drivers/regulator/fixed.c

File Facts

System

Linux kernel

Corpus path

drivers/regulator/fixed.c

Extension

.c

Size

10578 bytes

Lines

403

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/mutex.h
• linux/module.h
• linux/platform_device.h
• linux/pm_domain.h
• linux/pm_opp.h
• linux/regulator/driver.h
• linux/regulator/fixed.h
• linux/gpio/consumer.h
• linux/slab.h
• linux/of.h
• linux/regulator/of_regulator.h
• linux/regulator/machine.h
• linux/clk.h

Detected Declarations

• struct fixed_voltage_data
• struct fixed_dev_type
• function reg_clock_enable
• function reg_clock_disable
• function reg_domain_enable
• function reg_domain_disable
• function reg_is_enabled
• function reg_fixed_under_voltage_irq_handler
• function reg_fixed_get_irqs
• function of_get_fixed_voltage_config
• function reg_fixed_voltage_probe
• function regulator_fixed_voltage_init
• function regulator_fixed_voltage_exit
• module init regulator_fixed_voltage_init

Annotated Snippet

subsys_initcall(regulator_fixed_voltage_init);

static void __exit regulator_fixed_voltage_exit(void)
{
	platform_driver_unregister(&regulator_fixed_voltage_driver);
}
module_exit(regulator_fixed_voltage_exit);

MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Fixed voltage regulator");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:reg-fixed-voltage");

Annotation

• Immediate include surface: `linux/err.h`, `linux/mutex.h`, `linux/module.h`, `linux/platform_device.h`, `linux/pm_domain.h`, `linux/pm_opp.h`, `linux/regulator/driver.h`, `linux/regulator/fixed.h`.
• Detected declarations: `struct fixed_voltage_data`, `struct fixed_dev_type`, `function reg_clock_enable`, `function reg_clock_disable`, `function reg_domain_enable`, `function reg_domain_disable`, `function reg_is_enabled`, `function reg_fixed_under_voltage_irq_handler`, `function reg_fixed_get_irqs`, `function of_get_fixed_voltage_config`.
• Atlas domain: Driver Families / drivers/regulator.
• Implementation status: integration implementation candidate.
• IRQ or DMA behavior appears here, which is relevant to the selected PCIe/NVMe device path.

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.