Maintenance for the week of February 16:
• [IN PROGRESS] ESO Store and Account System for maintenance – February 19, 9:00AM EST (14:00 UTC) - 6:00PM EST (23:00 UTC)
For giggles I just tried it with both PS4 and PS3 controllers, and it "worked". I plugged in using USB and enabled gamepad mode (settings -> gameplay). Give it a try and see how it goes.