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c27d08f786
It is not necessary to include thermal_core.h into thermal_acpi.c,
because none of the code in there depends on anything in the former,
except for the linux/thermal.h, but it is better to include that one
directly instead of including the entire thermal_core.h, so make that
change.
No functional impact.
Fixes: 7a0e397488 ("thermal: ACPI: Add ACPI trip point routines")
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
117 lines
3.8 KiB
C
117 lines
3.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright 2023 Linaro Limited
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* Copyright 2023 Intel Corporation
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*
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* Library routines for populating a generic thermal trip point structure
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* with data obtained by evaluating a specific object in the ACPI Namespace.
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*/
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#include <linux/acpi.h>
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#include <linux/units.h>
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#include <linux/thermal.h>
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/*
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* Minimum temperature for full military grade is 218°K (-55°C) and
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* max temperature is 448°K (175°C). We can consider those values as
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* the boundaries for the [trips] temperature returned by the
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* firmware. Any values out of these boundaries may be considered
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* bogus and we can assume the firmware has no data to provide.
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*/
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#define TEMP_MIN_DECIK 2180
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#define TEMP_MAX_DECIK 4480
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static int thermal_acpi_trip_temp(struct acpi_device *adev, char *obj_name,
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int *ret_temp)
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{
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unsigned long long temp;
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acpi_status status;
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status = acpi_evaluate_integer(adev->handle, obj_name, NULL, &temp);
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if (ACPI_FAILURE(status)) {
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acpi_handle_debug(adev->handle, "%s evaluation failed\n", obj_name);
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return -ENODATA;
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}
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if (temp >= TEMP_MIN_DECIK && temp <= TEMP_MAX_DECIK) {
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*ret_temp = deci_kelvin_to_millicelsius(temp);
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} else {
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acpi_handle_debug(adev->handle, "%s result %llu out of range\n",
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obj_name, temp);
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*ret_temp = THERMAL_TEMP_INVALID;
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}
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return 0;
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}
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/**
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* thermal_acpi_active_trip_temp - Retrieve active trip point temperature
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* @adev: Target thermal zone ACPI device object.
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* @id: Active cooling level (0 - 9).
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* @ret_temp: Address to store the retrieved temperature value on success.
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*
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* Evaluate the _ACx object for the thermal zone represented by @adev to obtain
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* the temperature of the active cooling trip point corresponding to the active
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* cooling level given by @id.
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*
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* Return 0 on success or a negative error value on failure.
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*/
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int thermal_acpi_active_trip_temp(struct acpi_device *adev, int id, int *ret_temp)
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{
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char obj_name[] = {'_', 'A', 'C', '0' + id, '\0'};
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if (id < 0 || id > 9)
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return -EINVAL;
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return thermal_acpi_trip_temp(adev, obj_name, ret_temp);
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}
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EXPORT_SYMBOL_GPL(thermal_acpi_active_trip_temp);
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/**
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* thermal_acpi_passive_trip_temp - Retrieve passive trip point temperature
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* @adev: Target thermal zone ACPI device object.
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* @ret_temp: Address to store the retrieved temperature value on success.
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*
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* Evaluate the _PSV object for the thermal zone represented by @adev to obtain
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* the temperature of the passive cooling trip point.
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*
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* Return 0 on success or -ENODATA on failure.
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*/
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int thermal_acpi_passive_trip_temp(struct acpi_device *adev, int *ret_temp)
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{
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return thermal_acpi_trip_temp(adev, "_PSV", ret_temp);
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}
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EXPORT_SYMBOL_GPL(thermal_acpi_passive_trip_temp);
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/**
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* thermal_acpi_hot_trip_temp - Retrieve hot trip point temperature
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* @adev: Target thermal zone ACPI device object.
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* @ret_temp: Address to store the retrieved temperature value on success.
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*
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* Evaluate the _HOT object for the thermal zone represented by @adev to obtain
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* the temperature of the trip point at which the system is expected to be put
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* into the S4 sleep state.
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*
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* Return 0 on success or -ENODATA on failure.
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*/
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int thermal_acpi_hot_trip_temp(struct acpi_device *adev, int *ret_temp)
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{
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return thermal_acpi_trip_temp(adev, "_HOT", ret_temp);
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}
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EXPORT_SYMBOL_GPL(thermal_acpi_hot_trip_temp);
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/**
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* thermal_acpi_critical_trip_temp - Retrieve critical trip point temperature
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* @adev: Target thermal zone ACPI device object.
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* @ret_temp: Address to store the retrieved temperature value on success.
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*
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* Evaluate the _CRT object for the thermal zone represented by @adev to obtain
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* the temperature of the critical cooling trip point.
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*
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* Return 0 on success or -ENODATA on failure.
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*/
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int thermal_acpi_critical_trip_temp(struct acpi_device *adev, int *ret_temp)
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{
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return thermal_acpi_trip_temp(adev, "_CRT", ret_temp);
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}
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EXPORT_SYMBOL_GPL(thermal_acpi_critical_trip_temp);
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