drivers/usb/misc/onboard_usb_dev.c

File Facts

System

Linux kernel

Corpus path

drivers/usb/misc/onboard_usb_dev.c

Extension

.c

Size

19378 bytes

Lines

732

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.
• 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/clk.h
• linux/device.h
• linux/export.h
• linux/err.h
• linux/gpio/consumer.h
• linux/init.h
• linux/i2c.h
• linux/kernel.h
• linux/list.h
• linux/module.h
• linux/mutex.h
• linux/of.h
• linux/of_platform.h
• linux/platform_device.h
• linux/regulator/consumer.h
• linux/slab.h
• linux/suspend.h
• linux/sysfs.h
• linux/usb.h
• linux/usb/hcd.h
• linux/usb/onboard_dev.h
• linux/workqueue.h
• onboard_usb_dev.h

Detected Declarations

• struct usbdev_node
• struct onboard_dev
• function onboard_dev_get_regulators
• function onboard_dev_power_on
• function onboard_dev_power_off
• function onboard_dev_suspend
• function list_for_each_entry
• function onboard_dev_resume
• function get_udev_link_name
• function onboard_dev_add_usbdev
• function onboard_dev_remove_usbdev
• function list_for_each_entry
• function always_powered_in_suspend_show
• function always_powered_in_suspend_store
• function onboard_dev_attrs_are_visible
• function onboard_dev_attach_usb_driver
• function onboard_dev_5744_i2c_read_byte
• function onboard_dev_5744_i2c_write_byte
• function onboard_dev_5744_i2c_init
• function onboard_dev_5744_i2c_init
• function onboard_dev_probe
• function onboard_dev_remove
• function onboard_dev_usbdev_match
• function onboard_dev_usbdev_probe
• function onboard_dev_usbdev_disconnect
• function onboard_dev_init
• function onboard_dev_exit
• module init onboard_dev_init

Annotated Snippet

module_init(onboard_dev_init);

static void __exit onboard_dev_exit(void)
{
	usb_deregister_device_driver(&onboard_dev_usbdev_driver);
	platform_driver_unregister(&onboard_dev_driver);

	cancel_work_sync(&attach_usb_driver_work);
}
module_exit(onboard_dev_exit);

MODULE_AUTHOR("Matthias Kaehlcke <mka@chromium.org>");
MODULE_DESCRIPTION("Driver for discrete onboard USB devices");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/clk.h`, `linux/device.h`, `linux/export.h`, `linux/err.h`, `linux/gpio/consumer.h`, `linux/init.h`, `linux/i2c.h`, `linux/kernel.h`.
• Detected declarations: `struct usbdev_node`, `struct onboard_dev`, `function onboard_dev_get_regulators`, `function onboard_dev_power_on`, `function onboard_dev_power_off`, `function onboard_dev_suspend`, `function list_for_each_entry`, `function onboard_dev_resume`, `function get_udev_link_name`, `function onboard_dev_add_usbdev`.
• Atlas domain: Driver Families / drivers/usb.
• 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.