drivers/mfd/kempld-core.c

File Facts

System

Linux kernel

Corpus path

drivers/mfd/kempld-core.c

Extension

.c

Size

20661 bytes

Lines

816

Domain

Driver Families

Bucket

drivers/mfd

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/err.h
• linux/platform_device.h
• linux/mfd/core.h
• linux/mfd/kempld.h
• linux/mod_devicetable.h
• linux/module.h
• linux/property.h
• linux/dmi.h
• linux/io.h
• linux/delay.h
• linux/sysfs.h

Detected Declarations

• enum kempld_cells
• function kempld_get_hardware_mutex
• function kempld_release_hardware_mutex
• function kempld_get_info_generic
• function kempld_register_cells_generic
• function kempld_create_platform_device
• function kempld_read8
• function kempld_write8
• function kempld_read16
• function kempld_write16
• function kempld_read32
• function kempld_write32
• function kempld_get_mutex
• function kempld_release_mutex
• function kempld_get_info
• function kempld_register_cells
• function pld_version_show
• function pld_specification_show
• function pld_type_show
• function kempld_detect_device
• function kempld_probe
• function kempld_remove
• function kempld_init
• function kempld_exit
• module init kempld_init
• export kempld_read8
• export kempld_write8
• export kempld_read16
• export kempld_write16
• export kempld_read32
• export kempld_write32
• export kempld_get_mutex
• export kempld_release_mutex

Annotated Snippet

module_init(kempld_init);
module_exit(kempld_exit);

MODULE_DESCRIPTION("KEM PLD Core Driver");
MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:kempld-core");

Annotation

• Immediate include surface: `linux/err.h`, `linux/platform_device.h`, `linux/mfd/core.h`, `linux/mfd/kempld.h`, `linux/mod_devicetable.h`, `linux/module.h`, `linux/property.h`, `linux/dmi.h`.
• Detected declarations: `enum kempld_cells`, `function kempld_get_hardware_mutex`, `function kempld_release_hardware_mutex`, `function kempld_get_info_generic`, `function kempld_register_cells_generic`, `function kempld_create_platform_device`, `function kempld_read8`, `function kempld_write8`, `function kempld_read16`, `function kempld_write16`.
• Atlas domain: Driver Families / drivers/mfd.
• 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.