Install latest Raspberry OS (Kernel version: 5.10) in SD card. Current driver only supported to kernel version 5.10.17, 5.10.52, 5.10.60, 5.10.63, 5.10.90, 5.10.92, 5.10.103 and 5.15.32 only.

Note: dacberry400 driver available in raspberry pi OS from kernel version 5.10.61. You need to run only dacberry400 script to enable it.

1. Download Script dacberry400.sh and place in /home/pi directory.
2. run the script. bash dacberry400.sh

You need two drivers to enable Dacberry400 Codec:

1. TLV320AIC3x CODEC driver
2. Dacberry400 Driver

1. Download kernel source code from https://github.com/raspberrypi/linux. Note: Make sure to get the soruce code for same version what you have installed in Raspberry Pi.

2. Install prerequisite and cross toolchain for compilation. Refer following link for download toolchain and setup for specific platform: https://www.raspberrypi.com/documentation/computers/linux_kernel.html

3. Before compilation, enable TLV320AIC3x CODEC driver from menconfig. it is located at:

   • Device Drivers
     • Sound card support (SOUND [=y])
       • Advanced Linux Sound Architecture (SND[=m])
         • ALSA for SoC audio support (SND_SOC [=m])
           • CODEC drivers
             • Texas Instruments TLV320AIC3x CODECs

4. Compile kernel for specific platform Refer Link: https://www.raspberrypi.com/documentation/computers/linux_kernel.html

5. After compilation, TLV320AIC3x CODEC driver located at: linux/sound/soc/codecs/snd-soc-tlv320aic3x.ko

1. Download Dacberry400.c and Makefile from https://github.com/osaelectronics/DACBerry-400.

2. compile it: make KDIR=<Kernel_path> Define the full kernel path where it is compilied.

1. Add following line in boot/config.txt

   • dtoverlay=i2c1
   • dtoverlay=dacberry400
   • gpio=26=op,dh

2. Enable i2c overlay:

   • dtparam=i2c_arm=on
   • dtparam=i2s=on

3. Disable default Audio: #dtparam=audio=on

1. Download dacberry400.dts from https://github.com/osaelectronics/DACBerry-400.

2. dtc-O dtb -o dacberry400.dtbo -b 0 -@ dacberry400.dts

3. copy dacberry400.dtb to boot/overlays/

1. Copy snd-tlv-tlv320aic3x.ko in /lib/modules/$(uname -r)/kernel/sound/soc/codecs/
2. Copy dacberry400.ko in /lib/modules/$(uname -r)/kernel/sound/soc/bcm/
3. depmod -a
4. reboot the board