@@ -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
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> --- Documentation/devicetree/bindings/sound/adi,axi-i2s.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)