drivers/i2c/i2c-boardinfo.c
Source file repositories/reference/linux-study-clean/drivers/i2c/i2c-boardinfo.c
File Facts
- System
- Linux kernel
- Corpus path
drivers/i2c/i2c-boardinfo.c- Extension
.c- Size
- 2679 bytes
- Lines
- 94
- Domain
- Driver Families
- Bucket
- drivers/i2c
- 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/export.hlinux/i2c.hlinux/kernel.hlinux/property.hlinux/rwsem.hlinux/slab.hi2c-core.h
Detected Declarations
function arch_initcallexport __i2c_board_lockexport __i2c_board_listexport __i2c_first_dynamic_bus_num
Annotated Snippet
if (!devinfo) {
pr_debug("i2c-core: can't register boardinfo!\n");
status = -ENOMEM;
break;
}
devinfo->busnum = busnum;
devinfo->board_info = *info;
if (info->resources) {
devinfo->board_info.resources =
kmemdup(info->resources,
info->num_resources *
sizeof(*info->resources),
GFP_KERNEL);
if (!devinfo->board_info.resources) {
status = -ENOMEM;
kfree(devinfo);
break;
}
}
list_add_tail(&devinfo->list, &__i2c_board_list);
}
up_write(&__i2c_board_lock);
return status;
}
Annotation
- Immediate include surface: `linux/export.h`, `linux/i2c.h`, `linux/kernel.h`, `linux/property.h`, `linux/rwsem.h`, `linux/slab.h`, `i2c-core.h`.
- Detected declarations: `function arch_initcall`, `export __i2c_board_lock`, `export __i2c_board_list`, `export __i2c_first_dynamic_bus_num`.
- Atlas domain: Driver Families / drivers/i2c.
- 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.