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Commit 369eba09 authored by Wenyou Yang's avatar Wenyou Yang Committed by Sebastian Reichel
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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: default avatarWenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 30953650

drivers/power/supply/act8945a_charger.c

+78 −1
Original line number Original line Diff line number Diff line
@@ -18,6 +18,7 @@ 
#include <linux/platform_device.h>

#include <linux/platform_device.h>

#include <linux/power_supply.h>

#include <linux/power_supply.h>

#include <linux/regmap.h>

#include <linux/regmap.h>

#include <linux/gpio/consumer.h>





static const char *act8945a_charger_model = "ACT8945A";

static const char *act8945a_charger_model = "ACT8945A";

static const char *act8945a_charger_manufacturer = "Active-semi";

static const char *act8945a_charger_manufacturer = "Active-semi";
@@ -83,6 +84,7 @@ struct act8945a_charger { 
	struct work_struct work;

	struct work_struct work;





	bool init_done;

	bool init_done;

	struct gpio_desc *lbo_gpio;

};

};





static int act8945a_get_charger_state(struct regmap *regmap, int *val)

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;

	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[] = {

static enum power_supply_property act8945a_charger_props[] = {

	POWER_SUPPLY_PROP_STATUS,

	POWER_SUPPLY_PROP_STATUS,

	POWER_SUPPLY_PROP_CHARGE_TYPE,

	POWER_SUPPLY_PROP_CHARGE_TYPE,

	POWER_SUPPLY_PROP_TECHNOLOGY,

	POWER_SUPPLY_PROP_TECHNOLOGY,

	POWER_SUPPLY_PROP_HEALTH,

	POWER_SUPPLY_PROP_HEALTH,

	POWER_SUPPLY_PROP_CAPACITY_LEVEL,

	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER

	POWER_SUPPLY_PROP_MANUFACTURER

};

};
@@ -238,6 +296,10 @@ static int act8945a_charger_get_property(struct power_supply *psy, 
	case POWER_SUPPLY_PROP_HEALTH:

	case POWER_SUPPLY_PROP_HEALTH:

		ret = act8945a_get_battery_health(regmap, &val->intval);

		ret = act8945a_get_battery_health(regmap, &val->intval);

		break;

		break;

	case POWER_SUPPLY_PROP_CAPACITY_LEVEL:

		ret = act8945a_get_capacity_level(charger,

						  regmap, &val->intval);

		break;

	case POWER_SUPPLY_PROP_MODEL_NAME:

	case POWER_SUPPLY_PROP_MODEL_NAME:

		val->strval = act8945a_charger_model;

		val->strval = act8945a_charger_model;

		break;

		break;
@@ -335,7 +397,7 @@ static int act8945a_charger_config(struct device *dev, 
	u32 pre_time_out;

	u32 pre_time_out;

	u32 input_voltage_threshold;

	u32 input_voltage_threshold;

	int chglev_pin;

	int chglev_pin;

	int ret;

	int err, ret;





	unsigned int tmp;

	unsigned int tmp;

	unsigned int value = 0;

	unsigned int value = 0;
@@ -354,6 +416,21 @@ static int act8945a_charger_config(struct device *dev, 
		dev_info(dev, "have been suspended\n");

		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,

	chglev_pin = of_get_named_gpio_flags(np,

				"active-semi,chglev-gpios", 0, &flags);

				"active-semi,chglev-gpios", 0, &flags);