drivers/power/supply/max77759_charger.c

Source file repositories/reference/linux-study-clean/drivers/power/supply/max77759_charger.c

File Facts

System
Linux kernel
Corpus path
drivers/power/supply/max77759_charger.c
Extension
.c
Size
19800 bytes
Lines
775
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 max77759_charger {
	struct device *dev;
	struct regmap *regmap;
	struct power_supply *psy;
	struct regulator_dev *chgin_otg_rdev;
	struct notifier_block nb;
	struct power_supply *tcpm_psy;
	struct delayed_work psy_work;
	struct mutex retry_lock; /* Protects psy_work_retry_cnt */
	u32 psy_work_retry_cnt;
	int irqs[NUM_IRQS];
	struct mutex lock; /* protects the state below */
	enum max77759_chgr_mode mode;
};

static inline int unlock_prot_regs(struct max77759_charger *chg, bool unlock)
{
	return regmap_update_bits(chg->regmap, MAX77759_CHGR_REG_CHG_CNFG_06,
				  MAX77759_CHGR_REG_CHG_CNFG_06_CHGPROT, unlock
				  ? MAX77759_CHGR_REG_CHG_CNFG_06_CHGPROT : 0);
}

static int charger_input_valid(struct max77759_charger *chg)
{
	u32 val;
	int ret;

	ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_INT_OK, &val);
	if (ret)
		return ret;

	return (val & MAX77759_CHGR_REG_CHG_INT_CHG) &&
		(val & MAX77759_CHGR_REG_CHG_INT_CHGIN);
}

static int get_online(struct max77759_charger *chg)
{
	u32 val;
	int ret;

	ret = charger_input_valid(chg);
	if (ret <= 0)
		return ret;

	ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_02, &val);
	if (ret)
		return ret;

	guard(mutex)(&chg->lock);

	return (val & MAX77759_CHGR_REG_CHG_DETAILS_02_CHGIN_STS) &&
		(chg->mode == MAX77759_CHGR_MODE_CHG_BUCK_ON);
}

static int get_status(struct max77759_charger *chg)
{
	u32 val;
	int ret;

	ret = regmap_read(chg->regmap, MAX77759_CHGR_REG_CHG_DETAILS_01, &val);
	if (ret)
		return ret;

	switch (FIELD_GET(MAX77759_CHGR_REG_CHG_DETAILS_01_CHG_DTLS, val)) {
	case MAX77759_CHGR_CHG_DTLS_PREQUAL:
	case MAX77759_CHGR_CHG_DTLS_CC:
	case MAX77759_CHGR_CHG_DTLS_CV:
	case MAX77759_CHGR_CHG_DTLS_TO:
		return POWER_SUPPLY_STATUS_CHARGING;
	case MAX77759_CHGR_CHG_DTLS_DONE:
		return POWER_SUPPLY_STATUS_FULL;
	case MAX77759_CHGR_CHG_DTLS_TIMER_FAULT:
	case MAX77759_CHGR_CHG_DTLS_SUSP_BATT_THM:
	case MAX77759_CHGR_CHG_DTLS_OFF_WDOG_TIMER:
	case MAX77759_CHGR_CHG_DTLS_SUSP_JEITA:
		return POWER_SUPPLY_STATUS_NOT_CHARGING;
	case MAX77759_CHGR_CHG_DTLS_OFF:
		return POWER_SUPPLY_STATUS_DISCHARGING;
	default:
		break;
	}

	return POWER_SUPPLY_STATUS_UNKNOWN;
}

static int get_charge_type(struct max77759_charger *chg)
{
	u32 val;
	int ret;

Annotation

Implementation Notes