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77 lines
3.1 KiB
Diff
77 lines
3.1 KiB
Diff
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From ee513338448ddbb72ac8f76e7053865fe926a18c 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 20:37:34 +0100
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Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+ADC sound card
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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-dacplusadc-overlay.dts | 1 +
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sound/soc/bcm/hifiberry_dacplusadc.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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@@ -927,6 +927,8 @@ 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-dacplusadcpro
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--- a/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
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@@ -67,5 +67,6 @@
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24db_digital_gain =
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<&hifiberry_dacplusadc>,"hifiberry,24db_digital_gain?";
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slave = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,slave?";
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+ leds_off = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,leds_off?";
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};
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};
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--- a/sound/soc/bcm/hifiberry_dacplusadc.c
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+++ b/sound/soc/bcm/hifiberry_dacplusadc.c
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@@ -54,6 +54,7 @@ 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_dacplusadc_select_clk(struct snd_soc_component *component,
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int clk_id)
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@@ -175,7 +176,10 @@ static int snd_rpi_hifiberry_dacplusadc_
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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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int ret;
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@@ -256,6 +260,8 @@ static int snd_rpi_hifiberry_dacplusadc_
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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,
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0x08, 0x08);
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hifiberry_dacplusadc_LED_cnt++;
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@@ -347,6 +353,8 @@ static int snd_rpi_hifiberry_dacplusadc_
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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-dacplusadc,slave");
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+ leds_off = of_property_read_bool(pdev->dev.of_node,
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+ "hifiberry-dacplusadc,leds_off");
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ret = devm_snd_soc_register_card(&pdev->dev,
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&snd_rpi_hifiberry_dacplusadc);
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