drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bit.c

File Facts

System

Linux kernel

Corpus path

drivers/gpu/drm/nouveau/nvkm/subdev/i2c/bit.c

Extension

.c

Size

4638 bytes

Lines

217

Domain

Driver Families

Bucket

drivers/gpu

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.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• bus.h

Detected Declarations

• function files
• function nvkm_i2c_drive_sda
• function nvkm_i2c_sense_scl
• function nvkm_i2c_sense_sda
• function nvkm_i2c_delay
• function nvkm_i2c_raise_scl
• function i2c_start
• function i2c_stop
• function i2c_bitw
• function i2c_bitr
• function nvkm_i2c_get_byte
• function nvkm_i2c_put_byte
• function i2c_addr
• function nvkm_i2c_bit_xfer
• function nvkm_i2c_bit_xfer

Annotated Snippet

if (msg->flags & I2C_M_RD) {
			while (!ret && remaining--)
				ret = nvkm_i2c_get_byte(bus, ptr++, !remaining);
		} else {
			while (!ret && remaining--)
				ret = nvkm_i2c_put_byte(bus, *ptr++);
		}

		msg++;
	}

	i2c_stop(bus);
	return (ret < 0) ? ret : num;
}
#else
int
nvkm_i2c_bit_xfer(struct nvkm_i2c_bus *bus, struct i2c_msg *msgs, int num)
{
	return -ENODEV;
}
#endif

Annotation

• Immediate include surface: `bus.h`.
• Detected declarations: `function files`, `function nvkm_i2c_drive_sda`, `function nvkm_i2c_sense_scl`, `function nvkm_i2c_sense_sda`, `function nvkm_i2c_delay`, `function nvkm_i2c_raise_scl`, `function i2c_start`, `function i2c_stop`, `function i2c_bitw`, `function i2c_bitr`.
• Atlas domain: Driver Families / drivers/gpu.
• Implementation status: source implementation candidate.

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.