drivers/power/supply/pf1550-charger.c

Source file repositories/reference/linux-study-clean/drivers/power/supply/pf1550-charger.c

File Facts

System
Linux kernel
Corpus path
drivers/power/supply/pf1550-charger.c
Extension
.c
Size
16114 bytes
Lines
642
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 pf1550_charger {
	struct device *dev;
	const struct pf1550_ddata *pf1550;
	struct power_supply *charger;
	struct power_supply *battery;
	struct delayed_work vbus_sense_work;
	struct delayed_work chg_sense_work;
	struct delayed_work bat_sense_work;
	int virqs[PF1550_CHARGER_IRQ_NR];

	u32 constant_volt;
	u32 min_system_volt;
	u32 thermal_regulation_temp;
};

static int pf1550_get_charger_state(struct regmap *regmap, int *val)
{
	unsigned int data;
	int ret;

	ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data);
	if (ret < 0)
		return ret;

	data &= PF1550_CHG_SNS_MASK;

	switch (data) {
	case PF1550_CHG_PRECHARGE:
	case PF1550_CHG_CONSTANT_CURRENT:
	case PF1550_CHG_CONSTANT_VOL:
	case PF1550_CHG_EOC:
		*val = POWER_SUPPLY_STATUS_CHARGING;
		break;
	case PF1550_CHG_DONE:
		*val = POWER_SUPPLY_STATUS_FULL;
		break;
	case PF1550_CHG_TIMER_FAULT:
	case PF1550_CHG_SUSPEND:
		*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
		break;
	case PF1550_CHG_OFF_INV:
	case PF1550_CHG_OFF_TEMP:
	case PF1550_CHG_LINEAR_ONLY:
		*val = POWER_SUPPLY_STATUS_DISCHARGING;
		break;
	default:
		*val = POWER_SUPPLY_STATUS_UNKNOWN;
	}

	return 0;
}

static int pf1550_get_charge_type(struct regmap *regmap, int *val)
{
	unsigned int data;
	int ret;

	ret = regmap_read(regmap, PF1550_CHARG_REG_CHG_SNS, &data);
	if (ret < 0)
		return ret;

	data &= PF1550_CHG_SNS_MASK;

	switch (data) {
	case PF1550_CHG_SNS_MASK:
		*val = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
		break;
	case PF1550_CHG_CONSTANT_CURRENT:
	case PF1550_CHG_CONSTANT_VOL:
	case PF1550_CHG_EOC:
		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
		break;
	case PF1550_CHG_DONE:
	case PF1550_CHG_TIMER_FAULT:
	case PF1550_CHG_SUSPEND:
	case PF1550_CHG_OFF_INV:
	case PF1550_CHG_BAT_OVER:
	case PF1550_CHG_OFF_TEMP:
	case PF1550_CHG_LINEAR_ONLY:
		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
		break;
	default:
		*val = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
	}

	return 0;
}

/*
 * Supported health statuses:

Annotation

Implementation Notes