drivers/power/supply/cros_usbpd-charger.c

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

File Facts

System
Linux kernel
Corpus path
drivers/power/supply/cros_usbpd-charger.c
Extension
.c
Size
20104 bytes
Lines
728
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 port_data {
	int port_number;
	char name[CHARGER_DIR_NAME_LENGTH];
	char manufacturer[CHARGER_MANUFACTURER_MODEL_LENGTH];
	char model_name[CHARGER_MANUFACTURER_MODEL_LENGTH];
	struct power_supply *psy;
	struct power_supply_desc psy_desc;
	int psy_usb_type;
	int psy_online;
	int psy_status;
	int psy_current_max;
	int psy_voltage_max_design;
	int psy_voltage_now;
	int psy_power_max;
	struct charger_data *charger;
	unsigned long last_update;
};

struct charger_data {
	struct device *dev;
	struct cros_ec_dev *ec_dev;
	struct cros_ec_device *ec_device;
	int num_charger_ports;
	int num_usbpd_ports;
	int num_registered_psy;
	struct port_data *ports[EC_USB_PD_MAX_PORTS];
	struct notifier_block notifier;
};

static enum power_supply_property cros_usbpd_charger_props[] = {
	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
	POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_CURRENT_MAX,
	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_MANUFACTURER,
	POWER_SUPPLY_PROP_USB_TYPE
};

static enum power_supply_property cros_usbpd_dedicated_charger_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
};

/* Input voltage/current limit in mV/mA. Default to none. */
static u16 input_voltage_limit = EC_POWER_LIMIT_NONE;
static u16 input_current_limit = EC_POWER_LIMIT_NONE;

static bool cros_usbpd_charger_port_is_dedicated(struct port_data *port)
{
	return port->port_number >= port->charger->num_usbpd_ports;
}

static int cros_usbpd_charger_ec_command(struct charger_data *charger,
					 unsigned int version,
					 unsigned int command,
					 void *outdata,
					 unsigned int outsize,
					 void *indata,
					 unsigned int insize)
{
	struct cros_ec_dev *ec_dev = charger->ec_dev;
	struct cros_ec_command *msg;
	int ret;

	msg = kzalloc_flex(*msg, data, max(outsize, insize));
	if (!msg)
		return -ENOMEM;

	msg->version = version;
	msg->command = ec_dev->cmd_offset + command;
	msg->outsize = outsize;
	msg->insize = insize;

	if (outsize)
		memcpy(msg->data, outdata, outsize);

	ret = cros_ec_cmd_xfer_status(charger->ec_device, msg);
	if (ret >= 0 && insize)
		memcpy(indata, msg->data, insize);

	kfree(msg);
	return ret;
}

static int cros_usbpd_charger_get_num_ports(struct charger_data *charger)

Annotation

Implementation Notes