Hi, On 11/1/2023, at 9:38, povik+lin@xxxxxxxxxxx wrote: > Hi, > the issue here would be that it’s possible to select your driver for compilation without > having selected the CRC8 functions, leading to the linkage error. > You can fix that by adding ’select CRC8’ under the Kconfig section of your driver, similarly > to how the SND_SOC_SIGMADSP symbol selects CRC32. Thank you very much for your advice. I will correct this mistake > Best regards, > Martin Best regards, Weidong Wang