bluetooth: Add slimbus driver for WCN3990

For WCN3990, it supports slimbus slave interface
to receive/send audio data such as FM audio, bluetooth
SCO, bluetooth A2DP data, etc.

Change-Id: I6c64debd0c9b43ea5ebf55a58f1f4b06cdc9bd4e
Signed-off-by: Sungjun Park <sjpark@codeaurora.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/bluetooth/btfm_slim.txt b/Documentation/devicetree/bindings/bluetooth/btfm_slim.txt
new file mode 100644
index 000000000000..901db5fb502d
--- /dev/null
+++ b/Documentation/devicetree/bindings/bluetooth/btfm_slim.txt
@@ -0,0 +1,20 @@
+* BTFM Slimbus Slave Driver
+BTFM Slimbus Slave driver configure and initialize slimbus slave device.
+Bluetooth SCO and FM Audio data is transferred over slimbus interface.
+
+Required properties:
+  - compatible: Should be set to one of the following:
+     btfmslim_slave
+  - qcom,btfm-slim-ifd: BTFM slimbus slave device entry name
+
+Optional properties:
+  - qcom,btfm-slim-ifd-elemental-addr: BTFM slimbus slave device enumeration
+  address
+
+Example:
+  btfmslim_codec: wcn3990 {
+    compatible = "qcom,btfmslim_slave";
+    elemental-addr = [00 01 20 02 17 02];
+    qcom,btfm-slim-ifd = "btfmslim_slave_ifd";
+    qcom,btfm-slim-ifd-elemental-addr = [00 00 20 02 17 02];
+  };