On 28.11.2018 18:26, Vignesh R wrote:
U-Boot SPI NOR support (sf layer) is quite outdated as it does not
support 4 byte addressing opcodes, SFDP table and different types of
quad mode enable sequences. Many newer flashes no longer support BANK
registers use by sf layer to a access >16MB space.
Also, many SPI controllers have special MMIO interfaces which provide
accelerated read/write access but require knowledge of flash parameters
to make use of it. Recent spi-mem layer provides a way to support such
flashes but sf layer isnt using that.
This patch series syncs SPI NOR framework from Linux v4.19. It also adds
spi-mem support on top.
So, we gain 4byte addressing support and SFDP support. This makes
migrating to U-Boot MTD framework very easy.
Tested with few Spansion, micron and macronix flashes with TI's dra7xx,
k2g, am43xx EVMs. I dont have access to flashes from other vendors. So,
I would greatly appreciate testing on other platforms.
This is a RFC, if this approach if fine with the community and get an
early feedback. Based on the response, I plan to post
official series with better splitting of patches, removing all dead code
and fixing up any checkpatch errors.
[1] https://github.com/r-vignesh/u-boot.git branch: spi-nor-mig
Vignesh R (6):
mtd: spi: Port SPI NOR framework from Linux
Patch 1/6 seems to be missing for me and in patchwork...
Regards,
Simon
mtd spi: Switch to new SPI NOR framework
spi: spi-mem: Enable all SPI modes
porter_defconfig: Enable tiny printf
da8250_am18xxevm_defconfig: Enable TINY PRINTF
mtd: spi: Remove unused files
arch/sh/include/asm/bitops.h | 4 +
common/spl/Kconfig | 7 +
configs/da850_am18xxevm_defconfig | 1 +
configs/porter_defconfig | 1 +
drivers/mtd/spi/Kconfig | 8 +
drivers/mtd/spi/Makefile | 4 +-
drivers/mtd/spi/sandbox.c | 36 +-
drivers/mtd/spi/sf_dataflash.c | 11 +-
drivers/mtd/spi/sf_internal.h | 227 +--
drivers/mtd/spi/sf_probe.c | 33 +-
drivers/mtd/spi/spi-nor.c | 2859 +++++++++++++++++++++++++++++
drivers/mtd/spi/spi_flash.c | 1337 --------------
drivers/mtd/spi/spi_flash_ids.c | 211 ---
drivers/spi/spi-mem.c | 15 +-
drivers/spi/stm32_qspi.c | 4 +-
include/linux/mtd/cfi.h | 385 ++++
include/linux/mtd/mtd.h | 2 +-
include/linux/mtd/spi-nor.h | 421 +++++
include/spi_flash.h | 105 +-
19 files changed, 3805 insertions(+), 1866 deletions(-)
create mode 100644 drivers/mtd/spi/spi-nor.c
delete mode 100644 drivers/mtd/spi/spi_flash.c
delete mode 100644 drivers/mtd/spi/spi_flash_ids.c
create mode 100644 include/linux/mtd/cfi.h
create mode 100644 include/linux/mtd/spi-nor.h
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