Jean Delvare said the following: > Hallo Michael, > > On Tue, 14 Apr 2009 09:41:50 +0200, Michael Lawnick wrote: >> on update to kernel to 2.6.29 I've run into the issue that I2C >> adapter's class attribute in struct i2c_adapter wasn't set and so >> no client driver could be loaded. Currently I initialize .class in >> the struct declaration part, but this is main code for all boards >> that use this adapter :-( I'm now searching for a place where to do >> it in a board specific way like device tree. Any suggestions? > > Which architecture is this, which bus driver? We are based on PowerPC MPC8548, adapter code is i2c-mpc.c We use the adapter compiled-in. > I think I would pass the class value as platform data to the i2c bus > driver, and in this driver copy the value from platform data to > struct i2c_adapter. > Hmm, I'm not sure whether I really understand you. You propose modification of C-code that is part of board unspecific source tree, correct? IMHO, as this is a board specific parameter, there should be a way to do it in something like a config file. Probably in Kconfig (if this is possible at all) or device tree or ...? An alternative could be a writable sysFs-entry for dynamic reconfiguration. For more understanding of my view: I get a preconfigured/patched kernel tree from another co-worker in our project. I don't know what he has done in detail to the original source code. I just verified that there is no modification below drivers/i2c. So if there is a board specific initialization file I've overseen, just tell me, perhaps this is the solution. BTW: Why has I2C_CLASS_ALL been dropped? -- Kind Regards, Michael -- 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
