drivers/mtd/maps/physmap-core.c

File Facts

System

Linux kernel

Corpus path

drivers/mtd/maps/physmap-core.c

Extension

.c

Size

16695 bytes

Lines

687

Domain

Driver Families

Bucket

drivers/mtd

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.
• 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/module.h
• linux/types.h
• linux/kernel.h
• linux/init.h
• linux/slab.h
• linux/device.h
• linux/platform_device.h
• linux/property.h
• linux/mtd/mtd.h
• linux/mtd/map.h
• linux/mtd/partitions.h
• linux/mtd/physmap.h
• linux/mtd/concat.h
• linux/mtd/cfi_endian.h
• linux/io.h
• linux/of.h
• linux/pm_runtime.h
• linux/gpio/consumer.h
• physmap-gemini.h
• physmap-ixp4xx.h
• physmap-versatile.h

Detected Declarations

• struct physmap_flash_info
• function physmap_flash_remove
• function physmap_set_vpp
• function physmap_set_addr_gpios
• function physmap_addr_gpios_read
• function physmap_addr_gpios_copy_from
• function physmap_addr_gpios_write
• function physmap_addr_gpios_copy_to
• function physmap_addr_gpios_map_init
• function physmap_addr_gpios_map_init
• function physmap_flash_of_init
• function physmap_flash_of_init
• function physmap_flash_pdata_init
• function physmap_flash_probe
• function physmap_flash_shutdown
• function physmap_init
• function physmap_exit
• module init physmap_init

Annotated Snippet

module_init(physmap_init);
module_exit(physmap_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_AUTHOR("Vitaly Wool <vwool@ru.mvista.com>");
MODULE_AUTHOR("Mike Frysinger <vapier@gentoo.org>");
MODULE_DESCRIPTION("Generic configurable MTD map driver");

/* legacy platform drivers can't hotplug or coldplg */
#ifndef CONFIG_MTD_PHYSMAP_COMPAT
/* work with hotplug and coldplug */
MODULE_ALIAS("platform:physmap-flash");
#endif

Annotation

• Immediate include surface: `linux/module.h`, `linux/types.h`, `linux/kernel.h`, `linux/init.h`, `linux/slab.h`, `linux/device.h`, `linux/platform_device.h`, `linux/property.h`.
• Detected declarations: `struct physmap_flash_info`, `function physmap_flash_remove`, `function physmap_set_vpp`, `function physmap_set_addr_gpios`, `function physmap_addr_gpios_read`, `function physmap_addr_gpios_copy_from`, `function physmap_addr_gpios_write`, `function physmap_addr_gpios_copy_to`, `function physmap_addr_gpios_map_init`, `function physmap_addr_gpios_map_init`.
• Atlas domain: Driver Families / drivers/mtd.
• 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.