Disabling and enabling write protection

Is there a limit to the number of times write protection can be
disabled/enabled on a board, given that the hardware has been sufficiently
prepped? If I use flashrom to disable write protection on a board, then do
nothing, then enable write protection again, there shouldn't be any reason
I can't just disable write protection again later, correct?

[David Hendricks]

On Tue, Mar 25, 2014 at 3:39 PM, <
[e-mail]> wrote:
> Is there a limit to the number of times write protection can be
> disabled/enabled on a board, given that the hardware has been sufficiently
> prepped?

I don't think there is a practical limit. The flash memory itself usually
has maximum durability of 10's or 100's of thousands of erase/write cycles.
I am not entirely sure about the status register where write protect info
is stored, though.
> If I use flashrom to disable write protection on a board, then do
> nothing, then enable write protection again, there shouldn't be any reason
> I can't just disable write protection again later, correct?

Correct, assuming you do not make changes to the hardware. If /WP is
asserted when the write-protect enable bit is set in the status register,
then write-protection will be re-enabled. Then you will need to de-assert
/WP before clearing the enable bit.