[U-Boot] [PATCH v4] cfi flash: add status polling method for amd flash

[Wolfgang Denk]

Dear Thomas Chou,

In message <1269397761-23394-1-git-send-email-thomas at wytron.com.tw> you wrote:
> This patch adds status polling method to offer an alternative to
> data toggle method for amd flash chips.
> 
> This patch is needed for nios2 cfi flash interface, where the bus
> controller performs 4 bytes read cycles for a single byte read
> instruction. The data toggle method can not detect chip busy
> status correctly. So we have to poll DQ7, which will be inverted
> when the chip is busy.
> 
> This feature is enabled with the config def,
> CONFIG_SYS_CFI_FLASH_STATUS_POLL
> 
> In flash_erase, the verbose printing of '.' is changed that it will
> go with each sector whether successed or failed.

Please split this part off into a separate patch. This is a global
change to the user interface and must be discussed separately.

Best regards,

Wolfgang Denk

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