ad5686_write
ret = ad5686_write(st, AD5686_CMD_POWERDOWN_DAC, address, val);
ret = ad5686_write(st, AD5686_CMD_WRITE_INPUT_N_UPDATE_N,
return ad5686_write(st, AD5686_CMD_CONTROL_REG, 0,
return ad5686_write(st, AD5686_CMD_CONTROL_REG, 0,
ret = ad5686_write(st, AD5686_CMD_INTERNAL_REFER_SETUP, 0,