arch/arm64/boot/dts/renesas/ulcb-audio-graph-card2.dtsi

File Facts

System

Linux kernel

Corpus path

arch/arm64/boot/dts/renesas/ulcb-audio-graph-card2.dtsi

Extension

.dtsi

Size

522 bytes

Lines

27

Domain

Architecture Layer

Bucket

arch/arm64

Inferred role

Architecture Layer: configuration, schema, or hardware description

Status

atlas-only

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

• ulcb-audio-graph-card.dtsi

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Device Tree for ULCB + Audio Graph Card2
 *
 * Copyright (C) 2022 Renesas Electronics Corp.
 */

/*
 *	(A) CPU0 <----> ak4613
 *	(B) CPU1  ----> HDMI
 *
 *	(A) aplay   -D plughw:0,0 xxx.wav
 *	(B) aplay   -D plughw:0,1 xxx.wav
 *
 *	(A) arecord -D plughw:0,0 xxx.wav
 */
#include "ulcb-audio-graph-card.dtsi"

&sound_card {
	compatible = "audio-graph-card2";

	/delete-property/ dais;
	links = <&snd_ulcb1	/* (A) CPU0 <-> ak4613 */
		 &snd_ulcb2	/* (B) CPU1  -> HDMI   */
		>;
};

Annotation

• Immediate include surface: `ulcb-audio-graph-card.dtsi`.
• Atlas domain: Architecture Layer / arch/arm64.
• Implementation status: atlas-only.

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.