bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0416-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch b/target/linux/bcm27xx/patches-5.4/950-0416-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch
new file mode 100644
index 0000000000..bd8f405ef8
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0416-adds-LED-OFF-feature-to-HiFiBerry-DAC-ADC-sound-card.patch
@@ -0,0 +1,76 @@
+From 36949b2ea78d5782faed2fb00a037f37789fa85d 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;
+@@ -254,6 +258,8 @@ 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++;
+@@ -330,6 +336,8 @@ 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);