linux-kernel - [PATCH v1 10/14] arm64: dts: mediatek: mt7988a-bpi-r4: Add fan and coolingmaps

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Message-ID: <20250511142655.11007-1-frank-w@public-files.de>
Date: Sun, 11 May 2025 16:26:50 +0200
From: Frank Wunderlich <frank-w@...lic-files.de>
To: Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	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>
Cc: Frank Wunderlich <frank-w@...lic-files.de>,
	Arınç ÜNAL <arinc.unal@...nc9.com>,
	Landen Chao <Landen.Chao@...iatek.com>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>,
	Daniel Golle <daniel@...rotopia.org>,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Felix Fietkau <nbd@....name>,
	netdev@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: [PATCH v1 10/14] arm64: dts: mediatek: mt7988a-bpi-r4: Add fan and coolingmaps

Add Fan and cooling maps for Bananpi-R4 board.

Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
 .../dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi
index 23b267cd47ac..c6f84de82a4d 100644
--- a/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt7988a-bananapi-bpi-r4.dtsi
@@ -12,6 +12,15 @@ chosen {
 		stdout-path = "serial0:115200n8";
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		/* cooling level (0, 1, 2, 3) : (0% duty, 30% duty, 50% duty, 100% duty) */
+		cooling-levels = <0 80 128 255>;
+		#cooling-cells = <2>;
+		pwms = <&pwm 0 50000>;
+		status = "okay";
+	};
+
 	reg_1p8v: regulator-1p8v {
 		compatible = "regulator-fixed";
 		regulator-name = "fixed-1.8V";
@@ -73,6 +82,26 @@ cpu_trip_active_low: active-low {
 			type = "active";
 		};
 	};
+
+	cooling-maps {
+		map-cpu-active-high {
+			/* active: set fan to cooling level 2 */
+			cooling-device = <&fan 3 3>;
+			trip = <&cpu_trip_active_high>;
+		};
+
+		map-cpu-active-med {
+			/* active: set fan to cooling level 1 */
+			cooling-device = <&fan 2 2>;
+			trip = <&cpu_trip_active_med>;
+		};
+
+		map-cpu-active-low {
+			/* active: set fan to cooling level 0 */
+			cooling-device = <&fan 1 1>;
+			trip = <&cpu_trip_active_low>;
+		};
+	};
 };
 
 &i2c0 {
-- 
2.43.0