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136 lines
3.3 KiB
Diff
136 lines
3.3 KiB
Diff
From 0d2a0f4f4c00c958fb6e7a2673adbe51c2a932f2 Mon Sep 17 00:00:00 2001
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From: b-ak <anur.bhargav@gmail.com>
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Date: Thu, 3 Jan 2019 00:29:14 +0530
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Subject: [PATCH] BCM270X: Adding device tree support for AudioSense-Pi
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add-on soundcard
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Device tree overlay for AudioSense-Pi card.
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To enable support for the hardware add the following
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line to the RPi /boot/config.txt:
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dtoverlay=audiosense-pi
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More documentation @ arch/arm/boot/dts/overlays/README
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Signed-off-by: b-ak <anur.bhargav@gmail.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 8 ++
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.../dts/overlays/audiosense-pi-overlay.dts | 82 +++++++++++++++++++
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3 files changed, 91 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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audioinjector-addons.dtbo \
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audioinjector-ultra.dtbo \
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audioinjector-wm8731-audio.dtbo \
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+ audiosense-pi.dtbo \
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audremap.dtbo \
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balena-fin.dtbo \
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bmp085_i2c-sensor.dtbo \
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -453,6 +453,14 @@ Load: dtoverlay=audioinjector-wm8731-a
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Params: <None>
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+Name: audiosense-pi
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+Info: Configures the audiosense-pi add on soundcard
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+ For more information refer to
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+ https://gitlab.com/kakar0t/audiosense-pi
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+Load: dtoverlay=audiosense-pi
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+Params: <None>
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+
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+
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Name: audremap
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Info: Switches PWM sound output to pins 12 (Right) & 13 (Left)
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Load: dtoverlay=audremap,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
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@@ -0,0 +1,82 @@
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+// Definitions for audiosense add on soundcard
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+/dts-v1/;
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+/plugin/;
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+#include <dt-bindings/pinctrl/bcm2835.h>
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+#include <dt-bindings/gpio/gpio.h>
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+
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+/ {
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+ compatible = "brcm,bcm2837", "brcm,bcm2836", "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
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+
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+ fragment@0 {
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+ target = <&i2s>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target-path = "/";
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+ __overlay__ {
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+ codec_reg_1v8: codec-reg-1v8 {
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+ compatible = "regulator-fixed";
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+ regulator-name = "tlv320aic3204_1v8";
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+ regulator-min-microvolt = <1800000>;
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+ regulator-max-microvolt = <1800000>;
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+ regulator-always-on;
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+ };
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ codec_rst: codec-rst {
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+ brcm,pins = <26>;
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+ brcm,function = <BCM2835_FSEL_GPIO_OUT>;
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+ };
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&i2c1>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ /* audio external oscillator */
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+ codec_osc: codec_osc {
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+ compatible = "fixed-clock";
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+ #clock-cells = <0>;
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+ clock-frequency = <12000000>; /* 12 MHz */
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+ };
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+
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+ codec: tlv320aic32x4@18 {
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+ #sound-dai-cells = <0>;
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+ compatible = "ti,tlv320aic32x4";
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+ reg = <0x18>;
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+
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+ clocks = <&codec_osc>;
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+ clock-names = "mclk";
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+
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+ iov-supply = <&vdd_3v3_reg>;
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+ ldoin-supply = <&vdd_3v3_reg>;
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+
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+ gpio-controller;
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+ #gpio-cells = <2>;
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+ reset-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
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+
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+ status = "okay";
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+ };
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&sound>;
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+ __overlay__ {
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+ compatible = "as,audiosense-pi";
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+ i2s-controller = <&i2s>;
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+ status = "okay";
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+ };
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+ };
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+};
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