[PATCH v2 1/9] ASoC: dt-bindings: mt2701-afe-pcm: add HDMI audio path clocks

Daniel Golle
2026-04-20T01:13:28Z

Document four additional optional clocks feeding the HDMI audio
output path on MT2701: the HADDS2 PLL (root of the HDMI audio
clock tree), the HDMI audio and S/PDIF interface power gates,
and the audio APLL root gate. Older device trees that do not
wire these up remain valid via minItems. MT7622 does not have
HDMI audio hardware, so its compatible is restricted to the
base set of 34 clocks.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
v2:
* Restrict the four HDMI clocks to mediatek,mt2701-audio only
using an allOf/if/then conditional; MT7622 is capped at 34
clocks (Krzysztof Kozlowski)

.../bindings/sound/mediatek,mt2701-audio.yaml | 23 +++++++++++++++++++
1 file changed, 23 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt2701-audio.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt2701-audio.yaml
index 45382c4d86aa3..871bf197650b5 100644
--- a/Documentation/devicetree/bindings/sound/mediatek,mt2701-audio.yaml
+++ b/Documentation/devicetree/bindings/sound/mediatek,mt2701-audio.yaml
@@ -32,6 +32,7 @@ properties:
maxItems: 1

clocks:
+ minItems: 34
items:
- description: audio infra sys clock
- description: top audio mux 1
@@ -67,8 +68,13 @@ properties:
- description: top audio a1 sys pd
- description: top audio a2 sys pd
- description: audio merge interface pd
+ - description: HADDS2 PLL 294 MHz (HDMI audio path root)
+ - description: HDMI audio interface pd
+ - description: S/PDIF interface pd
+ - description: audio APLL root pd

clock-names:
+ minItems: 34
items:
- const: infra_sys_audio_clk
- const: top_audio_mux1_sel
@@ -104,6 +110,10 @@ properties:
- const: audio_a1sys_pd
- const: audio_a2sys_pd
- const: audio_mrgif_pd
+ - const: hadds2pll_294m
+ - const: audio_hdmi_pd
+ - const: audio_spdf_pd
+ - const: audio_apll_pd

required:
- compatible
@@ -114,3 +124,16 @@ required:
- clock-names

additionalProperties: false
+
+allOf:
+ - if:
+ properties:
+ compatible:
+ contains:
+ const: mediatek,mt7622-audio
+ then:
+ properties:
+ clocks:
+ maxItems: 34
+ clock-names:
+ maxItems: 34
--
2.53.0