arch/arm64/boot/dts/renesas/ulcb-kf-audio-graph-card2-mix+split.dtsi
Source file repositories/reference/linux-study-clean/arch/arm64/boot/dts/renesas/ulcb-kf-audio-graph-card2-mix+split.dtsi
File Facts
- System
- Linux kernel
- Corpus path
arch/arm64/boot/dts/renesas/ulcb-kf-audio-graph-card2-mix+split.dtsi- Extension
.dtsi- Size
- 5044 bytes
- Lines
- 231
- 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
- No C-style include directives detected by the generator.
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 + Kingfisher + Audio Graph Card2 (MIX + TDM Split)
*
* Copyright (C) 2022 Renesas Electronics Corp.
*/
/*
* Note:
* The HDMI output is ignored due to the limited number of subdevices
*
* (A) CPU0 (2ch) <----> (2ch) (X) ak4613 (MIX-0)
* (B) CPU1 (2ch) --/ (MIX-1)
* (C) CPU3 (2ch) ----> (8ch) (Y) PCM3168A-p (TDM-0 : 0,1ch)
* (D) CPU2 (2ch) --/ (TDM-1 : 2,3ch)
* (E) CPU4 (2ch) --/ (TDM-2 : 4,5ch)
* (F) CPU5 (2ch) --/ (TDM-3 : 6,7ch)
* (G) CPU6 (2ch) <---- (6ch) (Z) PCM3168A-c (TDM-a: 0,1ch)
* (H) CPU7 (2ch) <--/ (TDM-b: 2,3ch)
* (I) CPU8 (2ch) <--/ (TDM-c: 4,5ch)
*
* (A) aplay -D plughw:0,0 xxx.wav (MIX-0)
* (B) aplay -D plughw:0,1 xxx.wav (MIX-1)
* (C) aplay -D plughw:1,0 xxx.wav (TDM-0)
* (D) aplay -D plughw:1,1 xxx.wav (TDM-1)
* (E) aplay -D plughw:1,2 xxx.wav (TDM-2)
* (F) aplay -D plughw:1,3 xxx.wav (TDM-3)
*
* (A) arecord -D plughw:0,0 xxx.wav
* (G) arecord -D plughw:1,4 xxx.wav (TDM-a)
* (H) arecord -D plughw:1,5 xxx.wav (TDM-b)
* (I) arecord -D plughw:1,6 xxx.wav (TDM-c)
*/
/ {
sound_card_kf: expand-sound {
compatible = "audio-graph-card2";
label = "snd-kf-split";
routing = "pcm3168a Playback", "DAI2 Playback",
"pcm3168a Playback", "DAI3 Playback",
"pcm3168a Playback", "DAI4 Playback",
"pcm3168a Playback", "DAI5 Playback",
"DAI6 Capture", "pcm3168a Capture",
"DAI7 Capture", "pcm3168a Capture",
"DAI8 Capture", "pcm3168a Capture";
links = <&fe_c /* (C) CPU2 */
&fe_d /* (D) CPU3 */
&fe_e /* (E) CPU4 */
&fe_f /* (F) CPU5 */
&fe_g /* (G) CPU6 */
&fe_h /* (H) CPU7 */
&fe_i /* (I) CPU8 */
&be_y /* (Y) PCM3168A-p */
&be_z /* (Z) PCM3168A-c */
>;
dpcm: dpcm {
#address-cells = <1>;
#size-cells = <0>;
non-supplier;
ports@0 {
#address-cells = <1>;
#size-cells = <0>;
reg = <0>;
/*
* FE
*
Annotation
- 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.