drivers/i2c/busses/i2c-davinci.c

File Facts

System

Linux kernel

Corpus path

drivers/i2c/busses/i2c-davinci.c

Extension

.c

Size

23733 bytes

Lines

918

Domain

Driver Families

Bucket

drivers/i2c

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/clk.h
• linux/cpufreq.h
• linux/delay.h
• linux/err.h
• linux/errno.h
• linux/gpio/consumer.h
• linux/i2c.h
• linux/interrupt.h
• linux/io.h
• linux/kernel.h
• linux/module.h
• linux/platform_device.h
• linux/pm_runtime.h
• linux/property.h
• linux/sched.h
• linux/slab.h

Detected Declarations

• struct davinci_i2c_dev
• function davinci_i2c_write_reg
• function davinci_i2c_read_reg
• function davinci_i2c_reset_ctrl
• function i2c_davinci_calc_clk_dividers
• function i2c_davinci_init
• function davinci_i2c_prepare_recovery
• function davinci_i2c_unprepare_recovery
• function davinci_i2c_set_scl
• function davinci_i2c_get_scl
• function davinci_i2c_get_sda
• function davinci_i2c_scl_prepare_recovery
• function davinci_i2c_scl_unprepare_recovery
• function i2c_davinci_wait_bus_not_busy
• function i2c_davinci_xfer_msg
• function i2c_davinci_xfer
• function i2c_davinci_func
• function terminate_read
• function terminate_write
• function i2c_davinci_isr
• function i2c_davinci_cpufreq_transition
• function i2c_davinci_cpufreq_register
• function i2c_davinci_cpufreq_deregister
• function i2c_davinci_cpufreq_register
• function i2c_davinci_cpufreq_deregister
• function davinci_i2c_probe
• function davinci_i2c_remove
• function davinci_i2c_suspend
• function davinci_i2c_resume
• function davinci_i2c_init_driver
• function davinci_i2c_exit_driver
• module init davinci_i2c_init_driver

Annotated Snippet

subsys_initcall(davinci_i2c_init_driver);

static void __exit davinci_i2c_exit_driver(void)
{
	platform_driver_unregister(&davinci_i2c_driver);
}
module_exit(davinci_i2c_exit_driver);

MODULE_AUTHOR("Texas Instruments India");
MODULE_DESCRIPTION("TI DaVinci I2C bus adapter");
MODULE_LICENSE("GPL");

Annotation

• Immediate include surface: `linux/clk.h`, `linux/cpufreq.h`, `linux/delay.h`, `linux/err.h`, `linux/errno.h`, `linux/gpio/consumer.h`, `linux/i2c.h`, `linux/interrupt.h`.
• Detected declarations: `struct davinci_i2c_dev`, `function davinci_i2c_write_reg`, `function davinci_i2c_read_reg`, `function davinci_i2c_reset_ctrl`, `function i2c_davinci_calc_clk_dividers`, `function i2c_davinci_init`, `function davinci_i2c_prepare_recovery`, `function davinci_i2c_unprepare_recovery`, `function davinci_i2c_set_scl`, `function davinci_i2c_get_scl`.
• Atlas domain: Driver Families / drivers/i2c.
• 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.