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78 lines
3.0 KiB
Diff
78 lines
3.0 KiB
Diff
From 4b3cdf84c4d8156c01fa02e4d511f7529cae488f Mon Sep 17 00:00:00 2001
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From: j-schambacher <joerg@i2audio.com>
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Date: Mon, 27 Jan 2020 20:58:24 +0100
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Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+/DAC+PRO sound
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cards
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This adds a DT overlay parameter 'leds_off' which allows
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to switch off the onboard activity LEDs at all times
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which has been requested by some users.
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Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
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---
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arch/arm/boot/dts/overlays/README | 2 ++
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.../boot/dts/overlays/hifiberry-dacplus-overlay.dts | 1 +
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sound/soc/bcm/hifiberry_dacplus.c | 10 +++++++++-
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3 files changed, 12 insertions(+), 1 deletion(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -906,6 +906,8 @@ Params: 24db_digital_gain Allow ga
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that does not result in clipping/distortion!)
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slave Force DAC+ Pro into slave mode, using Pi as
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master for bit clock and frame clock.
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+ leds_off If set to 'true' the onboard indicator LEDs
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+ are switched off at all times.
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Name: hifiberry-dacplusadc
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--- a/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
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@@ -55,5 +55,6 @@
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24db_digital_gain =
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<&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
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slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
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+ leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
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};
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};
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--- a/sound/soc/bcm/hifiberry_dacplus.c
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+++ b/sound/soc/bcm/hifiberry_dacplus.c
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@@ -50,6 +50,7 @@ struct pcm512x_priv {
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static bool slave;
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static bool snd_rpi_hifiberry_is_dacpro;
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static bool digital_gain_0db_limit = true;
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+static bool leds_off;
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static void snd_rpi_hifiberry_dacplus_select_clk(struct snd_soc_component *component,
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int clk_id)
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@@ -171,7 +172,10 @@ static int snd_rpi_hifiberry_dacplus_ini
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snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
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snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
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- snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
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+ if (leds_off)
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+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
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+ else
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+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
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if (digital_gain_0db_limit)
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{
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@@ -249,6 +253,8 @@ static int snd_rpi_hifiberry_dacplus_sta
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_component *component = rtd->codec_dai->component;
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+ if (leds_off)
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+ return 0;
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snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
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return 0;
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}
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@@ -319,6 +325,8 @@ static int snd_rpi_hifiberry_dacplus_pro
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pdev->dev.of_node, "hifiberry,24db_digital_gain");
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slave = of_property_read_bool(pdev->dev.of_node,
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"hifiberry-dacplus,slave");
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+ leds_off = of_property_read_bool(pdev->dev.of_node,
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+ "hifiberry-dacplus,leds_off");
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}
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ret = devm_snd_soc_register_card(&pdev->dev,
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