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From 5eccee0e620b799558d89ebee29280116ad37e4f Mon Sep 17 00:00:00 2001
From: j-schambacher <joerg@i2audio.com>
Date: Mon, 27 Jan 2020 20:58:24 +0100
Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+/DAC+PRO sound
cards
This adds a DT overlay parameter 'leds_off' which allows
to switch off the onboard activity LEDs at all times
which has been requested by some users.
Signed-off-by: Joerg Schambacher <joerg@i2audio.com>
---
arch/arm/boot/dts/overlays/README | 2 ++
.../boot/dts/overlays/hifiberry-dacplus-overlay.dts | 1 +
sound/soc/bcm/hifiberry_dacplus.c | 10 +++++++++-
3 files changed, 12 insertions(+), 1 deletion(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -906,6 +906,8 @@ Params: 24db_digital_gain Allow ga
that does not result in clipping/distortion!)
slave Force DAC+ Pro into slave mode, using Pi as
master for bit clock and frame clock.
+ leds_off If set to 'true' the onboard indicator LEDs
+ are switched off at all times.
Name: hifiberry-dacplusadc
--- a/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplus-overlay.dts
@@ -55,5 +55,6 @@
24db_digital_gain =
<&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
+ leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
};
};
--- a/sound/soc/bcm/hifiberry_dacplus.c
+++ b/sound/soc/bcm/hifiberry_dacplus.c
@@ -50,6 +50,7 @@ struct pcm512x_priv {
static bool slave;
static bool snd_rpi_hifiberry_is_dacpro;
static bool digital_gain_0db_limit = true;
+static bool leds_off;
static void snd_rpi_hifiberry_dacplus_select_clk(struct snd_soc_component *component,
int clk_id)
@@ -171,7 +172,10 @@ static int snd_rpi_hifiberry_dacplus_ini
snd_soc_component_update_bits(component, PCM512x_GPIO_EN, 0x08, 0x08);
snd_soc_component_update_bits(component, PCM512x_GPIO_OUTPUT_4, 0x0f, 0x02);
- snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
+ if (leds_off)
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x00);
+ else
+ snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
if (digital_gain_0db_limit)
{
@@ -251,6 +255,8 @@ static int snd_rpi_hifiberry_dacplus_sta
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_component *component = rtd->codec_dai->component;
+ if (leds_off)
+ return 0;
snd_soc_component_update_bits(component, PCM512x_GPIO_CONTROL_1, 0x08, 0x08);
return 0;
}
@@ -319,6 +325,8 @@ static int snd_rpi_hifiberry_dacplus_pro
pdev->dev.of_node, "hifiberry,24db_digital_gain");
slave = of_property_read_bool(pdev->dev.of_node,
"hifiberry-dacplus,slave");
+ leds_off = of_property_read_bool(pdev->dev.of_node,
+ "hifiberry-dacplus,leds_off");
}
ret = devm_snd_soc_register_card(&pdev->dev,
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