[U-Boot] [PATCH v2 00/11] SF: Migrate to Linux SPI NOR framework

[Stefan Roese]

Hi Vignesh,

On 21.12.18 07:38, Vignesh R wrote:
> U-Boot SPI NOR support (sf layer) is quite outdated as it does not
> support 4 byte addressing opcodes, SFDP table parsing and different types of
> quad mode enable sequences. Many newer flashes no longer support BANK
> registers used by sf layer to a access >16MB space.
> Also, many SPI controllers have special MMIO interfaces which provide
> accelerated read/write access but require knowledge of flash parameters
> to make use of it. Recent spi-mem layer provides a way to support such
> flashes but sf layer isn't using that.
> This patch series syncs SPI NOR framework from Linux v4.19. It also adds
> spi-mem support on top.
> So, we gain 4byte addressing support and SFDP support. This makes
> migrating to U-Boot MTD framework easier.
> 
> Tested with few Spansion, micron and macronix flashes with TI's dra7xx,
> k2g, am43xx EVMs. I dont have access to flashes from other vendors. So,
> I would greatly appreciate testing on other platforms. Complete series
> with dependencies here[1]
> 
> For clean build on some platforms, depends on CONFIG_SPI_FLASH migration
> to defconfigs [2]
> 
> [1] https://github.com/r-vignesh/u-boot.git  branch: spi-nor-mig-patch-v2
> [2] https://patchwork.ozlabs.org/patch/1007485/
> 
> Simon, Stefan, Thanks for testing previous versions.
> I haven't carried Tested-by's here as I have added back SPI_FLASH_BAR
> support (but isn't enabled by default). Would be great if you could
> retest this series.
> I am hoping there won't be any major rework/changes after this round.

I just tested this new patchset on my LinkIt Smart 7688 board with the
4-byte strapped SPI NOR mx25l25635e device and it works without any
issues. So feel free to add my T-b tag to this series:

Tested-by: Stefan Roese <sr at denx.de>

Thanks,
Stefan