drivers/w1/slaves/w1_therm.c

File Facts

System

Linux kernel

Corpus path

drivers/w1/slaves/w1_therm.c

Extension

.c

Size

57756 bytes

Lines

2192

Domain

Driver Families

Bucket

drivers/w1

Inferred role

Driver Families: exported/initcall integration point

Status

integration 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.

• 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.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• Allocates kernel memory; connect allocation flags and lifetime to context constraints.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• asm/types.h
• linux/kernel.h
• linux/module.h
• linux/moduleparam.h
• linux/sched.h
• linux/device.h
• linux/types.h
• linux/slab.h
• linux/delay.h
• linux/hwmon.h
• linux/string.h
• linux/jiffies.h
• linux/w1.h

Detected Declarations

• struct w1_therm_family_converter
• struct w1_therm_family_data
• struct therm_info
• function w1_is_visible
• function w1_read
• function w1_DS18B20_convert_time
• function w1_DS18S20_convert_time
• function w1_DS1825_convert_time
• function w1_DS18B20_write_data
• function w1_DS18S20_write_data
• function w1_DS18B20_set_resolution
• function w1_DS18B20_get_resolution
• function w1_DS18B20_convert_temp
• function w1_DS18S20_convert_temp
• function w1_DS1825_convert_temp
• function device_family
• function bus_mutex_lock
• function check_family_data
• function bulk_read_support
• function conversion_time
• function temperature_from_RAM
• function int_to_short
• function w1_therm_add_slave
• function w1_therm_remove_slave
• function reset_select_slave
• function w1_poll_completion
• function convert_t
• function conv_time_measure
• function read_scratchpad
• function write_scratchpad
• function copy_scratchpad
• function recall_eeprom
• function read_powermode
• function trigger_bulk_read
• function list_for_each_entry
• function w1_slave_show
• function w1_slave_store
• function temperature_show
• function ext_power_show
• function resolution_show
• function resolution_store
• function eeprom_cmd_store
• function alarms_show
• function alarms_store
• function therm_bulk_read_store
• function therm_bulk_read_show
• function list_for_each_entry
• function conv_time_show

Annotated Snippet

module_init(w1_therm_init);
module_exit(w1_therm_fini);

MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>");
MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol, temperature family.");
MODULE_LICENSE("GPL");
MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS18S20));
MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS1822));
MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS18B20));
MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS1825));
MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS28EA00));

Annotation

• Immediate include surface: `asm/types.h`, `linux/kernel.h`, `linux/module.h`, `linux/moduleparam.h`, `linux/sched.h`, `linux/device.h`, `linux/types.h`, `linux/slab.h`.
• Detected declarations: `struct w1_therm_family_converter`, `struct w1_therm_family_data`, `struct therm_info`, `function w1_is_visible`, `function w1_read`, `function w1_DS18B20_convert_time`, `function w1_DS18S20_convert_time`, `function w1_DS1825_convert_time`, `function w1_DS18B20_write_data`, `function w1_DS18S20_write_data`.
• Atlas domain: Driver Families / drivers/w1.
• Implementation status: integration implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.