> > It works for me. good > If I understand correctly, is it possible to access chip LPC47MXXX > through i2c or isa? 10:40 < khali> Driver smsc47m1 always use i2c-isa driver. 10:40 < khali> it's not the same part of the device being accessed 10:41 < khali> throught ISA we have fan monitoring and control 10:41 < khali> on SMBus we have temperature and voltage monitoring 10:39 < khali> and a driver is supposed to be in progress, but it's a long time we didn't hear about it Thomas, Any news? Last test the BUS transport will be the byte write mode. i2cdump 0 0x2d Should give you a register dump. Datasheet is here http://www.smsc.com/main/tools/discontinued/47m15x.pdf Now please read the value on offset 0x31 (5V high limit) and add one to it and write it back to chip i2cset 0 0x2d 0x31 0xyourvall Readback should match. Thanks Regards Rudolf