drivers/tty/serial/8250/8250_lpss.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/8250/8250_lpss.c

Extension

.c

Size

10830 bytes

Lines

435

Domain

Driver Families

Bucket

drivers/tty

Inferred role

Driver Families: operation-table or driver-model contract

Status

pattern 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.
• Defines an operation table; this is where Linux turns generic core objects into subsystem-specific behavior.
• 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/module.h
• linux/pci.h
• linux/rational.h
• linux/dmaengine.h
• linux/dma/dw.h
• 8250_dwlib.h

Detected Declarations

• struct lpss8250
• struct lpss8250_board
• struct lpss8250
• function byt_set_termios
• function byt_get_mctrl
• function byt_serial_setup
• function byt_serial_exit
• function ehl_serial_setup
• function ehl_serial_exit
• function qrk_serial_setup_dma
• function qrk_serial_exit_dma
• function qrk_serial_setup_dma
• function qrk_serial_exit
• function lpss8250_dma_filter
• function lpss8250_dma_setup
• function lpss8250_probe
• function lpss8250_remove

Annotated Snippet

static struct pci_driver lpss8250_pci_driver = {
	.name           = "8250_lpss",
	.id_table       = pci_ids,
	.probe          = lpss8250_probe,
	.remove         = lpss8250_remove,
};

module_pci_driver(lpss8250_pci_driver);

MODULE_AUTHOR("Intel Corporation");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel LPSS UART driver");

Annotation

• Immediate include surface: `linux/bitops.h`, `linux/module.h`, `linux/pci.h`, `linux/rational.h`, `linux/dmaengine.h`, `linux/dma/dw.h`, `8250_dwlib.h`.
• Detected declarations: `struct lpss8250`, `struct lpss8250_board`, `struct lpss8250`, `function byt_set_termios`, `function byt_get_mctrl`, `function byt_serial_setup`, `function byt_serial_exit`, `function ehl_serial_setup`, `function ehl_serial_exit`, `function qrk_serial_setup_dma`.
• Atlas domain: Driver Families / drivers/tty.
• Implementation status: pattern implementation candidate.

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.