drivers/net/ethernet/amd/xgbe/xgbe-i2c.c

File Facts

System

Linux kernel

Corpus path

drivers/net/ethernet/amd/xgbe/xgbe-i2c.c

Extension

.c

Size

9548 bytes

Lines

406

Domain

Driver Families

Bucket

drivers/net

Inferred role

Driver Families: implementation source

Status

source 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.
• 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/module.h
• linux/interrupt.h
• linux/kmod.h
• linux/delay.h
• linux/completion.h
• linux/mutex.h
• xgbe.h
• xgbe-common.h

Detected Declarations

• function Copyright
• function xgbe_i2c_set_enable
• function xgbe_i2c_disable
• function xgbe_i2c_enable
• function xgbe_i2c_clear_all_interrupts
• function xgbe_i2c_disable_interrupts
• function xgbe_i2c_enable_interrupts
• function xgbe_i2c_write
• function xgbe_i2c_read
• function xgbe_i2c_clear_isr_interrupts
• function xgbe_i2c_isr_bh_work
• function xgbe_i2c_isr
• function xgbe_i2c_set_mode
• function xgbe_i2c_get_features
• function xgbe_i2c_set_target
• function xgbe_i2c_combined_isr
• function xgbe_i2c_xfer
• function xgbe_i2c_stop
• function xgbe_i2c_start
• function xgbe_i2c_init
• function xgbe_init_function_ptrs_i2c

Annotated Snippet

if (ret) {
			netdev_err(pdata->netdev, "i2c irq request failed\n");
			return ret;
		}
	}

	pdata->i2c.started = 1;

	return 0;
}

static int xgbe_i2c_init(struct xgbe_prv_data *pdata)
{
	int ret;

	xgbe_i2c_disable_interrupts(pdata);

	ret = xgbe_i2c_disable(pdata);
	if (ret) {
		dev_err(pdata->dev, "failed to disable i2c master\n");
		return ret;
	}

	xgbe_i2c_get_features(pdata);

	xgbe_i2c_set_mode(pdata);

	xgbe_i2c_clear_all_interrupts(pdata);

	return 0;
}

void xgbe_init_function_ptrs_i2c(struct xgbe_i2c_if *i2c_if)
{
	i2c_if->i2c_init		= xgbe_i2c_init;

	i2c_if->i2c_start		= xgbe_i2c_start;
	i2c_if->i2c_stop		= xgbe_i2c_stop;

	i2c_if->i2c_xfer		= xgbe_i2c_xfer;

	i2c_if->i2c_isr			= xgbe_i2c_combined_isr;
}

Annotation

• Immediate include surface: `linux/module.h`, `linux/interrupt.h`, `linux/kmod.h`, `linux/delay.h`, `linux/completion.h`, `linux/mutex.h`, `xgbe.h`, `xgbe-common.h`.
• Detected declarations: `function Copyright`, `function xgbe_i2c_set_enable`, `function xgbe_i2c_disable`, `function xgbe_i2c_enable`, `function xgbe_i2c_clear_all_interrupts`, `function xgbe_i2c_disable_interrupts`, `function xgbe_i2c_enable_interrupts`, `function xgbe_i2c_write`, `function xgbe_i2c_read`, `function xgbe_i2c_clear_isr_interrupts`.
• Atlas domain: Driver Families / drivers/net.
• Implementation status: source 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.