Commit d95fc813 authored by b-ak's avatar b-ak Committed by Phil Elwell
Browse files

BCM270X: Adding device tree support for AudioSense-Pi add-on soundcard 



Device tree overlay for AudioSense-Pi card.

To enable support for the hardware add the following
line to the RPi /boot/config.txt:

	dtoverlay=audiosense-pi

More documentation @ arch/arm/boot/dts/overlays/README

Signed-off-by: default avatarb-ak <anur.bhargav@gmail.com>
parent 45b10f4c

arch/arm/boot/dts/overlays/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ 
	audioinjector-addons.dtbo \

	audioinjector-ultra.dtbo \

	audioinjector-wm8731-audio.dtbo \

	audiosense-pi.dtbo \

	audremap.dtbo \

	balena-fin.dtbo \

	bmp085_i2c-sensor.dtbo \

arch/arm/boot/dts/overlays/README

+8 −0
Original line number Diff line number Diff line
@@ -443,6 +443,14 @@ Load: dtoverlay=audioinjector-wm8731-audio 
Params: <None>





Name:   audiosense-pi

Info:   Configures the audiosense-pi add on soundcard

        For more information refer to

        https://gitlab.com/kakar0t/audiosense-pi

Load:   dtoverlay=audiosense-pi

Params: <None>





Name:   audremap

Info:   Switches PWM sound output to pins 12 (Right) & 13 (Left)

Load:   dtoverlay=audremap,<param>=<val>

arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts

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+82 −0
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// Definitions for audiosense add on soundcard

/dts-v1/;

/plugin/;

#include <dt-bindings/pinctrl/bcm2835.h>

#include <dt-bindings/gpio/gpio.h>



/ {

	compatible = "brcm,bcm2837", "brcm,bcm2836", "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";



	fragment@0 {

		target = <&i2s>;

		__overlay__ {

			status = "okay";

		};

	};



	fragment@1 {

		target-path = "/";

		__overlay__ {

			codec_reg_1v8: codec-reg-1v8 {

				compatible = "regulator-fixed";

				regulator-name = "tlv320aic3204_1v8";

				regulator-min-microvolt = <1800000>;

				regulator-max-microvolt = <1800000>;

				regulator-always-on;

			};

		};

	};



	fragment@2 {

		target = <&gpio>;

		__overlay__ {

			codec_rst: codec-rst {

				brcm,pins = <26>;

				brcm,function = <BCM2835_FSEL_GPIO_OUT>;

			};

		};

	};



	fragment@3 {

		target = <&i2c1>;

		__overlay__ {

			#address-cells = <1>;

			#size-cells = <0>;

			status = "okay";



			/* audio external oscillator */

			codec_osc: codec_osc {

				compatible = "fixed-clock";

				#clock-cells = <0>;

				clock-frequency = <12000000>;	/* 12 MHz */

			};



			codec: tlv320aic32x4@18 {

				#sound-dai-cells = <0>;

				compatible = "ti,tlv320aic32x4";

				reg = <0x18>;



				clocks = <&codec_osc>;

				clock-names = "mclk";



				iov-supply = <&vdd_3v3_reg>;

				ldoin-supply = <&vdd_3v3_reg>;



				gpio-controller;

				#gpio-cells = <2>;

				reset-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;



				status = "okay";

			};

		};

	};



	fragment@4 {

		target = <&sound>;

		__overlay__ {

			compatible = "as,audiosense-pi";

			i2s-controller = <&i2s>;

			status = "okay";

		};

	};

};