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ACPI: platform: Add platform profile support

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This is the initial implementation of the platform-profile feature.
It provides the details discussed and outlined in the
sysfs-platform_profile document.

Many modern systems have the ability to modify the operating profile to
control aspects like fan speed, temperature and power levels. This
module provides a common sysfs interface that platform modules can register
against to control their individual profile options.

Signed-off-by: Mark Pearson <markpearson@lenovo.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
[ rjw: Use full words in enum values names ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Mark Pearson 2020-12-29 19:18:26 -05:00 • committed by Rafael J. Wysocki
parent 8e0cbf3563
commit a2ff95e018
4 changed files with 238 additions and 0 deletions
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39
include/linux/platform_profile.h Normal file
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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Platform profile sysfs interface
*
* See Documentation/ABI/testing/sysfs-platform_profile.rst for more
* information.
*/
#ifndef _PLATFORM_PROFILE_H_
#define _PLATFORM_PROFILE_H_
#include <linux/bitops.h>
/*
* If more options are added please update profile_names
* array in platform-profile.c and sysfs-platform-profile.rst
* documentation.
*/
enum platform_profile_option {
PLATFORM_PROFILE_LOW_POWER,
PLATFORM_PROFILE_COOL,
PLATFORM_PROFILE_QUIET,
PLATFORM_PROFILE_BALANCED,
PLATFORM_PROFILE_PERFORMANCE,
PLATFORM_PROFILE_LAST, /*must always be last */
};
struct platform_profile_handler {
unsigned long choices[BITS_TO_LONGS(PLATFORM_PROFILE_LAST)];
int (*profile_get)(enum platform_profile_option *profile);
int (*profile_set)(enum platform_profile_option profile);
};
int platform_profile_register(const struct platform_profile_handler *pprof);
int platform_profile_remove(void);
void platform_profile_notify(void);
#endif /*_PLATFORM_PROFILE_H_*/