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path: root/drivers/power/max14577_charger.c
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Diffstat (limited to 'drivers/power/max14577_charger.c')
-rw-r--r--drivers/power/max14577_charger.c148
1 files changed, 92 insertions, 56 deletions
diff --git a/drivers/power/max14577_charger.c b/drivers/power/max14577_charger.c
index ef4103ee6021..a36bcaf62dd4 100644
--- a/drivers/power/max14577_charger.c
+++ b/drivers/power/max14577_charger.c
@@ -22,12 +22,9 @@
#include <linux/mfd/max14577.h>
struct max14577_charger {
- struct device *dev;
- struct max14577 *max14577;
- struct power_supply charger;
-
- unsigned int charging_state;
- unsigned int battery_state;
+ struct device *dev;
+ struct max14577 *max14577;
+ struct power_supply *charger;
struct max14577_charger_platform_data *pdata;
};
@@ -57,10 +54,10 @@ static enum max14577_muic_charger_type maxim_get_charger_type(
}
}
-static int max14577_get_charger_state(struct max14577_charger *chg)
+static int max14577_get_charger_state(struct max14577_charger *chg, int *val)
{
struct regmap *rmap = chg->max14577->regmap;
- int state = POWER_SUPPLY_STATUS_DISCHARGING;
+ int ret;
u8 reg_data;
/*
@@ -74,23 +71,32 @@ static int max14577_get_charger_state(struct max14577_charger *chg)
* - handle properly dead-battery charging (respect timer)
* - handle timers (fast-charge and prequal) /MBCCHGERR/
*/
- max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
- if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
- goto state_set;
+ ret = max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
+ if (ret < 0)
+ goto out;
+
+ if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0) {
+ *val = POWER_SUPPLY_STATUS_DISCHARGING;
+ goto out;
+ }
+
+ ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+ if (ret < 0)
+ goto out;
- max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
if (reg_data & STATUS3_CGMBC_MASK) {
/* Charger or USB-cable is connected */
if (reg_data & STATUS3_EOC_MASK)
- state = POWER_SUPPLY_STATUS_FULL;
+ *val = POWER_SUPPLY_STATUS_FULL;
else
- state = POWER_SUPPLY_STATUS_CHARGING;
- goto state_set;
+ *val = POWER_SUPPLY_STATUS_CHARGING;
+ goto out;
}
-state_set:
- chg->charging_state = state;
- return state;
+ *val = POWER_SUPPLY_STATUS_DISCHARGING;
+
+out:
+ return ret;
}
/*
@@ -98,8 +104,10 @@ state_set:
* - POWER_SUPPLY_CHARGE_TYPE_NONE
* - POWER_SUPPLY_CHARGE_TYPE_FAST
*/
-static int max14577_get_charge_type(struct max14577_charger *chg)
+static int max14577_get_charge_type(struct max14577_charger *chg, int *val)
{
+ int ret, charging;
+
/*
* TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
* As spec says:
@@ -108,18 +116,29 @@ static int max14577_get_charge_type(struct max14577_charger *chg)
* top-off timer starts. The device continues to trickle
* charge the battery until the top-off timer runs out."
*/
- if (max14577_get_charger_state(chg) == POWER_SUPPLY_STATUS_CHARGING)
- return POWER_SUPPLY_CHARGE_TYPE_FAST;
- return POWER_SUPPLY_CHARGE_TYPE_NONE;
+ ret = max14577_get_charger_state(chg, &charging);
+ if (ret < 0)
+ return ret;
+
+ if (charging == POWER_SUPPLY_STATUS_CHARGING)
+ *val = POWER_SUPPLY_CHARGE_TYPE_FAST;
+ else
+ *val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+
+ return 0;
}
-static int max14577_get_online(struct max14577_charger *chg)
+static int max14577_get_online(struct max14577_charger *chg, int *val)
{
struct regmap *rmap = chg->max14577->regmap;
u8 reg_data;
+ int ret;
enum max14577_muic_charger_type chg_type;
- max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ if (ret < 0)
+ return ret;
+
reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
switch (chg_type) {
@@ -129,14 +148,17 @@ static int max14577_get_online(struct max14577_charger *chg)
case MAX14577_CHARGER_TYPE_SPECIAL_1A:
case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
case MAX77836_CHARGER_TYPE_SPECIAL_BIAS:
- return 1;
+ *val = 1;
+ break;
case MAX14577_CHARGER_TYPE_NONE:
case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
case MAX14577_CHARGER_TYPE_RESERVED:
case MAX77836_CHARGER_TYPE_RESERVED:
default:
- return 0;
+ *val = 0;
}
+
+ return 0;
}
/*
@@ -145,30 +167,38 @@ static int max14577_get_online(struct max14577_charger *chg)
* - POWER_SUPPLY_HEALTH_OVERVOLTAGE
* - POWER_SUPPLY_HEALTH_GOOD
*/
-static int max14577_get_battery_health(struct max14577_charger *chg)
+static int max14577_get_battery_health(struct max14577_charger *chg, int *val)
{
struct regmap *rmap = chg->max14577->regmap;
- int state = POWER_SUPPLY_HEALTH_GOOD;
+ int ret;
u8 reg_data;
enum max14577_muic_charger_type chg_type;
- max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ ret = max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ if (ret < 0)
+ goto out;
+
reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
chg_type = maxim_get_charger_type(chg->max14577->dev_type, reg_data);
if (chg_type == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
- state = POWER_SUPPLY_HEALTH_DEAD;
- goto state_set;
+ *val = POWER_SUPPLY_HEALTH_DEAD;
+ goto out;
}
- max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+ ret = max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+ if (ret < 0)
+ goto out;
+
if (reg_data & STATUS3_OVP_MASK) {
- state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
- goto state_set;
+ *val = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ goto out;
}
-state_set:
- chg->battery_state = state;
- return state;
+ /* Not dead, not overvoltage */
+ *val = POWER_SUPPLY_HEALTH_GOOD;
+
+out:
+ return ret;
}
/*
@@ -176,9 +206,11 @@ state_set:
* The max14577 chip doesn't report any status of battery presence.
