linux-kernel - [RFC 8/8] arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

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Message-Id: <20200421080102.22796-9-narmstrong@baylibre.com>
Date:   Tue, 21 Apr 2020 10:01:02 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     khilman@...libre.com
Cc:     nick@...das.com, art@...das.com,
        Neil Armstrong <narmstrong@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-hwmon@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [RFC 8/8] arm64: dts: meson-khadas-vim3: add Khadas MCU nodes

Add the Khadas MCU node with active FAN thermal nodes for all the
Khadas VIM3 variants.

Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
---
 .../boot/dts/amlogic/meson-khadas-vim3.dtsi   | 23 +++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
index 094ecf2222bb..3325e54ea690 100644
--- a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
@@ -183,6 +183,23 @@
 	hdmi-phandle = <&hdmi_tx>;
 };
 
+&cpu_thermal {
+	trips {
+		cpu_active: cpu-active {
+			temperature = <80000>; /* millicelsius */
+			hysteresis = <2000>; /* millicelsius */
+			type = "active";
+		};
+	};
+
+	cooling-maps {
+		map {
+			trip = <&cpu_active>;
+			cooling-device = <&khadas_mcu THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+		};
+	};
+};
+
 &ext_mdio {
 	external_phy: ethernet-phy@0 {
 		/* Realtek RTL8211F (0x001cc916) */
@@ -222,6 +239,12 @@
 	pinctrl-0 = <&i2c_ao_sck_pins>, <&i2c_ao_sda_pins>;
 	pinctrl-names = "default";
 
+	khadas_mcu: system-controller@18 {
+		compatible = "khadas,mcu";
+		reg = <0x18>;
+		#cooling-cells = <2>;
+	};
+
 	gpio_expander: gpio-controller@20 {
 		compatible = "ti,tca6408";
 		reg = <0x20>;
-- 
2.22.0