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author | Ognjen Galic <smclt30p@gmail.com> | 2018-02-07 17:58:13 +0300 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2018-02-22 01:27:13 +0300 |
commit | fa93854f7a7ed63d054405bf3779247d5300edd3 (patch) | |
tree | fa4d31fbd9f2946d683a0534b456be3c68b6ad03 /drivers/acpi/battery.h | |
parent | 91ab883eb21325ad80f3473633f794c78ac87f51 (diff) | |
download | linux-fa93854f7a7ed63d054405bf3779247d5300edd3.tar.xz |
battery: Add the battery hooking API
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>
Diffstat (limited to 'drivers/acpi/battery.h')
-rw-r--r-- | drivers/acpi/battery.h | 11 |
1 files changed, 0 insertions, 11 deletions
diff --git a/drivers/acpi/battery.h b/drivers/acpi/battery.h deleted file mode 100644 index 225f493d4c27..000000000000 --- a/drivers/acpi/battery.h +++ /dev/null @@ -1,11 +0,0 @@ -/* 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 - -#endif |