drivers/mfd/palmas.c

File Facts

System

Linux kernel

Corpus path

drivers/mfd/palmas.c

Extension

.c

Size

18478 bytes

Lines

736

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.
• 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/moduleparam.h
• linux/init.h
• linux/slab.h
• linux/i2c.h
• linux/interrupt.h
• linux/irq.h
• linux/regmap.h
• linux/err.h
• linux/mfd/core.h
• linux/mfd/palmas.h
• linux/of.h
• linux/of_platform.h

Detected Declarations

• struct palmas_driver_data
• function palmas_ext_control_req_config
• function palmas_set_pdata_irq_flag
• function palmas_dt_to_pdata
• function palmas_power_off
• function palmas_i2c_probe
• function palmas_i2c_remove
• function palmas_i2c_init
• function palmas_i2c_exit
• module init palmas_i2c_init
• export palmas_ext_control_req_config

Annotated Snippet

subsys_initcall(palmas_i2c_init);

static void __exit palmas_i2c_exit(void)
{
	i2c_del_driver(&palmas_i2c_driver);
}
module_exit(palmas_i2c_exit);

MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
MODULE_DESCRIPTION("Palmas chip family multi-function driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/moduleparam.h`, `linux/init.h`, `linux/slab.h`, `linux/i2c.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/regmap.h`.
• Detected declarations: `struct palmas_driver_data`, `function palmas_ext_control_req_config`, `function palmas_set_pdata_irq_flag`, `function palmas_dt_to_pdata`, `function palmas_power_off`, `function palmas_i2c_probe`, `function palmas_i2c_remove`, `function palmas_i2c_init`, `function palmas_i2c_exit`, `module init palmas_i2c_init`.
• Atlas domain: Driver Families / drivers/mfd.
• 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.