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U-Boot SPI NOR support (sf layer) is quite outdated as it does not support 4 byte addressing opcodes, SFDP table parsing and different types of quad mode enable sequences.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@denx.de
Thanks, Stefan