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power: supply: sbs-battery: add POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED support

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Add support for reporting the SBS battery's condition flag
to userspace using the new "Calibration required" health status.

Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Sebastian Reichel 2020-05-13 20:56:09 +02:00 committed by Sebastian Reichel
parent 7721c2fd26
commit 6f72a07aa6
1 changed files with 24 additions and 3 deletions
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27
drivers/power/supply/sbs-battery.c
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@ -23,6 +23,7 @@
enum {
REG_MANUFACTURER_DATA,
REG_BATTERY_MODE,
REG_TEMPERATURE,
REG_VOLTAGE,
REG_CURRENT_NOW,
@ -94,6 +95,8 @@ static const struct chip_data {
} sbs_data[] = {
[REG_MANUFACTURER_DATA] =
SBS_DATA(POWER_SUPPLY_PROP_PRESENT, 0x00, 0, 65535),
[REG_BATTERY_MODE] =
SBS_DATA(-1, 0x03, 0, 65535),
[REG_TEMPERATURE] =
SBS_DATA(POWER_SUPPLY_PROP_TEMP, 0x08, 0, 65535),
[REG_VOLTAGE] =
@ -366,6 +369,17 @@ static int sbs_status_correct(struct i2c_client *client, int *intval)
return 0;
}
static bool sbs_bat_needs_calibration(struct i2c_client *client)
{
int ret;
ret = sbs_read_word_data(client, sbs_data[REG_BATTERY_MODE].addr);
if (ret < 0)
return false;
return !!(ret & BIT(7));
}
static int sbs_get_battery_presence_and_health(
struct i2c_client *client, enum power_supply_property psp,
union power_supply_propval *val)
@ -385,9 +399,14 @@ static int sbs_get_battery_presence_and_health(
if (psp == POWER_SUPPLY_PROP_PRESENT)
val->intval = 1; /* battery present */
else /* POWER_SUPPLY_PROP_HEALTH */
/* SBS spec doesn't have a general health command. */
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
else { /* POWER_SUPPLY_PROP_HEALTH */
if (sbs_bat_needs_calibration(client)) {
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
} else {
/* SBS spec doesn't have a general health command. */
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
}
}
return 0;
}
@ -441,6 +460,8 @@ static int sbs_get_ti_battery_presence_and_health(
val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
else if (ret == 0x0C)
val->intval = POWER_SUPPLY_HEALTH_DEAD;
else if (sbs_bat_needs_calibration(client))
val->intval = POWER_SUPPLY_HEALTH_CALIBRATION_REQUIRED;
else
val->intval = POWER_SUPPLY_HEALTH_GOOD;
}