[PATCH 1/2] dt-bindings: sound: fsl-asoc-card: add new compatible for I2S slave

[Arnaud Ferraris <arnaud.ferraris@collabora.com>]

fsl-asoc-card currently doesn't support generic codecs with the SoC
acting as I2S slave.

This commit adds a new `fsl,imx-audio-i2s-slave` for this use-case, as
well as the following mandatory properties:
- `audio-codec-dai-name` for specifying the codec DAI to be used
- `audio-slot-width`

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>
---
 .../bindings/sound/fsl-asoc-card.txt          | 23 ++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
index 133d7e14a4d0..694a138df462 100644
--- a/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-asoc-card.txt
@@ -22,6 +22,8 @@ Note: The card is initially designed for those sound cards who use AC'97, I2S
 The compatible list for this generic sound card currently:
  "fsl,imx-audio-ac97"
 
+ "fsl,imx-audio-i2s-slave"
+
  "fsl,imx-audio-cs42888"
 
  "fsl,imx-audio-cs427x"
@@ -75,7 +77,13 @@ Optional unless SSI is selected as a CPU DAI:
 
   - mux-ext-port	: The external port of the i.MX audio muxer
 
-Example:
+Optional unless compatible is "fsl,imx-audio-i2s-slave":
+
+  - audio-codec-dai-name: The name of the DAI provided by the codec
+
+  - audio-slot-width	: The audio sample format
+
+Examples:
 sound-cs42888 {
 	compatible = "fsl,imx-audio-cs42888";
 	model = "cs42888-audio";
@@ -96,3 +104,16 @@ sound-cs42888 {
 		"AIN2L", "Line In Jack",
 		"AIN2R", "Line In Jack";
 };
+
+sound-bluetooth {
+	compatible = "fsl,imx-audio-i2s-slave";
+	audio-cpu = <&ssi1>;
+	audio-codec = <&codec_bluetooth>;
+	audio-codec-dai-name = "bt-sco-pcm-wb";
+	audio-slot-width = <16>;
+	audio-routing =
+		"RX", "Mic Jack",
+		"Headphone Jack", "TX";
+	mux-int-port = <1>;
+	mux-ext-port = <4>;
+};
-- 
2.27.0