1 files changed, 63 insertions, 0 deletions
diff --git a/src/drivers/acpi/thermal_zone/chip.h b/src/drivers/acpi/thermal_zone/chip.h
new file mode 100644
index 0000000000..5792e4c961
--- /dev/null
+++ b/src/drivers/acpi/thermal_zone/chip.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef __DRIVERS_ACPI_THERMAL_ZONE_H__
+#define __DRIVERS_ACPI_THERMAL_ZONE_H__
+
+#include <types.h>
+
+/*
+ * All temperature units are in Celsius.
+ * All time units are in seconds.
+ */
+struct drivers_acpi_thermal_zone_config {
+	/* Description of the thermal zone */
+	const char *description;
+
+	/*
+	 * Device that will provide the temperature reading
+	 *
+	 * This device must have an ACPI method named `TMP` that accepts the
+	 * sensor ID as the first argument. It must then return an Integer containing the
+	 * sensor's temperature in deci-Kelvin.
+	 */
+	DEVTREE_CONST struct device *temperature_controller;
+
+	/* Used to identify the temperature sensor */
+	unsigned int sensor_id;
+
+	/* The polling period in seconds for this thermal zone. */
+	unsigned int polling_period;
+
+	/* The temperature (_CRT) at which the OS must shutdown the system. */
+	unsigned int critical_temperature;
+
+	/* The temperature (_HOT) at which the OS may choose to hibernate the system */
+	unsigned int hibernate_temperature;
+
+	struct acpi_thermal_zone_passive_config {
+		/*
+		 * The temperature (_PSV) at which the OS must activate passive cooling (i.e.,
+		 * throttle the CPUs).
+		 */
+		unsigned int temperature;
+
+		/**
+		 * DeltaP[%] = _TC1 * (Tn - Tn-1) + _TC2 * (Tn - Tt)
+		 * Where:
+		 * Tn = current temperature
+		 * Tt = target temperature (_PSV)
+		 *
+		 * If any of these values are 0, then one of the following defaults will be
+		 * used: TC1: 2, TC2: 5, TSP: 10
+		 */
+		unsigned int time_constant_1;
+		unsigned int time_constant_2;
+		unsigned int time_sampling_period;
+
+	} passive_config;
+
+	/* Place the ThermalZone in the \_TZ scope */
+	bool use_acpi1_thermal_zone_scope;
+};
+
+#endif /* __DRIVERS_ACPI_THERMAL_ZONE_H__ */