[U-Boot] Spansion QSPI S70FL01GS Support

[Lorenzo Adani]

Hi,

I'm using a QSPI S70FL01GS (128MB) connected to a CycloneV. In the Qsys 
I set two chipselect pins for accessing QSPI, then I recompiled the 
whole project and
the U-Boot.

When I issue the command 'sf probe' U-Boot returns:
SF: Detected s25fl512s with page size 256 Bytes, erase size 256 KiB, 
total 64 MiB

It's partially true since the QSPI chip is a stack of two S25FL512S 
(64MB) memories. If I try to access beyond 0x3FFFFFF I got the following 
error message:
Offset exceeds device limit
sf - SPI flash sub-system

The part I'm using seems not to be supported inside the U-Boot source code.
I tried the following U-Boot repos:
- https://github.com/altera-opensource/u-boot-socfpga
- https://github.com/u-boot/u-boot.git

I compiled U-Boot for booting from SD card but I didn't change anything 
else with respect of the defconfig configuration because at the moment 
my main issue
is to access the second memory chip.

Is there somewhere a patch for enabling such a QSPI? Can anyone help me?

Thank you in advance


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