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