drivers/spi/spi-pl022.c

File Facts

System

Linux kernel

Corpus path

drivers/spi/spi-pl022.c

Extension

.c

Size

60691 bytes

Lines

2191

Domain

Driver Families

Bucket

drivers/spi

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.
• 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/init.h
• linux/module.h
• linux/device.h
• linux/ioport.h
• linux/errno.h
• linux/interrupt.h
• linux/spi/spi.h
• linux/delay.h
• linux/clk.h
• linux/err.h
• linux/amba/bus.h
• linux/amba/pl022.h
• linux/io.h
• linux/slab.h
• linux/dmaengine.h
• linux/dma-mapping.h
• linux/scatterlist.h
• linux/pm_runtime.h
• linux/of.h
• linux/pinctrl/consumer.h
• linux/minmax.h

Detected Declarations

• struct vendor_data
• struct pl022
• struct chip_data
• enum ssp_reading
• enum ssp_writing
• function internal_cs_control
• function pl022_cs_control
• function flush
• function restore_state
• function load_ssp_default_config
• function readwriter
• function unmap_free_dma_scatter
• function dma_callback
• function for_each_sg
• function for_each_sg
• function setup_dma_scatter
• function for_each_sg
• function configure_dma
• function pl022_dma_probe
• function pl022_dma_autoprobe
• function terminate_dma
• function pl022_dma_remove
• function configure_dma
• function pl022_dma_autoprobe
• function pl022_dma_probe
• function terminate_dma
• function set_up_next_transfer
• function do_interrupt_dma_transfer
• function print_current_status
• function do_polling_transfer
• function pl022_transfer_one
• function pl022_handle_err
• function pl022_unprepare_transfer_hardware
• function verify_controller_parameters
• function spi_rate
• function calculate_effective_freq
• function rate
• function pl022_setup
• function pl022_cleanup
• function pl022_platform_data_dt_get
• function pl022_probe
• function pl022_remove
• function pl022_suspend
• function pl022_resume
• function pl022_runtime_suspend
• function pl022_runtime_resume
• function pl022_init
• function pl022_exit

Annotated Snippet

subsys_initcall(pl022_init);

static void __exit pl022_exit(void)
{
	amba_driver_unregister(&pl022_driver);
}
module_exit(pl022_exit);

MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
MODULE_DESCRIPTION("PL022 SSP Controller Driver");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/init.h`, `linux/module.h`, `linux/device.h`, `linux/ioport.h`, `linux/errno.h`, `linux/interrupt.h`, `linux/spi/spi.h`, `linux/delay.h`.
• Detected declarations: `struct vendor_data`, `struct pl022`, `struct chip_data`, `enum ssp_reading`, `enum ssp_writing`, `function internal_cs_control`, `function pl022_cs_control`, `function flush`, `function restore_state`, `function load_ssp_default_config`.
• Atlas domain: Driver Families / drivers/spi.
• Implementation status: integration implementation candidate.
• 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.