git.librecmc.org Git - oweals/openwrt.git/blob

   1 From 0d2a0f4f4c00c958fb6e7a2673adbe51c2a932f2 Mon Sep 17 00:00:00 2001
   2 From: b-ak <anur.bhargav@gmail.com>
   3 Date: Thu, 3 Jan 2019 00:29:14 +0530
   4 Subject: [PATCH] BCM270X: Adding device tree support for AudioSense-Pi
   5  add-on soundcard
   6
   7 Device tree overlay for AudioSense-Pi card.
   8
   9 To enable support for the hardware add the following
  10 line to the RPi /boot/config.txt:
  11
  12         dtoverlay=audiosense-pi
  13
  14 More documentation @ arch/arm/boot/dts/overlays/README
  15
  16 Signed-off-by: b-ak <anur.bhargav@gmail.com>
  17 ---
  18  arch/arm/boot/dts/overlays/Makefile           |  1 +
  19  arch/arm/boot/dts/overlays/README             |  8 ++
  20  .../dts/overlays/audiosense-pi-overlay.dts    | 82 +++++++++++++++++++
  21  3 files changed, 91 insertions(+)
  22  create mode 100644 arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
  23
  24 --- a/arch/arm/boot/dts/overlays/Makefile
  25 +++ b/arch/arm/boot/dts/overlays/Makefile
  26 @@ -20,6 +20,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  27         audioinjector-addons.dtbo \
  28         audioinjector-ultra.dtbo \
  29         audioinjector-wm8731-audio.dtbo \
  30 +       audiosense-pi.dtbo \
  31         audremap.dtbo \
  32         balena-fin.dtbo \
  33         bmp085_i2c-sensor.dtbo \
  34 --- a/arch/arm/boot/dts/overlays/README
  35 +++ b/arch/arm/boot/dts/overlays/README
  36 @@ -453,6 +453,14 @@ Load:   dtoverlay=audioinjector-wm8731-a
  37  Params: <None>
  38
  39
  40 +Name:   audiosense-pi
  41 +Info:   Configures the audiosense-pi add on soundcard
  42 +        For more information refer to
  43 +        https://gitlab.com/kakar0t/audiosense-pi
  44 +Load:   dtoverlay=audiosense-pi
  45 +Params: <None>
  46 +
  47 +
  48  Name:   audremap
  49  Info:   Switches PWM sound output to pins 12 (Right) & 13 (Left)
  50  Load:   dtoverlay=audremap,<param>=<val>
  51 --- /dev/null
  52 +++ b/arch/arm/boot/dts/overlays/audiosense-pi-overlay.dts
  53 @@ -0,0 +1,82 @@
  54 +// Definitions for audiosense add on soundcard
  55 +/dts-v1/;
  56 +/plugin/;
  57 +#include <dt-bindings/pinctrl/bcm2835.h>
  58 +#include <dt-bindings/gpio/gpio.h>
  59 +
  60 +/ {
  61 +       compatible = "brcm,bcm2837", "brcm,bcm2836", "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
  62 +
  63 +       fragment@0 {
  64 +               target = <&i2s>;
  65 +               __overlay__ {
  66 +                       status = "okay";
  67 +               };
  68 +       };
  69 +
  70 +       fragment@1 {
  71 +               target-path = "/";
  72 +               __overlay__ {
  73 +                       codec_reg_1v8: codec-reg-1v8 {
  74 +                               compatible = "regulator-fixed";
  75 +                               regulator-name = "tlv320aic3204_1v8";
  76 +                               regulator-min-microvolt = <1800000>;
  77 +                               regulator-max-microvolt = <1800000>;
  78 +                               regulator-always-on;
  79 +                       };
  80 +               };
  81 +       };
  82 +
  83 +       fragment@2 {
  84 +               target = <&gpio>;
  85 +               __overlay__ {
  86 +                       codec_rst: codec-rst {
  87 +                               brcm,pins = <26>;
  88 +                               brcm,function = <BCM2835_FSEL_GPIO_OUT>;
  89 +                       };
  90 +               };
  91 +       };
  92 +
  93 +       fragment@3 {
  94 +               target = <&i2c1>;
  95 +               __overlay__ {
  96 +                       #address-cells = <1>;
  97 +                       #size-cells = <0>;
  98 +                       status = "okay";
  99 +
 100 +                       /* audio external oscillator */
 101 +                       codec_osc: codec_osc {
 102 +                               compatible = "fixed-clock";
 103 +                               #clock-cells = <0>;
 104 +                               clock-frequency = <12000000>;   /* 12 MHz */
 105 +                       };
 106 +
 107 +                       codec: tlv320aic32x4@18 {
 108 +                               #sound-dai-cells = <0>;
 109 +                               compatible = "ti,tlv320aic32x4";
 110 +                               reg = <0x18>;
 111 +
 112 +                               clocks = <&codec_osc>;
 113 +                               clock-names = "mclk";
 114 +
 115 +                               iov-supply = <&vdd_3v3_reg>;
 116 +                               ldoin-supply = <&vdd_3v3_reg>;
 117 +
 118 +                               gpio-controller;
 119 +                               #gpio-cells = <2>;
 120 +                               reset-gpios = <&gpio 26 GPIO_ACTIVE_HIGH>;
 121 +
 122 +                               status = "okay";
 123 +                       };
 124 +               };
 125 +       };
 126 +
 127 +       fragment@4 {
 128 +               target = <&sound>;
 129 +               __overlay__ {
 130 +                       compatible = "as,audiosense-pi";
 131 +                       i2s-controller = <&i2s>;
 132 +                       status = "okay";
 133 +               };
 134 +       };
 135 +};