Hi Sergei, > The subject also could be more concise... I'll think about it. Thank you! > Not at all so common as I thought! Only 4 drivers use mdio-bitbang, > 2 of them are for the Renesas SoCs... Yes. > Do yuo have R-Car V3H at hand, by chance? It does have a GEther > controler used for booting up... I'm sorry. I don't have it. There is a SILK board of R-Car Gen2 in the office where I work. But I can't go to the office now because of the COVID-19 problem. If I can go to the office, I'll bring home the SILK board. > Well, due to usually using NFS the EtherAVB (and Ether too) driver is > probably alwaysbuilt in-kernel... Yes. I think so, too. Since it is necessary to reduce the Image size for embedded use, I found this problem when changing to a module and testing. > Trim your messages after your goodbye. That original message stuff > typically isn't tolerated in the Linux mailing lists, nearly the same as > top-posting... OK. Thanks. Thanks & Best Regards, Yuusuke Ashizuka <ashiduka@xxxxxxxxxxx>