drivers/ssb/driver_gpio.c

File Facts

System

Linux kernel

Corpus path

drivers/ssb/driver_gpio.c

Extension

.c

Size

12006 bytes

Lines

483

Domain

Driver Families

Bucket

drivers/ssb

Inferred role

Driver Families: implementation source

Status

source 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.
• 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

• ssb_private.h
• linux/gpio/driver.h
• linux/irq.h
• linux/interrupt.h
• linux/irqdomain.h
• linux/export.h
• linux/ssb/ssb.h

Detected Declarations

• function ssb_gpio_to_irq
• function ssb_gpio_chipco_get_value
• function ssb_gpio_chipco_set_value
• function ssb_gpio_chipco_direction_input
• function ssb_gpio_chipco_direction_output
• function ssb_gpio_chipco_request
• function ssb_gpio_chipco_free
• function ssb_gpio_irq_chipco_mask
• function ssb_gpio_irq_chipco_unmask
• function ssb_gpio_irq_chipco_handler
• function ssb_gpio_irq_chipco_domain_init
• function ssb_gpio_irq_chipco_domain_exit
• function ssb_gpio_irq_chipco_domain_init
• function ssb_gpio_irq_chipco_domain_exit
• function ssb_gpio_extif_get_value
• function ssb_gpio_extif_set_value
• function ssb_gpio_extif_direction_input
• function ssb_gpio_extif_direction_output
• function ssb_gpio_irq_extif_mask
• function ssb_gpio_irq_extif_unmask
• function ssb_gpio_irq_extif_handler
• function ssb_gpio_irq_extif_domain_init
• function ssb_gpio_irq_extif_domain_exit
• function ssb_gpio_irq_extif_domain_init
• function ssb_gpio_irq_extif_domain_exit
• function ssb_gpio_extif_init
• function ssb_gpio_init
• function ssb_gpio_unregister

Annotated Snippet

ssb_extif_available(&bus->extif)) {
		gpiochip_remove(&bus->gpio);
		return 0;
	}
	return -1;
}

Annotation

• Immediate include surface: `ssb_private.h`, `linux/gpio/driver.h`, `linux/irq.h`, `linux/interrupt.h`, `linux/irqdomain.h`, `linux/export.h`, `linux/ssb/ssb.h`.
• Detected declarations: `function ssb_gpio_to_irq`, `function ssb_gpio_chipco_get_value`, `function ssb_gpio_chipco_set_value`, `function ssb_gpio_chipco_direction_input`, `function ssb_gpio_chipco_direction_output`, `function ssb_gpio_chipco_request`, `function ssb_gpio_chipco_free`, `function ssb_gpio_irq_chipco_mask`, `function ssb_gpio_irq_chipco_unmask`, `function ssb_gpio_irq_chipco_handler`.
• Atlas domain: Driver Families / drivers/ssb.
• Implementation status: source implementation candidate.
• 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.