drivers/tty/serial/sc16is7xx.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/sc16is7xx.c

Extension

.c

Size

51891 bytes

Lines

1769

Domain

Driver Families

Bucket

drivers/tty

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/bits.h
• linux/cleanup.h
• linux/clk.h
• linux/delay.h
• linux/device.h
• linux/export.h
• linux/gpio/consumer.h
• linux/gpio/driver.h
• linux/idr.h
• linux/kthread.h
• linux/mod_devicetable.h
• linux/module.h
• linux/property.h
• linux/regmap.h
• linux/sched.h
• linux/serial_core.h
• linux/serial.h
• linux/string.h
• linux/tty.h
• linux/tty_flip.h
• linux/uaccess.h
• linux/units.h
• sc16is7xx.h

Detected Declarations

• struct sc16is7xx_one_config
• struct sc16is7xx_one
• struct sc16is7xx_port
• function sc16is7xx_port_read
• function sc16is7xx_port_write
• function sc16is7xx_fifo_read
• function sc16is7xx_fifo_write
• function sc16is7xx_port_update
• function sc16is7xx_power
• function Register
• function sc16is7xx_regs_unlock
• function sc16is7xx_ier_clear
• function sc16is7xx_ier_set
• function sc16is7xx_stop_tx
• function sc16is7xx_stop_rx
• function sc16is7xx_regmap_volatile
• function sc16is7xx_regmap_precious
• function sc16is7xx_regmap_noinc
• function generator
• function sc16is7xx_handle_rx
• function sc16is7xx_handle_tx
• function sc16is7xx_get_hwmctrl
• function sc16is7xx_update_mlines
• function sc16is7xx_port_irq
• function sc16is7xx_irq
• function sc16is7xx_poll_proc
• function sc16is7xx_tx_proc
• function sc16is7xx_reconf_rs485
• function sc16is7xx_reg_proc
• function sc16is7xx_ms_proc
• function sc16is7xx_enable_ms
• function sc16is7xx_start_tx
• function sc16is7xx_throttle
• function sc16is7xx_unthrottle
• function sc16is7xx_tx_empty
• function sc16is7xx_get_mctrl
• function sc16is7xx_set_mctrl
• function sc16is7xx_break_ctl
• function sc16is7xx_set_termios
• function sc16is7xx_config_rs485
• function sc16is7xx_startup
• function sc16is7xx_shutdown
• function sc16is7xx_request_port
• function sc16is7xx_config_port
• function sc16is7xx_verify_port
• function sc16is7xx_pm
• function sc16is7xx_null_void
• function sc16is7xx_gpio_get

Annotated Snippet

module_init(sc16is7xx_init);

static void __exit sc16is7xx_exit(void)
{
	uart_unregister_driver(&sc16is7xx_uart);
}
module_exit(sc16is7xx_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jon Ringle <jringle@gridpoint.com>");
MODULE_DESCRIPTION(KBUILD_MODNAME " tty serial core driver");

Annotation

• Immediate include surface: `linux/bits.h`, `linux/cleanup.h`, `linux/clk.h`, `linux/delay.h`, `linux/device.h`, `linux/export.h`, `linux/gpio/consumer.h`, `linux/gpio/driver.h`.
• Detected declarations: `struct sc16is7xx_one_config`, `struct sc16is7xx_one`, `struct sc16is7xx_port`, `function sc16is7xx_port_read`, `function sc16is7xx_port_write`, `function sc16is7xx_fifo_read`, `function sc16is7xx_fifo_write`, `function sc16is7xx_port_update`, `function sc16is7xx_power`, `function Register`.
• Atlas domain: Driver Families / drivers/tty.
• 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.