drivers/i2c/busses/i2c-mlxbf.c

File Facts

System

Linux kernel

Corpus path

drivers/i2c/busses/i2c-mlxbf.c

Extension

.c

Size

73044 bytes

Lines

2448

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.
• 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.
• 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/acpi.h
• linux/bitfield.h
• linux/delay.h
• linux/err.h
• linux/interrupt.h
• linux/i2c.h
• linux/io.h
• linux/iopoll.h
• linux/kernel.h
• linux/module.h
• linux/mutex.h
• linux/of.h
• linux/platform_device.h
• linux/string.h
• linux/string_choices.h
• linux/units.h

Detected Declarations

• struct mlxbf_i2c_timings
• struct mlxbf_i2c_smbus_operation
• struct mlxbf_i2c_smbus_request
• struct mlxbf_i2c_resource
• struct mlxbf_i2c_chip_info
• struct mlxbf_i2c_priv
• enum mlxbf_i2c_chip_type
• enum mlxbf_i2c_timings_config
• function mlxbf_i2c_smbus_transaction_success
• function mlxbf_i2c_smbus_check_status
• function mlxbf_i2c_smbus_write_data
• function mlxbf_i2c_smbus_read_data
• function mlxbf_i2c_smbus_enable
• function mlxbf_i2c_smbus_start_transaction
• function mlxbf_i2c_smbus_quick_command
• function mlxbf_i2c_smbus_byte_func
• function mlxbf_i2c_smbus_data_byte_func
• function mlxbf_i2c_smbus_data_word_func
• function mlxbf_i2c_smbus_i2c_block_func
• function mlxbf_i2c_smbus_block_func
• function mlxbf_i2c_smbus_process_call_func
• function mlxbf_i2c_smbus_blk_process_call_func
• function mlxbf_i2c_has_chip_type
• function mlxbf_i2c_get_shared_resource
• function mlxbf_i2c_init_resource
• function mlxbf_i2c_get_ticks
• function mlxbf_i2c_set_timer
• function mlxbf_i2c_set_timings
• function mlxbf_i2c_init_timings
• function mlxbf_i2c_get_gpio
• function mlxbf_i2c_release_gpio
• function mlxbf_i2c_get_corepll
• function mlxbf_i2c_release_corepll
• function mlxbf_i2c_init_master
• function mlxbf_i2c_calculate_freq_from_tyu
• function mlxbf_i2c_calculate_freq_from_yu
• function mlxbf_i2c_calculate_corepll_freq
• function mlxbf_i2c_slave_enable
• function mlxbf_i2c_slave_disable
• function mlxbf_i2c_init_coalesce
• function mlxbf_i2c_release_coalesce
• function mlxbf_i2c_init_slave
• function mlxbf_i2c_has_coalesce
• function mlxbf_i2c_irq_send
• function mlxbf_i2c_irq_recv
• function mlxbf_i2c_irq
• function mlxbf_i2c_smbus_xfer
• function mlxbf_i2c_reg_slave

Annotated Snippet

module_init(mlxbf_i2c_init);

static void __exit mlxbf_i2c_exit(void)
{
	platform_driver_unregister(&mlxbf_i2c_driver);

	mutex_destroy(&mlxbf_i2c_bus_lock);

	mutex_destroy(&mlxbf_i2c_gpio_lock);
	mutex_destroy(&mlxbf_i2c_corepll_lock);
	mutex_destroy(&mlxbf_i2c_coalesce_lock);
}
module_exit(mlxbf_i2c_exit);

MODULE_DESCRIPTION("Mellanox BlueField I2C bus driver");
MODULE_AUTHOR("Khalil Blaiech <kblaiech@nvidia.com>");
MODULE_AUTHOR("Asmaa Mnebhi <asmaa@nvidia.com>");
MODULE_LICENSE("GPL v2");

Annotation

• Immediate include surface: `linux/acpi.h`, `linux/bitfield.h`, `linux/delay.h`, `linux/err.h`, `linux/interrupt.h`, `linux/i2c.h`, `linux/io.h`, `linux/iopoll.h`.
• Detected declarations: `struct mlxbf_i2c_timings`, `struct mlxbf_i2c_smbus_operation`, `struct mlxbf_i2c_smbus_request`, `struct mlxbf_i2c_resource`, `struct mlxbf_i2c_chip_info`, `struct mlxbf_i2c_priv`, `enum mlxbf_i2c_chip_type`, `enum mlxbf_i2c_timings_config`, `function mlxbf_i2c_smbus_transaction_success`, `function mlxbf_i2c_smbus_check_status`.
• Atlas domain: Driver Families / drivers/i2c.
• 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.