ASoC: Davinci: McASP: add device tree support for McASP

Add device tree probe for McASP driver.

Note:
DMA parameters are not populated from DT and will be done later.

Signed-off-by: Hebbar, Gururaja <gururaja.hebbar@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
new file mode 100644
index 000000000000..e6148eca2942
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/davinci-mcasp-audio.txt
@@ -0,0 +1,44 @@
+Texas Instruments McASP controller
+
+Required properties:
+- compatible :
+        "ti,dm646x-mcasp-audio" : for DM646x platforms
+        "ti,da830-mcasp-audio"  : for both DA830 & DA850 platforms
+
+- reg : Should contain McASP registers offset and length
+- interrupts : Interrupt number for McASP
+- op-mode : I2S/DIT ops mode.
+- tdm-slots : Slots for TDM operation.
+- num-serializer : Serializers used by McASP.
+- serial-dir : A list of serializer pin mode. The list number should be equal
+                to "num-serializer" parameter. Each entry is a number indication
+                serializer pin direction. (0 - INACTIVE, 1 - TX, 2 - RX)
+
+
+Optional properties:
+
+- ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
+- tx-num-evt : FIFO levels.
+- rx-num-evt : FIFO levels.
+- sram-size-playback : size of sram to be allocated during playback
+- sram-size-capture  : size of sram to be allocated during capture
+
+Example:
+
+mcasp0: mcasp0@1d00000 {
+        compatible = "ti,da830-mcasp-audio";
+        #address-cells = <1>;
+        #size-cells = <0>;
+        reg = <0x100000 0x3000>;
+        interrupts = <82 83>;
+        op-mode = <0>;          /* MCASP_IIS_MODE */
+        tdm-slots = <2>;
+        num-serializer = <16>;
+        serial-dir = <
+                        0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */
+                        0 0 0 0
+                        0 0 0 1
+                        2 0 0 0 >;
+        tx-num-evt = <1>;
+        rx-num-evt = <1>;
+};