| /* 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__ */ |
