[U-Boot] [PATCH] arm: at91: gardena-smart-gateway-at91sam: Enable CONFIG_SYS_NAND_USE_FLASH_BBT

[Stefan Roese]

Hi Alex,

On 13.09.19 15:09, Alexander Dahl wrote:
> Am Dienstag, 27. August 2019, 08:14:50 CEST schrieb Stefan Roese:
>> This patch enables the BBT in NAND on the AT91SAM based GARDENA smart
>> Gateway. This is especially important, since the Linux driver also
>> enables this option and uses the BBT table pages. Without setting this
>> option, U-Boot will try to re-use these pages again (e.g. UBI).
> 
> Does the Linux kernel driver use those unconditionally or is that a kernel
> config option? Which one? (Search in 5.2 kernel config for BBT is
> inconclusive.)

Linux uses the DT property "nand-on-flash-bbt" for this decision.
But please be aware - this is only for raw NAND and not SPI NAND
(IIRC).

And yes, we should definitely move to this DT property instead of
the Kconfig symbol in U-Boot as well. To automatically match the
configuration of such boards in U-Boot and Linux. But such a change
it too intrusive at this time of release cycle.

Thanks,
Stefan