drivers/comedi/drivers/comedi_test.c

File Facts

System

Linux kernel

Corpus path

drivers/comedi/drivers/comedi_test.c

Extension

.c

Size

26469 bytes

Lines

920

Domain

Driver Families

Bucket

drivers/comedi

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/comedi/comedidev.h
• asm/div64.h
• linux/timer.h
• linux/ktime.h
• linux/jiffies.h
• linux/device.h
• linux/kdev_t.h

Detected Declarations

• struct waveform_private
• function fake_sawtooth
• function fake_squarewave
• function fake_flatline
• function fake_waveform
• function waveform_ai_timer
• function waveform_ai_cmdtest
• function waveform_ai_cmd
• function waveform_ai_cancel
• function waveform_ai_insn_read
• function waveform_ao_timer
• function waveform_ao_inttrig_start
• function waveform_ao_cmdtest
• function waveform_ao_cmd
• function waveform_ao_cancel
• function waveform_ao_insn_write
• function waveform_ai_insn_config
• function waveform_ao_insn_config
• function waveform_dio_insn_bits
• function waveform_dio_insn_config
• function waveform_common_attach
• function waveform_attach
• function waveform_auto_attach
• function waveform_detach
• function comedi_test_init
• function comedi_test_exit
• module init comedi_test_init

Annotated Snippet

module_init(comedi_test_init);

static void __exit comedi_test_exit(void)
{
	if (ctdev)
		comedi_auto_unconfig(ctdev);

	if (class_is_registered(&ctcls)) {
		device_destroy(&ctcls, MKDEV(0, 0));
		class_unregister(&ctcls);
	}

	comedi_driver_unregister(&waveform_driver);
}
module_exit(comedi_test_exit);

MODULE_AUTHOR("Comedi https://www.comedi.org");
MODULE_DESCRIPTION("Comedi low-level driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/comedi/comedidev.h`, `asm/div64.h`, `linux/timer.h`, `linux/ktime.h`, `linux/jiffies.h`, `linux/device.h`, `linux/kdev_t.h`.
• Detected declarations: `struct waveform_private`, `function fake_sawtooth`, `function fake_squarewave`, `function fake_flatline`, `function fake_waveform`, `function waveform_ai_timer`, `function waveform_ai_cmdtest`, `function waveform_ai_cmd`, `function waveform_ai_cancel`, `function waveform_ai_insn_read`.
• Atlas domain: Driver Families / drivers/comedi.
• 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.