drivers/tty/serial/mpc52xx_uart.c

File Facts

System

Linux kernel

Corpus path

drivers/tty/serial/mpc52xx_uart.c

Extension

.c

Size

50955 bytes

Lines

1919

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/device.h
• linux/module.h
• linux/tty.h
• linux/tty_flip.h
• linux/serial.h
• linux/sysrq.h
• linux/console.h
• linux/delay.h
• linux/io.h
• linux/of.h
• linux/of_address.h
• linux/of_irq.h
• linux/platform_device.h
• linux/clk.h
• asm/mpc52xx.h
• asm/mpc52xx_psc.h
• linux/serial_core.h

Detected Declarations

• struct psc_ops
• struct psc_fifoc
• function mpc52xx_set_divisor
• function mpc52xx_psc_get_status
• function mpc52xx_psc_get_ipcr
• function mpc52xx_psc_command
• function mpc52xx_psc_set_mode
• function mpc52xx_psc_set_rts
• function mpc52xx_psc_enable_ms
• function mpc52xx_psc_set_sicr
• function mpc52xx_psc_set_imr
• function mpc52xx_psc_get_mr1
• function mpc52xx_psc_fifo_init
• function mpc52xx_psc_raw_rx_rdy
• function mpc52xx_psc_raw_tx_rdy
• function mpc52xx_psc_rx_rdy
• function mpc52xx_psc_tx_rdy
• function mpc52xx_psc_tx_empty
• function mpc52xx_psc_start_tx
• function mpc52xx_psc_stop_tx
• function mpc52xx_psc_stop_rx
• function mpc52xx_psc_rx_clr_irq
• function mpc52xx_psc_read_char
• function mpc52xx_psc_cw_disable_ints
• function mpc52xx_psc_cw_restore_ints
• function mpc5200_psc_set_baudrate
• function mpc5200b_psc_set_baudrate
• function mpc52xx_psc_get_irq
• function mpc52xx_psc_handle_irq
• function mpc512x_psc_fifo_init
• function mpc512x_psc_raw_rx_rdy
• function mpc512x_psc_raw_tx_rdy
• function mpc512x_psc_rx_rdy
• function mpc512x_psc_tx_rdy
• function mpc512x_psc_tx_empty
• function mpc512x_psc_stop_rx
• function mpc512x_psc_start_tx
• function mpc512x_psc_stop_tx
• function mpc512x_psc_rx_clr_irq
• function mpc512x_psc_tx_clr_irq
• function mpc512x_psc_write_char
• function mpc512x_psc_read_char
• function mpc512x_psc_cw_disable_ints
• function mpc512x_psc_cw_restore_ints
• function mpc512x_psc_set_baudrate
• function mpc512x_psc_fifoc_init
• function mpc512x_psc_fifoc_uninit
• function mpc512x_psc_handle_irq

Annotated Snippet

module_init(mpc52xx_uart_init);
module_exit(mpc52xx_uart_exit);

MODULE_AUTHOR("Sylvain Munaut <tnt@246tNt.com>");
MODULE_DESCRIPTION("Freescale MPC52xx PSC UART");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/device.h`, `linux/module.h`, `linux/tty.h`, `linux/tty_flip.h`, `linux/serial.h`, `linux/sysrq.h`, `linux/console.h`, `linux/delay.h`.
• Detected declarations: `struct psc_ops`, `struct psc_fifoc`, `function mpc52xx_set_divisor`, `function mpc52xx_psc_get_status`, `function mpc52xx_psc_get_ipcr`, `function mpc52xx_psc_command`, `function mpc52xx_psc_set_mode`, `function mpc52xx_psc_set_rts`, `function mpc52xx_psc_enable_ms`, `function mpc52xx_psc_set_sicr`.
• 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.