BA0_SPMC
snd_cs4281_pokeBA0(chip, BA0_SPMC, 0);
snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN);
snd_cs4281_pokeBA0(chip, BA0_SPMC, BA0_SPMC_RSTN | BA0_SPMC_ASDI2E);