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

   1 From 00fa941a2c5be22d7ab5034458b1275d108c18bb 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] Add support for the Digital Dreamtime Akkordion music player.
   5
   6 Support the Digital Dreamtime Akkordion using the OEM IQAudIO DAC+ or
   7 DACZero modules. Set ALSA card name, ("Akkordion"), from dt config.
   8
   9 Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
  10 ---
  11  arch/arm/boot/dts/overlays/Makefile                |  1 +
  12  arch/arm/boot/dts/overlays/README                  | 20 ++++++++++
  13  .../dts/overlays/akkordion-iqdacplus-overlay.dts   | 46 ++++++++++++++++++++++
  14  3 files changed, 67 insertions(+)
  15  create mode 100644 arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
  16
  17 --- a/arch/arm/boot/dts/overlays/Makefile
  18 +++ b/arch/arm/boot/dts/overlays/Makefile
  19 @@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
  20  endif
  21
  22  dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
  23 +dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
  24  dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
  25  dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
  26  dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
  27 --- a/arch/arm/boot/dts/overlays/README
  28 +++ b/arch/arm/boot/dts/overlays/README
  29 @@ -186,6 +186,26 @@ Params: cs                      SPI bus
  30          www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
  31
  32
  33 +Name:   akkordion-iqdacplus
  34 +Info:   Configures the Digital Dreamtime Akkordion Music Player (based on the
  35 +        OEM IQAudIO DAC+ or DAC Zero module).
  36 +Load:   dtoverlay=akkordion-iqdacplus,<param>=<val>
  37 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  38 +                                Digital volume control. Enable with
  39 +                                dtoverlay=akkordion-iqdacplus,24db_digital_gain
  40 +                                (The default behaviour is that the Digital
  41 +                                volume control is limited to a maximum of
  42 +                                0dB. ie. it can attenuate but not provide
  43 +                                gain. For most users, this will be desired
  44 +                                as it will prevent clipping. By appending
  45 +                                the 24db_digital_gain parameter, the Digital
  46 +                                volume control will allow up to 24dB of
  47 +                                gain. If this parameter is enabled, it is the
  48 +                                responsibility of the user to ensure that
  49 +                                the Digital volume control is set to a value
  50 +                                that does not result in clipping/distortion!)
  51 +
  52 +
  53  Name:   at86rf233
  54  Info:   Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
  55          connected to spi0.0
  56 --- /dev/null
  57 +++ b/arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
  58 @@ -0,0 +1,46 @@
  59 +// Definitions for Digital Dreamtime Akkordion using IQaudIO DAC+ or DACZero
  60 +/dts-v1/;
  61 +/plugin/;
  62 +
  63 +/ {
  64 +       compatible = "brcm,bcm2708";
  65 +
  66 +       fragment@0 {
  67 +               target = <&sound>;
  68 +               frag0: __overlay__ {
  69 +                       compatible = "iqaudio,iqaudio-dac";
  70 +                       card_name = "Akkordion";
  71 +                       dai_name = "IQaudIO DAC";
  72 +                       dai_stream_name = "IQaudIO DAC HiFi";
  73 +                       i2s-controller = <&i2s>;
  74 +                       status = "okay";
  75 +               };
  76 +       };
  77 +
  78 +       fragment@1 {
  79 +               target = <&i2s>;
  80 +               __overlay__ {
  81 +                       status = "okay";
  82 +               };
  83 +       };
  84 +
  85 +       fragment@2 {
  86 +               target = <&i2c1>;
  87 +               __overlay__ {
  88 +                       #address-cells = <1>;
  89 +                       #size-cells = <0>;
  90 +                       status = "okay";
  91 +
  92 +                       pcm5122@4c {
  93 +                               #sound-dai-cells = <0>;
  94 +                               compatible = "ti,pcm5122";
  95 +                               reg = <0x4c>;
  96 +                               status = "okay";
  97 +                       };
  98 +               };
  99 +       };
 100 +
 101 +       __overrides__ {
 102 +               24db_digital_gain = <&frag0>,"iqaudio,24db_digital_gain?";
 103 +       };
 104 +};