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SubjectApplied "ASoC: axi-i2s: make both "rx" and "tx" optional" to the asoc tree
The patch

ASoC: axi-i2s: make both "rx" and "tx" optional

has been applied to the asoc tree at

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From fa225400758dfc7ccddebf4d990f991a435f7921 Mon Sep 17 00:00:00 2001
From: Luca Ceresoli <>
Date: Thu, 7 Mar 2019 22:44:56 +0100
Subject: [PATCH] ASoC: axi-i2s: make both "rx" and "tx" optional

Both the capture and playback channels are optional in the axi_i2s IP
block. Document how to tell the driver which channels are

Signed-off-by: Luca Ceresoli <>
Signed-off-by: Mark Brown <>
Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt
index 4248b662deff..229ad1392cdc 100644
--- a/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt
+++ b/Documentation/devicetree/bindings/sound/adi,axi-i2s.txt
@@ -1,5 +1,8 @@
ADI AXI-I2S controller

+The core can be generated with transmit (playback), only receive
+(capture) or both directions enabled.
Required properties:
- compatible : Must be "adi,axi-i2s-1.00.a"
- reg : Must contain I2S core's registers location and length
@@ -9,8 +12,8 @@ Required properties:
- clock-names : "axi" for the clock to the AXI interface, "ref" for the sample
rate reference clock.
- dmas: Pairs of phandle and specifier for the DMA channels that are used by
- the core. The core expects two dma channels, one for transmit and one for
- receive.
+ the core. The core expects two dma channels if both transmit and receive are
+ enabled, one channel otherwise.
- dma-names : "tx" for the transmit channel, "rx" for the receive channel.

For more details on the 'dma', 'dma-names', 'clock' and 'clock-names' properties
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