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power: supply: bq27xxx: expose battery data when CI=1 

When the Capacity Inaccurate flag is set, the chip still provides data
about the battery, albeit inaccurate. Instead of discarding capacity
values for CI=1, expose the stale data and use the
POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED property to indicate that the
values should be used with care.

Reviewed-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Sicelo A. Mhlongo <absicsz@gmail.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sicelo A. Mhlongo 2022-04-20 14:30:59 +02:00 коммит произвёл Sebastian Reichel
Родитель 3123109284
Коммит 68fdbe090c
1 изменённых файлов: 26 добавлений и 32 удалений
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58
drivers/power/supply/bq27xxx_battery.c
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@ -1572,14 +1572,6 @@ static int bq27xxx_battery_read_charge(struct bq27xxx_device_info *di, u8 reg)
*/
static inline int bq27xxx_battery_read_nac(struct bq27xxx_device_info *di)
{
int flags;
if (di->opts & BQ27XXX_O_ZERO) {
flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, true);
if (flags >= 0 && (flags & BQ27000_FLAG_CI))
return -ENODATA;
}
return bq27xxx_battery_read_charge(di, BQ27XXX_REG_NAC);
}
@ -1742,6 +1734,18 @@ static bool bq27xxx_battery_dead(struct bq27xxx_device_info *di, u16 flags)
return flags & (BQ27XXX_FLAG_SOC1 | BQ27XXX_FLAG_SOCF);
}
/*
* Returns true if reported battery capacity is inaccurate
*/
static bool bq27xxx_battery_capacity_inaccurate(struct bq27xxx_device_info *di,
u16 flags)
{
if (di->opts & BQ27XXX_O_HAS_CI)
return (flags & BQ27000_FLAG_CI);
else
return false;
}
static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
{
/* Unlikely but important to return first */
@ -1751,6 +1755,8 @@ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
return POWER_SUPPLY_HEALTH_COLD;
if (unlikely(bq27xxx_battery_dead(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_DEAD;
if (unlikely(bq27xxx_battery_capacity_inaccurate(di, di->cache.flags)))
return POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
return POWER_SUPPLY_HEALTH_GOOD;
}
@ -1758,7 +1764,6 @@ static int bq27xxx_battery_read_health(struct bq27xxx_device_info *di)
void bq27xxx_battery_update(struct bq27xxx_device_info *di)
{
struct bq27xxx_reg_cache cache = {0, };
bool has_ci_flag = di->opts & BQ27XXX_O_HAS_CI;
bool has_singe_flag = di->opts & BQ27XXX_O_ZERO;
cache.flags = bq27xxx_read(di, BQ27XXX_REG_FLAGS, has_singe_flag);
@ -1766,30 +1771,19 @@ void bq27xxx_battery_update(struct bq27xxx_device_info *di)
cache.flags = -1; /* read error */
if (cache.flags >= 0) {
cache.temperature = bq27xxx_battery_read_temperature(di);
if (has_ci_flag && (cache.flags & BQ27000_FLAG_CI)) {
dev_info_once(di->dev, "battery is not calibrated! ignoring capacity values\n");
cache.capacity = -ENODATA;
cache.energy = -ENODATA;
cache.time_to_empty = -ENODATA;
cache.time_to_empty_avg = -ENODATA;
cache.time_to_full = -ENODATA;
cache.charge_full = -ENODATA;
cache.health = -ENODATA;
} else {
if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
if (di->regs[BQ27XXX_REG_TTE] != INVALID_REG_ADDR)
cache.time_to_empty = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTE);
if (di->regs[BQ27XXX_REG_TTECP] != INVALID_REG_ADDR)
cache.time_to_empty_avg = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTECP);
if (di->regs[BQ27XXX_REG_TTF] != INVALID_REG_ADDR)
cache.time_to_full = bq27xxx_battery_read_time(di, BQ27XXX_REG_TTF);
cache.charge_full = bq27xxx_battery_read_fcc(di);
cache.capacity = bq27xxx_battery_read_soc(di);
if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
cache.energy = bq27xxx_battery_read_energy(di);
di->cache.flags = cache.flags;
cache.health = bq27xxx_battery_read_health(di);
}
cache.charge_full = bq27xxx_battery_read_fcc(di);
cache.capacity = bq27xxx_battery_read_soc(di);
if (di->regs[BQ27XXX_REG_AE] != INVALID_REG_ADDR)
cache.energy = bq27xxx_battery_read_energy(di);
di->cache.flags = cache.flags;
cache.health = bq27xxx_battery_read_health(di);
if (di->regs[BQ27XXX_REG_CYCT] != INVALID_REG_ADDR)
cache.cycle_count = bq27xxx_battery_read_cyct(di);