Hi Donglin, On 08/22/2017 05:08 PM, Donglin Peng wrote: >> > card->dev = &pdev->dev; >> > platform_set_drvdata(pdev, card); > There is no need to call platform_set_drvdata, because > devm_snd_soc_register_card will do it. > right, will remove it in next version, thanks:)