[U-Boot] [u-boot-release] [PATCH 2/2][v5] nxp/ls2080ardb: Add QSPI-boot support

[York Sun]

On 04/27/2017 09:34 PM, Priyanka Jain wrote:
>
>
>> -----Original Message-----
>> From: York Sun [mailto:york.sun at nxp.com]
>> Sent: Thursday, April 27, 2017 10:25 PM
>> To: Priyanka Jain <priyanka.jain at nxp.com>; u-boot at lists.denx.de
>> Cc: Suresh Gupta <suresh.gupta at nxp.com>
>> Subject: Re: [u-boot-release] [PATCH 2/2][v5] nxp/ls2080ardb: Add QSPI-boot
>> support
>>
>> On 04/26/2017 09:56 PM, Priyanka Jain wrote:
>>
>> <snip>
>>
>>>>
>>>> Priyanka,
>>>>
>>>> I understand you don't have access to CPLD. Do you still have access
>>>> to IFC NOR flash? Can you boot from NOR flash, and issue a cpld
>>>> command to reboot from QSPI?
>>>>
>>>> York
>>> No, NOR and QSPI are muxed at RCW level. So, IFC is disabled for QSPI-boot.
>>> We use QSPI emulator on board or code-warrior to write to on-board QSPI
>> flash.
>>>
>>> Also, for LS2088ARDB, we only have single QSPI flash. So no alternate bank.
>>>
>>
>> What if the user brick the board by trashing QSPI flash? Is JTAG tool the only way
>> to recover? Can QSPI be accessed by booting from other sources?
>>
>> The single bank QSPI will be a disaster if we cannot recover a bricked board.
>>
>> York
> QSPI can be accessed also by attaching QSPI emulator device on boards.
> This issue has been resolved in another similar platform LS2081ARDB which has dual QSPI flash.
> Priyanka
>

Let's say a customer has this board without QSPI emulator, or CW Tap, is 
there any way to program QSPI flash if it is bricked?

You have another patch to enable SD for this board. Can this board boot 
from SD and access QSPI?

York