drivers/video/fbdev/offb.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/offb.c

Extension

.c

Size

20710 bytes

Lines

727

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.
• 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/aperture.h
• linux/module.h
• linux/kernel.h
• linux/errno.h
• linux/string.h
• linux/mm.h
• linux/vmalloc.h
• linux/delay.h
• linux/of.h
• linux/of_address.h
• linux/interrupt.h
• linux/fb.h
• linux/init.h
• linux/ioport.h
• linux/pci.h
• linux/platform_device.h
• asm/io.h
• asm/bootx.h
• macmodes.h

Detected Declarations

• struct offb_par
• function offb_setcolreg
• function offb_blank
• function offb_set_par
• function offb_destroy
• function offb_init_palette_hacks
• function of_node_name_prefix
• function of_device_is_compatible
• function offb_init_fb
• function offb_init_nodriver
• function offb_remove
• function offb_probe_bootx_noscreen
• function offb_probe_display
• function offb_init
• function offb_exit
• module init offb_init

Annotated Snippet

module_init(offb_init);

static void __exit offb_exit(void)
{
	platform_driver_unregister(&offb_driver_display);
	platform_driver_unregister(&offb_driver_bootx_noscreen);
}
module_exit(offb_exit);

MODULE_DESCRIPTION("Open Firmware frame buffer device driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/aperture.h`, `linux/module.h`, `linux/kernel.h`, `linux/errno.h`, `linux/string.h`, `linux/mm.h`, `linux/vmalloc.h`, `linux/delay.h`.
• Detected declarations: `struct offb_par`, `function offb_setcolreg`, `function offb_blank`, `function offb_set_par`, `function offb_destroy`, `function offb_init_palette_hacks`, `function of_node_name_prefix`, `function of_device_is_compatible`, `function offb_init_fb`, `function offb_init_nodriver`.
• 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.