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Subject[PATCH v4 0/7] mtd: spi-nor: add xSPI Octal DTR support

JESD216C has defined specification for Octal 8S-8S-8S and 8D-8D-8D.
Based on JEDEC216C Basic Flash Parameter Table (BFPT) driver extract
DWORD-18: command and command extension type.
DWORD-20: Maximum operation speed of device in Octal mode.

xSPI profile 1.0 table:
DWORD-1: Read Fast command, the number of dummy cycles and address nbytes
for Read Status Register command.
DWORD-2: Read/Write volatile Register command for CFG Reg2.
DWORD-4 and DWORD-5: dummy cycles used for various frequencies based on
maximum speed of device from BFPT 20th DWORD.

Ccommand sequences to change to octal DTR mode:
The length of each command sequence is 8 per byte for single SPI mode and
patching driver to parse and execute these sequences for octal DTR mode.

By Vignesh's comments, this patches set is dependency on Pratyush's
[1][2][5][7][8] and [10][12].

Tested on Macronix's Zynq PicoZed board with Macronix's SPI controller
(spi-mxic.c) driver patched on mx25uw51245g Octal flash.


Summary of change log
Removed Pratyush's patches set part.

Add support command sequences to change octal DTR mode and based on
part of Pratyush's patches set.

Parse BFPT & xSPI table for Octal 8D-8D-8D mode parameters and enable Octal
mode in spi_nor_late_init_params().
Using Macros in spi_nor_spimem_read_data, spi_nor_spimem_write_data and
so on by Vignesh comments.

Without parsing BFPT & xSPI profile 1.0 table and enter Octal 8D-8D-8D
mode directly in spi_nor_fixups hooks.

thnaks for your time and review.
best regards,

Mason Yang (7):
mtd: spi-nor: sfdp: get octal mode maximum speed from BFPT
mtd: spi-nor: sfdp: parse xSPI Profile 1.0 table
mtd: spi-nor: sfdp: parse command sequences to change octal DTR mode
mtd: spi-nor: core: add configuration register 2 read & write support
mtd: spi-nor: core: execute command sequences to change octal DTR mode
spi: mxic: patch for octal DTR mode support
mtd: spi-nor: macronix: Add Octal 8D-8D-8D supports for Macronix

drivers/mtd/spi-nor/core.c | 151 ++++++++++++++++++++++++-
drivers/mtd/spi-nor/core.h | 41 +++++++
drivers/mtd/spi-nor/macronix.c | 55 +++++++++
drivers/mtd/spi-nor/sfdp.c | 246 +++++++++++++++++++++++++++++++++++++++++
drivers/mtd/spi-nor/sfdp.h | 4 +
drivers/spi/spi-mxic.c | 98 ++++++++++------
6 files changed, 562 insertions(+), 33 deletions(-)


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