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bq27x00_battery: Cache energy property

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Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Pali Rohár 2011-11-01 01:43:06 +01:00 committed by Anton Vorontsov
parent 4b226c2cf0
commit a8f6bd23cc
1 changed files with 26 additions and 27 deletions
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53
drivers/power/bq27x00_battery.c
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@ -84,6 +84,7 @@ struct bq27x00_reg_cache {
int charge_full;
int cycle_count;
int capacity;
int energy;
int flags;
};
@ -224,6 +225,28 @@ static int bq27x00_battery_read_ilmd(struct bq27x00_device_info *di)
return ilmd;
}
/*
* Return the battery Available energy in µWh
* Or < 0 if something fails.
*/
static int bq27x00_battery_read_energy(struct bq27x00_device_info *di)
{
int ae;
ae = bq27x00_read(di, BQ27x00_REG_AE, false);
if (ae < 0) {
dev_err(di->dev, "error reading available energy\n");
return ae;
}
if (di->chip == BQ27500)
ae *= 1000;
else
ae = ae * 29200 / BQ27000_RS;
return ae;
}
/*
* Return the battery Cycle count total
* Or < 0 if something fails.
@ -268,12 +291,14 @@ static void bq27x00_update(struct bq27x00_device_info *di)
if (cache.flags >= 0) {
if (!is_bq27500 && (cache.flags & BQ27000_FLAG_CI)) {
cache.capacity = -ENODATA;
cache.energy = -ENODATA;
cache.time_to_empty = -ENODATA;
cache.time_to_empty_avg = -ENODATA;
cache.time_to_full = -ENODATA;
cache.charge_full = -ENODATA;
} else {
cache.capacity = bq27x00_battery_read_rsoc(di);
cache.energy = bq27x00_battery_read_energy(di);
cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE);
cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP);
cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF);
@ -435,32 +460,6 @@ static int bq27x00_battery_voltage(struct bq27x00_device_info *di,
return 0;
}
/*
* Return the battery Available energy in µWh
* Or < 0 if something fails.
*/
static int bq27x00_battery_energy(struct bq27x00_device_info *di,
union power_supply_propval *val)
{
int ae;
ae = bq27x00_read(di, BQ27x00_REG_AE, false);
if (ae < 0) {
dev_err(di->dev, "error reading available energy\n");
return ae;
}
if (di->chip == BQ27500)
ae *= 1000;
else
ae = ae * 29200 / BQ27000_RS;
val->intval = ae;
return 0;
}
static int bq27x00_simple_value(int value,
union power_supply_propval *val)
{
@ -539,7 +538,7 @@ static int bq27x00_battery_get_property(struct power_supply *psy,
ret = bq27x00_simple_value(di->cache.cycle_count, val);
break;
case POWER_SUPPLY_PROP_ENERGY_NOW:
ret = bq27x00_battery_energy(di, val);
ret = bq27x00_simple_value(di->cache.energy, val);
break;
default:
return -EINVAL;