[alsa-devel] [PATCH v9 10/10] ASoC: fsl: Update fsl-ssi binding doc

Markus Pargmann mpa at pengutronix.de
Thu Jun 20 15:20:29 CEST 2013

Update the fsl-ssi bindings. DMA is no required property anymore and
uses the generic DMA bindings. imx-fiq is a new alternative to DMA

Signed-off-by: Markus Pargmann <mpa at pengutronix.de>
Tested-by: Shawn Guo <shawn.guo at linaro.org>

    Changes in v9:
     - Remove space before tab
    Changes in v4:
     - Add a comment about hardware bugs for imx-pcm-fiq
    Changes in v3:
     - In previous versions, I removed fsl,playback-dma and capture-dma. But they
       are still in use by fsl_dma.c, so I added them again.

 Documentation/devicetree/bindings/sound/fsl,ssi.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl,ssi.txt b/Documentation/devicetree/bindings/sound/fsl,ssi.txt
index 5ff76c9..cae80d2 100644
--- a/Documentation/devicetree/bindings/sound/fsl,ssi.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,ssi.txt
@@ -43,10 +43,20 @@ Required properties:
                     together.  This would still allow different sample sizes,
                     but not different sample rates.
+Note that either dmas, dma-names or fsl,imx-fiq are required.
 Optional properties:
 - codec-handle:     Phandle to a 'codec' node that defines an audio
                     codec connected to this SSI.  This node is typically
                     a child of an I2C or other control node.
+- dmas:		    Generic dma devicetree binding as described in
+		    Documentation/devicetree/bindings/dma/dma.txt.
+- dma-names:	    Two dmas have to be defined, "tx" and "rx", if fsl,imx-fiq
+		    is not defined.
+- fsl,imx-fiq:	    Bool property. Use imx-pcm-fiq instead of imx-pcm-dma.
+		    Only necessary for some boards with incompatible
+		    codec. imx-pcm-fiq will manually filter some data from
+		    the codec. It is a workaround for a hardware bug.
 Child 'codec' node required properties:
 - compatible:       Compatible list, contains the name of the codec

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