Add support for the AudioInjector.net bare i2s sound card

Signed-off-by: Matt Flax <[email protected]>

Author: flatmax

arch/arm/boot/dts/overlays/Makefile

@@ -25,6 +25,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	applepi-dac.dtbo \
 	at86rf233.dtbo \
 	audioinjector-addons.dtbo \
+	audioinjector-bare-i2s.dtbo \
 	audioinjector-isolated-soundcard.dtbo \
 	audioinjector-ultra.dtbo \
 	audioinjector-wm8731-audio.dtbo \

arch/arm/boot/dts/overlays/README

@@ -601,6 +601,12 @@ Params: non-stop-clocks         Keeps the clocks running even when the stream
                                 is paused or stopped (default off)
 
 
+Name:   audioinjector-bare-i2s
+Info:   Configures the audioinjector.net audio bare i2s soundcard
+Load:   dtoverlay=audioinjector-bare-i2s
+Params: <None>
+
+
 Name:   audioinjector-isolated-soundcard
 Info:   Configures the audioinjector.net isolated soundcard
 Load:   dtoverlay=audioinjector-isolated-soundcard

arch/arm/boot/dts/overlays/audioinjector-bare-i2s-overlay.dts

@@ -0,0 +1,50 @@
+// Definitions for audioinjector.net audio soundcard
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2835";
+
+	fragment@0 {
+		target = <&i2s>;
+		__overlay__ {
+			status = "okay";
+		};
+	};
+
+	fragment@1 {
+		target-path = "/";
+		__overlay__ {
+			codec_bare: codec_bare {
+				compatible = "linux,spdif-dit";
+				#sound-dai-cells = <0>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&sound>;
+		__overlay__ {
+			compatible = "simple-audio-card";
+			i2s-controller = <&i2s>;
+			status = "okay";
+
+			simple-audio-card,name = "audioinjector-bare";
+			simple-audio-card,format = "i2s";
+
+			simple-audio-card,bitclock-master = <&dailink0_master>;
+			simple-audio-card,frame-master = <&dailink0_master>;
+
+			dailink0_master: simple-audio-card,cpu {
+				sound-dai = <&i2s>;
+				dai-tdm-slot-num = <2>;
+				dai-tdm-slot-width = <32>;
+			};
+
+			snd_codec: simple-audio-card,codec {
+					sound-dai = <&codec_bare>;
+			};
+		};
+	};
+};