[U-Boot] [PATCH 05/16] mtd: spi: Port SPI NOR framework from Linux

[Jagan Teki]

On Wed, Dec 12, 2018 at 11:10 PM Vignesh R <vigneshr at 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 Current U-Boot SPI NOR support (sf layer) is quite outdated as it does not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 at 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