drivers/mtd/chips/cfi_util.c

File Facts

System

Linux kernel

Corpus path

drivers/mtd/chips/cfi_util.c

Extension

.c

Size

11657 bytes

Lines

446

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.
• 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
• asm/io.h
• asm/byteorder.h
• linux/errno.h
• linux/slab.h
• linux/delay.h
• linux/interrupt.h
• linux/mtd/xip.h
• linux/mtd/mtd.h
• linux/mtd/map.h
• linux/mtd/cfi.h

Detected Declarations

• function Copyright
• function cfi_build_cmd_addr
• function geometry
• function cfi_merge_status
• function cfi_send_gen_cmd
• function cfi_qry_present
• function cfi_qry_mode_on
• function cfi_qry_mode_off
• function cfi_read_pri
• function cfi_fixup
• function cfi_varsize_frob
• export cfi_udelay
• export cfi_build_cmd_addr
• export cfi_build_cmd
• export cfi_merge_status
• export cfi_send_gen_cmd
• export cfi_qry_present
• export cfi_qry_mode_on
• export cfi_qry_mode_off
• export cfi_read_pri
• export cfi_fixup
• export cfi_varsize_frob

Annotated Snippet

if (adr >> cfi->chipshift) {
			adr = 0;
			chipnum++;

			if (chipnum >= cfi->numchips)
				break;
		}
	}

	return 0;
}

EXPORT_SYMBOL(cfi_varsize_frob);

MODULE_DESCRIPTION("Common Flash Interface Generic utility functions");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/types.h`, `linux/kernel.h`, `asm/io.h`, `asm/byteorder.h`, `linux/errno.h`, `linux/slab.h`, `linux/delay.h`.
• Detected declarations: `function Copyright`, `function cfi_build_cmd_addr`, `function geometry`, `function cfi_merge_status`, `function cfi_send_gen_cmd`, `function cfi_qry_present`, `function cfi_qry_mode_on`, `function cfi_qry_mode_off`, `function cfi_read_pri`, `function cfi_fixup`.
• Atlas domain: Driver Families / drivers/mtd.
• 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.