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authorZhang Rui <rui.zhang@intel.com>2014-05-28 15:23:36 +0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2014-05-30 13:45:24 +0200
commit1ac5aaa67290b397712e4410de7f067d5cd85871 (patch)
treec44021fda631460070b1a5b90cbefb3acb356756
parentcbcd085da2f99a8b36a07256dd7d1aae38b1d80f (diff)
downloadop-kernel-dev-1ac5aaa67290b397712e4410de7f067d5cd85871.zip
op-kernel-dev-1ac5aaa67290b397712e4410de7f067d5cd85871.tar.gz
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: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
-rw-r--r--drivers/acpi/battery.c23
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 3b4921e..11285e7 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -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,
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