[PATCH v4 8/9] dt-bindings: adv748x: add information about serial audio interface (I2S/TDM)

Alex Riesen
2020-03-26T11:03:45Z

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