target/linux/bcm27xx/patches-5.10/950-0450-Adds-the-DT-overlays-to-support-Hifiberry-AMP100.patch

   1 From bcaa1b9dcc731ff3d7a8d36769062e9571d0738c Mon Sep 17 00:00:00 2001
   2 From: Joerg Schambacher <joerg@i2audio.com>
   3 Date: Fri, 29 Jan 2021 08:26:44 +0100
   4 Subject: [PATCH] Adds the DT-overlays to support Hifiberry AMP100
   5
   6 Adds new DT-overlay to control AMP100.
   7
   8 Signed-off-by: Joerg Schambacher <joerg@hifiberry.com>
   9 ---
  10  arch/arm/boot/dts/overlays/Makefile           |  1 +
  11  arch/arm/boot/dts/overlays/README             | 30 ++++++++-
  12  .../dts/overlays/hifiberry-amp100-overlay.dts | 64 +++++++++++++++++++
  13  3 files changed, 94 insertions(+), 1 deletion(-)
  14  create mode 100644 arch/arm/boot/dts/overlays/hifiberry-amp100-overlay.dts
  15
  16 --- a/arch/arm/boot/dts/overlays/Makefile
  17 +++ b/arch/arm/boot/dts/overlays/Makefile
  18 @@ -61,6 +61,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
  19         hd44780-lcd.dtbo \
  20         hdmi-backlight-hwhack-gpio.dtbo \
  21         hifiberry-amp.dtbo \
  22 +       hifiberry-amp100.dtbo \
  23         hifiberry-dac.dtbo \
  24         hifiberry-dacplus.dtbo \
  25         hifiberry-dacplusadc.dtbo \
  26 --- a/arch/arm/boot/dts/overlays/README
  27 +++ b/arch/arm/boot/dts/overlays/README
  28 @@ -1059,8 +1059,36 @@ Load:   dtoverlay=hifiberry-amp
  29  Params: <None>
  30
  31
  32 +Name:   hifiberry-amp100
  33 +Info:   Configures the HifiBerry AMP100 audio card
  34 +Load:   dtoverlay=hifiberry-amp100,<param>=<val>
  35 +Params: 24db_digital_gain       Allow gain to be applied via the PCM512x codec
  36 +                                Digital volume control. Enable with
  37 +                                "dtoverlay=hifiberry-amp100,24db_digital_gain"
  38 +                                (The default behaviour is that the Digital
  39 +                                volume control is limited to a maximum of
  40 +                                0dB. ie. it can attenuate but not provide
  41 +                                gain. For most users, this will be desired
  42 +                                as it will prevent clipping. By appending
  43 +                                the 24dB_digital_gain parameter, the Digital
  44 +                                volume control will allow up to 24dB of
  45 +                                gain. If this parameter is enabled, it is the
  46 +                                responsibility of the user to ensure that
  47 +                                the Digital volume control is set to a value
  48 +                                that does not result in clipping/distortion!)
  49 +        slave                   Force DAC+ Pro into slave mode, using Pi as
  50 +                                master for bit clock and frame clock.
  51 +        leds_off                If set to 'true' the onboard indicator LEDs
  52 +                                are switched off at all times.
  53 +        auto_mute               If set to 'true' the amplifier is automatically
  54 +                                muted when the DAC is not playing.
  55 +        mute_ext_ctl            The amplifier's HW mute control is enabled
  56 +                                in ALSA mixer and set to <val>.
  57 +                                Will be overwritten by ALSA user settings.
  58 +
  59 +
  60  Name:   hifiberry-dac
  61 -Info:   Configures the HifiBerry DAC audio card
  62 +Info:   Configures the HifiBerry DAC audio cards
  63  Load:   dtoverlay=hifiberry-dac
  64  Params: <None>
  65
  66 --- /dev/null
  67 +++ b/arch/arm/boot/dts/overlays/hifiberry-amp100-overlay.dts
  68 @@ -0,0 +1,64 @@
  69 +// Definitions for HiFiBerry AMP100
  70 +/dts-v1/;
  71 +/plugin/;
  72 +
  73 +/ {
  74 +       compatible = "brcm,bcm2835";
  75 +
  76 +       fragment@0 {
  77 +               target-path = "/";
  78 +               __overlay__ {
  79 +                       dacpro_osc: dacpro_osc {
  80 +                               compatible = "hifiberry,dacpro-clk";
  81 +                               #clock-cells = <0>;
  82 +                       };
  83 +               };
  84 +       };
  85 +
  86 +       fragment@1 {
  87 +               target = <&i2s>;
  88 +               __overlay__ {
  89 +                       status = "okay";
  90 +               };
  91 +       };
  92 +
  93 +       fragment@2 {
  94 +               target = <&i2c1>;
  95 +               __overlay__ {
  96 +                       #address-cells = <1>;
  97 +                       #size-cells = <0>;
  98 +                       status = "okay";
  99 +
 100 +                       pcm5122@4d {
 101 +                               #sound-dai-cells = <0>;
 102 +                               compatible = "ti,pcm5122";
 103 +                               reg = <0x4d>;
 104 +                               clocks = <&dacpro_osc>;
 105 +                               AVDD-supply = <&vdd_3v3_reg>;
 106 +                               DVDD-supply = <&vdd_3v3_reg>;
 107 +                               CPVDD-supply = <&vdd_3v3_reg>;
 108 +                               status = "okay";
 109 +                       };
 110 +               };
 111 +       };
 112 +
 113 +       fragment@3 {
 114 +               target = <&sound>;
 115 +               hifiberry_dacplus: __overlay__ {
 116 +                       compatible = "hifiberry,hifiberry-dacplus";
 117 +                       i2s-controller = <&i2s>;
 118 +                       status = "okay";
 119 +                       mute-gpio = <&gpio 4 0>;
 120 +                       reset-gpio = <&gpio 17 0x11>;
 121 +               };
 122 +       };
 123 +
 124 +       __overrides__ {
 125 +               24db_digital_gain =
 126 +                       <&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
 127 +               slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
 128 +               leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
 129 +               mute_ext_ctl = <&hifiberry_dacplus>,"hifiberry-dacplus,mute_ext_ctl:0";
 130 +               auto_mute = <&hifiberry_dacplus>,"hifiberry-dacplus,auto_mute?";
 131 +       };
 132 +};