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-rw-r--r--Documentation/devicetree/bindings/sound/fsl-sai.txt30
1 files changed, 22 insertions, 8 deletions
diff --git a/Documentation/devicetree/bindings/sound/fsl-sai.txt b/Documentation/devicetree/bindings/sound/fsl-sai.txt
index 0f4e23828190..4956b14d4b06 100644
--- a/Documentation/devicetree/bindings/sound/fsl-sai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl-sai.txt
@@ -18,12 +18,26 @@ Required properties:
- pinctrl-names: Must contain a "default" entry.
- pinctrl-NNN: One property must exist for each entry in pinctrl-names.
See ../pinctrl/pinctrl-bindings.txt for details of the property values.
-- big-endian-regs: If this property is absent, the little endian mode will
- be in use as default, or the big endian mode will be in use for all the
- device registers.
-- big-endian-data: If this property is absent, the little endian mode will
- be in use as default, or the big endian mode will be in use for all the
- fifo data.
+- big-endian: Boolean property, required if all the FTM_PWM registers
+ are big-endian rather than little-endian.
+- lsb-first: Configures whether the LSB or the MSB is transmitted first for
+ the fifo data. If this property is absent, the MSB is transmitted first as
+ default, or the LSB is transmitted first.
+- fsl,sai-synchronous-rx: This is a boolean property. If present, indicating
+ that SAI will work in the synchronous mode (sync Tx with Rx) which means
+ both the transimitter and receiver will send and receive data by following
+ receiver's bit clocks and frame sync clocks.
+- fsl,sai-asynchronous: This is a boolean property. If present, indicating
+ that SAI will work in the asynchronous mode, which means both transimitter
+ and receiver will send and receive data by following their own bit clocks
+ and frame sync clocks separately.
+
+Note:
+- If both fsl,sai-asynchronous and fsl,sai-synchronous-rx are absent, the
+ default synchronous mode (sync Rx with Tx) will be used, which means both
+ transimitter and receiver will send and receive data by following clocks
+ of transimitter.
+- fsl,sai-asynchronous and fsl,sai-synchronous-rx are exclusive.
Example:
sai2: sai@40031000 {
@@ -38,6 +52,6 @@ sai2: sai@40031000 {
dma-names = "tx", "rx";
dmas = <&edma0 0 VF610_EDMA_MUXID0_SAI2_TX>,
<&edma0 0 VF610_EDMA_MUXID0_SAI2_RX>;
- big-endian-regs;
- big-endian-data;
+ big-endian;
+ lsb-first;
};