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sbs-battery: add ability to get battery capacity 

Battery capacity level is a standard feature of sbs battery
That can be used to tell what the remainig battery capacity is, and
can tell if the battery has not been calibrated/initialized, which makes
the capacity and charging/discharging percentages invalid.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
hifive-unleashed-5.1
Joshua Clayton 2016-08-11 09:59:12 -07:00 committed by Sebastian Reichel
parent 492ff9d8f5
commit 957cb72051
1 changed files with 22 additions and 1 deletions
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23
drivers/power/supply/sbs-battery.c
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@ -41,6 +41,7 @@ enum {
REG_TIME_TO_EMPTY,
REG_TIME_TO_FULL,
REG_STATUS,
REG_CAPACITY_LEVEL,
REG_CYCLE_COUNT,
REG_SERIAL_NUMBER,
REG_REMAINING_CAPACITY,
@ -68,6 +69,7 @@ enum sbs_battery_mode {
#define MANUFACTURER_ACCESS_SLEEP 0x0011
/* battery status value bits */
#define BATTERY_INITIALIZED 0x80
#define BATTERY_DISCHARGING 0x40
#define BATTERY_FULL_CHARGED 0x20
#define BATTERY_FULL_DISCHARGED 0x10
@ -110,6 +112,8 @@ static const struct chip_data {
SBS_DATA(POWER_SUPPLY_PROP_TIME_TO_FULL_AVG, 0x13, 0, 65535),
[REG_STATUS] =
SBS_DATA(POWER_SUPPLY_PROP_STATUS, 0x16, 0, 65535),
[REG_CAPACITY_LEVEL] =
SBS_DATA(POWER_SUPPLY_PROP_CAPACITY_LEVEL, 0x16, 0, 65535),
[REG_CYCLE_COUNT] =
SBS_DATA(POWER_SUPPLY_PROP_CYCLE_COUNT, 0x17, 0, 65535),
[REG_DESIGN_CAPACITY] =
@ -131,6 +135,7 @@ static const struct chip_data {
static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_TECHNOLOGY,
@ -376,8 +381,23 @@ static int sbs_get_battery_property(struct i2c_client *client,
if (ret >= sbs_data[reg_offset].min_value &&
ret <= sbs_data[reg_offset].max_value) {
val->intval = ret;
if (psp != POWER_SUPPLY_PROP_STATUS)
if (psp == POWER_SUPPLY_PROP_CAPACITY_LEVEL) {
if (!(ret & BATTERY_INITIALIZED))
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
else if (ret & BATTERY_FULL_CHARGED)
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_FULL;
else if (ret & BATTERY_FULL_DISCHARGED)
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
else
val->intval =
POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
return 0;
} else if (psp != POWER_SUPPLY_PROP_STATUS) {
return 0;
}
if (ret & BATTERY_FULL_CHARGED)
val->intval = POWER_SUPPLY_STATUS_FULL;
@ -589,6 +609,7 @@ static int sbs_get_property(struct power_supply *psy,
break;
case POWER_SUPPLY_PROP_STATUS:
case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
case POWER_SUPPLY_PROP_CYCLE_COUNT:
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
case POWER_SUPPLY_PROP_CURRENT_NOW: