static int max8925_init_charger(struct max8925_chip *chip,
struct max8925_power_info *info)
{
int ret;
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_OVP, "ac-ovp");
if (!info->no_insert_detect) {
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_F, "ac-remove");
REQUEST_IRQ(MAX8925_IRQ_VCHG_DC_R, "ac-insert");
}
if (!info->no_temp_support) {
REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_R, "batt-temp-in-range");
REQUEST_IRQ(MAX8925_IRQ_VCHG_THM_OK_F, "batt-temp-out-range");
}
REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_F, "vsys-high");
REQUEST_IRQ(MAX8925_IRQ_VCHG_SYSLOW_R, "vsys-low");
REQUEST_IRQ(MAX8925_IRQ_VCHG_RST, "charger-reset");
REQUEST_IRQ(MAX8925_IRQ_VCHG_DONE, "charger-done");
REQUEST_IRQ(MAX8925_IRQ_VCHG_TOPOFF, "charger-topoff");
REQUEST_IRQ(MAX8925_IRQ_VCHG_TMR_FAULT, "charger-timer-expire");
info->usb_online = 0;
info->bat_online = 0;
/* check for power - can miss interrupt at boot time */
if (start_measure(info, MEASURE_VCHG) * 2000 > 500000)
info->ac_online = 1;
else
info->ac_online = 0;
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
if (ret >= 0) {
/*
* If battery detection is enabled, ID pin of battery is
* connected to MBDET pin of MAX8925. It could be used to
* detect battery presence.
* Otherwise, we have to assume that battery is always on.
*/
if (info->batt_detect)
info->bat_online = (ret & MAX8925_CHG_MBDET) ? 0 : 1;
else
info->bat_online = 1;
if (ret & MAX8925_CHG_AC_RANGE_MASK)
info->ac_online = 1;
else
info->ac_online = 0;
}
/* disable charge */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 1 << 7, 1 << 7);
/* set charging current in charge topoff mode */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 3 << 5,
info->topoff_threshold << 5);
/* set charing current in fast charge mode */
max8925_set_bits(info->gpm, MAX8925_CHG_CNTL1, 7, info->fast_charge);
return 0;
}
static int max8925_is_enabled(struct regulator_dev *rdev)
{
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
int ret;
ret = max8925_reg_read(info->i2c, info->enable_reg);
if (ret < 0)
return ret;
return ret & (1 << info->enable_bit);
}
static int max8925_backlight_get_brightness(struct backlight_device *bl)
{
struct max8925_backlight_data *data = bl_get_data(bl);
struct max8925_chip *chip = data->chip;
int ret;
ret = max8925_reg_read(chip->i2c, MAX8925_WLED_CNTL);
if (ret < 0)
return -EINVAL;
data->current_brightness = ret;
dev_dbg(chip->dev, "get brightness %d\n", data->current_brightness);
return ret;
}
static int max8925_get_voltage(struct regulator_dev *rdev)
{
struct max8925_regulator_info *info = rdev_get_drvdata(rdev);
unsigned char data, mask;
int ret;
ret = max8925_reg_read(info->i2c, info->vol_reg);
if (ret < 0)
return ret;
mask = ((1 << info->vol_nbits) - 1) << info->vol_shift;
data = (ret & mask) >> info->vol_shift;
return max8925_list_voltage(rdev, data);
}
/*
* MAX8925 gives us an interrupt when ONKEY is pressed or released.
* max8925_set_bits() operates I2C bus and may sleep. So implement
* it in thread IRQ handler.
*/
static irqreturn_t max8925_onkey_handler(int irq, void *data)
{
struct max8925_onkey_info *info = data;
int state;
state = max8925_reg_read(info->i2c, MAX8925_ON_OFF_STATUS);
input_report_key(info->idev, KEY_POWER, state & SW_INPUT);
input_sync(info->idev);
dev_dbg(info->dev, "onkey state:%d\n", state);
/* Enable hardreset to halt if system isn't shutdown on time */
max8925_set_bits(info->i2c, MAX8925_SYSENSEL,
HARDRESET_EN, HARDRESET_EN);
return IRQ_HANDLED;
}
static int max8925_bat_get_prop(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct max8925_power_info *info = dev_get_drvdata(psy->dev->parent);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
val->intval = info->bat_online;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (info->bat_online) {
ret = start_measure(info, MEASURE_VMBATT);
if (ret >= 0) {
val->intval = ret * 2000; /* unit is uV */
ret = 0;
break;
}
}
ret = -ENODATA;
break;
case POWER_SUPPLY_PROP_CURRENT_NOW:
if (info->bat_online) {
ret = start_measure(info, MEASURE_ISNS);
if (ret >= 0) {
/* assume r_sns is 0.02 */
ret = ((ret * 6250) - 3125) /* uA */;
val->intval = 0;
if (ret > 0)
val->intval = ret; /* unit is mA */
ret = 0;
break;
}
}
ret = -ENODATA;
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
if (!info->bat_online) {
ret = -ENODATA;
break;
}
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
ret = (ret & MAX8925_CHG_STAT_MODE_MASK) >> 2;
switch (ret) {
case 1:
val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
break;
case 0:
case 2:
val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
break;
case 3:
val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
break;
}
ret = 0;
break;
case POWER_SUPPLY_PROP_STATUS:
if (!info->bat_online) {
ret = -ENODATA;
break;
}
ret = max8925_reg_read(info->gpm, MAX8925_CHG_STATUS);
if (info->usb_online || info->ac_online) {
val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
if (ret & MAX8925_CHG_STAT_EN_MASK)
val->intval = POWER_SUPPLY_STATUS_CHARGING;
} else
val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
ret = 0;
break;
default:
ret = -ENODEV;
break;
}
return ret;
}
