diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/supply/act8945a_charger.c | 79 |
1 files changed, 78 insertions, 1 deletions
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c index 48775f8233f3..2f875997d97a 100644 --- a/drivers/power/supply/act8945a_charger.c +++ b/drivers/power/supply/act8945a_charger.c @@ -18,6 +18,7 @@ #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/regmap.h> +#include <linux/gpio/consumer.h> static const char *act8945a_charger_model = "ACT8945A"; static const char *act8945a_charger_manufacturer = "Active-semi"; @@ -83,6 +84,7 @@ struct act8945a_charger { struct work_struct work; bool init_done; + struct gpio_desc *lbo_gpio; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -208,11 +210,67 @@ 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 = gpiod_get_value(charger->lbo_gpio); + + 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 +296,10 @@ 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; @@ -335,7 +397,7 @@ static int act8945a_charger_config(struct device *dev, u32 pre_time_out; u32 input_voltage_threshold; int chglev_pin; - int ret; + int err, ret; unsigned int tmp; unsigned int value = 0; @@ -354,6 +416,21 @@ static int act8945a_charger_config(struct device *dev, dev_info(dev, "have been suspended\n"); } + charger->lbo_gpio = devm_gpiod_get_optional(dev, "active-semi,lbo", + GPIOD_IN); + if (IS_ERR(charger->lbo_gpio)) { + err = PTR_ERR(charger->lbo_gpio); + dev_err(dev, "unable to claim gpio \"lbo\": %d\n", err); + return err; + } + + ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio), + act8945a_status_changed, + (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING), + "act8945a_lbo_detect", charger); + if (ret) + dev_info(dev, "failed to request gpio \"lbo\" IRQ\n"); + chglev_pin = of_get_named_gpio_flags(np, "active-semi,chglev-gpios", 0, &flags); |