[U-Boot] [PATCH] fsl: verify writes to the MAC address EEPROM

[Wolfgang Denk]

Dear Timur Tabi,

In message <4C57336E.7050704 at freescale.com> you wrote:
> Wolfgang Denk wrote:
> > Why is this i2c_read() needed or actually useful? Should the error
> > return code from the i2c_write() above not be sufficient indication
> > that the writing failed?  If that was the case, then some other parts
> > of the code need fixing.
> 
> That's just the way the EEPROM chip works.  When it's set into write-protect
> mode, it cheerfully accepts all of the I2C write commands, and acknowledges
> them appropriately, but it doesn't actually store the data into the EEPROM.
>  The read-back is the only way I've found to verify that the write has
> actually occurred.

Is it correct to assume the the WP signal is connected to some GPIO
pin which can be set / unset in software?

Best regards,

Wolfgang Denk

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