diff options
| author | syed rafiuddin <srafiuddin@nvidia.com> | 2011-05-12 12:36:23 +0530 |
|---|---|---|
| committer | Varun Colbert <vcolbert@nvidia.com> | 2011-05-18 11:46:03 -0700 |
| commit | 0e88b6e178abfa50cbd594f48f972f390ce5a6bf (patch) | |
| tree | 7862f63f5561ebe927bf926441e263c5438f5711 /drivers | |
| parent | 342ec3b7714c672cbccaf72be8872cc555e28611 (diff) | |
power: battery: bq27x00: add "health" property
Addition of Health property which informs the health of the battery
like good, dead and over charge.
Bug 786669
Change-Id: I4ed3684ec4e777d110f3c5bd2a062ac5be22c6e2
Reviewed-on: http://git-master/r/30505
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
Reviewed-by: Mayuresh Kulkarni <mkulkarni@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
Tested-by: Varun Colbert <vcolbert@nvidia.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/bq27x00_battery.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c index 8f3d8cc0556a..00eaacb9466b 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -45,8 +45,10 @@ #define BQ27500_REG_SOC 0x2c #define BQ27500_FLAG_DSC BIT(0) +#define BQ27500_FLAG_SOCF BIT(1) #define BQ27500_FLAG_BAT_DET BIT(3) #define BQ27500_FLAG_FC BIT(9) +#define BQ27500_FLAG_OTC BIT(15) #define BQ27510_CNTL 0x00 #define BQ27510_ATRATE 0x02 @@ -103,6 +105,7 @@ static enum power_supply_property bq27x00_battery_props[] = { POWER_SUPPLY_PROP_CYCLE_COUNT, POWER_SUPPLY_PROP_TECHNOLOGY, POWER_SUPPLY_PROP_SERIAL_NUMBER, + POWER_SUPPLY_PROP_HEALTH, }; /* @@ -115,6 +118,31 @@ static int bq27x00_read(u8 reg, int *rt_value, int b_single, return di->bus->read(reg, rt_value, b_single, di); } +static int bq27510_battery_health(struct bq27x00_device_info *di, + int reg_offset) +{ + int ret; + int status; + + if (di->chip == BQ27500 || di->chip == BQ27510) { + ret = i2c_smbus_read_word_data(di->client, reg_offset); + if (ret < 0) { + dev_err(di->dev, "read failure\n"); + return ret; + } + + if (ret & BQ27500_FLAG_SOCF) + status = POWER_SUPPLY_HEALTH_DEAD; + else if (ret & BQ27500_FLAG_OTC) + status = POWER_SUPPLY_HEALTH_OVERHEAT; + else + status = POWER_SUPPLY_HEALTH_GOOD; + return status; + } + + return -1; +} + /* * Return the battery temperature in tenths of degree Celsius * Or < 0 if something fails. @@ -407,6 +435,9 @@ static int bq27x00_battery_get_property(struct power_supply *psy, if (bq27510_get_battery_serial_number(di, val)) return -EINVAL; break; + case POWER_SUPPLY_PROP_HEALTH: + val->intval = bq27510_battery_health(di, BQ27x00_REG_FLAGS); + break; default: return -EINVAL; } |