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

   1 From 4a773d6535c3386044490156264ebd2a3b1bc38b Mon Sep 17 00:00:00 2001
   2 From: j-schambacher <joerg@i2audio.com>
   3 Date: Mon, 27 Jan 2020 17:45:51 +0100
   4 Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+ADC PRO sound
   5  card
   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  .../overlays/hifiberry-dacplusadcpro-overlay.dts  |  1 +
  15  sound/soc/bcm/hifiberry_dacplusadcpro.c           | 15 +++++++++++++--
  16  3 files changed, 16 insertions(+), 2 deletions(-)
  17
  18 --- a/arch/arm/boot/dts/overlays/README
  19 +++ b/arch/arm/boot/dts/overlays/README
  20 @@ -948,6 +948,8 @@ Params: 24db_digital_gain       Allow ga
  21                                  that does not result in clipping/distortion!)
  22          slave                   Force DAC+ADC 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-dacplusdsp
  29 --- a/arch/arm/boot/dts/overlays/hifiberry-dacplusadcpro-overlay.dts
  30 +++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadcpro-overlay.dts
  31 @@ -60,5 +60,6 @@
  32                 24db_digital_gain =
  33                         <&hifiberry_dacplusadcpro>,"hifiberry-dacplusadcpro,24db_digital_gain?";
  34                 slave = <&hifiberry_dacplusadcpro>,"hifiberry-dacplusadcpro,slave?";
  35 +               leds_off = <&hifiberry_dacplusadcpro>,"hifiberry-dacplusadcpro,leds_off?";
  36         };
  37  };
  38 --- a/sound/soc/bcm/hifiberry_dacplusadcpro.c
  39 +++ b/sound/soc/bcm/hifiberry_dacplusadcpro.c
  40 @@ -54,6 +54,7 @@ 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 const unsigned int pcm186x_adc_input_channel_sel_value[] = {
  47         0x00, 0x01, 0x02, 0x03, 0x10
  48 @@ -321,7 +322,10 @@ static int snd_rpi_hifiberry_dacplusadcp
  49
  50         snd_soc_component_update_bits(dac, PCM512x_GPIO_EN, 0x08, 0x08);
  51         snd_soc_component_update_bits(dac, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
  52 -       snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  53 +       if (leds_off)
  54 +               snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
  55 +       else
  56 +               snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  57
  58         ret = pcm1863_add_controls(adc);
  59         if (ret < 0)
  60 @@ -331,7 +335,10 @@ static int snd_rpi_hifiberry_dacplusadcp
  61         /* set GPIO2 to output, GPIO3 input */
  62         snd_soc_component_write(adc, PCM186X_GPIO3_2_CTRL, 0x00);
  63         snd_soc_component_write(adc, PCM186X_GPIO3_2_DIR_CTRL, 0x04);
  64 -       snd_soc_component_update_bits(adc, PCM186X_GPIO_IN_OUT, 0x40, 0x40);
  65 +       if (leds_off)
  66 +               snd_soc_component_update_bits(adc, PCM186X_GPIO_IN_OUT, 0x40, 0x00);
  67 +       else
  68 +               snd_soc_component_update_bits(adc, PCM186X_GPIO_IN_OUT, 0x40, 0x40);
  69
  70         if (digital_gain_0db_limit) {
  71                 int ret;
  72 @@ -417,6 +424,8 @@ static int snd_rpi_hifiberry_dacplusadcp
  73         struct snd_soc_component *dac = rtd->codec_dais[0]->component;
  74         struct snd_soc_component *adc = rtd->codec_dais[1]->component;
  75
  76 +       if (leds_off)
  77 +               return 0;
  78         /* switch on respective LED */
  79         if (!substream->stream)
  80                 snd_soc_component_update_bits(dac, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  81 @@ -500,6 +509,8 @@ static int snd_rpi_hifiberry_dacplusadcp
  82                 pdev->dev.of_node, "hifiberry-dacplusadcpro,24db_digital_gain");
  83         slave = of_property_read_bool(pdev->dev.of_node,
  84                                         "hifiberry-dacplusadcpro,slave");
  85 +       leds_off = of_property_read_bool(pdev->dev.of_node,
  86 +                                       "hifiberry-dacplusadcpro,leds_off");
  87         ret = snd_soc_register_card(&snd_rpi_hifiberry_dacplusadcpro);
  88         if (ret && ret != -EPROBE_DEFER)
  89                 dev_err(&pdev->dev,