drivers/video/backlight/hp680_bl.c
Source file repositories/reference/linux-study-clean/drivers/video/backlight/hp680_bl.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/video/backlight/hp680_bl.c- Extension
.c- Size
- 3940 bytes
- Lines
- 169
- 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.
- 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/module.hlinux/kernel.hlinux/init.hlinux/platform_device.hlinux/spinlock.hlinux/backlight.hcpu/dac.hmach/hp6xx.hasm/hd64461.h
Detected Declarations
function hp680bl_send_intensityfunction hp680bl_suspendfunction hp680bl_resumefunction hp680bl_set_intensityfunction hp680bl_get_intensityfunction hp680bl_probefunction hp680bl_removefunction hp680bl_initfunction hp680bl_exitmodule init hp680bl_init
Annotated Snippet
module_init(hp680bl_init);
module_exit(hp680bl_exit);
MODULE_AUTHOR("Andriy Skulysh <askulysh@gmail.com>");
MODULE_DESCRIPTION("HP Jornada 680 Backlight Driver");
MODULE_LICENSE("GPL");Annotation
- Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/init.h`, `linux/platform_device.h`, `linux/spinlock.h`, `linux/backlight.h`, `cpu/dac.h`, `mach/hp6xx.h`.
- Detected declarations: `function hp680bl_send_intensity`, `function hp680bl_suspend`, `function hp680bl_resume`, `function hp680bl_set_intensity`, `function hp680bl_get_intensity`, `function hp680bl_probe`, `function hp680bl_remove`, `function hp680bl_init`, `function hp680bl_exit`, `module init hp680bl_init`.
- Atlas domain: Driver Families / drivers/video.
- 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.