target/linux/brcm2708/patches-4.4/0240-Add-support-for-the-Digital-Dreamtime-Akkordion-musi.patch

   1 From ddef7a853652982c2796db7f43d067d8487bc7e9 Mon Sep 17 00:00:00 2001
   2 From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
   3 Date: Thu, 14 Apr 2016 01:00:58 +0100
   4 Subject: [PATCH 240/304] Add support for the Digital Dreamtime Akkordion music
   5  player.
   6
   7 Support the Digital Dreamtime Akkordion using the OEM IQAudIO DAC+ or
   8 DACZero modules. Set ALSA card name, ("Akkordion"), from dt config.
   9
  10 Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
  11 ---
  12  arch/arm/boot/dts/overlays/Makefile                |  1 +
  13  arch/arm/boot/dts/overlays/README                  | 20 ++++++++++
  14  .../dts/overlays/akkordion-iqdacplus-overlay.dts   | 46 ++++++++++++++++++++++
  15  3 files changed, 67 insertions(+)
  16  create mode 100644 arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
  17
  18 --- a/arch/arm/boot/dts/overlays/Makefile
  19 +++ b/arch/arm/boot/dts/overlays/Makefile
  20 @@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
  21  endif
  22
  23  dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
  24 +dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
  25  dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
  27  dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
  28 --- a/arch/arm/boot/dts/overlays/README
  29 +++ b/arch/arm/boot/dts/overlays/README
  30 @@ -186,6 +186,26 @@ Params: cs                      SPI bus
  31          www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
  32
  33
  34 +Name:   akkordion-iqdacplus
  35 +Info:   Configures the Digital Dreamtime Akkordion Music Player (based on the
  36 +        OEM IQAudIO DAC+ or DAC Zero module).
  37 +Load:   dtoverlay=akkordion-iqdacplus,<param>=<val>
  38 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  39 +                                Digital volume control. Enable with
  40 +                                dtoverlay=akkordion-iqdacplus,24db_digital_gain
  41 +                                (The default behaviour is that the Digital
  42 +                                volume control is limited to a maximum of
  43 +                                0dB. ie. it can attenuate but not provide
  44 +                                gain. For most users, this will be desired
  45 +                                as it will prevent clipping. By appending
  46 +                                the 24db_digital_gain parameter, the Digital
  47 +                                volume control will allow up to 24dB of
  48 +                                gain. If this parameter is enabled, it is the
  49 +                                responsibility of the user to ensure that
  50 +                                the Digital volume control is set to a value
  51 +                                that does not result in clipping/distortion!)
  52 +
  53 +
  54  Name:   at86rf233
  55  Info:   Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
  56          connected to spi0.0
  57 --- /dev/null
  58 +++ b/arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
  59 @@ -0,0 +1,46 @@
  60 +// Definitions for Digital Dreamtime Akkordion using IQaudIO DAC+ or DACZero
  61 +/dts-v1/;
  62 +/plugin/;
  63 +
  64 +/ {
  65 +       compatible = "brcm,bcm2708";
  66 +
  67 +       fragment@0 {
  68 +               target = <&sound>;
  69 +               frag0: __overlay__ {
  70 +                       compatible = "iqaudio,iqaudio-dac";
  71 +                       card_name = "Akkordion";
  72 +                       dai_name = "IQaudIO DAC";
  73 +                       dai_stream_name = "IQaudIO DAC HiFi";
  74 +                       i2s-controller = <&i2s>;
  75 +                       status = "okay";
  76 +               };
  77 +       };
  78 +
  79 +       fragment@1 {
  80 +               target = <&i2s>;
  81 +               __overlay__ {
  82 +                       status = "okay";
  83 +               };
  84 +       };
  85 +
  86 +       fragment@2 {
  87 +               target = <&i2c1>;
  88 +               __overlay__ {
  89 +                       #address-cells = <1>;
  90 +                       #size-cells = <0>;
  91 +                       status = "okay";
  92 +
  93 +                       pcm5122@4c {
  94 +                               #sound-dai-cells = <0>;
  95 +                               compatible = "ti,pcm5122";
  96 +                               reg = <0x4c>;
  97 +                               status = "okay";
  98 +                       };
  99 +               };
 100 +       };
 101 +
 102 +       __overrides__ {
 103 +               24db_digital_gain = <&frag0>,"iqaudio,24db_digital_gain?";
 104 +       };
 105 +};