TAS5822M: Failed to initialize the device on Linux

Hi

    We are trying to use TAS5822M on embedded Linux system with Yocto project.
    But we found there is someting wrong about firmware during device startup.

    [ 3.285116] tas5805m 2-002c: Direct firmware load for tas5805m_dsp_mono_pbtl_48khz.bin failed with error -2
    [ 3.285135] tas5805m 2-002c: Falling back to sysfs fallback for: tas5805m_dsp_mono_pbtl_48khz.bin
    [ 8.255592] tas5805m: probe of 2-002c failed with error -2
    [ 18.403654] platform sound-tas5822m: deferred probe pending

    So we try to got the firmware file from PPC but we don't know how to make it.

    It would be good if we could get this file directly or know how to make it.

BR
Mingheng