RE: [PATCH linux-next 0/5] mtd: spi-nor: add driver for Atmel QSPI controller

[Bean Huo 霍斌斌 (beanhuo)]

> 
> I'll admit I'm a little fuzzy on the differences between dual and quad modes on
> various flash manufacturers. Can you help clear it up for me?

For SPI NOR, currently, don't have an official standard to define an uniform Quad
I/O mode protocol. So we can see that there are some difference between Flash
Vendor.