mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 05:48:40 +00:00
power: supply: act8945a_charger: Add capacity level property
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.yang@atmel.com> Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
parent
3095365080
commit
369eba0986
1 changed files with 78 additions and 1 deletions
|
@ -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);
|
||||
|
||||
|
|
Loading…
Reference in a new issue