drivers/gpio/gpio-ml-ioh.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-ml-ioh.c

Extension

.c

Size

12949 bytes

Lines

529

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/module.h
• linux/kernel.h
• linux/slab.h
• linux/pci.h
• linux/gpio/driver.h
• linux/interrupt.h
• linux/irq.h

Detected Declarations

• struct ioh_reg_comn
• struct ioh_regs
• struct ioh_gpio_reg_data
• struct ioh_gpio
• function ioh_gpio_set
• function ioh_gpio_get
• function ioh_gpio_direction_output
• function ioh_gpio_direction_input
• function ioh_gpio_save_reg_conf
• function ioh_gpio_restore_reg_conf
• function ioh_gpio_to_irq
• function ioh_gpio_setup
• function ioh_irq_type
• function ioh_irq_unmask
• function ioh_irq_mask
• function ioh_irq_disable
• function ioh_irq_enable
• function ioh_gpio_handler
• function ioh_gpio_alloc_generic_chip
• function ioh_gpio_probe
• function ioh_gpio_suspend
• function ioh_gpio_resume

Annotated Snippet

static struct pci_driver ioh_gpio_driver = {
	.name = "ml_ioh_gpio",
	.id_table = ioh_gpio_pcidev_id,
	.probe = ioh_gpio_probe,
	.driver = {
		.pm = pm_sleep_ptr(&ioh_gpio_pm_ops),
	},
};

module_pci_driver(ioh_gpio_driver);

MODULE_DESCRIPTION("OKI SEMICONDUCTOR ML-IOH series GPIO Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/module.h`, `linux/kernel.h`, `linux/slab.h`, `linux/pci.h`, `linux/gpio/driver.h`, `linux/interrupt.h`, `linux/irq.h`.
• Detected declarations: `struct ioh_reg_comn`, `struct ioh_regs`, `struct ioh_gpio_reg_data`, `struct ioh_gpio`, `function ioh_gpio_set`, `function ioh_gpio_get`, `function ioh_gpio_direction_output`, `function ioh_gpio_direction_input`, `function ioh_gpio_save_reg_conf`, `function ioh_gpio_restore_reg_conf`.
• 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.