diff options
| author | Luca Ceresoli <luca@lucaceresoli.net> | 2019-03-07 22:44:56 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-03-11 17:21:57 +0000 |
| commit | fa225400758dfc7ccddebf4d990f991a435f7921 (patch) | |
| tree | b2efd2c0f2a05b6d959f5d20973ef8d91646e2c8 /Documentation | |
| parent | 7bf7d0554890c53478ec04d3d4bfced0c881f6c8 (diff) | |
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
instantiated.
Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 |
1 files 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 |