> Sorry for the long delay. I tried to analyze the issue. Attached patch works > on AC100 (Misha Komarovsky helped me with testing). > > Wolfram could you please try the patch with your environment? No change, sadly. I don't get slave interrupts. > Init function is called multuple times. If I2C controller works > in slave mode, then driver must keep slave registers otherwise > slave configuration will be reseted. This patch does not tackle the main issue, though. There should not be a "slave mode" for the controller. It can be a master and slave simultaneously and should do the right thing depending on what's happening on the bus. The Tegra2 manual I have says "The Master can address the internal slave (for basic testing) or an external 7-bit or 10-bit addressed Slave device." So even a loopback should be possible (if we trust the manual ;)).
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