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From 63f4efd396406bcfea7f72c4ba883a9acf0e039c Mon Sep 17 00:00:00 2001
From: "chipdip.lab" <43340836+chipdipru@users.noreply.github.com>
Date: Fri, 9 Jul 2021 16:00:22 +0300
Subject: [PATCH] overlays: Add overlay for Chipdip I2S master DAC
Signed-off-by: Evgenij Sapunov <evgenij.sapunov@chipdip.ru>
---
arch/arm/boot/dts/overlays/Makefile | 1 +
arch/arm/boot/dts/overlays/README | 6 +++
.../chipdip-i2s-master-dac-overlay.dts | 53 +++++++++++++++++++
3 files changed, 60 insertions(+)
create mode 100644 arch/arm/boot/dts/overlays/chipdip-i2s-master-dac-overlay.dts
--- a/arch/arm/boot/dts/overlays/Makefile
+++ b/arch/arm/boot/dts/overlays/Makefile
@@ -30,6 +30,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
audiosense-pi.dtbo \
audremap.dtbo \
balena-fin.dtbo \
+ chipdip-i2s-master-dac.dtbo \
cma.dtbo \
dht11.dtbo \
dionaudio-loco.dtbo \
--- a/arch/arm/boot/dts/overlays/README
+++ b/arch/arm/boot/dts/overlays/README
@@ -622,6 +622,12 @@ Info: This overlay is now deprecated -
Load: <Deprecated>
+Name: chipdip-i2s-master-dac
+Info: Configures Raspberry PI to work as I2S slave with BCLK=64Fs.
+Load: dtoverlay=chipdip-i2s-master-dac
+Params: <None>
+
+
Name: cma
Info: Set custom CMA sizes, only use if you know what you are doing, might
clash with other overlays like vc4-fkms-v3d and vc4-kms-v3d.
--- /dev/null
+++ b/arch/arm/boot/dts/overlays/chipdip-i2s-master-dac-overlay.dts
@@ -0,0 +1,53 @@
+/*
+ * Device Tree overlay for ChipDip I2S master DAC
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+ compatible = "brcm,bcm2835";
+ fragment@0 {
+ target = <&sound>;
+ __overlay__ {
+ compatible = "simple-audio-card";
+ simple-audio-card,name = "ChipDip I2S master DAC";
+ status="okay";
+ playback_link: simple-audio-card,dai-link@0 {
+ format = "i2s";
+ bitclock-master = <&p_codec_dai>;
+ frame-master = <&p_codec_dai>;
+ p_cpu_dai: cpu {
+ sound-dai = <&i2s>;
+ dai-tdm-slot-num = <2>;
+ dai-tdm-slot-width = <32>;
+ };
+
+ p_codec_dai: codec {
+ sound-dai = <&codec_out>;
+ };
+ };
+ };
+ };
+
+ fragment@1 {
+ target-path = "/";
+ __overlay__ {
+ codec_out: spdif-transmitter {
+ #address-cells = <0>;
+ #size-cells = <0>;
+ #sound-dai-cells = <0>;
+ compatible = "linux,spdif-dit";
+ status = "okay";
+ };
+ };
+ };
+
+ fragment@2 {
+ target = <&i2s>;
+ __overlay__ {
+ #sound-dai-cells = <0>;
+ status = "okay";
+ };
+ };
+};
|
