diff options
Diffstat (limited to 'drivers/power/bq27x00_battery.c')
| -rw-r--r-- | drivers/power/bq27x00_battery.c | 81 |
1 files changed, 79 insertions, 2 deletions
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index 1526d020cbc6..5d940fad8d43 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -32,10 +32,16 @@ #define BQ27x00_REG_VOLT 0x08 #define BQ27x00_REG_AI 0x14 #define BQ27x00_REG_FLAGS 0x0A +#define BQ27x00_REG_TTE 0x16 +#define BQ27x00_REG_TTF 0x18 +#define BQ27x00_REG_TTECP 0x26 #define BQ27000_REG_RSOC 0x0B /* Relative State-of-Charge */ +#define BQ27000_FLAG_CHGS BIT(7) #define BQ27500_REG_SOC 0x2c +#define BQ27500_FLAG_DSC BIT(0) +#define BQ27500_FLAG_FC BIT(9) /* If the system has several batteries we need a different name for each * of them... @@ -62,11 +68,15 @@ struct bq27x00_device_info { }; static enum power_supply_property bq27x00_battery_props[] = { + POWER_SUPPLY_PROP_STATUS, POWER_SUPPLY_PROP_PRESENT, POWER_SUPPLY_PROP_VOLTAGE_NOW, POWER_SUPPLY_PROP_CURRENT_NOW, POWER_SUPPLY_PROP_CAPACITY, POWER_SUPPLY_PROP_TEMP, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW, + POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG, + POWER_SUPPLY_PROP_TIME_TO_FULL_NOW, }; /* @@ -144,7 +154,7 @@ static int bq27x00_battery_current(struct bq27x00_device_info *di) dev_err(di->dev, "error reading flags\n"); return 0; } - if ((flags & (1 << 7)) != 0) { + if (flags & BQ27000_FLAG_CHGS) { dev_dbg(di->dev, "negative current!\n"); return -curr; } @@ -174,6 +184,60 @@ static int bq27x00_battery_rsoc(struct bq27x00_device_info *di) return rsoc; } +static int bq27x00_battery_status(struct bq27x00_device_info *di, + union power_supply_propval *val) +{ + int flags = 0; + int status; + int ret; + + ret = bq27x00_read(BQ27x00_REG_FLAGS, &flags, 0, di); + if (ret < 0) { + dev_err(di->dev, "error reading flags\n"); + return ret; + } + + if (di->chip == BQ27500) { + if (flags & BQ27500_FLAG_FC) + status = POWER_SUPPLY_STATUS_FULL; + else if (flags & BQ27500_FLAG_DSC) + status = POWER_SUPPLY_STATUS_DISCHARGING; + else + status = POWER_SUPPLY_STATUS_CHARGING; + } else { + if (flags & BQ27000_FLAG_CHGS) + status = POWER_SUPPLY_STATUS_CHARGING; + else + status = POWER_SUPPLY_STATUS_DISCHARGING; + } + + val->intval = status; + return 0; +} + +/* + * Read a time register. + * Return < 0 if something fails. + */ +static int bq27x00_battery_time(struct bq27x00_device_info *di, int reg, + union power_supply_propval *val) +{ + int tval = 0; + int ret; + + ret = bq27x00_read(reg, &tval, 0, di); + if (ret) { + dev_err(di->dev, "error reading register %02x\n", reg); + return ret; + } + + if (tval == 65535) + return -ENODATA; + + val->intval = tval * 60; + return 0; +} + #define to_bq27x00_device_info(x) container_of((x), \ struct bq27x00_device_info, bat); @@ -181,9 +245,13 @@ static int bq27x00_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { + int ret = 0; struct bq27x00_device_info *di = to_bq27x00_device_info(psy); switch (psp) { + case POWER_SUPPLY_PROP_STATUS: + ret = bq27x00_battery_status(di, val); + break; case POWER_SUPPLY_PROP_VOLTAGE_NOW: case POWER_SUPPLY_PROP_PRESENT: val->intval = bq27x00_battery_voltage(di); @@ -199,11 +267,20 @@ static int bq27x00_battery_get_property(struct power_supply *psy, case POWER_SUPPLY_PROP_TEMP: val->intval = bq27x00_battery_temperature(di); break; + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW: + ret = bq27x00_battery_time(di, BQ27x00_REG_TTE, val); + break; + case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG: + ret = bq27x00_battery_time(di, BQ27x00_REG_TTECP, val); + break; + case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW: + ret = bq27x00_battery_time(di, BQ27x00_REG_TTF, val); + break; default: return -EINVAL; } - return 0; + return ret; } static void bq27x00_powersupply_init(struct bq27x00_device_info *di) |