drivers/regulator/lp3972.c

File Facts

System

Linux kernel

Corpus path

drivers/regulator/lp3972.c

Extension

.c

Size

14698 bytes

Lines

569

Domain

Driver Families

Bucket

drivers/regulator

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/bug.h
• linux/err.h
• linux/i2c.h
• linux/module.h
• linux/kernel.h
• linux/regulator/driver.h
• linux/regulator/lp3972.h
• linux/slab.h

Detected Declarations

• struct lp3972
• function lp3972_i2c_read
• function lp3972_i2c_write
• function lp3972_reg_read
• function lp3972_set_bits
• function lp3972_ldo_is_enabled
• function lp3972_ldo_enable
• function lp3972_ldo_disable
• function lp3972_ldo_get_voltage_sel
• function lp3972_ldo_set_voltage_sel
• function register
• function lp3972_dcdc_is_enabled
• function lp3972_dcdc_enable
• function lp3972_dcdc_disable
• function lp3972_dcdc_get_voltage_sel
• function lp3972_dcdc_set_voltage_sel
• function setup_regulators
• function lp3972_i2c_probe
• function lp3972_module_init
• function lp3972_module_exit
• module init lp3972_module_init

Annotated Snippet

subsys_initcall(lp3972_module_init);

static void __exit lp3972_module_exit(void)
{
	i2c_del_driver(&lp3972_i2c_driver);
}
module_exit(lp3972_module_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Axel Lin <axel.lin@gmail.com>");
MODULE_DESCRIPTION("LP3972 PMIC driver");

Annotation

• Immediate include surface: `linux/bug.h`, `linux/err.h`, `linux/i2c.h`, `linux/module.h`, `linux/kernel.h`, `linux/regulator/driver.h`, `linux/regulator/lp3972.h`, `linux/slab.h`.
• Detected declarations: `struct lp3972`, `function lp3972_i2c_read`, `function lp3972_i2c_write`, `function lp3972_reg_read`, `function lp3972_set_bits`, `function lp3972_ldo_is_enabled`, `function lp3972_ldo_enable`, `function lp3972_ldo_disable`, `function lp3972_ldo_get_voltage_sel`, `function lp3972_ldo_set_voltage_sel`.
• Atlas domain: Driver Families / drivers/regulator.
• 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.