Le 21/12/2016 à 17:57, Cédric Le Goater a écrit :
> Hello,
>
> Here is a series introducing a new driver for the different memory
> controllers of the Aspeed AST2500 and AST2400 SoCs. Each SoC has at
> least a memory controller for the BMC firmware and another one for the
> host firmware. The register set are mostly compatible but there are
> some slight differences on the AST2400.
>
> The driver only supports SPI type flash.
>
> Tested on:
>
> * OpenPOWER Palmetto (AST2400) with
> FMC controller : n25q256a
> SPI controller : mx25l25635e and n25q512ax3
>
> * Evaluation board (AST2500) with
> FMC controller : w25q256
> SPI controller : w25q256
>
> * OpenPOWER Witherspoon (AST2500) with
> FMC controller : mx25l25635e * 2
> SPI controller : mx66l1g45g
>
> Changes since v4:
> - improved IO routines with Cyrille's suggestions
> - added dummy bytes hanling for fast read commands
> - removed the 'label' property from jedec,spi-nor. Needs more
> discussion.
>
> Changes since v3:
> - reworked IO routines to use io{read,write}32_rep
> - changed config option to SPI_ASPEED_SMC
> - fixed aspeed_smc_chip_setup_init() returned value
>
> Changes since v2:
> - splitted patch to distinguish AST2400 and AST2500 controllers
> - fixed controller names
> - introduced prepare/unprepare ops
> - introduced a aspeed_smc_setup_flash() routine
> - various cleanups
>
> Changes since v1:
> - added a set4b ops to handle difference in the controllers
> - simplified the IO routines
> - prepared for fast read using dummy cycles
>
> Work in progress:
> - read optimization using higher SPI clock frequencies
> - command mode to direct reads from AHB
> - DMA support
>
> Thanks,
>
> C.
>
> Cédric Le Goater (3):
> mtd: spi-nor: add memory controllers for the Aspeed AST2500 SoC
> mtd: aspeed: add memory controllers for the Aspeed AST2400 SoC
> mtd: spi-nor: bindings for the Aspeed memory controllers
>
> .../devicetree/bindings/mtd/aspeed-smc.txt | 51 ++
> drivers/mtd/spi-nor/Kconfig | 10 +
> drivers/mtd/spi-nor/Makefile | 1 +
> drivers/mtd/spi-nor/aspeed-smc.c | 759 +++++++++++++++++++++
> 4 files changed, 821 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mtd/aspeed-smc.txt
> create mode 100644 drivers/mtd/spi-nor/aspeed-smc.c
>
Applied to git://github.com/spi-nor/linux.git
Thanks!
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