drivers/pinctrl/renesas/pinctrl-rza2.c

File Facts

System

Linux kernel

Corpus path

drivers/pinctrl/renesas/pinctrl-rza2.c

Extension

.c

Size

14857 bytes

Lines

540

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/bitops.h
• linux/gpio/driver.h
• linux/io.h
• linux/module.h
• linux/mutex.h
• linux/of.h
• linux/pinctrl/consumer.h
• linux/pinctrl/pinmux.h
• linux/platform_device.h
• ../core.h
• ../pinmux.h

Detected Declarations

• struct rza2_pinctrl_priv
• function rza2_set_pin_function
• function rza2_pin_to_gpio
• function rza2_chip_get_direction
• function rza2_chip_direction_input
• function rza2_chip_get
• function rza2_chip_set
• function rza2_chip_direction_output
• function rza2_gpio_register
• function rza2_pinctrl_register
• function rza2_dt_node_to_map
• function rza2_dt_free_map
• function rza2_set_mux
• function rza2_pinctrl_probe
• function rza2_pinctrl_init
• module init rza2_pinctrl_init

Annotated Snippet

core_initcall(rza2_pinctrl_init);

MODULE_AUTHOR("Chris Brandt <chris.brandt@renesas.com>");
MODULE_DESCRIPTION("Pin and gpio controller driver for RZ/A2 SoC");

Annotation

• Immediate include surface: `linux/bitops.h`, `linux/gpio/driver.h`, `linux/io.h`, `linux/module.h`, `linux/mutex.h`, `linux/of.h`, `linux/pinctrl/consumer.h`, `linux/pinctrl/pinmux.h`.
• Detected declarations: `struct rza2_pinctrl_priv`, `function rza2_set_pin_function`, `function rza2_pin_to_gpio`, `function rza2_chip_get_direction`, `function rza2_chip_direction_input`, `function rza2_chip_get`, `function rza2_chip_set`, `function rza2_chip_direction_output`, `function rza2_gpio_register`, `function rza2_pinctrl_register`.
• 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.