arm64: dts: apple: add common hwmon keys and fans

Each SoC's SMC exposes a different set of hardware sensor keys,
however there are a number that are shared between all currently
supported SoCs. Describe these in a .dtsi so that we don't need to
duplicate them across every SoC.

Likewise, the fans on every machine are exposed as the same set of
keys on each. Add .dtsis for these too.

Co-developed-by: Janne Grunau <j@jannau.net>
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: James Calligeros <jcalligeros99@gmail.com>

Author: chadmed

arch/arm64/boot/dts/apple/hwmon-common.dtsi

@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * hwmon sensors expected on all systems
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+&smc {
+	hwmon {
+		apple,power-keys {
+			power-PSTR {
+				apple,key-id = "PSTR";
+				label = "Total System Power";
+			};
+			power-PDTR {
+				apple,key-id = "PDTR";
+				label = "AC Input Power";
+			};
+			power-PMVR {
+				apple,key-id = "PMVR";
+				label = "3.8 V Rail Power";
+			};
+		};
+		apple,temp-keys {
+			temp-TH0x {
+				apple,key-id = "TH0x";
+				label = "NAND Flash Temperature";
+			};
+		};
+		apple,volt-keys {
+			volt-VD0R {
+				apple,key-id = "VD0R";
+				label = "AC Input Voltage";
+			};
+		};
+		apple,current-keys {
+			current-ID0R {
+				apple,key-id = "ID0R";
+				label = "AC Input Current";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/apple/hwmon-fan-dual.dtsi

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright The Asahi Linux Contributors
+ *
+ * Fan hwmon sensors for machines with 2 fan.
+ */
+
+#include "hwmon-fan.dtsi"
+
+&smc {
+	hwmon {
+		apple,fan-keys {
+			fan-F0Ac {
+				label = "Fan 1";
+			};
+			fan-F1Ac {
+				apple,key-id = "F1Ac";
+				label = "Fan 2";
+				apple,fan-minimum = "F1Mn";
+				apple,fan-maximum = "F1Mx";
+				apple,fan-target = "F1Tg";
+				apple,fan-mode = "F1Md";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/apple/hwmon-fan.dtsi

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * Copyright The Asahi Linux Contributors
+ *
+ * Fan hwmon sensors for machines with a single fan.
+ */
+
+&smc {
+	hwmon {
+		apple,fan-keys {
+			fan-F0Ac {
+				apple,key-id = "F0Ac";
+				label = "Fan";
+				apple,fan-minimum = "F0Mn";
+				apple,fan-maximum = "F0Mx";
+				apple,fan-target = "F0Tg";
+				apple,fan-mode = "F0Md";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/apple/hwmon-laptop.dtsi

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * hwmon sensors expected on all laptops
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+&smc {
+	hwmon {
+		apple,power-keys {
+			power-PHPC {
+				apple,key-id = "PHPC";
+				label = "Heatpipe Power";
+			};
+		};
+		apple,temp-keys {
+			temp-TB0T {
+				apple,key-id = "TB0T";
+				label = "Battery Hotspot";
+			};
+			temp-TCHP {
+				apple,key-id = "TCHP";
+				label = "Charge Regulator Temp";
+			};
+			temp-TW0P {
+				apple,key-id = "TW0P";
+				label = "WiFi/BT Module Temp";
+			};
+		};
+		apple,volt-keys {
+			volt-SBAV {
+				apple,key-id = "SBAV";
+				label = "Battery Voltage";
+			};
+			volt-VD0R {
+				apple,key-id = "VD0R";
+				label = "Charger Input Voltage";
+			};
+		};
+	};
+};

arch/arm64/boot/dts/apple/hwmon-mini.dtsi

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: GPL-2.0+ OR MIT
+/*
+ * hwmon sensors common to the Mac mini desktop
+ * models, but not the Studio or Pro.
+ *
+ * Copyright The Asahi Linux Contributors
+ */
+
+#include "hwmon-fan.dtsi"
+
+&smc {
+	hwmon {
+		apple,temp-keys {
+			temp-TW0P {
+				apple,key-id = "TW0P";
+				label = "WiFi/BT Module Temp";
+			};
+		};
+	};
+};