,
+				<&cpu3 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+};
+
+&ppi_cluster0 {
+	affinity = <&cpu0 &cpu1 &cpu2 &cpu3>;
+};

-- 
2.48.0