drivers/gpio/gpio-thunderx.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-thunderx.c

Extension

.c

Size

16576 bytes

Lines

608

Domain

Driver Families

Bucket

drivers/gpio

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• Uses kernel synchronization; read lock ordering, sleepability, and interrupt context assumptions before translating.
• 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/bitops.h
• linux/gpio/driver.h
• linux/interrupt.h
• linux/io.h
• linux/irq.h
• linux/kernel.h
• linux/module.h
• linux/pci.h
• linux/property.h
• linux/spinlock.h

Detected Declarations

• struct thunderx_gpio
• struct thunderx_line
• struct thunderx_gpio
• function bit_cfg_reg
• function intr_reg
• function thunderx_gpio_is_gpio_nowarn
• function Check
• function thunderx_gpio_request
• function thunderx_gpio_dir_in
• function thunderx_gpio_set
• function thunderx_gpio_dir_out
• function thunderx_gpio_get_direction
• function thunderx_gpio_set_config
• function thunderx_gpio_get
• function thunderx_gpio_set_multiple
• function thunderx_gpio_irq_ack
• function thunderx_gpio_irq_mask
• function thunderx_gpio_irq_mask_ack
• function thunderx_gpio_irq_unmask
• function thunderx_gpio_irq_set_type
• function thunderx_gpio_irq_enable
• function thunderx_gpio_irq_disable
• function thunderx_gpio_child_to_parent_hwirq
• function thunderx_gpio_populate_parent_alloc_info
• function thunderx_gpio_probe
• function thunderx_gpio_remove

Annotated Snippet

static struct pci_driver thunderx_gpio_driver = {
	.name = KBUILD_MODNAME,
	.id_table = thunderx_gpio_id_table,
	.probe = thunderx_gpio_probe,
	.remove = thunderx_gpio_remove,
};

module_pci_driver(thunderx_gpio_driver);

MODULE_DESCRIPTION("Cavium Inc. ThunderX/OCTEON-TX GPIO Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/bitops.h`, `linux/gpio/driver.h`, `linux/interrupt.h`, `linux/io.h`, `linux/irq.h`, `linux/kernel.h`, `linux/module.h`, `linux/pci.h`.
• Detected declarations: `struct thunderx_gpio`, `struct thunderx_line`, `struct thunderx_gpio`, `function bit_cfg_reg`, `function intr_reg`, `function thunderx_gpio_is_gpio_nowarn`, `function Check`, `function thunderx_gpio_request`, `function thunderx_gpio_dir_in`, `function thunderx_gpio_set`.
• Atlas domain: Driver Families / drivers/gpio.
• Implementation status: pattern implementation candidate.
• Synchronization appears in or near this file; preserve lock ordering, sleepability, and interrupt-context constraints.
• 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.