drivers/gpio/gpio-da9055.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-da9055.c

Extension

.c

Size

4176 bytes

Lines

170

Domain

Driver Families

Bucket

drivers/gpio

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/platform_device.h
• linux/gpio/driver.h
• linux/mfd/da9055/core.h
• linux/mfd/da9055/reg.h
• linux/mfd/da9055/pdata.h

Detected Declarations

• struct da9055_gpio
• function da9055_gpio_get
• function da9055_gpio_set
• function da9055_gpio_direction_input
• function da9055_gpio_direction_output
• function da9055_gpio_to_irq
• function da9055_gpio_probe
• function da9055_gpio_init
• function da9055_gpio_exit
• module init da9055_gpio_init

Annotated Snippet

subsys_initcall(da9055_gpio_init);

static void __exit da9055_gpio_exit(void)
{
	platform_driver_unregister(&da9055_gpio_driver);
}
module_exit(da9055_gpio_exit);

MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("DA9055 GPIO Device Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9055-gpio");

Annotation

• Immediate include surface: `linux/module.h`, `linux/platform_device.h`, `linux/gpio/driver.h`, `linux/mfd/da9055/core.h`, `linux/mfd/da9055/reg.h`, `linux/mfd/da9055/pdata.h`.
• Detected declarations: `struct da9055_gpio`, `function da9055_gpio_get`, `function da9055_gpio_set`, `function da9055_gpio_direction_input`, `function da9055_gpio_direction_output`, `function da9055_gpio_to_irq`, `function da9055_gpio_probe`, `function da9055_gpio_init`, `function da9055_gpio_exit`, `module init da9055_gpio_init`.
• Atlas domain: Driver Families / drivers/gpio.
• 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.