drivers/video/backlight/apple_bl.c

File Facts

System

Linux kernel

Corpus path

drivers/video/backlight/apple_bl.c

Extension

.c

Size

5853 bytes

Lines

244

Domain

Driver Families

Bucket

drivers/video

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/kernel.h
• linux/init.h
• linux/backlight.h
• linux/err.h
• linux/io.h
• linux/pci.h
• linux/acpi.h
• linux/atomic.h
• linux/platform_device.h
• acpi/video.h

Detected Declarations

• struct hw_data
• function intel_chipset_set_brightness
• function intel_chipset_send_intensity
• function intel_chipset_get_intensity
• function nvidia_chipset_set_brightness
• function nvidia_chipset_send_intensity
• function nvidia_chipset_get_intensity
• function apple_bl_probe
• function apple_bl_remove
• function apple_bl_init
• function apple_bl_exit
• module init apple_bl_init

Annotated Snippet

module_init(apple_bl_init);
module_exit(apple_bl_exit);

MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
MODULE_DESCRIPTION("Apple Backlight Driver");
MODULE_LICENSE("GPL");
MODULE_DEVICE_TABLE(acpi, apple_bl_ids);
MODULE_ALIAS("mbp_nvidia_bl");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/init.h`, `linux/backlight.h`, `linux/err.h`, `linux/io.h`, `linux/pci.h`, `linux/acpi.h`.
• Detected declarations: `struct hw_data`, `function intel_chipset_set_brightness`, `function intel_chipset_send_intensity`, `function intel_chipset_get_intensity`, `function nvidia_chipset_set_brightness`, `function nvidia_chipset_send_intensity`, `function nvidia_chipset_get_intensity`, `function apple_bl_probe`, `function apple_bl_remove`, `function apple_bl_init`.
• Atlas domain: Driver Families / drivers/video.
• 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.