Hi Yifeng, 赵仪峰 <yifeng.zhao@xxxxxxxxxxxxxx> wrote on Mon, 2 Nov 2020 16:14:01 +0800: > Hi Miquel, > > The nand_base.c will call nand_deselect_target after NAND read/program... ops done, and set variable chip->cur_cs = -1, > but the nand controller do nothing and the cs of the NAND device is still selected, > so the NAND device will not enter auto power save mode. Yes, I need to think about it again. What I am saying is that this has *nothing* to do with the controller driver your are trying to merge. Please focus on the bare features. Once these will be merged, it will be easier to propose changes on top of it to bring more fine grained features. It's v13 already, please focus on the controller's basic features, implement them correctly and in a second time we'll think about the power consumption, what do you think? Thanks, Miquèl