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

[Prabhakar Kushwaha]

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(-)

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2.7.4