diff options
Diffstat (limited to 'kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt')
| -rw-r--r-- | kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt b/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt index 6a2c84247..34cf70e2c 100644 --- a/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt +++ b/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt @@ -4,11 +4,15 @@ This specifies audio DAI's TDM slot. TDM slot properties: dai-tdm-slot-num : Number of slots in use. -dai-tdm-slot-width : Width in bits for each slot. +dai-tdm-slot-width : Width in bits for each slot. +dai-tdm-slot-tx-mask : Transmit direction slot mask, optional +dai-tdm-slot-rx-mask : Receive direction slot mask, optional For instance: dai-tdm-slot-num = <2>; dai-tdm-slot-width = <8>; + dai-tdm-slot-tx-mask = <0 1>; + dai-tdm-slot-rx-mask = <1 0>; And for each spcified driver, there could be one .of_xlate_tdm_slot_mask() to specify a explicit mapping of the channels and the slots. If it's absent @@ -18,3 +22,8 @@ tx and rx masks. For snd_soc_of_xlate_tdm_slot_mask(), the tx and rx masks will use a 1 bit for an active slot as default, and the default active bits are at the LSB of the masks. + +The explicit masks are given as array of integers, where the first +number presents bit-0 (LSB), second presents bit-1, etc. Any non zero +number is considered 1 and 0 is 0. snd_soc_of_xlate_tdm_slot_mask() +does not do anything, if either mask is set non zero value. |