linux-kernel - [PATCH v1 7/7] arm64: dts: mt7986: add pwm-fan and cooling-maps to BPI-R3 dts

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Date:   Fri, 21 Apr 2023 15:20:47 +0200
From:   Frank Wunderlich <linux@...web.de>
To:     linux-mediatek@...ts.infradead.org
Cc:     Frank Wunderlich <frank-w@...lic-files.de>,
        Jonathan Cameron <jic23@...nel.org>,
        Lars-Peter Clausen <lars@...afoo.de>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        "Hui.Liu" <hui.liu@...iatek.com>,
        Zhiyong Tao <zhiyong.tao@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Lala Lin <lala.lin@...iatek.com>, linux-iio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        Daniel Golle <daniel@...rotopia.org>
Subject: [PATCH v1 7/7] arm64: dts: mt7986: add pwm-fan and cooling-maps to BPI-R3 dts

From: Daniel Golle <daniel@...rotopia.org>

Add pwm-fan and cooling-maps to BananaPi-R3 devicetree.

Signed-off-by: Daniel Golle <daniel@...rotopia.org>
Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
---
this is based on Patch from openwrt. as my PWM-fan seems to need 5v pwm
signal and r3 only provides 3v3 on 3pin-socket it does not work for me.
---
 .../dts/mediatek/mt7986a-bananapi-bpi-r3.dts  | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
index 782519429497..29c018bbf29d 100644
--- a/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
+++ b/arch/arm64/boot/dts/mediatek/mt7986a-bananapi-bpi-r3.dts
@@ -37,6 +37,15 @@ dcin: regulator-12vd {
 		regulator-always-on;
 	};
 
+	fan: pwm-fan {
+		compatible = "pwm-fan";
+		#cooling-cells = <2>;
+		/* cooling level (0, 1, 2) - pwm inverted */
+		cooling-levels = <255 96 0>;
+		pwms = <&pwm 0 10000 0>;
+		status = "okay";
+	};
+
 	gpio-keys {
 		compatible = "gpio-keys";
 
@@ -132,6 +141,28 @@ sfp2: sfp-2 {
 	};
 };
 
+&cpu_thermal {
+	cooling-maps {
+		cpu-active-high {
+			/* active: set fan to cooling level 2 */
+			cooling-device = <&fan 2 2>;
+			trip = <&cpu_trip_active_high>;
+		};
+
+		cpu-active-low {
+			/* active: set fan to cooling level 1 */
+			cooling-device = <&fan 1 1>;
+			trip = <&cpu_trip_active_low>;
+		};
+
+		cpu-passive {
+			/* passive: set fan to cooling level 0 */
+			cooling-device = <&fan 0 0>;
+			trip = <&cpu_trip_passive>;
+		};
+	};
+};
+
 &crypto {
 	status = "okay";
 };
-- 
2.34.1