mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-15 08:14:15 +08:00
fa93854f7a
This is a patch that implements a generic hooking API for the generic ACPI battery driver. With this new generic API, drivers can expose platform specific behaviour via sysfs attributes in /sys/class/power_supply/BATn/ in a generic way. A perfect example of the need for this API are Lenovo ThinkPads. Lenovo ThinkPads have a ACPI extension that allows the setting of start and stop charge thresholds in the EC and battery firmware via ACPI. The thinkpad_acpi module can use this API to expose sysfs attributes that it controls inside the ACPI battery driver sysfs tree, under /sys/class/power_supply/BATN/. The file drivers/acpi/battery.h has been moved to include/acpi/battery.h and the includes inside ac.c, sbs.c, and battery.c have been adjusted to reflect that. When drivers hooks into the API, the API calls add_battery() for each battery in the system that passes it a acpi_battery struct. Then, the drivers can use device_create_file() to create new sysfs attributes with that struct and identify the batteries for per-battery attributes. Signed-off-by: Ognjen Galic <smclt30p@gmail.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
22 lines
561 B
C
22 lines
561 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ACPI_BATTERY_H
|
|
#define __ACPI_BATTERY_H
|
|
|
|
#define ACPI_BATTERY_CLASS "battery"
|
|
|
|
#define ACPI_BATTERY_NOTIFY_STATUS 0x80
|
|
#define ACPI_BATTERY_NOTIFY_INFO 0x81
|
|
#define ACPI_BATTERY_NOTIFY_THRESHOLD 0x82
|
|
|
|
struct acpi_battery_hook {
|
|
const char *name;
|
|
int (*add_battery)(struct power_supply *battery);
|
|
int (*remove_battery)(struct power_supply *battery);
|
|
struct list_head list;
|
|
};
|
|
|
|
void battery_hook_register(struct acpi_battery_hook *hook);
|
|
void battery_hook_unregister(struct acpi_battery_hook *hook);
|
|
|
|
#endif
|