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Commit 1ac5aaa6 authored by Zhang Rui's avatar Zhang Rui Committed by Rafael J. Wysocki
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ACPI / battery: introduce support for POWER_SUPPLY_PROP_CAPACITY_LEVEL 



ACPI battery device receives notifications when
1. the remaining battery capacity becomes critical low
2. the trip point set by the _BTP (Design capacity of Warning by default)
   is reached or crossed.

So it is able to support POWER_SUPPLY_PROP_CAPACITY_LEVEL to report
        POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL,
        POWER_SUPPLY_CAPACITY_LEVEL_LOW,
        POWER_SUPPLY_CAPACITY_LEVEL_NORMAL,
        POWER_SUPPLY_CAPACITY_LEVEL_FULL,
capacity levels to power supply core and user space.

Introduce support for POWER_SUPPLY_PROP_CAPACITY_LEVEL in this patch.

Signed-off-by: default avatarZhang Rui <rui.zhang@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent cbcd085d

drivers/acpi/battery.c

+20 −3
Original line number Diff line number Diff line
@@ -56,6 +56,10 @@ 
/* Battery power unit: 0 means mW, 1 means mA */

#define ACPI_BATTERY_POWER_UNIT_MA	1



#define ACPI_BATTERY_STATE_DISCHARGING	0x1

#define ACPI_BATTERY_STATE_CHARGING	0x2

#define ACPI_BATTERY_STATE_CRITICAL	0x4



#define _COMPONENT		ACPI_BATTERY_COMPONENT



ACPI_MODULE_NAME("battery");
@@ -169,7 +173,7 @@ static int acpi_battery_get_state(struct acpi_battery *battery); 


static int acpi_battery_is_charged(struct acpi_battery *battery)

{

	/* either charging or discharging */

	/* charging, discharging or critical low */

	if (battery->state != 0)

		return 0;
@@ -204,9 +208,9 @@ static int acpi_battery_get_property(struct power_supply *psy, 
		return -ENODEV;

	switch (psp) {

	case POWER_SUPPLY_PROP_STATUS:

		if (battery->state & 0x01)

		if (battery->state & ACPI_BATTERY_STATE_DISCHARGING)

			val->intval = POWER_SUPPLY_STATUS_DISCHARGING;

		else if (battery->state & 0x02)

		else if (battery->state & ACPI_BATTERY_STATE_CHARGING)

			val->intval = POWER_SUPPLY_STATUS_CHARGING;

		else if (acpi_battery_is_charged(battery))

			val->intval = POWER_SUPPLY_STATUS_FULL;
@@ -269,6 +273,17 @@ static int acpi_battery_get_property(struct power_supply *psy, 
		else

			val->intval = 0;

		break;

	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:

		if (battery->state & ACPI_BATTERY_STATE_CRITICAL)

			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;

		else if (test_bit(ACPI_BATTERY_ALARM_PRESENT, &battery->flags) &&

			(battery->capacity_now <= battery->alarm))

			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_LOW;

		else if (acpi_battery_is_charged(battery))

			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_FULL;

		else

			val->intval = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;

		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:

		val->strval = battery->model_number;

		break;
@@ -296,6 +311,7 @@ static enum power_supply_property charge_battery_props[] = { 
	POWER_SUPPLY_PROP_CHARGE_FULL,

	POWER_SUPPLY_PROP_CHARGE_NOW,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_CAPACITY_LEVEL,

	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER,

	POWER_SUPPLY_PROP_SERIAL_NUMBER,
@@ -313,6 +329,7 @@ static enum power_supply_property energy_battery_props[] = { 
	POWER_SUPPLY_PROP_ENERGY_FULL,

	POWER_SUPPLY_PROP_ENERGY_NOW,

	POWER_SUPPLY_PROP_CAPACITY,

	POWER_SUPPLY_PROP_CAPACITY_LEVEL,

	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER,

	POWER_SUPPLY_PROP_SERIAL_NUMBER,