drivers/gpio/gpio-mpc5200.c

File Facts

System

Linux kernel

Corpus path

drivers/gpio/gpio-mpc5200.c

Extension

.c

Size

9077 bytes

Lines

377

Domain

Driver Families

Bucket

drivers/gpio

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/of.h
• linux/kernel.h
• linux/slab.h
• linux/gpio/driver.h
• linux/io.h
• linux/platform_device.h
• linux/module.h
• asm/mpc52xx.h
• sysdev/fsl_soc.h

Detected Declarations

• struct mpc52xx_gpiochip
• function mpc52xx_wkup_gpio_get
• function __mpc52xx_wkup_gpio_set
• function mpc52xx_wkup_gpio_set
• function mpc52xx_wkup_gpio_dir_in
• function mpc52xx_wkup_gpio_dir_out
• function mpc52xx_wkup_gpiochip_probe
• function mpc52xx_simple_gpio_get
• function __mpc52xx_simple_gpio_set
• function mpc52xx_simple_gpio_set
• function mpc52xx_simple_gpio_dir_in
• function mpc52xx_simple_gpio_dir_out
• function mpc52xx_simple_gpiochip_probe
• function mpc52xx_gpio_init
• function mpc52xx_gpio_exit
• module init mpc52xx_gpio_init

Annotated Snippet

subsys_initcall(mpc52xx_gpio_init);

static void __exit mpc52xx_gpio_exit(void)
{
	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
}
module_exit(mpc52xx_gpio_exit);

MODULE_DESCRIPTION("Freescale MPC52xx gpio driver");
MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/of.h`, `linux/kernel.h`, `linux/slab.h`, `linux/gpio/driver.h`, `linux/io.h`, `linux/platform_device.h`, `linux/module.h`, `asm/mpc52xx.h`.
• Detected declarations: `struct mpc52xx_gpiochip`, `function mpc52xx_wkup_gpio_get`, `function __mpc52xx_wkup_gpio_set`, `function mpc52xx_wkup_gpio_set`, `function mpc52xx_wkup_gpio_dir_in`, `function mpc52xx_wkup_gpio_dir_out`, `function mpc52xx_wkup_gpiochip_probe`, `function mpc52xx_simple_gpio_get`, `function __mpc52xx_simple_gpio_set`, `function mpc52xx_simple_gpio_set`.
• Atlas domain: Driver Families / drivers/gpio.
• 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.