[U-Boot] [PATCH 0/7] qspi controller: Normal, quad and memory mapped read support

[Sourav Poddar]

This patch series add uboot ti qspi controller driver.

QSPI is a kind of spi module that allows single,
dual and quad read access to external spi devices. The module
has a memory mapped interface which provide direct interface
for accessing data form external spi devices.

SPI mode
-------
SPI mode uses mtd spi framework for transfer and reception of data.
Can be used in:
1. Normal mode: use single pin for transfers
2. Dual Mode: use two pins for transfers.
3. Quad mode: use four pin for transfer

Memory mapped read mode
-----------------------
In this, SPI controller is configured using configuration port and then
controler is switched to memory mapped port for data read.

Series proposed suport for quad read as well as memory mapped read 
in spi mtd frameowrk as well as ti qpsi driver.

Matt Porter (3):
  omap5: add qspi support
  spi: add TI QSPI driver
  dra7xx_evm: add SPL API, QSPI, and serial flash support

Ravikumar Kattekola (1):
  drivers: mtd: qspi: Add quad read support

Sourav Poddar (3):
  drivers: mtd: spi: Modify read/write command for sfl256s flash.
  driver: spi: Add memory mapped read support
  README: qspi usecase and testing documentation.

 arch/arm/cpu/armv7/omap5/hw_data.c     |    7 +-
 arch/arm/cpu/armv7/omap5/prcm-regs.c   |    1 +
 arch/arm/include/asm/arch-omap5/omap.h |    3 +
 arch/arm/include/asm/arch-omap5/spl.h  |    1 +
 arch/arm/include/asm/omap_common.h     |    1 +
 board/ti/dra7xx/mux_data.h             |   10 +
 doc/README.ti_qspi_dra_test            |   38 ++++
 doc/README.ti_qspi_flash               |   47 +++++
 drivers/mtd/spi/spansion.c             |    1 +
 drivers/mtd/spi/spi_flash.c            |  177 +++++++++++++++++-
 drivers/mtd/spi/spi_flash_internal.h   |    2 +
 drivers/spi/Makefile                   |    1 +
 drivers/spi/ti_qspi.c                  |  327 ++++++++++++++++++++++++++++++++
 include/configs/dra7xx_evm.h           |   24 +++
 include/spi.h                          |    5 +
 15 files changed, 640 insertions(+), 5 deletions(-)
 create mode 100644 doc/README.ti_qspi_dra_test
 create mode 100644 doc/README.ti_qspi_flash
 create mode 100644 drivers/spi/ti_qspi.c