Add the power supply capacity level property, it corresponds to
POWER_SUPPLY_CAPACITY_LEVEL_*.
It also utilizes the precision voltage detector function module
to catch the low battery voltage.
Signed-off-by: Wenyou Yang <wenyou.y...@atmel.com>
---
Changes in v4:
- Change devname of devm_request_irq() from "lbo-detect" to
"act8945a, lbo-detect".
Changes in v3: None
Changes in v2: None
drivers/power/act8945a_charger.c | 78 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 78 insertions(+)
diff --git a/drivers/power/act8945a_charger.c b/drivers/power/act8945a_charger.c
index a3d89be..2321796 100644
--- a/drivers/power/act8945a_charger.c
+++ b/drivers/power/act8945a_charger.c
@@ -83,6 +83,7 @@ struct act8945a_charger {
struct work_struct work;
bool init_done;
+ int lbo_pin;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@@ -208,11 +209,70 @@ static int act8945a_get_battery_health(struct regmap
*regmap, int *val)
return 0;
}
+static int act8945a_get_capacity_level(struct act8945a_charger *charger,
+ struct regmap *regmap, int *val)
+{
+ int ret;
+ unsigned int status, state, config;
+ int lbo_level = 1;
+
+ if (gpio_is_valid(charger->lbo_pin))
+ lbo_level = gpio_get_value(charger->lbo_pin);
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
+ if (ret < 0)
+ return ret;
+
+ state &= APCH_STATE_CSTATE;
+ state >>= APCH_STATE_CSTATE_SHIFT;
+
+ switch (state) {
+ case APCH_STATE_CSTATE_PRE:
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ break;
+ case APCH_STATE_CSTATE_FAST:
+ if (lbo_level)
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
+ else
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ break;
+ case APCH_STATE_CSTATE_EOC:
+ if (status & APCH_STATUS_CHGDAT)
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
+ case APCH_STATE_CSTATE_DISABLED:
+ default:
+ if (config & APCH_CFG_SUSCHG) {
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ } else {
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ if (!(status & APCH_STATUS_INDAT)) {
+ if (!lbo_level)
+ *val =
POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ }
+ }
+ break;
+ }
+
+ return 0;
+}
+
static enum power_supply_property act8945a_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER
};
@@ -238,6 +298,10 @@ static int act8945a_charger_get_property(struct
power_supply *psy,
case POWER_SUPPLY_PROP_HEALTH:
ret = act8945a_get_battery_health(regmap, &val->intval);
break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ ret = act8945a_get_capacity_level(charger,
+ regmap, &val->intval);
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = act8945a_charger_model;
break;
@@ -352,6 +416,20 @@ static int act8945a_charger_config(struct device *dev,
if (tmp & APCH_CFG_SUSCHG)
value |= APCH_CFG_SUSCHG;
+ charger->lbo_pin = of_get_named_gpio(np, "active-semi,lbo-gpios", 0);
+ if (gpio_is_valid(charger->lbo_pin)) {
+ if (!devm_gpio_request(dev, charger->lbo_pin, "lbo-detect")) {
+ ret = devm_request_irq(dev,
+ gpio_to_irq(charger->lbo_pin),
+ act8945a_status_changed,
+ IRQF_TRIGGER_FALLING |
+ IRQF_TRIGGER_RISING,
+ "act8945a, lbo-detect", charger);
+ if (ret)
+ dev_dbg(dev, "failed to request LBO pin IRQ\n");
+ }
+ }
+
chglev_pin = of_get_named_gpio_flags(np,
"active-semi,chglev-gpios", 0, &flags);
--
2.7.4
