drivers/hwmon/w83781d.c

File Facts

System

Linux kernel

Corpus path

drivers/hwmon/w83781d.c

Extension

.c

Size

57563 bytes

Lines

2092

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/sysfs.h
• linux/err.h
• linux/mutex.h
• linux/platform_device.h
• linux/ioport.h
• linux/io.h
• lm75.h

Detected Declarations

• struct w83781d_data
• enum chips
• enum vendor
• function FAN_TO_REG
• function FAN_FROM_REG
• function DIV_TO_REG
• function store_fan_min
• function cpu0_vid_show
• function vrm_show
• function vrm_store
• function alarms_show
• function show_alarm
• function show_temp3_alarm
• function beep_mask_show
• function beep_mask_store
• function show_beep
• function store_beep
• function show_temp3_beep
• function show_fan_div
• function store_fan_div
• function show_pwm
• function pwm2_enable_show
• function store_pwm
• function pwm2_enable_store
• function show_sensor
• function store_sensor
• function w83781d_detect_subclients
• function w83781d_create_files
• function w83781d_detect
• function w83781d_remove_files
• function w83781d_probe
• function w83781d_remove
• function w83781d_read_value_i2c
• function w83781d_write_value_i2c
• function w83781d_init_device
• function name_show
• function w83781d_alias_detect
• function w83781d_read_value_isa
• function w83781d_write_value_isa
• function w83781d_read_value
• function w83781d_write_value
• function w83781d_isa_probe
• function w83781d_isa_remove
• function w83781d_isa_found
• function w83781d_isa_device_add
• function w83781d_isa_register
• function w83781d_isa_unregister
• function w83781d_alias_detect

Annotated Snippet

module_init(sensors_w83781d_init);
module_exit(sensors_w83781d_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 w83781d_data`, `enum chips`, `enum vendor`, `function FAN_TO_REG`, `function FAN_FROM_REG`, `function DIV_TO_REG`, `function store_fan_min`, `function cpu0_vid_show`, `function vrm_show`, `function vrm_store`.
• 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.