drivers/leds/trigger/ledtrig-pattern.c

File Facts

System

Linux kernel

Corpus path

drivers/leds/trigger/ledtrig-pattern.c

Extension

.c

Size

13403 bytes

Lines

544

Domain

Driver Families

Bucket

drivers/leds

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/kernel.h
• linux/leds.h
• linux/module.h
• linux/mutex.h
• linux/slab.h
• linux/timer.h
• linux/hrtimer.h

Detected Declarations

• struct pattern_trig_data
• enum pattern_type
• function pattern_trig_update_patterns
• function pattern_trig_compute_brightness
• function pattern_trig_timer_start
• function pattern_trig_timer_cancel
• function pattern_trig_timer_restart
• function pattern_trig_timer_common_function
• function pattern_trig_timer_function
• function pattern_trig_hrtimer_function
• function pattern_trig_start_pattern
• function repeat_show
• function repeat_store
• function pattern_trig_show_patterns
• function pattern_trig_store_patterns_string
• function pattern_trig_store_patterns_int
• function pattern_trig_store_patterns
• function pattern_show
• function pattern_store
• function hw_pattern_show
• function hw_pattern_store
• function hr_pattern_show
• function hr_pattern_store
• function pattern_trig_attrs_mode
• function pattern_init
• function pattern_trig_activate
• function pattern_trig_deactivate
• function pattern_trig_init
• function pattern_trig_exit
• module init pattern_trig_init

Annotated Snippet

module_init(pattern_trig_init);
module_exit(pattern_trig_exit);

MODULE_AUTHOR("Raphael Teysseyre <rteysseyre@gmail.com>");
MODULE_AUTHOR("Baolin Wang <baolin.wang@linaro.org>");
MODULE_DESCRIPTION("LED Pattern trigger");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/kernel.h`, `linux/leds.h`, `linux/module.h`, `linux/mutex.h`, `linux/slab.h`, `linux/timer.h`, `linux/hrtimer.h`.
• Detected declarations: `struct pattern_trig_data`, `enum pattern_type`, `function pattern_trig_update_patterns`, `function pattern_trig_compute_brightness`, `function pattern_trig_timer_start`, `function pattern_trig_timer_cancel`, `function pattern_trig_timer_restart`, `function pattern_trig_timer_common_function`, `function pattern_trig_timer_function`, `function pattern_trig_hrtimer_function`.
• Atlas domain: Driver Families / drivers/leds.
• 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.