git.openwrt.org Git - openwrt/staging/linusw.git/blob

   1 From 4b3cdf84c4d8156c01fa02e4d511f7529cae488f Mon Sep 17 00:00:00 2001
   2 From: j-schambacher <joerg@i2audio.com>
   3 Date: Mon, 27 Jan 2020 20:58:24 +0100
   4 Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+/DAC+PRO sound
   5  cards
   6
   7 This adds a DT overlay parameter 'leds_off' which allows
   8 to switch off the onboard activity LEDs at all times
   9 which has been requested by some users.
  10
  11 Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
  12 ---
  13  arch/arm/boot/dts/overlays/README                      |  2 ++
  14  .../boot/dts/overlays/hifiberry-dacplus-overlay.dts    |  1 +
  15  sound/soc/bcm/hifiberry_dacplus.c                      | 10 +++++++++-
  16  3 files changed, 12 insertions(+), 1 deletion(-)
  17
  18 --- a/arch/arm/boot/dts/overlays/README
  19 +++ b/arch/arm/boot/dts/overlays/README
  20 @@ -906,6 +906,8 @@ Params: 24db_digital_gain       Allow ga
  21                                  that does not result in clipping/distortion!)
  22          slave                   Force DAC+ Pro into slave mode, using Pi as
  23                                  master for bit clock and frame clock.
  24 +        leds_off                If set to 'true' the onboard indicator LEDs
  25 +                                are switched off at all times.
  26
  27
  28  Name:   hifiberry-dacplusadc
  29 --- a/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
  30 +++ b/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
  31 @@ -55,5 +55,6 @@
  32                 24db_digital_gain =
  33                         <&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
  34                 slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
  35 +               leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
  36         };
  37  };
  38 --- a/sound/soc/bcm/hifiberry_dacplus.c
  39 +++ b/sound/soc/bcm/hifiberry_dacplus.c
  40 @@ -50,6 +50,7 @@ struct pcm512x_priv {
  41  static bool slave;
  42  static bool snd_rpi_hifiberry_is_dacpro;
  43  static bool digital_gain_0db_limit = true;
  44 +static bool leds_off;
  45
  46  static void snd_rpi_hifiberry_dacplus_select_clk(struct snd_soc_component *component,
  47         int clk_id)
  48 @@ -171,7 +172,10 @@ static int snd_rpi_hifiberry_dacplus_ini
  49
  50         snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
  51         snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
  52 -       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  53 +       if (leds_off)
  54 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
  55 +       else
  56 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  57
  58         if (digital_gain_0db_limit)
  59         {
  60 @@ -249,6 +253,8 @@ static int snd_rpi_hifiberry_dacplus_sta
  61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  62         struct snd_soc_component *component = rtd->codec_dai->component;
  63
  64 +       if (leds_off)
  65 +               return 0;
  66         snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  67         return 0;
  68  }
  69 @@ -319,6 +325,8 @@ static int snd_rpi_hifiberry_dacplus_pro
  70                         pdev->dev.of_node, "hifiberry,24db_digital_gain");
  71                 slave = of_property_read_bool(pdev->dev.of_node,
  72                                                 "hifiberry-dacplus,slave");
  73 +               leds_off = of_property_read_bool(pdev->dev.of_node,
  74 +                                               "hifiberry-dacplus,leds_off");
  75         }
  76
  77         ret = devm_snd_soc_register_card(&pdev->dev,