drivers/power/supply/max77976_charger.c

Source file repositories/reference/linux-study-clean/drivers/power/supply/max77976_charger.c

File Facts

System
Linux kernel
Corpus path
drivers/power/supply/max77976_charger.c
Extension
.c
Size
13810 bytes
Lines
511
Domain
Driver Families
Bucket
drivers/power
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

struct max77976 {
	struct i2c_client	*client;
	struct regmap		*regmap;
	struct regmap_field	*rfield[MAX77976_N_REGMAP_FIELDS];
};

/* --------------------------------------------------------------------------
 * power_supply properties
 */

static int max77976_get_status(struct max77976 *chg, int *val)
{
	unsigned int regval;
	int err;

	err = regmap_field_read(chg->rfield[CHG_DTLS], &regval);
	if (err < 0)
		return err;

	switch (regval) {
	case MAX77976_CHARGING_PREQUALIFICATION:
	case MAX77976_CHARGING_FAST_CONST_CURRENT:
	case MAX77976_CHARGING_FAST_CONST_VOLTAGE:
	case MAX77976_CHARGING_TOP_OFF:
		*val = POWER_SUPPLY_STATUS_CHARGING;
		break;
	case MAX77976_CHARGING_DONE:
		*val = POWER_SUPPLY_STATUS_FULL;
		break;
	case MAX77976_CHARGING_TIMER_FAULT:
	case MAX77976_CHARGING_SUSPENDED_QBATT_OFF:
	case MAX77976_CHARGING_SUSPENDED_JEITA:
	case MAX77976_CHARGING_SUSPENDED_THM_REMOVAL:
	case MAX77976_CHARGING_SUSPENDED_PIN:
		*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
		break;
	case MAX77976_CHARGING_OFF:
	case MAX77976_CHARGING_THERMAL_SHUTDOWN:
	case MAX77976_CHARGING_WATCHDOG_EXPIRED:
		*val = POWER_SUPPLY_STATUS_DISCHARGING;
		break;
	default:
		*val = POWER_SUPPLY_STATUS_UNKNOWN;
	}

	return 0;
}

static int max77976_get_charge_type(struct max77976 *chg, int *val)
{
	unsigned int regval;
	int err;

	err = regmap_field_read(chg->rfield[CHG_DTLS], &regval);
	if (err < 0)
		return err;

	switch (regval) {
	case MAX77976_CHARGING_PREQUALIFICATION:
		*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
		break;
	case MAX77976_CHARGING_FAST_CONST_CURRENT:
	case MAX77976_CHARGING_FAST_CONST_VOLTAGE:
		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
		break;
	case MAX77976_CHARGING_TOP_OFF:
		*val = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
		break;
	case MAX77976_CHARGING_DONE:
	case MAX77976_CHARGING_TIMER_FAULT:
	case MAX77976_CHARGING_SUSPENDED_QBATT_OFF:
	case MAX77976_CHARGING_OFF:
	case MAX77976_CHARGING_THERMAL_SHUTDOWN:
	case MAX77976_CHARGING_WATCHDOG_EXPIRED:
	case MAX77976_CHARGING_SUSPENDED_JEITA:
	case MAX77976_CHARGING_SUSPENDED_THM_REMOVAL:
	case MAX77976_CHARGING_SUSPENDED_PIN:
		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
		break;
	default:
		*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
	}

	return 0;
}

static int max77976_get_health(struct max77976 *chg, int *val)
{
	unsigned int regval;
	int err;

Annotation

Implementation Notes