drivers/hwmon/occ/common.h

Source file repositories/reference/linux-study-clean/drivers/hwmon/occ/common.h

File Facts

System
Linux kernel
Corpus path
drivers/hwmon/occ/common.h
Extension
.h
Size
3068 bytes
Lines
137
Domain
Driver Families
Bucket
drivers/hwmon
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 occ_response {
	u8 seq_no;
	u8 cmd_type;
	u8 return_status;
	__be16 data_length;
	u8 data[OCC_RESP_DATA_BYTES];
	__be16 checksum;
} __packed;

struct occ_sensor_data_block_header {
	u8 eye_catcher[4];
	u8 reserved;
	u8 sensor_format;
	u8 sensor_length;
	u8 num_sensors;
} __packed;

struct occ_sensor_data_block {
	struct occ_sensor_data_block_header header;
	u32 data;
} __packed;

struct occ_poll_response_header {
	u8 status;
	u8 ext_status;
	u8 occs_present;
	u8 config_data;
	u8 occ_state;
	u8 mode;
	u8 ips_status;
	u8 error_log_id;
	__be32 error_log_start_address;
	__be16 error_log_length;
	u16 reserved;
	u8 occ_code_level[16];
	u8 eye_catcher[6];
	u8 num_sensor_data_blocks;
	u8 sensor_data_block_header_version;
} __packed;

struct occ_poll_response {
	struct occ_poll_response_header header;
	struct occ_sensor_data_block block;
} __packed;

struct occ_sensor {
	u8 num_sensors;
	u8 version;
	void *data;	/* pointer to sensor data start within response */
};

/*
 * OCC only provides one sensor data block of each type, but any number of
 * sensors within that block.
 */
struct occ_sensors {
	struct occ_sensor temp;
	struct occ_sensor freq;
	struct occ_sensor power;
	struct occ_sensor caps;
	struct occ_sensor extended;
};

/*
 * Use our own attribute struct so we can dynamically allocate space for the
 * name.
 */
struct occ_attribute {
	char name[32];
	struct sensor_device_attribute_2 sensor;
};

struct occ {
	struct device *bus_dev;

	struct occ_response resp;
	struct occ_sensors sensors;

	int powr_sample_time_us;	/* average power sample time */
	u8 poll_cmd_data;		/* to perform OCC poll command */
	int (*send_cmd)(struct occ *occ, u8 *cmd, size_t len, void *resp,
			size_t resp_len);

	unsigned long next_update;
	struct mutex lock;		/* lock OCC access */

	struct device *hwmon;
	struct occ_attribute *attrs;
	struct attribute_group group;
	const struct attribute_group *groups[2];

Annotation

Implementation Notes