* Lets assume that it will always be used with some battery.
*/
-static int max14577_get_present(struct max14577_charger *chg)
+static int max14577_get_present(struct max14577_charger *chg, int *val)
{
- return 1;
+ *val = 1;
+
+ return 0;
}
static int max14577_set_fast_charge_timer(struct max14577_charger *chg,
@@ -389,26 +421,24 @@ static int max14577_charger_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
- struct max14577_charger *chg = container_of(psy,
- struct max14577_charger,
- charger);
+ struct max14577_charger *chg = power_supply_get_drvdata(psy);
int ret = 0;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
- val->intval = max14577_get_charger_state(chg);
+ ret = max14577_get_charger_state(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_CHARGE_TYPE:
- val->intval = max14577_get_charge_type(chg);
+ ret = max14577_get_charge_type(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_HEALTH:
- val->intval = max14577_get_battery_health(chg);
+ ret = max14577_get_battery_health(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_PRESENT:
- val->intval = max14577_get_present(chg);
+ ret = max14577_get_present(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_ONLINE:
- val->intval = max14577_get_online(chg);
+ ret = max14577_get_online(chg, &val->intval);
break;
case POWER_SUPPLY_PROP_MODEL_NAME:
BUILD_BUG_ON(ARRAY_SIZE(model_names) != MAXIM_DEVICE_TYPE_NUM);
@@ -424,6 +454,14 @@ static int max14577_charger_get_property(struct power_supply *psy,
return ret;
}
+static const struct power_supply_desc max14577_charger_desc = {
+ .name = "max14577-charger",
+ .type = POWER_SUPPLY_TYPE_BATTERY,
+ .properties = max14577_charger_props,
+ .num_properties = ARRAY_SIZE(max14577_charger_props),
+ .get_property = max14577_charger_get_property,
+};
+
#ifdef CONFIG_OF
static struct max14577_charger_platform_data *max14577_charger_dt_init(
struct platform_device *pdev)
@@ -531,6 +569,7 @@ static DEVICE_ATTR(fast_charge_timer, S_IRUGO | S_IWUSR,
static int max14577_charger_probe(struct platform_device *pdev)
{
struct max14577_charger *chg;
+ struct power_supply_config psy_cfg = {};
struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
int ret;
@@ -550,21 +589,18 @@ static int max14577_charger_probe(struct platform_device *pdev)
if (ret)
return ret;
- chg->charger.name = "max14577-charger",
- chg->charger.type = POWER_SUPPLY_TYPE_BATTERY,
- chg->charger.properties = max14577_charger_props,
- chg->charger.num_properties = ARRAY_SIZE(max14577_charger_props),
- chg->charger.get_property = max14577_charger_get_property,
-
ret = device_create_file(&pdev->dev, &dev_attr_fast_charge_timer);
if (ret) {
dev_err(&pdev->dev, "failed: create sysfs entry\n");
return ret;
}
- ret = power_supply_register(&pdev->dev, &chg->charger);
- if (ret) {
+ psy_cfg.drv_data = chg;
+ chg->charger = power_supply_register(&pdev->dev, &max14577_charger_desc,
+ &psy_cfg);
+ if (IS_ERR(chg->charger)) {
dev_err(&pdev->dev, "failed: power supply register\n");
+ ret = PTR_ERR(chg->charger);
goto err;
}
@@ -585,7 +621,7 @@ static int max14577_charger_remove(struct platform_device *pdev)
struct max14577_charger *chg = platform_get_drvdata(pdev);
device_remove_file(&pdev->dev, &dev_attr_fast_charge_timer);
- power_supply_unregister(&chg->charger);
+ power_supply_unregister(chg->charger);
return 0;
}
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