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HiFiBerry DAC+ and OpenWRT

Hello
I cannot run HiFiBerry DAC + on OpenWRT 19.07. After installing the package: kmod-sound-soc-hifiberry-dacplus and configuring the /boot/config.txt file according to instructions from the page:
https://www.hifiberry.com/docs/software/configuring-linux-3-18-x/
the card is not detected in the system.

However, after installing the kmod-sound-soc-hifiberry-dac module, the card is detected
kern.info kernel: [7.935916] snd-hifiberry-dac soc: sound: ASoC: CODEC DAI pcm5102a-hifi not registered - will retry
kern.info kernel: [7.956157] snd-hifiberry-dac soc: sound: pcm5102a-hifi <-> 20203000.i2s mapping ok

root @ OpenWrt: ~ # aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: sndrpihifiberry [snd_rpi_hifiberry_dac], device 0: HifiBerry DAC HiFi pcm5102a-hifi-0 [HifiBerry DAC HiFi pcm5102a-hifi-0]
Subdevices: 1/1
Subdevice # 0: subdevice # 0

but it doesn't work

Please help.

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