Generic question about interfacing a microcontroller with a device: when is the current limit a problem?
An input pin is a High-Impedence device. It will typically only draw the current it needs. For the most part, you can assume it has a high resistance value in series with it's logic, as noted by the 20 MOhm resistor here.



If you attempt to inset that 120KΩ resistor inline, you may cause a logic high from the ATMega (~3.3V) to be read as a logic low. You are dropping 2.3 Volts over it, in your calculation, putting it below the Input Logic Low maximum. You will never have a logic high there.

Typically, you can directly connect a microcontroller's GPIO to an input pin directly without any issues.