drivers/parisc/eisa_eeprom.c

File Facts

System

Linux kernel

Corpus path

drivers/parisc/eisa_eeprom.c

Extension

.c

Size

2065 bytes

Lines

100

Domain

Driver Families

Bucket

drivers/parisc

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Touches user memory; correctness depends on fault-safe copying and privilege boundary handling.
• 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/init.h
• linux/kernel.h
• linux/miscdevice.h
• linux/slab.h
• linux/fs.h
• asm/io.h
• linux/uaccess.h
• asm/eisa_eeprom.h

Detected Declarations

• function Copyright
• function eisa_eeprom_read
• function eisa_eeprom_open
• function eisa_eeprom_release
• function eisa_eeprom_init
• module init eisa_eeprom_init

Annotated Snippet

static const struct file_operations eisa_eeprom_fops = {
	.owner =	THIS_MODULE,
	.llseek =	eisa_eeprom_llseek,
	.read =		eisa_eeprom_read,
	.open =		eisa_eeprom_open,
	.release =	eisa_eeprom_release,
};

static struct miscdevice eisa_eeprom_dev = {
	EISA_EEPROM_MINOR,
	"eisa_eeprom",
	&eisa_eeprom_fops
};

static int __init eisa_eeprom_init(void)
{
	int retval;

	if (!eisa_eeprom_addr)
		return -ENODEV;

	retval = misc_register(&eisa_eeprom_dev);
	if (retval < 0) {
		printk(KERN_ERR "EISA EEPROM: cannot register misc device.\n");
		return retval;
	}

	printk(KERN_INFO "EISA EEPROM at 0x%px\n", eisa_eeprom_addr);
	return 0;
}

MODULE_LICENSE("GPL");

module_init(eisa_eeprom_init);

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/kernel.h`, `linux/miscdevice.h`, `linux/slab.h`, `linux/fs.h`, `asm/io.h`, `linux/uaccess.h`.
• Detected declarations: `function Copyright`, `function eisa_eeprom_read`, `function eisa_eeprom_open`, `function eisa_eeprom_release`, `function eisa_eeprom_init`, `module init eisa_eeprom_init`.
• Atlas domain: Driver Families / drivers/parisc.
• Implementation status: pattern implementation candidate.
• This snippet crosses the user/kernel memory boundary; validate fault handling and access checks before translating the pattern.

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.