Hi Frank, all, > > Which bus driver are you using? It obviously lacks class declaration, > > so the correct fix is to add the class there. > > The modules that are loading are (in reverse order): > adm1031 > ad5321 > mic184 > pca9540 > i2c_sensor > i2c_elektor > i2c_algo_pcf > i2c_core > > So I believe what you are asking for is the i2c_elektor driver for the > PCF8584 ISA to I2C chip. Correct, I just checked and this one actually lacks its class. Patch follows. Greg, can you please apply this one to your tree? Thanks. This patch adds a class definition to the elektor i2c bus driver. Without this definition, hardware monitoring chips located on such busses cannot possibly be driven. Signed-off-by: Jean Delvare <khali at linux-fr.org> --- linux-2.6.11-rc5/drivers/i2c/busses/i2c-elektor.c.orig 2004-12-24 22:33:49.000000000 +0100 +++ linux-2.6.11-rc5/drivers/i2c/busses/i2c-elektor.c 2005-02-25 20:41:26.000000000 +0100 @@ -183,6 +183,7 @@ static struct i2c_adapter pcf_isa_ops = { .owner = THIS_MODULE, + .class = I2C_CLASS_HWMON, .id = I2C_HW_P_ELEK, .algo_data = &pcf_isa_data, .name = "PCF8584 ISA adapter", -- Jean Delvare