drivers/hwmon/pc87427.c

File Facts

System

Linux kernel

Corpus path

drivers/hwmon/pc87427.c

Extension

.c

Size

38345 bytes

Lines

1330

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/platform_device.h
• linux/hwmon.h
• linux/hwmon-sysfs.h
• linux/err.h
• linux/mutex.h
• linux/sysfs.h
• linux/ioport.h
• linux/acpi.h
• linux/io.h

Detected Declarations

• struct pc87427_data
• struct pc87427_sio_data
• function superio_enter
• function superio_outb
• function superio_inb
• function superio_exit
• function pc87427_read8
• function pc87427_read8_bank
• function pc87427_write8_bank
• function pc87427_readall_fan
• function fan_from_reg
• function fan_to_reg
• function pc87427_readall_pwm
• function pwm_enable_from_reg
• function pwm_enable_to_reg
• function pc87427_readall_temp
• function temp_type_from_reg
• function temp_from_reg
• function temp_from_reg8
• function fan_input_show
• function fan_min_show
• function fan_alarm_show
• function fan_fault_show
• function fan_min_store
• function update_pwm_enable
• function pwm_enable_show
• function pwm_enable_store
• function pwm_show
• function pwm_store
• function temp_input_show
• function temp_min_show
• function temp_max_show
• function temp_crit_show
• function temp_type_show
• function temp_min_alarm_show
• function temp_max_alarm_show
• function temp_crit_alarm_show
• function temp_fault_show
• function name_show
• function pc87427_request_regions
• function pc87427_init_device
• function pc87427_remove_files
• function pc87427_probe
• function pc87427_remove
• function pc87427_device_add
• function pc87427_find
• function pc87427_init
• function pc87427_exit

Annotated Snippet

module_init(pc87427_init);
module_exit(pc87427_exit);

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/slab.h`, `linux/jiffies.h`, `linux/platform_device.h`, `linux/hwmon.h`, `linux/hwmon-sysfs.h`, `linux/err.h`.
• Detected declarations: `struct pc87427_data`, `struct pc87427_sio_data`, `function superio_enter`, `function superio_outb`, `function superio_inb`, `function superio_exit`, `function pc87427_read8`, `function pc87427_read8_bank`, `function pc87427_write8_bank`, `function pc87427_readall_fan`.
• 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.