drivers/pinctrl/spear/pinctrl-plgpio.c

File Facts

System

Linux kernel

Corpus path

drivers/pinctrl/spear/pinctrl-plgpio.c

Extension

.c

Size

19083 bytes

Lines

743

Domain

Driver Families

Bucket

drivers/pinctrl

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/clk.h
• linux/err.h
• linux/gpio/driver.h
• linux/io.h
• linux/init.h
• linux/mfd/syscon.h
• linux/of.h
• linux/of_platform.h
• linux/pinctrl/consumer.h
• linux/platform_device.h
• linux/pm.h
• linux/regmap.h
• linux/spinlock.h

Detected Declarations

• struct plgpio_regs
• struct plgpio
• function is_plgpio_set
• function plgpio_reg_set
• function plgpio_reg_reset
• function plgpio_direction_input
• function plgpio_direction_output
• function plgpio_get_value
• function plgpio_set_value
• function plgpio_request
• function plgpio_free
• function plgpio_irq_disable
• function plgpio_irq_enable
• function plgpio_irq_set_type
• function plgpio_irq_handler
• function for_each_set_bit
• function spear310_p2o
• function spear310_o2p
• function plgpio_probe_dt
• function plgpio_probe
• function plgpio_suspend
• function plgpio_resume
• function plgpio_init
• module init plgpio_init

Annotated Snippet

subsys_initcall(plgpio_init);

Annotation

• Immediate include surface: `linux/clk.h`, `linux/err.h`, `linux/gpio/driver.h`, `linux/io.h`, `linux/init.h`, `linux/mfd/syscon.h`, `linux/of.h`, `linux/of_platform.h`.
• Detected declarations: `struct plgpio_regs`, `struct plgpio`, `function is_plgpio_set`, `function plgpio_reg_set`, `function plgpio_reg_reset`, `function plgpio_direction_input`, `function plgpio_direction_output`, `function plgpio_get_value`, `function plgpio_set_value`, `function plgpio_request`.
• Atlas domain: Driver Families / drivers/pinctrl.
• 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.