drivers/mfd/lpc_ich.c

File Facts

System

Linux kernel

Corpus path

drivers/mfd/lpc_ich.c

Extension

.c

Size

43732 bytes

Lines

1466

Domain

Driver Families

Bucket

drivers/mfd

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.
• 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/align.h
• linux/kernel.h
• linux/module.h
• linux/errno.h
• linux/acpi.h
• linux/pci.h
• linux/pinctrl/pinctrl.h
• linux/property.h
• linux/mfd/core.h
• linux/mfd/lpc_ich.h
• linux/platform_data/itco_wdt.h
• linux/platform_data/x86/p2sb.h

Detected Declarations

• struct lpc_ich_gpio_info
• struct lpc_ich_priv
• enum lpc_chipsets
• function lpc_ich_restore_config_space
• function lpc_ich_enable_acpi_space
• function lpc_ich_enable_gpio_space
• function lpc_ich_enable_pmc_space
• function lpc_ich_finalize_wdt_cell
• function lpc_ich_finalize_gpio_cell
• function lpc_ich_check_conflict_gpio
• function lpc_ich_init_gpio
• function lpc_ich_init_wdt
• function lpc_ich_init_pinctrl
• function lpc_ich_byt_set_writeable
• function lpc_ich_set_writeable
• function lpc_ich_lpt_set_writeable
• function lpc_ich_bxt_set_writeable
• function lpc_ich_init_spi
• function lpc_ich_probe
• function lpc_ich_remove

Annotated Snippet

static struct pci_driver lpc_ich_driver = {
	.name		= "lpc_ich",
	.id_table	= lpc_ich_ids,
	.probe		= lpc_ich_probe,
	.remove		= lpc_ich_remove,
};

module_pci_driver(lpc_ich_driver);

MODULE_AUTHOR("Aaron Sierra <asierra@xes-inc.com>");
MODULE_DESCRIPTION("LPC interface for Intel ICH");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/align.h`, `linux/kernel.h`, `linux/module.h`, `linux/errno.h`, `linux/acpi.h`, `linux/pci.h`, `linux/pinctrl/pinctrl.h`, `linux/property.h`.
• Detected declarations: `struct lpc_ich_gpio_info`, `struct lpc_ich_priv`, `enum lpc_chipsets`, `function lpc_ich_restore_config_space`, `function lpc_ich_enable_acpi_space`, `function lpc_ich_enable_gpio_space`, `function lpc_ich_enable_pmc_space`, `function lpc_ich_finalize_wdt_cell`, `function lpc_ich_finalize_gpio_cell`, `function lpc_ich_check_conflict_gpio`.
• Atlas domain: Driver Families / drivers/mfd.
• Implementation status: pattern 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.