drivers/hwmon/pcf8591.c
Source file repositories/reference/linux-study-clean/drivers/hwmon/pcf8591.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/hwmon/pcf8591.c- Extension
.c- Size
- 7880 bytes
- Lines
- 322
- 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.hlinux/init.hlinux/slab.hlinux/i2c.hlinux/mutex.hlinux/err.hlinux/hwmon.hlinux/kstrtox.h
Detected Declarations
struct pcf8591_datafunction out0_output_showfunction out0_output_storefunction out0_enable_showfunction out0_enable_storefunction pcf8591_probefunction pcf8591_removefunction pcf8591_init_clientfunction pcf8591_read_channelfunction pcf8591_initfunction pcf8591_exitmodule init pcf8591_init
Annotated Snippet
module_init(pcf8591_init);
module_exit(pcf8591_exit);Annotation
- Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/slab.h`, `linux/i2c.h`, `linux/mutex.h`, `linux/err.h`, `linux/hwmon.h`, `linux/kstrtox.h`.
- Detected declarations: `struct pcf8591_data`, `function out0_output_show`, `function out0_output_store`, `function out0_enable_show`, `function out0_enable_store`, `function pcf8591_probe`, `function pcf8591_remove`, `function pcf8591_init_client`, `function pcf8591_read_channel`, `function pcf8591_init`.
- 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.