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bq27x00_battery: Report -ENODATA if bq27000 battery was not calibrated 

* CI (Capacity Inaccurate) flag is set after full reset on bq27000 battery
* when is set, all capacity properties should be reported incorrectly,
  because there was no learning cycle and battery was not calibrated
* instead reporting incorrect values, report -ENODATA

Signed-off-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>
This commit is contained in:
Pali Rohár 2011-11-01 01:43:05 +01:00 committed by Anton Vorontsov
parent d66bab3f3a
commit 4b226c2cf0
1 changed files with 14 additions and 5 deletions
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19
drivers/power/bq27x00_battery.c
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@ -56,6 +56,7 @@
#define BQ27000_REG_ILMD 0x76 /* Initial last measured discharge */
#define BQ27000_FLAG_EDVF BIT(0) /* Final End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_EDV1 BIT(1) /* First End-of-Discharge-Voltage flag */
#define BQ27000_FLAG_CI BIT(4) /* Capacity Inaccurate flag */
#define BQ27000_FLAG_FC BIT(5)
#define BQ27000_FLAG_CHGS BIT(7) /* Charge state flag */
@ -265,12 +266,20 @@ static void bq27x00_update(struct bq27x00_device_info *di)
cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, is_bq27500);
if (cache.flags >= 0) {
cache.capacity = bq27x00_battery_read_rsoc(di);
if (!is_bq27500 && (cache.flags & BQ27000_FLAG_CI)) {
cache.capacity = -ENODATA;
cache.time_to_empty = -ENODATA;
cache.time_to_empty_avg = -ENODATA;
cache.time_to_full = -ENODATA;
cache.charge_full = -ENODATA;
} else {
cache.capacity = bq27x00_battery_read_rsoc(di);
cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE);
cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP);
cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF);
cache.charge_full = bq27x00_battery_read_lmd(di);
}
cache.temperature = bq27x00_read(di, BQ27x00_REG_TEMP, false);
cache.time_to_empty = bq27x00_battery_read_time(di, BQ27x00_REG_TTE);
cache.time_to_empty_avg = bq27x00_battery_read_time(di, BQ27x00_REG_TTECP);
cache.time_to_full = bq27x00_battery_read_time(di, BQ27x00_REG_TTF);
cache.charge_full = bq27x00_battery_read_lmd(di);
cache.cycle_count = bq27x00_battery_read_cyct(di);
/* We only have to read charge design full once */