Hi Ludovic, ludovic.desroches wrote on Monday, August 27, 2012 12:25 PM: > Le 11/08/2011 12:11 PM, Nikolaus Voss a écrit : >> The G45 datasheets explicitly states that setting the open drain property >> on peripheral function gpios is not allowed. (How about other A91 chips?) > > Did you remove open drain because you had some issues or because you > had seen it into datasheet? > > I tried with and without open drain. The behavior was the same. Looking > to the G45 datasheet, I didn't see that the open drain property is not > allowed on peripheral function gpios: > > 'The Multi Drive can be selected whether the I/O line > is controlled by the PIO controller or assigned to a peripheral function.' > > The datasheet should have been updated or there is another place where > it is mentioned that open drain property is not allowed in this case. well, it didn't work on my G45. I found the following note in the TWI chapter 31.6.1 of the G45 datasheet: "The user must not program TWD and TWCK as open-drain. It is already done by the hardware." After removing the open-drain setting, it worked. Regards, Nikolaus -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
