[U-Boot] [RFC PATCH v2 00/11] SF: Migrate to Linux SPI NOR framework

Simon Goldschmidt
2018-12-04T20:11:53Z

Am 04.12.2018 um 13:55 schrieb Boris Brezillon:
> On Tue, 4 Dec 2018 17:56:48 +0530
> Vignesh R <vigneshr@ti.com> wrote:
>
>> U-Boot SPI NOR support (sf layer) is quite outdated as it does not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.
>> 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 easier.
>
> Glad to see that happen sooner than I had expected. Looks like the
> patch series is in a good shape already, and I'm happy to see the
> u-boot spi-nor layer being based on the Linux one.
>
> Good job, and thanks again for working on that!

Right, I do appreciate this!

I did some compilation tests first and I'm happy to say that with the
SPL_SPI_FLASH_TINY option enabled, my SPL is about 1900 byte smaller
than before :-)

However, my socfpga socrates board does not boot. I'll have to
investigate why. I just applied this series and compiled for
socfpga_socrates_defconfig. Is there anything else I should have changed
to make it work?

Regards,
Simon