Jean Delvare wrote: > Hi David, > > On Thu, 21 Aug 2008 02:43:22 -0700 (PDT), David Miller wrote: > >> i2c-pcf: Add adapter hooks around xfer begin and end. >> >> Some I2C bus implementations need to synchronize with external >> entities, such as system firmware, which might also be programming the >> same I2C bus. >> >> In order to facilitate this add ->xfer_begin() and ->xfer_end() hooks >> which are invoked around pcf_xfer(). >> > > I get the idea, but I'm not sure about the implementation. I had a > request several months ago for something similar for the i2c-algo-bit > driver. I don't think we want to duplicate this mechanism in every > i2c-algo driver, so it would probably make sense to implement it > at the i2c-core level? > > Michael, do you still need this for i2c-algo-bit? We did not discuss > this again recently, so I admit I don't know what is the status of this > request.
Jean, Yes, the problem still exists, and I still need a way to lock the i2c adapter during certain volitile operations at driver start-up. Right now I have an artificial delay in place as a workaround, but that's only because there currently is no other choice. Basically, I have a single piece of silicon that is capable of bringing down the entire i2c bus if somebody attempts to communicate with any other IC during initialization of this silicon. Regards, Mike _______________________________________________ i2c mailing list i2c@lm-sensors.org http://lists.lm-sensors.org/mailman/listinfo/i2c
