drivers/acpi/sbs.c

Source file repositories/reference/linux-study-clean/drivers/acpi/sbs.c

File Facts

System
Linux kernel
Corpus path
drivers/acpi/sbs.c
Extension
.c
Size
19309 bytes
Lines
718
Domain
Driver Families
Bucket
drivers/acpi
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 acpi_battery {
	struct power_supply *bat;
	struct power_supply_desc bat_desc;
	struct acpi_sbs *sbs;
	unsigned long update_time;
	char name[8];
	char manufacturer_name[ACPI_SBS_BLOCK_MAX];
	char device_name[ACPI_SBS_BLOCK_MAX];
	char device_chemistry[ACPI_SBS_BLOCK_MAX];
	u16 alarm_capacity;
	u16 full_charge_capacity;
	u16 design_capacity;
	u16 design_voltage;
	u16 serial_number;
	u16 cycle_count;
	u16 temp_now;
	u16 voltage_now;
	s16 rate_now;
	s16 rate_avg;
	u16 capacity_now;
	u16 state_of_charge;
	u16 state;
	u16 mode;
	u16 spec;
	u8 id;
	u8 present:1;
};

#define to_acpi_battery(x) power_supply_get_drvdata(x)

struct acpi_sbs {
	struct power_supply *charger;
	struct acpi_device *device;
	struct acpi_smb_hc *hc;
	struct mutex lock;
	struct acpi_battery battery[MAX_SBS_BAT];
	u8 batteries_supported:4;
	u8 manager_present:1;
	u8 charger_present:1;
	u8 charger_exists:1;
};

#define to_acpi_sbs(x) power_supply_get_drvdata(x)

static void acpi_sbs_remove(struct platform_device *pdev);
static int acpi_battery_get_state(struct acpi_battery *battery);

static inline int battery_scale(int log)
{
	int scale = 1;
	while (log--)
		scale *= 10;
	return scale;
}

static inline int acpi_battery_vscale(struct acpi_battery *battery)
{
	return battery_scale((battery->spec & 0x0f00) >> 8);
}

static inline int acpi_battery_ipscale(struct acpi_battery *battery)
{
	return battery_scale((battery->spec & 0xf000) >> 12);
}

static inline int acpi_battery_mode(struct acpi_battery *battery)
{
	return (battery->mode & 0x8000);
}

static inline int acpi_battery_scale(struct acpi_battery *battery)
{
	return (acpi_battery_mode(battery) ? 10 : 1) *
	    acpi_battery_ipscale(battery);
}

static int sbs_get_ac_property(struct power_supply *psy,
			       enum power_supply_property psp,
			       union power_supply_propval *val)
{
	struct acpi_sbs *sbs = to_acpi_sbs(psy);
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = sbs->charger_present;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

Annotation

Implementation Notes