Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / sound / tdm-slot.txt

diff --git a/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt b/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt
new file mode 100644 (file)
index 0000000..6a2c842
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/sound/tdm-slot.txt
@@ -0,0 +1,20 @@
+TDM slot:
+
+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.
+
+For instance:
+       dai-tdm-slot-num = <2>;
+       dai-tdm-slot-width = <8>;
+
+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
+the default snd_soc_of_xlate_tdm_slot_mask() will be used to generating the
+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.