drivers/auxdisplay/line-display.c

Source file repositories/reference/linux-study-clean/drivers/auxdisplay/line-display.c

File Facts

System
Linux kernel
Corpus path
drivers/auxdisplay/line-display.c
Extension
.c
Size
15041 bytes
Lines
597
Domain
Driver Families
Bucket
drivers/auxdisplay
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.

Dependency Surface

Detected Declarations

Annotated Snippet

err = device_add(&linedisp->dev);
	if (err)
		goto out_del_attach;

	return 0;

out_del_attach:
	delete_attachment(&linedisp->dev, false);
out_del_timer:
	timer_delete_sync(&linedisp->timer);
out_put_device:
	put_device(&linedisp->dev);
	return err;
}
EXPORT_SYMBOL_NS_GPL(linedisp_register, "LINEDISP");

/**
 * linedisp_unregister - unregister a character line display
 * @linedisp: pointer to character line display structure registered previously
 *	      with linedisp_register()
 */
void linedisp_unregister(struct linedisp *linedisp)
{
	device_del(&linedisp->dev);
	delete_attachment(&linedisp->dev, false);
	timer_delete_sync(&linedisp->timer);
	put_device(&linedisp->dev);
}
EXPORT_SYMBOL_NS_GPL(linedisp_unregister, "LINEDISP");

MODULE_DESCRIPTION("Character line display core support");
MODULE_LICENSE("GPL");

Annotation

Implementation Notes