Hi Stefan/Siva/Mugunthan/Vikas/Others On 15 February 2016 at 02:16, Jagan Teki <jt...@openedev.com> wrote: > Compared to previous patch series this series adds spi-nor > core with spi-nor controller drivers are of "mtd uclass" > > This is whole series for all spi-nor related changes, and while > series tested on spansion spi-nor chip. > > Know issue: > - arch/x86/lib/mrccache.c uses dm_spi_flash_ops, this need to fix. > > Why this framework: > > Some of the SPI device drivers at drivers/spi not a real > spi controllers, Unlike normal/generic SPI controllers they > operates only with SPI-NOR flash devices. these were technically > termed as SPI-NOR controllers, Ex: drivers/spi/fsl_qspi.c > > The problem with these were resides at drivers/spi is entire > SPI layer becomes SPI-NOR flash oriented which is absolutely > a wrong indication where SPI layer getting effected more with > flash operations - So this SPI-NOR core will resolve this issue > by separating all SPI-NOR flash operations from spi layer and > creats a generic layer called SPI-NOR core which can be used to > interact SPI-NOR to SPI driver interface layer and the SPI-NOR > controller driver. The idea is taken from Linux spi-nor framework. > > Before SPI-NOR: > > ----------------------- > cmd/sf.c > ----------------------- > spi_flash.c > ----------------------- > sf_probe.c > ----------------------- > spi-uclass > ----------------------- > spi drivers > ----------------------- > SPI NOR chip > ----------------------- > > After SPI-NOR: > > ------------------------------ > cmd/sf.c > ------------------------------ > spi-nor.c > ------------------------------- > m25p80.c spi nor drivers > ------------------------------- > spi-uclass SPI NOR chip > ------------------------------- > spi drivers > ------------------------------- > SPI NOR chip > ------------------------------- > > SPI-NOR with MTD: > > ------------------------------ > cmd/sf.c > ------------------------------ > MTD core > ------------------------------ > spi-nor.c > ------------------------------- > m25p80.c spi nor drivers > ------------------------------- > spi-uclass SPI NOR chip > ------------------------------- > spi drivers > ------------------------------- > SPI NOR chip > ------------------------------- > > drivers/mtd/spi-nor/spi-nor.c: spi-nor core > drivers/mtd/spi-nor/m25p80.c: mtd uclass driver > which is an interface layer b/w spi-nor core drivers/spi > drivers/mtd/spi-nor/fsl_qspi.c: spi-nor controller driver(mtd uclass) > > Changes for v6: > - Fixed git bisectable issues, with buildman. > - Fixed spi-nor compilation issues > - newly designed changes. > > Changes for v5: > - newly designed changes > > Testing: > $ git clone git://git.denx.de/u-boot-spi.git > $ cd u-boot-spi > $ git checkout -b spi-nor origin/spi-nor
Please test this series? thanks! -- Jagan. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
