Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Rafael J. Wysocki | 286 | 100.00% | 4 | 100.00% |
Total | 286 | 4 |
// SPDX-License-Identifier: GPL-2.0 /* * Copyright 2023 Linaro Limited * Copyright 2023 Intel Corporation * * Library routines for populating a generic thermal trip point structure * with data obtained by evaluating a specific object in the ACPI Namespace. */ #include <linux/acpi.h> #include <linux/units.h> #include <linux/thermal.h> /* * Minimum temperature for full military grade is 218°K (-55°C) and * max temperature is 448°K (175°C). We can consider those values as * the boundaries for the [trips] temperature returned by the * firmware. Any values out of these boundaries may be considered * bogus and we can assume the firmware has no data to provide. */ #define TEMP_MIN_DECIK 2180 #define TEMP_MAX_DECIK 4480 static int thermal_acpi_trip_temp(struct acpi_device *adev, char *obj_name, int *ret_temp) { unsigned long long temp; acpi_status status; status = acpi_evaluate_integer(adev->handle, obj_name, NULL, &temp); if (ACPI_FAILURE(status)) { acpi_handle_debug(adev->handle, "%s evaluation failed\n", obj_name); return -ENODATA; } if (temp >= TEMP_MIN_DECIK && temp <= TEMP_MAX_DECIK) { *ret_temp = deci_kelvin_to_millicelsius(temp); } else { acpi_handle_debug(adev->handle, "%s result %llu out of range\n", obj_name, temp); *ret_temp = THERMAL_TEMP_INVALID; } return 0; } /** * thermal_acpi_active_trip_temp - Retrieve active trip point temperature * @adev: Target thermal zone ACPI device object. * @id: Active cooling level (0 - 9). * @ret_temp: Address to store the retrieved temperature value on success. * * Evaluate the _ACx object for the thermal zone represented by @adev to obtain * the temperature of the active cooling trip point corresponding to the active * cooling level given by @id. * * Return 0 on success or a negative error value on failure. */ int thermal_acpi_active_trip_temp(struct acpi_device *adev, int id, int *ret_temp) { char obj_name[] = {'_', 'A', 'C', '0' + id, '\0'}; if (id < 0 || id > 9) return -EINVAL; return thermal_acpi_trip_temp(adev, obj_name, ret_temp); } EXPORT_SYMBOL_GPL(thermal_acpi_active_trip_temp); /** * thermal_acpi_passive_trip_temp - Retrieve passive trip point temperature * @adev: Target thermal zone ACPI device object. * @ret_temp: Address to store the retrieved temperature value on success. * * Evaluate the _PSV object for the thermal zone represented by @adev to obtain * the temperature of the passive cooling trip point. * * Return 0 on success or -ENODATA on failure. */ int thermal_acpi_passive_trip_temp(struct acpi_device *adev, int *ret_temp) { return thermal_acpi_trip_temp(adev, "_PSV", ret_temp); } EXPORT_SYMBOL_GPL(thermal_acpi_passive_trip_temp); /** * thermal_acpi_hot_trip_temp - Retrieve hot trip point temperature * @adev: Target thermal zone ACPI device object. * @ret_temp: Address to store the retrieved temperature value on success. * * Evaluate the _HOT object for the thermal zone represented by @adev to obtain * the temperature of the trip point at which the system is expected to be put * into the S4 sleep state. * * Return 0 on success or -ENODATA on failure. */ int thermal_acpi_hot_trip_temp(struct acpi_device *adev, int *ret_temp) { return thermal_acpi_trip_temp(adev, "_HOT", ret_temp); } EXPORT_SYMBOL_GPL(thermal_acpi_hot_trip_temp); /** * thermal_acpi_critical_trip_temp - Retrieve critical trip point temperature * @adev: Target thermal zone ACPI device object. * @ret_temp: Address to store the retrieved temperature value on success. * * Evaluate the _CRT object for the thermal zone represented by @adev to obtain * the temperature of the critical cooling trip point. * * Return 0 on success or -ENODATA on failure. */ int thermal_acpi_critical_trip_temp(struct acpi_device *adev, int *ret_temp) { return thermal_acpi_trip_temp(adev, "_CRT", ret_temp); } EXPORT_SYMBOL_GPL(thermal_acpi_critical_trip_temp);
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