[U-Boot] [PATCH] mtd: cfi_flash: fix polling for bit XSR.7 on Intel chips

[Stefan Roese]

Hi Daniel,

On 18.07.2016 14:10, Daniel Schwierzeck wrote:
> flash_full_status_check() checks bit XSR.7 on Intel chips. This
> should be done by only checking bit 7 and not by comparing the
> whole status byte or word with 0x80.
>
> This fixes the non-working block erase in the pflash emulation
> of Qemu when used with the MIPS Malta board. MIPS Malta uses x32
> mode to access the pflash device. In x32 mode Qemu mirrors the
> lower 16 bits of the status word into the upper 16 bits. Thus
> the CFI driver gets a status word of 0x8080 in x32 mode. If
> flash_full_status_check() uses flash_isequal(), then it polls for
> XSR.7 by comparing 0x8080 with 0x80 which never becomes true.
>
> Reported-by: Alon Bar-Lev <alon.barlev at gmail.com>
> Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>

Applied to u-boot-cfi-flash/master.

Thanks,
Stefan