On Wed, Oct 18, 2017 at 09:43:07AM +0200, Wolfram Sang wrote: > > > <halfknowledge> Isn't the at91 i2c hardware broken or unreliable such > > that it's usually recommended to stick to i2c-gpio? If so maybe the same > > I thought later versions have been fixed? (half knowledge, too) > > > applies to client mode and someone should better extend i2c-gpio to > > handle the slave API? > > I wouldn't like that much. It means polling the GPIOs to scan the I2C > bus for the communication of the master. GPIOs changing its level can trigger an irq, so the hardware does the job of polling for you. This doesn't necessarily makes this a good idea, but it's not as bad as it could be. > That is timing-critical and does not like latency. Might even depend > on the RT patchset ;) If the bus is operated slow enough it could work. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |
