drivers/gpio/gpio-twl4030.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-twl4030.c

Extension

.c

Size

15091 bytes

Lines

638

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.
• 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/module.h
• linux/init.h
• linux/interrupt.h
• linux/kthread.h
• linux/irq.h
• linux/gpio/machine.h
• linux/gpio/driver.h
• linux/gpio/consumer.h
• linux/platform_device.h
• linux/of.h
• linux/irqdomain.h
• linux/mfd/twl.h

Detected Declarations

• struct gpio_twl4030_priv
• function gpio_twl4030_write
• function gpio_twl4030_read
• function twl4030_led_set_value
• function twl4030_set_gpio_direction
• function twl4030_get_gpio_direction
• function twl4030_set_gpio_dataout
• function twl4030_get_gpio_datain
• function twl_request
• function twl_free
• function twl_direction_in
• function twl_get
• function twl_set
• function twl_direction_out
• function twl_get_direction
• function twl_to_irq
• function gpio_twl4030_pulls
• function gpio_twl4030_debounce
• function gpio_twl4030_power_off_action
• function gpio_twl4030_probe
• function of_machine_is_compatible
• function gpio_twl4030_init
• function gpio_twl4030_exit
• module init gpio_twl4030_init

Annotated Snippet

subsys_initcall(gpio_twl4030_init);

static void __exit gpio_twl4030_exit(void)
{
	platform_driver_unregister(&gpio_twl4030_driver);
}
module_exit(gpio_twl4030_exit);

MODULE_AUTHOR("Texas Instruments, Inc.");
MODULE_DESCRIPTION("GPIO interface for TWL4030");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/init.h`, `linux/interrupt.h`, `linux/kthread.h`, `linux/irq.h`, `linux/gpio/machine.h`, `linux/gpio/driver.h`, `linux/gpio/consumer.h`.
• Detected declarations: `struct gpio_twl4030_priv`, `function gpio_twl4030_write`, `function gpio_twl4030_read`, `function twl4030_led_set_value`, `function twl4030_set_gpio_direction`, `function twl4030_get_gpio_direction`, `function twl4030_set_gpio_dataout`, `function twl4030_get_gpio_datain`, `function twl_request`, `function twl_free`.
• Atlas domain: Driver Families / drivers/gpio.
• 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.