drivers/hid/hid-google-hammer.c

File Facts

System

Linux kernel

Corpus path

drivers/hid/hid-google-hammer.c

Extension

.c

Size

15678 bytes

Lines

623

Domain

Driver Families

Bucket

drivers/hid

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/acpi.h
• linux/hid.h
• linux/input/vivaldi-fmap.h
• linux/leds.h
• linux/module.h
• linux/of.h
• linux/platform_data/cros_ec_commands.h
• linux/platform_data/cros_ec_proto.h
• linux/platform_device.h
• linux/unaligned.h
• hid-ids.h
• hid-vivaldi-common.h

Detected Declarations

• struct cbas_ec
• struct hammer_kbd_leds
• function cbas_parse_base_state
• function cbas_ec_query_base
• function cbas_ec_notify
• function cbas_ec_resume
• function hammer_event
• function cbas_ec_set_input
• function __cbas_ec_probe
• function cbas_ec_probe
• function cbas_ec_remove
• function hammer_kbd_brightness_set_blocking
• function hammer_register_leds
• function hammer_input_mapping
• function hammer_folded_event
• function hammer_event
• function hammer_has_folded_event
• function hammer_has_backlight_control
• function hammer_get_folded_state
• function hammer_stop
• function hammer_probe
• function hammer_remove
• function hammer_init
• function hammer_exit
• module init hammer_init

Annotated Snippet

module_init(hammer_init);

static void __exit hammer_exit(void)
{
	hid_unregister_driver(&hammer_driver);
	platform_driver_unregister(&cbas_ec_driver);
}
module_exit(hammer_exit);

MODULE_DESCRIPTION("HID driver for Google Hammer device.");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/hid.h`, `linux/input/vivaldi-fmap.h`, `linux/leds.h`, `linux/module.h`, `linux/of.h`, `linux/platform_data/cros_ec_commands.h`, `linux/platform_data/cros_ec_proto.h`.
• Detected declarations: `struct cbas_ec`, `struct hammer_kbd_leds`, `function cbas_parse_base_state`, `function cbas_ec_query_base`, `function cbas_ec_notify`, `function cbas_ec_resume`, `function hammer_event`, `function cbas_ec_set_input`, `function __cbas_ec_probe`, `function cbas_ec_probe`.
• Atlas domain: Driver Families / drivers/hid.
• 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.