[U-Boot] [RFC 0/5] sf: Update spi-nor framework

[Yang, Wenyou]

Hi,

On this topic, Cyrille has a patches here, as a reference.

https://lists.denx.de/pipermail/u-boot/2017-July/299409.html

On 2017/12/11 13:57, Prabhakar Kushwaha wrote:
> SPI-NOR framework currently supports-
>   - (1-1-1, 1-1-2, 1-1-4) read protocols
>   - read latency(dummy bytes) are hardcoded with the assumption
>   that the flash would support it.
>   - No support of mode bits.
>   - No support of flash size above 128Mib
>
> This patch set add support of 1-2-2, 1-4-4 read protocols.
> It ports Linux commits "mtd: spi-nor: add a stateless method to support
> memory size above 128Mib" and "mtd: spi-nor: parse Serial Flash
> Discoverable Parameters (SFDP) tables". It enables 4byte address opcode
> and run time flash parameters discovery including dummy cycle and mode
> cycle.
>
> Finally it update fsl-quadspi driver to store(set_mode) spi bus mode and
> provision for run-time LUTs creation.
>
> Note: This patch-set is only **compliation** tested. Sending RFC to get
> early feed-back on the approach.
>
> Prabhakar Kushwaha (5):
>    sf: Add support of 1-2-2, 1-4-4 IO READ protocols
>    sf: add method to support memory size above 128Mib
>    sf: parse Serial Flash Discoverable Parameters (SFDP) tables
>    sf: fsl_qspi: Add support of fsl_qspi_set_mode
>    sf: fsl_quadspi: Configue LUT based on padding information
>
>   drivers/mtd/spi/sf_internal.h   | 230 +++++++++++++++-
>   drivers/mtd/spi/spi_flash.c     | 574 +++++++++++++++++++++++++++++++++++++++-
>   drivers/spi/fsl_qspi.c          |  85 +++++-
>   include/spi_flash.h             |   2 +
>   5 files changed, 875 insertions(+), 18 deletions(-)
>