1 files changed, 101 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0593-overlays-Add-ugreen-dabboard-overlay.patch b/target/linux/bcm27xx/patches-5.10/950-0593-overlays-Add-ugreen-dabboard-overlay.patch
new file mode 100644
index 0000000000..239d58cb90
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0593-overlays-Add-ugreen-dabboard-overlay.patch
@@ -0,0 +1,101 @@
+From d7a810374597774f0e01eedfc30074772f4e9f85 Mon Sep 17 00:00:00 2001
+From: Christoph <c.orth@ugreen.eu>
+Date: Wed, 28 Apr 2021 20:30:44 +0200
+Subject: [PATCH] overlays: Add ugreen-dabboard overlay
+
+This is a simple overlay based on the simple-audio-card and the dmic
+codec. It has the speciality that it is configured to use the codec
+as a master I2S device. It works for example with the Si468x DAB
+receiver on the uGreen DABBoard.
+
+See: https://github.com/raspberrypi/linux/issues/4304
+
+Signed-off-by: Christoph Orth <c.orth@ugreen.eu>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             | 10 ++++
+ .../dts/overlays/ugreen-dabboard-overlay.dts  | 49 +++++++++++++++++++
+ 3 files changed, 60 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/ugreen-dabboard-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -209,6 +209,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ 	uart4.dtbo \
+ 	uart5.dtbo \
+ 	udrc.dtbo \
++	ugreen-dabboard.dtbo \
+ 	upstream.dtbo \
+ 	upstream-pi4.dtbo \
+ 	vc4-fkms-v3d.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -3130,6 +3130,16 @@ Load:   dtoverlay=udrc,<param>=<val>
+ Params: alsaname                Name of the ALSA audio device (default "udrc")
+ 
+ 
++Name:   ugreen-dabboard
++Info:   Configures the ugreen-dabboard I2S overlay
++        This is a simple overlay based on the simple-audio-card and the dmic
++        codec. It has the speciality that it is configured to use the codec
++        as a master I2S device. It works for example with the Si468x DAB
++        receiver on the uGreen DABBoard.
++Load:   dtoverlay=ugreen-dabboard,<param>=<val>
++Params: card-name               Override the default, "dabboard", card name.
++
++
+ Name:   upstream
+ Info:   Allow usage of downstream .dtb with upstream kernel. Comprises the
+         vc4-kms-v3d and dwc2 overlays.
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/ugreen-dabboard-overlay.dts
+@@ -0,0 +1,49 @@
++// Definitions for the ugreen dabboard I2S
++/dts-v1/;
++/plugin/;
++
++/ {
++	compatible = "brcm,bcm2835";
++
++	fragment@0 {
++		target = <&i2s>;
++		__overlay__ {
++			status = "okay";
++		};
++	};
++
++	fragment@1 {
++		target-path = "/";
++		__overlay__ {
++			dmic_codec: dmic-codec {
++				#sound-dai-cells = <0>;
++				compatible = "dmic-codec";
++				status = "okay";
++			};
++		};
++	};
++
++	fragment@2 {
++		target = <&sound>;
++		sound_overlay: __overlay__ {
++			compatible = "simple-audio-card";
++			simple-audio-card,format = "i2s";
++			simple-audio-card,name = "dabboard";
++			simple-audio-card,bitclock-master = <&dailink0_slave>;
++			simple-audio-card,frame-master = <&dailink0_slave>;
++			simple-audio-card,widgets = "Microphone", "Microphone Jack";
++			status = "okay";
++			simple-audio-card,cpu {
++				sound-dai = <&i2s>;
++			};
++			dailink0_slave: simple-audio-card,codec {
++				#sound-dai-cells = <0>;
++				sound-dai = <&dmic_codec>;
++			};
++		};
++	};
++
++	__overrides__ {
++		card-name = <&sound_overlay>,"simple-audio-card,name";
++	};
++};