ASoC: qcom: document apq8016 sbc machine driver bindings

This patch adds bindings for apq8016 sbc machine driver.
APQ8016 has 4 MI2S which can be configured to different sinks like
internal codec/external codec, this connection and various parameters
are controlled via 2 iomux registers.

Acked-by: Kenneth Westfield <kwestfie@codeaurora.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt
new file mode 100644 (file)
index 0000000..4812936
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+++ b/Documentation/devicetree/bindings/sound/qcom,apq8016-sbc.txt
@@ -0,0 +1,60 @@
+* Qualcomm Technologies APQ8016 SBC ASoC machine driver
+
+This node models the Qualcomm Technologies APQ8016 SBC ASoC machine driver
+
+Required properties:
+
+- compatible           : "qcom,apq8016-sbc-sndcard"
+
+- pinctrl-N            : One property must exist for each entry in
+                         pinctrl-names.  See ../pinctrl/pinctrl-bindings.txt
+                         for details of the property values.
+- pinctrl-names                : Must contain a "default" entry.
+- reg                  : Must contain an address for each entry in reg-names.
+- reg-names            : A list which must include the following entries:
+                               * "mic-iomux"
+                               * "spkr-iomux"
+- qcom,model           : Name of the sound card.
+
+Dai-link subnode properties and subnodes:
+
+Required dai-link subnodes:
+
+- cpu                                  : CPU   sub-node
+- codec                                        : CODEC sub-node
+
+Required CPU/CODEC subnodes properties:
+
+-link-name             : Name of the dai link.
+-sound-dai             : phandle and port of CPU/CODEC
+-capture-dai           : phandle and port of CPU/CODEC
+
+Example:
+
+sound: sound {
+       compatible = "qcom,apq8016-sbc-sndcard";
+       reg = <0x07702000 0x4>, <0x07702004 0x4>;
+       reg-names = "mic-iomux", "spkr-iomux";
+       qcom,model = "DB410c";
+
+       /* I2S - Internal codec */
+       internal-dai-link@0 {
+               cpu { /* PRIMARY */
+                       sound-dai = <&lpass MI2S_PRIMARY>;
+               };
+               codec {
+                       sound-dai = <&wcd_codec 0>;
+               };
+       };
+
+       /* External Primary or External Secondary -ADV7533 HDMI */
+       external-dai-link@0 {
+               link-name = "ADV7533";
+               cpu { /* QUAT */
+                       sound-dai = <&lpass MI2S_QUATERNARY>;
+               };
+               codec {
+                       sound-dai = <&adv_bridge 0>;
+               };
+       };
+};