drivers/pinctrl/pinctrl-sx150x.c

File Facts

System

Linux kernel

Corpus path

drivers/pinctrl/pinctrl-sx150x.c

Extension

.c

Size

30282 bytes

Lines

1273

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.
• Touches IRQ or DMA behavior; this matters for the representative real-device path.
• 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/regmap.h
• linux/i2c.h
• linux/init.h
• linux/interrupt.h
• linux/irq.h
• linux/mutex.h
• linux/slab.h
• linux/of.h
• linux/gpio/driver.h
• linux/pinctrl/pinconf.h
• linux/pinctrl/pinctrl.h
• linux/pinctrl/pinmux.h
• linux/pinctrl/pinconf-generic.h
• core.h
• pinconf.h
• pinctrl-utils.h

Detected Declarations

• struct sx150x_123_pri
• struct sx150x_456_pri
• struct sx150x_789_pri
• struct sx150x_device_data
• struct sx150x_pinctrl
• function sx150x_pinctrl_get_groups_count
• function sx150x_pinctrl_get_group_pins
• function sx150x_pin_is_oscio
• function sx150x_gpio_get_direction
• function sx150x_gpio_get
• function __sx150x_gpio_set
• function sx150x_gpio_oscio_set
• function sx150x_gpio_set
• function sx150x_gpio_set_multiple
• function sx150x_gpio_direction_input
• function sx150x_gpio_direction_output
• function sx150x_irq_mask
• function sx150x_irq_unmask
• function sx150x_irq_set_sense
• function sx150x_irq_set_type
• function sx150x_irq_thread_fn
• function sx150x_irq_bus_lock
• function sx150x_irq_bus_sync_unlock
• function sx150x_irq_print_chip
• function sx150x_pinconf_get
• function sx150x_pinconf_set
• function sx150x_reset
• function sx150x_init_misc
• function sx150x_init_hw
• function sx150x_regmap_reg_width
• function sx150x_maybe_swizzle
• function sx150x_regmap_reg_read
• function sx150x_regmap_reg_write
• function sx150x_reg_volatile
• function sx150x_probe
• function sx150x_init
• module init sx150x_init

Annotated Snippet

subsys_initcall(sx150x_init);

MODULE_DESCRIPTION("Semtech SX150x I2C GPIO expander pinctrl driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/regmap.h`, `linux/i2c.h`, `linux/init.h`, `linux/interrupt.h`, `linux/irq.h`, `linux/mutex.h`, `linux/slab.h`, `linux/of.h`.
• Detected declarations: `struct sx150x_123_pri`, `struct sx150x_456_pri`, `struct sx150x_789_pri`, `struct sx150x_device_data`, `struct sx150x_pinctrl`, `function sx150x_pinctrl_get_groups_count`, `function sx150x_pinctrl_get_group_pins`, `function sx150x_pin_is_oscio`, `function sx150x_gpio_get_direction`, `function sx150x_gpio_get`.
• 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.
• 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.