I had ever soldered a samsung nand chip with two chip selects and then found that only half size was recognized. That means the second chip select pin is not activated.
2014-10-23 17:26 GMT+08:00 Vladimir Komendantskiy <[email protected]>: > Hi, > > Does anybody have several NAND flash chips working simultaneously with > either any of the (corrected) Allwinner block drivers or the MTD drivers? > I'm thinking to build a programming adaptor for 3 or 4 chips. I'd appreciate > if you let me know of your experiences with sunxi NAND controller chip > enable lines. > > I haven't found any support for my latest 16 nm Hynix chip in the git tree, > so I've added it by reverse-engineering on top of the Allwinner standalone > driver 2.12 (hex). In fact, the 2.12 driver, at least in the form I was able > to get, was still quite buggy even though it had less bugs compared to the > current driver in sunxi-3.4. > > Also I've added support for a very similar Hynix chip that I don't have but > which is featured in the A80 NAND flash binary blob. Both chips can work at > 50 MHz, which is faster than any currently supported Hynix chips. > > As a remark, the version 2.9 of the Allwinner driver in sunxi-3.4 doesn't > seem to work correctly with clean memory. It would need to be upgraded in > the main sunxi-linux tree. > > I would never buy an Allwinner tablet with a NAND flash: not after looking > in their driver code :) > > Thanks and regards, > --Vladimir > > -- > You received this message because you are subscribed to the Google Groups > "linux-sunxi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
