ack/nack in write operation

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Hello everybody,
I'm new to i2c development some don't kill me if my questions are stupid!!

I'm using bitbanging i2c driver for an AT91 devices,
the AT91 is master and I have a slave that reply, during a write, with a NAK after last byte.
The i2c specification permit this solution but i2c linux driver no.
(i have see the possibility to set the I2C_M_IGNORE_NAK but ignore all NAK and isn't right!)

There is a solution or I have to modify the code?

Thank you
Michele

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