• Philby John's avatar
    ALSA: aaci: ARM1176 aaci-pl041 AC97 register read timeout · 29a4f2d3
    Philby John authored
    After a reboot on an ARM1176 which amounts to a softreset, it has been
    noted that the ALSA driver does not get registered and the probe fails
    with the error "aaci-pl041 fpga:04: ac97 read back fail". In the process
    of reading from a register the SL1TxBusy bit is set indicating that the
    transceiver is busy and remains so until the default timeout occurs.
    Set the Power down register 0x26 to an arbitrary value as specified in
    the PL041 manual (page: 3-18) so that AACISL1TX/AACISL2TX registers take
    their default state.
    Signed-off-by: default avatarPhilby John <pjohn@in.mvista.com>
    Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
    29a4f2d3
aaci.c 26.7 KB