Re:problem opening I2C device on MPC8260
From: David Bruce <hidden>
Date: 2005-03-14 19:38:28
Look back into the February logs of this group that was having simular discussions. In short: a.) 2.6 has some problems with the I2C. You may have to port over 2.4 i2c code. I don't know the specific details. b.) you need an adapter interface to create your device(s) (/dev/i2c-0). See ./drivers/i2c/i2c-pm826.c. You should be able to use this untouched. It is part of the configuration in 2.4.x. c.) The 2.4 version of i2c-algo-8260.c has a potential bug where all the __pa()'s need to be replaced by iopa(). I am using 2.4.24 of the ELDK and had problems with the i2c. Items b & c corrected them except that with "b" I had to load it *after* boot as a module. Don't know why but it works and have successfully used the i2c since. -- David Bruce MIT Lincoln Laboratory 244 Wood Street Lexington, MA 02420 781.981.3863 mailto:dbruce@ll.mit.edu