On Wed, Dec 12, 2018 at 11:10 PM Vignesh R vigneshr@ti.com wrote:
Current U-Boot SPI NOR support (sf layer) is quite outdated as it does not support 4 byte addressing opcodes, SFDP table parsing and different types of quad mode enable sequences. Many newer flashes no longer support BANK registers used 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 isn't using that. So sync SPI NOR framework from Linux v4.19 and add spi-mem support on top. in order to gain 4 byte addressing support, SFDP support and a way to support SPI controllers with MMIO flash interface.
Signed-off-by: Vignesh R vigneshr@ti.com
drivers/mtd/spi/spi-nor-core.c | 2647 ++++++++++++++++++++++++++++++++ include/linux/mtd/cfi.h | 32 + include/linux/mtd/spi-nor.h | 421 +++++
Please refer many mails about this comment. I don't look for carbon copy of the code from Linux, you can use the implementation and even macro names etc but the end code would be the code that require U-Boot.
- no __UBOOT ifdef - file names in u-boot should have _ other than few uclass drivers