target/linux/bcm27xx/patches-5.4/950-0404-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch

   1 From 36949b2ea78d5782faed2fb00a037f37789fa85d Mon Sep 17 00:00:00 2001
   2 From: j-schambacher <joerg@i2audio.com>
   3 Date: Mon, 27 Jan 2020 20:37:34 +0100
   4 Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+ADC sound card
   5
   6 This adds a DT overlay parameter 'leds_off' which allows
   7 to switch off the onboard activity LEDs at all times
   8 which has been requested by some users.
   9
  10 Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
  11 ---
  12  arch/arm/boot/dts/overlays/README                      |  2 ++
  13  .../boot/dts/overlays/hifiberry-dacplusadc-overlay.dts |  1 +
  14  sound/soc/bcm/hifiberry_dacplusadc.c                   | 10 +++++++++-
  15  3 files changed, 12 insertions(+), 1 deletion(-)
  16
  17 --- a/arch/arm/boot/dts/overlays/README
  18 +++ b/arch/arm/boot/dts/overlays/README
  19 @@ -927,6 +927,8 @@ Params: 24db_digital_gain       Allow ga
  20                                  that does not result in clipping/distortion!)
  21          slave                   Force DAC+ Pro into slave mode, using Pi as
  22                                  master for bit clock and frame clock.
  23 +        leds_off                If set to 'true' the onboard indicator LEDs
  24 +                                are switched off at all times.
  25
  26
  27  Name:   hifiberry-dacplusadcpro
  28 --- a/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
  29 +++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
  30 @@ -67,5 +67,6 @@
  31                 24db_digital_gain =
  32                         <&hifiberry_dacplusadc>,"hifiberry,24db_digital_gain?";
  33                 slave = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,slave?";
  34 +               leds_off = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,leds_off?";
  35         };
  36  };
  37 --- a/sound/soc/bcm/hifiberry_dacplusadc.c
  38 +++ b/sound/soc/bcm/hifiberry_dacplusadc.c
  39 @@ -54,6 +54,7 @@ struct pcm512x_priv {
  40  static bool slave;
  41  static bool snd_rpi_hifiberry_is_dacpro;
  42  static bool digital_gain_0db_limit = true;
  43 +static bool leds_off;
  44
  45  static void snd_rpi_hifiberry_dacplusadc_select_clk(struct snd_soc_component *component,
  46         int clk_id)
  47 @@ -175,7 +176,10 @@ static int snd_rpi_hifiberry_dacplusadc_
  48
  49         snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
  50         snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
  51 -       snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  52 +       if (leds_off)
  53 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
  54 +       else
  55 +               snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
  56
  57         if (digital_gain_0db_limit) {
  58                 int ret;
  59 @@ -254,6 +258,8 @@ static int snd_rpi_hifiberry_dacplusadc_
  60         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  61         struct snd_soc_component *component = rtd->codec_dai->component;
  62
  63 +       if (leds_off)
  64 +               return 0;
  65         snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1,
  66                                          0x08, 0x08);
  67         hifiberry_dacplusadc_LED_cnt++;
  68 @@ -330,6 +336,8 @@ static int snd_rpi_hifiberry_dacplusadc_
  69                 pdev->dev.of_node, "hifiberry,24db_digital_gain");
  70         slave = of_property_read_bool(pdev->dev.of_node,
  71                                         "hifiberry-dacplusadc,slave");
  72 +       leds_off = of_property_read_bool(pdev->dev.of_node,
  73 +                                       "hifiberry-dacplusadc,leds_off");
  74
  75         ret = devm_snd_soc_register_card(&pdev->dev,
  76                                                  &snd_rpi_hifiberry_dacplusadc);