Zynq development issues

dmesg

[    1.035759] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.042319] usbcore: registered new interface driver usb-storage
[    1.073619] e0002000.ps7-usb supply vbus not found, using dummy regulator
[    1.103560] Registering platform device 'ci_hdrc.0'. Parent at e0002000.ps7-usb
[    1.114806] ci_hdrc ci_hdrc.0: ChipIdea HDRC found, revision: 22, lpm: 0; cap: f00d4100 op: f00d4140
[    1.136023] ci_hdrc ci_hdrc.0: unable to init phy: -110
[    1.141232] ci_hdrc: probe of ci_hdrc.0 failed with error -110