drivers/hwmon/lm78.c

File Facts

System

Linux kernel

Corpus path

drivers/hwmon/lm78.c

Extension

.c

Size

27469 bytes

Lines

1033

Domain

Driver Families

Bucket

drivers/hwmon

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

• linux/module.h
• linux/init.h
• linux/slab.h
• linux/jiffies.h
• linux/i2c.h
• linux/hwmon.h
• linux/hwmon-vid.h
• linux/hwmon-sysfs.h
• linux/err.h
• linux/mutex.h
• linux/platform_device.h
• linux/ioport.h
• linux/io.h

Detected Declarations

• struct lm78_data
• enum chips
• function IN_TO_REG
• function FAN_TO_REG
• function FAN_FROM_REG
• function TEMP_TO_REG
• function TEMP_FROM_REG
• function in_show
• function in_min_show
• function in_max_show
• function in_min_store
• function in_max_store
• function temp1_input_show
• function temp1_max_show
• function temp1_max_store
• function temp1_max_hyst_show
• function temp1_max_hyst_store
• function fan_show
• function fan_min_show
• function fan_min_store
• function fan_div_show
• function fan_div_store
• function cpu0_vid_show
• function alarms_show
• function alarm_show
• function lm78_alias_detect
• function lm78_alias_detect
• function lm78_i2c_detect
• function lm78_i2c_probe
• function lm78_read_value
• function lm78_write_value
• function lm78_init_device
• function lm78_isa_probe
• function lm78_isa_found
• function lm78_isa_device_add
• function lm78_isa_register
• function lm78_isa_unregister
• function lm78_isa_register
• function lm78_isa_unregister
• function sm_lm78_exit
• module init sm_lm78_init

Annotated Snippet

module_init(sm_lm78_init);
module_exit(sm_lm78_exit);

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/slab.h`, `linux/jiffies.h`, `linux/i2c.h`, `linux/hwmon.h`, `linux/hwmon-vid.h`, `linux/hwmon-sysfs.h`.
• Detected declarations: `struct lm78_data`, `enum chips`, `function IN_TO_REG`, `function FAN_TO_REG`, `function FAN_FROM_REG`, `function TEMP_TO_REG`, `function TEMP_FROM_REG`, `function in_show`, `function in_min_show`, `function in_max_show`.
• Atlas domain: Driver Families / drivers/hwmon.
• 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.