Eagleye Artik 530S: Enable I2S1 for mic


i am using the Artik530S Ubuntu 3.0.0 image on an Eagleye Artik 530S board and want to connect a mems microphone to the I2S pins exposed on the Rpi compatible connector. How do i enable the I2S1 bus so that i can start using arecord to record sound from the mems mic?