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From ee513338448ddbb72ac8f76e7053865fe926a18c Mon Sep 17 00:00:00 2001
From: j-schambacher <joerg@i2audio.com>
Date: Mon, 27 Jan 2020 20:37:34 +0100
Subject: [PATCH] adds LED OFF feature to HiFiBerry DAC+ADC sound card
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-dacplusadc-overlay.dts | 1 +
sound/soc/bcm/hifiberry_dacplusadc.c | 10 +++++++++-
3 files changed, 12 insertions(+), 1 deletion(-)
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -927,6 +927,8 @@ 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-dacplusadcpro
--- a/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
+++ b/arch/arm/boot/dts/overlays/hifiberry-dacplusadc-overlay.dts
@@ -67,5 +67,6 @@
24db_digital_gain =
<&hifiberry_dacplusadc>,"hifiberry,24db_digital_gain?";
slave = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,slave?";
+ leds_off = <&hifiberry_dacplusadc>,"hifiberry-dacplusadc,leds_off?";
};
};
--- a/sound/soc/bcm/hifiberry_dacplusadc.c
+++ b/sound/soc/bcm/hifiberry_dacplusadc.c
@@ -54,6 +54,7 @@ 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_dacplusadc_select_clk(struct snd_soc_component *component,
int clk_id)
@@ -175,7 +176,10 @@ static int snd_rpi_hifiberry_dacplusadc_
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) {
int ret;
@@ -256,6 +260,8 @@ static int snd_rpi_hifiberry_dacplusadc_
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);
hifiberry_dacplusadc_LED_cnt++;
@@ -347,6 +353,8 @@ static int snd_rpi_hifiberry_dacplusadc_
pdev->dev.of_node, "hifiberry,24db_digital_gain");
slave = of_property_read_bool(pdev->dev.of_node,
"hifiberry-dacplusadc,slave");
+ leds_off = of_property_read_bool(pdev->dev.of_node,
+ "hifiberry-dacplusadc,leds_off");
ret = devm_snd_soc_register_card(&pdev->dev,
&snd_rpi_hifiberry_dacplusadc);
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