Unable to Access i2c port using wiringPI library

[lobo]

Maybe you can see this way, if a driver is already mapped to this address:

Code:

ls /sys/bus/platform/devices/ff650000.i2c/i2c-0/0-001b                         <
driver   name    power     rk808-clkout    rk808-rtc uevent
modalias of_node regulator rk808-regulator subsystem

Note, this is for i2c-0 where the rk808 i2c device 0x1b is, and you can see that rk808-clkout, rk808-rtc and rk808-regulator drivers are mapped to it. As this is also described in the devicetree.
For the i2c-1 device 0x68 you would list like this:

Code:

ls /sys/bus/platform/devices/ff140000.i2c/i2c-1/0-0068

I see in my devicetree that there is a DS3231 driver for that address, but I don't remember if I put this years ago, or it is there from Asus. Maybe it is there from Asus, than it would explain, that this address is used and you would need to change the devicetree.