linux-kernel - [PATCH 1/4] ASoC: dt-bindings: document new symmetric-clock-role flag

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Date:   Fri,  2 Jun 2023 11:03:18 +0200
From:   Alvin Šipraga <alvin@...s.dk>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc:     Alvin Šipraga <alsi@...g-olufsen.dk>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] ASoC: dt-bindings: document new symmetric-clock-role flag

From: Alvin Šipraga <alsi@...g-olufsen.dk>

The new flag specifies that both ends of the dai-link have the same
clock consumer/provider role. This should be used to describe hardware
where e.g. the CPU and codec both receive their bit- and frame-clocks
from an external source.

Signed-off-by: Alvin Šipraga <alsi@...g-olufsen.dk>
---
 .../devicetree/bindings/sound/simple-card.yaml        | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/simple-card.yaml b/Documentation/devicetree/bindings/sound/simple-card.yaml
index b05e05c81cc4..ce738d1a394d 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.yaml
+++ b/Documentation/devicetree/bindings/sound/simple-card.yaml
@@ -27,6 +27,11 @@ definitions:
     description: dai-link uses bit clock inversion
     $ref: /schemas/types.yaml#/definitions/flag
 
+  symmetric-clock-roles:
+    description: |
+    dai-link uses same clock consumer/provider role for both CPU and Codec
+    $ref: /schemas/types.yaml#/definitions/flag
+
   dai-tdm-slot-num:
     description: see tdm-slot.txt.
     $ref: /schemas/types.yaml#/definitions/uint32
@@ -128,6 +133,8 @@ definitions:
         $ref: "#/definitions/frame-inversion"
       bitclock-inversion:
         $ref: "#/definitions/bitclock-inversion"
+      symmetric-clock-roles:
+        $ref: "#/definitions/symmetric-clock-roles"
       frame-master:
         $ref: /schemas/types.yaml#/definitions/flag
       bitclock-master:
@@ -181,6 +188,8 @@ properties:
     $ref: "#/definitions/frame-inversion"
   simple-audio-card,bitclock-inversion:
     $ref: "#/definitions/bitclock-inversion"
+  simple-audio-card,symmetric-clock-roles:
+    $ref: "#/definitions/symmetric-clock-roles"
   simple-audio-card,format:
     $ref: "#/definitions/format"
   simple-audio-card,mclk-fs:
@@ -230,6 +239,8 @@ patternProperties:
         $ref: "#/definitions/frame-inversion"
       bitclock-inversion:
         $ref: "#/definitions/bitclock-inversion"
+      symmetric-clock-roles:
+        $ref: "#/definitions/symmetric-clock-roles"
       format:
         $ref: "#/definitions/format"
       mclk-fs:
-- 
2.40.0