drivers/gpio/gpio-sch311x.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-sch311x.c

Extension

.c

Size

11266 bytes

Lines

452

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/ioport.h
• linux/module.h
• linux/kernel.h
• linux/init.h
• linux/platform_device.h
• linux/gpio/driver.h
• linux/bitops.h
• linux/io.h

Detected Declarations

• struct sch311x_pdev_data
• struct sch311x_gpio_block
• struct sch311x_gpio_priv
• struct sch311x_gpio_block_def
• function sch311x_sio_enter
• function sch311x_sio_exit
• function sch311x_sio_inb
• function sch311x_sio_outb
• function sch311x_gpio_request
• function sch311x_gpio_free
• function sch311x_gpio_get
• function __sch311x_gpio_set
• function sch311x_gpio_set
• function sch311x_gpio_direction_in
• function sch311x_gpio_direction_out
• function sch311x_gpio_get_direction
• function sch311x_gpio_set_config
• function sch311x_gpio_probe
• function sch311x_detect
• function sch311x_gpio_pdev_add
• function sch311x_gpio_init
• function sch311x_gpio_exit
• module init sch311x_gpio_init

Annotated Snippet

module_init(sch311x_gpio_init);
module_exit(sch311x_gpio_exit);

MODULE_AUTHOR("Bruno Randolf <br1@einfach.org>");
MODULE_DESCRIPTION("SMSC SCH311x GPIO Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:gpio-sch311x");

Annotation

• Immediate include surface: `linux/ioport.h`, `linux/module.h`, `linux/kernel.h`, `linux/init.h`, `linux/platform_device.h`, `linux/gpio/driver.h`, `linux/bitops.h`, `linux/io.h`.
• Detected declarations: `struct sch311x_pdev_data`, `struct sch311x_gpio_block`, `struct sch311x_gpio_priv`, `struct sch311x_gpio_block_def`, `function sch311x_sio_enter`, `function sch311x_sio_exit`, `function sch311x_sio_inb`, `function sch311x_sio_outb`, `function sch311x_gpio_request`, `function sch311x_gpio_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.