drivers/spi/spi-au1550.c

File Facts

System

Linux kernel

Corpus path

drivers/spi/spi-au1550.c

Extension

.c

Size

25520 bytes

Lines

984

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/interrupt.h
• linux/slab.h
• linux/errno.h
• linux/module.h
• linux/device.h
• linux/platform_device.h
• linux/resource.h
• linux/spi/spi.h
• linux/spi/spi_bitbang.h
• linux/dma-mapping.h
• linux/completion.h
• asm/mach-au1x00/au1000.h
• asm/mach-au1x00/au1xxx_psc.h
• asm/mach-au1x00/au1xxx_dbdma.h
• asm/mach-au1x00/au1550_spi.h

Detected Declarations

• struct au1550_spi
• function au1550_spi_baudcfg
• function au1550_spi_mask_ack_all
• function au1550_spi_reset_fifos
• function au1550_spi_bits_handlers_set
• function au1550_spi_setupxfer
• function up
• function au1550_spi_dma_rxtmp_free
• function au1550_spi_dma_txrxb
• function buffer
• function au1550_spi_dma_irq_callback
• function au1550_spi_pio_txrxb
• function au1550_spi_pio_irq_callback
• function au1550_spi_txrx_bufs
• function au1550_spi_irq
• function au1550_spi_bits_handlers_set
• function au1550_spi_setup_psc_as_spi
• function au1550_spi_probe
• function au1550_spi_remove
• function au1550_spi_init
• function au1550_spi_exit
• module init au1550_spi_init

Annotated Snippet

module_init(au1550_spi_init);

static void __exit au1550_spi_exit(void)
{
	if (usedma && ddma_memid)
		au1xxx_ddma_del_device(ddma_memid);
	platform_driver_unregister(&au1550_spi_drv);
}
module_exit(au1550_spi_exit);

MODULE_DESCRIPTION("Au1550 PSC SPI Driver");
MODULE_AUTHOR("Jan Nikitenko <jan.nikitenko@gmail.com>");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/init.h`, `linux/interrupt.h`, `linux/slab.h`, `linux/errno.h`, `linux/module.h`, `linux/device.h`, `linux/platform_device.h`, `linux/resource.h`.
• Detected declarations: `struct au1550_spi`, `function au1550_spi_baudcfg`, `function au1550_spi_mask_ack_all`, `function au1550_spi_reset_fifos`, `function au1550_spi_bits_handlers_set`, `function au1550_spi_setupxfer`, `function up`, `function au1550_spi_dma_rxtmp_free`, `function au1550_spi_dma_txrxb`, `function buffer`.
• 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.