target/linux/bcm27xx/patches-5.10/950-0593-overlays-Add-ugreen-dabboard-overlay.patch

   1 From d7a810374597774f0e01eedfc30074772f4e9f85 Mon Sep 17 00:00:00 2001
   2 From: Christoph <c.orth@ugreen.eu>
   3 Date: Wed, 28 Apr 2021 20:30:44 +0200
   4 Subject: [PATCH] overlays: Add ugreen-dabboard overlay
   5
   6 This is a simple overlay based on the simple-audio-card and the dmic
   7 codec. It has the speciality that it is configured to use the codec
   8 as a master I2S device. It works for example with the Si468x DAB
   9 receiver on the uGreen DABBoard.
  10
  11 See: https://github.com/raspberrypi/linux/issues/4304
  12
  13 Signed-off-by: Christoph Orth <c.orth@ugreen.eu>
  14 ---
  15  arch/arm/boot/dts/overlays/Makefile           |  1 +
  16  arch/arm/boot/dts/overlays/README             | 10 ++++
  17  .../dts/overlays/ugreen-dabboard-overlay.dts  | 49 +++++++++++++++++++
  18  3 files changed, 60 insertions(+)
  19  create mode 100644 arch/arm/boot/dts/overlays/ugreen-dabboard-overlay.dts
  20
  21 --- a/arch/arm/boot/dts/overlays/Makefile
  22 +++ b/arch/arm/boot/dts/overlays/Makefile
  23 @@ -209,6 +209,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  24         uart4.dtbo \
  25         uart5.dtbo \
  26         udrc.dtbo \
  27 +       ugreen-dabboard.dtbo \
  28         upstream.dtbo \
  29         upstream-pi4.dtbo \
  30         vc4-fkms-v3d.dtbo \
  31 --- a/arch/arm/boot/dts/overlays/README
  32 +++ b/arch/arm/boot/dts/overlays/README
  33 @@ -3130,6 +3130,16 @@ Load:   dtoverlay=udrc,<param>=<val>
  34  Params: alsaname                Name of the ALSA audio device (default "udrc")
  35
  36
  37 +Name:   ugreen-dabboard
  38 +Info:   Configures the ugreen-dabboard I2S overlay
  39 +        This is a simple overlay based on the simple-audio-card and the dmic
  40 +        codec. It has the speciality that it is configured to use the codec
  41 +        as a master I2S device. It works for example with the Si468x DAB
  42 +        receiver on the uGreen DABBoard.
  43 +Load:   dtoverlay=ugreen-dabboard,<param>=<val>
  44 +Params: card-name               Override the default, "dabboard", card name.
  45 +
  46 +
  47  Name:   upstream
  48  Info:   Allow usage of downstream .dtb with upstream kernel. Comprises the
  49          vc4-kms-v3d and dwc2 overlays.
  50 --- /dev/null
  51 +++ b/arch/arm/boot/dts/overlays/ugreen-dabboard-overlay.dts
  52 @@ -0,0 +1,49 @@
  53 +// Definitions for the ugreen dabboard I2S
  54 +/dts-v1/;
  55 +/plugin/;
  56 +
  57 +/ {
  58 +       compatible = "brcm,bcm2835";
  59 +
  60 +       fragment@0 {
  61 +               target = <&i2s>;
  62 +               __overlay__ {
  63 +                       status = "okay";
  64 +               };
  65 +       };
  66 +
  67 +       fragment@1 {
  68 +               target-path = "/";
  69 +               __overlay__ {
  70 +                       dmic_codec: dmic-codec {
  71 +                               #sound-dai-cells = <0>;
  72 +                               compatible = "dmic-codec";
  73 +                               status = "okay";
  74 +                       };
  75 +               };
  76 +       };
  77 +
  78 +       fragment@2 {
  79 +               target = <&sound>;
  80 +               sound_overlay: __overlay__ {
  81 +                       compatible = "simple-audio-card";
  82 +                       simple-audio-card,format = "i2s";
  83 +                       simple-audio-card,name = "dabboard";
  84 +                       simple-audio-card,bitclock-master = <&dailink0_slave>;
  85 +                       simple-audio-card,frame-master = <&dailink0_slave>;
  86 +                       simple-audio-card,widgets = "Microphone", "Microphone Jack";
  87 +                       status = "okay";
  88 +                       simple-audio-card,cpu {
  89 +                               sound-dai = <&i2s>;
  90 +                       };
  91 +                       dailink0_slave: simple-audio-card,codec {
  92 +                               #sound-dai-cells = <0>;
  93 +                               sound-dai = <&dmic_codec>;
  94 +                       };
  95 +               };
  96 +       };
  97 +
  98 +       __overrides__ {
  99 +               card-name = <&sound_overlay>,"simple-audio-card,name";
 100 +       };
 101 +};