drivers/gpio/gpio-palmas.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-palmas.c

Extension

.c

Size

5572 bytes

Lines

210

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/gpio/driver.h
• linux/kernel.h
• linux/init.h
• linux/mfd/palmas.h
• linux/of.h
• linux/platform_device.h

Detected Declarations

• struct palmas_gpio
• struct palmas_device_data
• function palmas_gpio_get
• function palmas_gpio_set
• function palmas_gpio_output
• function palmas_gpio_input
• function palmas_gpio_to_irq
• function palmas_gpio_probe
• function palmas_gpio_init
• function palmas_gpio_exit
• module init palmas_gpio_init

Annotated Snippet

subsys_initcall(palmas_gpio_init);

static void __exit palmas_gpio_exit(void)
{
	platform_driver_unregister(&palmas_gpio_driver);
}
module_exit(palmas_gpio_exit);

MODULE_DESCRIPTION("TI PALMAS series GPIO driver");
MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/gpio/driver.h`, `linux/kernel.h`, `linux/init.h`, `linux/mfd/palmas.h`, `linux/of.h`, `linux/platform_device.h`.
• Detected declarations: `struct palmas_gpio`, `struct palmas_device_data`, `function palmas_gpio_get`, `function palmas_gpio_set`, `function palmas_gpio_output`, `function palmas_gpio_input`, `function palmas_gpio_to_irq`, `function palmas_gpio_probe`, `function palmas_gpio_init`, `function palmas_gpio_exit`.
• 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.