/**
* smb347_charging_status - returns status of charging
* @smb: pointer to smb347 charger instance
*
* Function returns charging status. %0 means no charging is in progress,
* %1 means pre-charging, %2 fast-charging and %3 taper-charging.
*/
static int smb347_charging_status(struct smb347_charger *smb)
{
int ret;
if (!smb347_is_online(smb))
return 0;
ret = smb347_read(smb, STAT_C);
if (ret < 0)
return 0;
return (ret & STAT_C_CHG_MASK) >> STAT_C_CHG_SHIFT;
}
static int smb347_update_online(struct smb347_charger *smb)
{
int ret;
if (smb347_is_online(smb)) {
ret = smb347_charging_enable(smb);
if (ret < 0)
dev_err(&smb->client->dev,
"failed to enable charging\n");
} else {
ret = smb347_charging_disable(smb);
if (ret < 0)
dev_err(&smb->client->dev,
"failed to disable charging\n");
}
return ret;
}
static int smb347_update_online(struct smb347_charger *smb)
{
int ret;
/*
* Depending on whether valid power source is connected or not, we
* disable or enable the charging. We do it manually because it
* depends on how the platform has configured the valid inputs.
*/
if (smb347_is_online(smb)) {
ret = smb347_charging_enable(smb);
if (ret < 0)
dev_err(&smb->client->dev,
"failed to enable charging\n");
} else {
ret = smb347_charging_disable(smb);
if (ret < 0)
dev_err(&smb->client->dev,
"failed to disable charging\n");
}
return ret;
}
static int smb347_battery_get_property(struct power_supply *psy,
enum power_supply_property prop,
union power_supply_propval *val)
{
struct smb347_charger *smb =
container_of(psy, struct smb347_charger, battery);
const struct smb347_charger_platform_data *pdata = smb->pdata;
int ret;
ret = smb347_update_status(smb);
if (ret < 0)
return ret;
if (ret > 0) {
smb347_update_online(smb);
power_supply_changed(&smb->mains);
power_supply_changed(&smb->usb);
}
switch (prop) {
case POWER_SUPPLY_PROP_STATUS:
if (!smb347_is_online(smb)) {
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
break;
}
if (smb347_charging_status(smb))
val->intval = POWER_SUPPLY_STATUS_CHARGING;
else
val->intval = POWER_SUPPLY_STATUS_FULL;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (!smb347_is_online(smb))
return -ENODATA;
/*
* We handle trickle and pre-charging the same, and taper
* and none the same.
*/
switch (smb347_charging_status(smb)) {
case 1:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 2:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
default:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = pdata->battery_info.technology;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
val->intval = pdata->battery_info.voltage_min_design;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
val->intval = pdata->battery_info.voltage_max_design;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (!smb347_is_online(smb))
return -ENODATA;
ret = smb347_read(smb, STAT_A);
if (ret < 0)
return ret;
ret &= STAT_A_FLOAT_VOLTAGE_MASK;
if (ret > 0x3d)
ret = 0x3d;
val->intval = 3500000 + ret * 20000;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (!smb347_is_online(smb))
return -ENODATA;
ret = smb347_read(smb, STAT_B);
if (ret < 0)
return ret;
/*
* The current value is composition of FCC and PCC values
* and we can detect which table to use from bit 5.
*/
if (ret & 0x20) {
val->intval = hw_to_current(fcc_tbl,
ARRAY_SIZE(fcc_tbl),
ret & 7);
} else {
ret >>= 3;
val->intval = hw_to_current(pcc_tbl,
ARRAY_SIZE(pcc_tbl),
ret & 7);
}
break;
case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
val->intval = pdata->battery_info.charge_full_design;
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = pdata->battery_info.name;
break;
default:
return -EINVAL;
}
return 0;
}
