overlays: Add audremap overlay

The audremap overlay switches the PWM audio outputs to GPIO pins 12 (L) and 13 (R).
raspberrypi · Sep 30, 2016 · 12021ab · 12021ab
1 parent 165059f
commit 12021ab
Show file tree

Hide file tree

Showing 3 changed files with 21 additions and 0 deletions.
diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
@@ -18,6 +18,7 @@ dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += audioinjector-wm8731-audio.dtbo
+dtbo-$(RPI_DT_OVERLAYS) += audremap.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += dht11.dtbo
 dtbo-$(RPI_DT_OVERLAYS) += dionaudio-loco.dtbo

diff --git a/arch/arm/boot/dts/overlays/README b/arch/arm/boot/dts/overlays/README
@@ -253,6 +253,12 @@ Load:   dtoverlay=audioinjector-wm8731-audio
 Params: <None>
 
 
+Name:   audremap
+Info:   Switches PWM sound output to pins 12 & 13
+Load:   dtoverlay=audremap
+Params: <None>
+
+
 Name:   bmp085_i2c-sensor
 Info:   Configures the BMP085/BMP180 digital barometric pressure and temperature
         sensors from Bosch Sensortec

diff --git a/arch/arm/boot/dts/overlays/audremap-overlay.dts b/arch/arm/boot/dts/overlays/audremap-overlay.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+/ {
+        compatible = "brcm,bcm2708";
+
+        fragment@0 {
+                target = <&audio_pins>;
+                __overlay__ {
+                        brcm,pins = < 12 13 >;
+                        brcm,function = < 4 >; /* alt0 alt0 */
+                };
+        };
+};