cs4398_write
cs4398_write(chip, 8, CS4398_CPEN | CS4398_PDN);
cs4398_write(chip, 2, data->cs4398_regs[2]);
cs4398_write(chip, 3, CS4398_ATAPI_B_R | CS4398_ATAPI_A_L);
cs4398_write(chip, 4, data->cs4398_regs[4]);
cs4398_write(chip, 5, data->cs4398_regs[5]);
cs4398_write(chip, 6, data->cs4398_regs[6]);
cs4398_write(chip, 7, data->cs4398_regs[7]);
cs4398_write(chip, 8, CS4398_CPEN);
cs4398_write(chip, 7, reg);
cs4398_write(chip, reg, value);