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