drivers/platform/x86/hdaps.c

File Facts

System

Linux kernel

Corpus path

drivers/platform/x86/hdaps.c

Extension

.c

Size

16433 bytes

Lines

628

Domain

Driver Families

Bucket

drivers/platform

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/delay.h
• linux/platform_device.h
• linux/input.h
• linux/kernel.h
• linux/mutex.h
• linux/module.h
• linux/timer.h
• linux/dmi.h
• linux/jiffies.h
• linux/io.h

Detected Declarations

• function __get_latch
• function __check_latch
• function __wait_latch
• function __device_refresh
• function __device_refresh_sync
• function __device_complete
• function hdaps_readb_one
• function __hdaps_read_pair
• function hdaps_read_pair
• function hdaps_device_init
• function hdaps_probe
• function hdaps_resume
• function hdaps_calibrate
• function hdaps_mousedev_poll
• function hdaps_position_show
• function hdaps_variance_show
• function hdaps_temp1_show
• function hdaps_temp2_show
• function hdaps_keyboard_activity_show
• function hdaps_mouse_activity_show
• function hdaps_calibrate_show
• function hdaps_calibrate_store
• function hdaps_invert_show
• function hdaps_invert_store
• function hdaps_dmi_match
• function hdaps_dmi_match_invert
• function hdaps_init
• function hdaps_exit
• module init hdaps_init

Annotated Snippet

module_init(hdaps_init);
module_exit(hdaps_exit);

module_param_named(invert, hdaps_invert, int, 0);
MODULE_PARM_DESC(invert, "invert data along each axis. 1 invert x-axis, "
		 "2 invert y-axis, 3 invert both axes.");

MODULE_AUTHOR("Robert Love");
MODULE_DESCRIPTION("IBM Hard Drive Active Protection System (HDAPS) driver");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/delay.h`, `linux/platform_device.h`, `linux/input.h`, `linux/kernel.h`, `linux/mutex.h`, `linux/module.h`, `linux/timer.h`, `linux/dmi.h`.
• Detected declarations: `function __get_latch`, `function __check_latch`, `function __wait_latch`, `function __device_refresh`, `function __device_refresh_sync`, `function __device_complete`, `function hdaps_readb_one`, `function __hdaps_read_pair`, `function hdaps_read_pair`, `function hdaps_device_init`.
• Atlas domain: Driver Families / drivers/platform.
• 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.