drivers/video/fbdev/via/via_aux_ch7301.c

File Facts

System

Linux kernel

Corpus path

drivers/video/fbdev/via/via_aux_ch7301.c

Extension

.c

Size

668 bytes

Lines

36

Domain

Driver Families

Bucket

drivers/video

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

• linux/slab.h
• via_aux.h

Detected Declarations

• function probe
• function via_aux_ch7301_probe

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright 2011 Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
 */
/*
 * driver for Chrontel CH7301 DVI Transmitter
 */

#include <linux/slab.h>
#include "via_aux.h"


static const char *name = "CH7301 DVI Transmitter";


static void probe(struct via_aux_bus *bus, u8 addr)
{
	struct via_aux_drv drv = {
		.bus	=	bus,
		.addr	=	addr,
		.name	=	name};
	u8 tmp;

	if (!via_aux_read(&drv, 0x4B, &tmp, 1) || tmp != 0x17)
		return;

	printk(KERN_INFO "viafb: Found %s at address 0x%x\n", name, addr);
	via_aux_add(&drv);
}

void via_aux_ch7301_probe(struct via_aux_bus *bus)
{
	probe(bus, 0x75);
	probe(bus, 0x76);
}

Annotation

• Immediate include surface: `linux/slab.h`, `via_aux.h`.
• Detected declarations: `function probe`, `function via_aux_ch7301_probe`.
• Atlas domain: Driver Families / drivers/video.
• 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.