[PATCH v2] spi: cadence_qspi: Address the comparison failure for 0-8 bytes of data

[Jagan Teki]

On Sun, Jan 28, 2024 at 12:08 PM Tejas Bhumkar
<tejas.arvind.bhumkar at amd.com> wrote:
>
> The current implementation encounters issues when testing data ranging
> from 0 to 8 bytes. This was confirmed through testing with both ISSI
> (IS25WX256) and Micron (MT35XU02G) Flash exclusively in SDR mode.
>
> Upon investigation, it was observed that utilizing the
> "SPI_NOR_OCTAL_READ" flag and attempting to read less than 8 bytes in
> STIG mode results in a read failure, leading to a compare test failure.
>
> To resolve this issue, the CMD_4BYTE_FAST_READ opcode is now utilized
> instead of CMD_4BYTE_OCTAL_READ, specifically in SDR mode.
>
> This is based on patch series:
> https://lore.kernel.org/all/cover.1701853668.git.tejas.arvind.bhumkar@amd.com/
>
> Signed-off-by: Tejas Bhumkar <tejas.arvind.bhumkar at amd.com>
> ---

Applied to u-boot-spi/master