[U-Boot] [PATCH v5 00/32] mtd: Add SPI-NOR core support

[Jagan Teki]

Compared to previous patch series this series adds spi-nor
core with spi-nor controller drivers are of "mtd uclass"

Why this framework:

Some of the SPI device drivers at drivers/spi not a real
spi controllers, Unlike normal/generic SPI controllers they
operates only with SPI-NOR flash devices. these were technically
termed as SPI-NOR controllers, Ex: drivers/spi/fsl_qspi.c

The problem with these were resides at drivers/spi is entire
SPI layer becomes SPI-NOR flash oriented which is absolutely
a wrong indication where SPI layer getting effected more with
flash operations - So this SPI-NOR core will resolve this issue
by separating all SPI-NOR flash operations from spi layer and
creats a generic layer called SPI-NOR core which can be used to
interact SPI-NOR to SPI driver interface layer and the SPI-NOR
controller driver. The idea is taken from Linux spi-nor framework.

Before SPI-NOR:

-----------------------
	cmd/sf.c
-----------------------
	spi_flash.c
-----------------------
	sf_probe.c
-----------------------
	spi-uclass
-----------------------
	spi drivers
-----------------------
	SPI NOR chip
-----------------------

After SPI-NOR:

------------------------------
	cmd/sf.c
------------------------------
	spi-nor.c
-------------------------------
m25p80.c	spi nor drivers
-------------------------------
spi-uclass	SPI NOR chip
-------------------------------
spi drivers
-------------------------------
SPI NOR chip
-------------------------------

SPI-NOR with MTD:

------------------------------
	cmd/sf.c
------------------------------
	MTD core
------------------------------
	spi-nor.c
-------------------------------
m25p80.c	spi nor drivers
-------------------------------
spi-uclass	SPI NOR chip
-------------------------------
spi drivers
-------------------------------
SPI NOR chip
-------------------------------

drivers/mtd/spi-nor/spi-nor.c: spi-nor core
drivers/mtd/spi-nor/m25p80.c: mtd uclass driver
which is an interface layer b/w spi-nor core drivers/spi
drivers/mtd/spi-nor/fsl_qspi.c: spi-nor controller driver(mtd uclass)

Changes for v5:
- newly designed changes

Testing:
$ git clone git://git.denx.de/u-boot-spi.git
$ cd u-boot-spi
$ git checkout -b spi-nor origin/spi-nor

Jagan Teki (32):
  mtd: Add m25p80 driver
  mtd: Add Kconfig entry for MTD_M25P80
  mtd: Add SPI-NOR core support
  doc: device-tree-bindings: jedec,spi-nor
  mtd: spi-nor: Add Kconfig entry for MTD_SPI_NOR
  mtd: spi-nor: Add kconfig for MTD_SPI_NOR_USE_4K_SECTORS
  mtd: spi-nor: Add MTD support
  mtd: spi-nor: Add spi_nor support in m25p80
  mtd: spi-nor: Add dm spi-nor probing
  mtd: spi-nor: Add spi_flash_probe for mtd-dm-spi-nor
  cmd: sf: Add mtd_info for mtd-dm-spi-nor code
  mtd: spi-nor: m25p80: Add spi_nor support for non-dm
  spi_flash: Use mtd_info operation for non-dm
  mtd: spi-nor: Move spi_read_then_write to spi layer
  spi: Rename spi_read_then_write to spi_write_then_read
  spi: Drop mode_rx
  spi: Drop SPI_RX_FAST
  mtd: spi-nor: Rename SPI_FLASH_BAR to SPI_NOR_BAR
  mtd: spi-nor: Add Kconfig entry for SPI_NOR_BAR
  mtd: spi-nor: Copy spl files from drivers/mtd/spi
  mtd: spi-nor: spl: Follow ascending order of include headers
  mtd: spi-nor: fsl_espi_spl: Use mtd_info
  mtd: spi-nor: spi_spl_load: Use mtd_info
  mtd: spi-nor: Add flash vendor Kconfig entries
  arm: zynq: Kconfig: Select MTD uclass
  arm: zynq: Kconfig: Drop DM_SPI_FLASH
  defconfigs: zynq_microzed: Drop CONFIG_SPI_FLASH
  defconfig: zynq_microzed: Enable CONFIG_MTD_M25P80
  defconfig: zynq_microzed: Enable CONFIG_MTD_SPI_NOR
  spl: Add CONFIG_SPL_SPI_NOR_SUPPORT
  configs: zynq: Use CONFIG_SPL_SPI_NOR_SUPPORT
  configs: zynq: Use CONFIG_SPL_MTD_SUPPORT

 Makefile                                       |    1 +
 arch/arm/Kconfig                               |    2 +-
 cmd/sf.c                                       |   38 +-
 configs/zynq_microzed_defconfig                |    3 +-
 doc/device-tree-bindings/mtd/jedec,spi-nor.txt |   78 ++
 drivers/Makefile                               |    1 +
 drivers/mtd/Kconfig                            |    2 +
 drivers/mtd/spi-nor/Kconfig                    |   99 ++
 drivers/mtd/spi-nor/Makefile                   |   18 +
 drivers/mtd/spi-nor/fsl_espi_spl.c             |   90 ++
 drivers/mtd/spi-nor/m25p80.c                   |  332 +++++++
 drivers/mtd/spi-nor/spi-nor-ids.c              |  276 ++++++
 drivers/mtd/spi-nor/spi-nor-probe.c            |   45 +
 drivers/mtd/spi-nor/spi-nor.c                  | 1141 ++++++++++++++++++++++++
 drivers/mtd/spi-nor/spi_spl_load.c             |   89 ++
 drivers/spi/ich.c                              |    6 +-
 drivers/spi/spi-uclass.c                       |   35 +-
 drivers/spi/spi.c                              |   24 +
 drivers/spi/ti_qspi.c                          |    6 +-
 include/configs/zynq-common.h                  |    3 +-
 include/linux/err.h                            |    5 +
 include/linux/mtd/spi-nor.h                    |  251 ++++++
 include/spi.h                                  |   33 +-
 include/spi_flash.h                            |   79 +-
 24 files changed, 2581 insertions(+), 76 deletions(-)
 create mode 100644 doc/device-tree-bindings/mtd/jedec,spi-nor.txt
 create mode 100644 drivers/mtd/spi-nor/Kconfig
 create mode 100644 drivers/mtd/spi-nor/Makefile
 create mode 100644 drivers/mtd/spi-nor/fsl_espi_spl.c
 create mode 100644 drivers/mtd/spi-nor/m25p80.c
 create mode 100644 drivers/mtd/spi-nor/spi-nor-ids.c
 create mode 100644 drivers/mtd/spi-nor/spi-nor-probe.c
 create mode 100644 drivers/mtd/spi-nor/spi-nor.c
 create mode 100644 drivers/mtd/spi-nor/spi_spl_load.c
 create mode 100644 include/linux/mtd/spi-nor.h

-- 
1.9.1