[PATCH v5 8/9] dt-bindings: adv748x: add information about serial audio interface (I2S/TDM)

[Alex Riesen <alexander.riesen@cetitec.com>]

As the driver has some support for the audio interface of the device,
the bindings file should mention it.

Signed-off-by: Alexander Riesen <alexander.riesen@cetitec.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

--

v3: remove optionality off MCLK clock cell to ensure the description
    matches the hardware no matter if the line is connected.
    Suggested-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 .../devicetree/bindings/media/i2c/adv748x.txt    | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/media/i2c/adv748x.txt b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
index 4f91686e54a6..50a753189b81 100644
--- a/Documentation/devicetree/bindings/media/i2c/adv748x.txt
+++ b/Documentation/devicetree/bindings/media/i2c/adv748x.txt
@@ -2,7 +2,9 @@
 
 The ADV7481 and ADV7482 are multi format video decoders with an integrated
 HDMI receiver. They can output CSI-2 on two independent outputs TXA and TXB
-from three input sources HDMI, analog and TTL.
+from three input sources HDMI, analog and TTL. There is also support for an
+I2S-compatible interface connected to the audio processor of the HDMI decoder.
+The interface has TDM capability (8 slots, 32 bits, left or right justified).
 
 Required Properties:
 
@@ -16,6 +18,8 @@ Required Properties:
     slave device on the I2C bus. The main address is mandatory, others are
     optional and remain at default values if not specified.
 
+  - #clock-cells: must be <0>
+
 Optional Properties:
 
   - interrupt-names: Should specify the interrupts as "intrq1", "intrq2" and/or
@@ -47,6 +51,7 @@ are numbered as follows.
 	  TTL		sink		9
 	  TXA		source		10
 	  TXB		source		11
+	  I2S		source		12
 
 The digital output port nodes, when present, shall contain at least one
 endpoint. Each of those endpoints shall contain the data-lanes property as
@@ -72,6 +77,7 @@ Example:
 
 		#address-cells = <1>;
 		#size-cells = <0>;
+		#clock-cells = <0>;
 
 		interrupt-parent = <&gpio6>;
 		interrupt-names = "intrq1", "intrq2";
@@ -113,4 +119,12 @@ Example:
 				remote-endpoint = <&csi20_in>;
 			};
 		};
+
+		port@c {
+			reg = <12>;
+
+			adv7482_i2s: endpoint {
+				remote-endpoint = <&i2s_in>;
+			};
+		};
 	};
-- 
2.25.1.25.g9ecbe7eb18