Hi Joakim, On Thu, Mar 18, 2021 at 8:04 AM Joakim Zhang <qiangqing.zhang@xxxxxxx> wrote: > Hi Shawn, > > Seems you prefer to 2, is it possible to buildin Realtek PHY(CONFIG_REALTEK_PHY=y)? If not, it is going to be tricky. Yes, we should select the driver as built-in and describe the reset timing requirements as per the datasheet. I have just sent two patches to address the issue you reported. Please test them.