git.ipfire.org Git - thirdparty/openwrt.git/blob

   1 From 209e8a3e6646f25abb352fd5a8a4c2e855b1e952 Mon Sep 17 00:00:00 2001
   2 From: Adrian Figueroa <elagil@takanome.de>
   3 Date: Wed, 14 Aug 2024 20:00:12 +0200
   4 Subject: [PATCH 1219/1350] overlays: add overlay for generic I2S clock-master
   5  DAC
   6
   7 Adds an overlay for supporting a generic I2S DAC that
   8 acts as the clock master on the bus.
   9 The data format is 32 bit stereo.
  10
  11 Signed-off-by: Adrian Figueroa <elagil@takanome.de>
  12 ---
  13  arch/arm/boot/dts/overlays/Makefile           |  1 +
  14  arch/arm/boot/dts/overlays/README             |  6 +++
  15  .../dts/overlays/i2s-master-dac-overlay.dts   | 50 +++++++++++++++++++
  16  3 files changed, 57 insertions(+)
  17  create mode 100644 arch/arm/boot/dts/overlays/i2s-master-dac-overlay.dts
  18
  19 --- a/arch/arm/boot/dts/overlays/Makefile
  20 +++ b/arch/arm/boot/dts/overlays/Makefile
  21 @@ -125,6 +125,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  22         i2c6.dtbo \
  23         i2s-dac.dtbo \
  24         i2s-gpio28-31.dtbo \
  25 +       i2s-master-dac.dtbo \
  26         ilitek251x.dtbo \
  27         imx219.dtbo \
  28         imx258.dtbo \
  29 --- a/arch/arm/boot/dts/overlays/README
  30 +++ b/arch/arm/boot/dts/overlays/README
  31 @@ -2633,6 +2633,12 @@ Load:   dtoverlay=i2s-gpio28-31
  32  Params: <None>
  33
  34
  35 +Name:   i2s-master-dac
  36 +Info:   Configures a generic I2S DAC soundcard that acts as a clock master.
  37 +Load:   dtoverlay=i2s-master-dac
  38 +Params: <None>
  39 +
  40 +
  41  Name:   ilitek251x
  42  Info:   Enables I2C connected Ilitek 251x multiple touch controller using
  43          GPIO 4 (pin 7 on GPIO header) for interrupt.
  44 --- /dev/null
  45 +++ b/arch/arm/boot/dts/overlays/i2s-master-dac-overlay.dts
  46 @@ -0,0 +1,50 @@
  47 +// Definitions for a generic I2S DAC that acts as clock master on the bus.
  48 +/dts-v1/;
  49 +/plugin/;
  50 +
  51 +/ {
  52 +       compatible = "brcm,bcm2835";
  53 +
  54 +       fragment@0 {
  55 +               target = <&i2s_clk_consumer>;
  56 +               __overlay__ {
  57 +                       status = "okay";
  58 +               };
  59 +       };
  60 +
  61 +       fragment@1 {
  62 +               target-path = "/";
  63 +               __overlay__ {
  64 +                       codec_bare: codec_bare {
  65 +                               compatible = "linux,spdif-dit";
  66 +                               #sound-dai-cells = <0>;
  67 +                               status = "okay";
  68 +                       };
  69 +               };
  70 +       };
  71 +
  72 +       fragment@2 {
  73 +               target = <&sound>;
  74 +               __overlay__ {
  75 +                       compatible = "simple-audio-card";
  76 +                       i2s-controller = <&i2s_clk_consumer>;
  77 +                       status = "okay";
  78 +
  79 +                       simple-audio-card,name = "i2s-master-dac";
  80 +                       simple-audio-card,format = "i2s";
  81 +
  82 +                       simple-audio-card,bitclock-master = <&snd_codec>;
  83 +                       simple-audio-card,frame-master = <&snd_codec>;
  84 +
  85 +                       simple-audio-card,cpu {
  86 +                               sound-dai = <&i2s_clk_consumer>;
  87 +                               dai-tdm-slot-num = <2>;
  88 +                               dai-tdm-slot-width = <32>;
  89 +                       };
  90 +
  91 +                       snd_codec: simple-audio-card,codec {
  92 +                               sound-dai = <&codec_bare>;
  93 +                       };
  94 +               };
  95 +       };
  96 +};