diff options
| author | syed rafiuddin <srafiuddin@nvidia.com> | 2011-05-12 12:36:23 +0530 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:43:08 -0800 |
| commit | 19bd4df1ede886feddf4322d80b71109e65e623f (patch) | |
| tree | 4889564320576fa3f37c32d3e675333d7c151085 /drivers/power | |
| parent | 005686d2fa20df7b2fe3665fdafa8477fd418615 (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
Original-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>
Rebase-Id: R6786a07368846c217fa2c298df565423a1c63bbb
Diffstat (limited to 'drivers/power')
| -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 42232c296171..b33eae795fab 100644 --- a/drivers/power/bq27x00_battery.c +++ b/drivers/power/bq27x00_battery.c @@ -60,8 +60,10 @@ #define BQ27500_REG_SOC 0x2C #define BQ27500_REG_DCAP 0x3C /* Design capacity */ #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 BQ27000_RS 20 /* Resistor sense */ @@ -133,6 +135,7 @@ static enum power_supply_property bq27x00_battery_props[] = { POWER_SUPPLY_PROP_POWER_AVG, POWER_SUPPLY_PROP_CYCLE_COUNT, POWER_SUPPLY_PROP_SERIAL_NUMBER, + POWER_SUPPLY_PROP_HEALTH, }; static unsigned int poll_interval = 360; @@ -150,6 +153,31 @@ static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg, return di->bus.read(di, reg, single); } +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 Relative State-of-Charge * Or < 0 if something fails. @@ -594,6 +622,9 @@ 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; } |