drivers/usb/misc/usb251xb.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/misc/usb251xb.c

Extension

.c

Size

23696 bytes

Lines

835

Domain

Driver Families

Bucket

drivers/usb

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.
• 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/delay.h
• linux/gpio/consumer.h
• linux/gpio/driver.h
• linux/i2c.h
• linux/module.h
• linux/nls.h
• linux/of.h
• linux/platform_device.h
• linux/regulator/consumer.h
• linux/slab.h

Detected Declarations

• struct usb251xb
• struct usb251xb_data
• function usb251xb_check_dev_children
• function usb251x_check_gpio_chip
• function usb251x_check_gpio_chip
• function usb251xb_reset
• function usb251xb_connect
• function usb251xb_get_ports_field
• function of_property_for_each_u32
• function usb251xb_get_ofdata
• function usb251xb_regulator_disable_action
• function usb251xb_probe
• function usb251xb_i2c_probe
• function usb251xb_suspend
• function usb251xb_resume
• function usb251xb_i2c_suspend
• function usb251xb_i2c_resume
• function usb251xb_plat_probe
• function usb251xb_plat_suspend
• function usb251xb_plat_resume
• function usb251xb_init
• function usb251xb_exit
• module init usb251xb_init

Annotated Snippet

module_init(usb251xb_init);

static void __exit usb251xb_exit(void)
{
	platform_driver_unregister(&usb251xb_plat_driver);
	i2c_del_driver(&usb251xb_i2c_driver);
}
module_exit(usb251xb_exit);

MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
MODULE_DESCRIPTION("USB251x/xBi USB 2.0 Hub Controller Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/delay.h`, `linux/gpio/consumer.h`, `linux/gpio/driver.h`, `linux/i2c.h`, `linux/module.h`, `linux/nls.h`, `linux/of.h`, `linux/platform_device.h`.
• Detected declarations: `struct usb251xb`, `struct usb251xb_data`, `function usb251xb_check_dev_children`, `function usb251x_check_gpio_chip`, `function usb251x_check_gpio_chip`, `function usb251xb_reset`, `function usb251xb_connect`, `function usb251xb_get_ports_field`, `function of_property_for_each_u32`, `function usb251xb_get_ofdata`.
• Atlas domain: Driver Families / drivers/usb.
• Implementation status: integration implementation candidate.

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.