linux-kernel - [PATCHv2] arm64: dts: meson: Enable active coling using gpio-fan on Odroid N2/N2+

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Message-Id: <20221021050906.1158-1-linux.amoon@gmail.com>
Date:   Fri, 21 Oct 2022 05:09:03 +0000
From:   Anand Moon <linux.amoon@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     Anand Moon <linux.amoon@...il.com>,
        Dan Johansen <strit@...jaro.org>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCHv2] arm64: dts: meson: Enable active coling using gpio-fan on Odroid N2/N2+

Odroid N2/N2+ support active cooling via gpio-fan controller.
Add fan controls and tip point for cpu and ddr thermal sensor
on this boards.

Signed-off-by: Anand Moon <linux.amoon@...il.com>
---
v2: changes tip name cpu-active --> ddr-active
---
 .../dts/amlogic/meson-g12b-odroid-n2.dtsi     | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
index fd3fa82e4c33..667d2b774924 100644
--- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dtsi
@@ -39,6 +39,14 @@ emmc_pwrseq: emmc-pwrseq {
 		reset-gpios = <&gpio BOOT_12 GPIO_ACTIVE_LOW>;
 	};
 
+	fan: gpio-fan {
+		compatible = "gpio-fan";
+		gpios = <&gpio_ao GPIOAO_10 GPIO_ACTIVE_HIGH>;
+		/* Using Dummy Speed */
+		gpio-fan,speed-map = <0 0>, <1 1>;
+		#cooling-cells = <2>;
+	};
+
 	leds {
 		compatible = "gpio-leds";
 
@@ -410,6 +418,40 @@ &cpu103 {
 	clock-latency = <50000>;
 };
 
+&cpu_thermal {
+	trips {
+		cpu_active: cpu-active {
+			temperature = <60000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&cpu_active>;
+			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
+&ddr_thermal {
+	trips {
+		ddr_active: ddr-active {
+			temperature = <60000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&ddr_active>;
+			cooling-device = <&fan THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &ext_mdio {
 	external_phy: ethernet-phy@0 {
 		/* Realtek RTL8211F (0x001cc916) */

base-commit: aae703b02f92bde9264366c545e87cec451de471
-- 
2.38.0