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musb can be suspended at the time some other driver wants to do ulpi transfers using usb_phy_io_* functions, and that can cause data abort, as it happened with isp1704_charger: http://article.gmane.org/gmane.linux.kernel/1226122 Add pm_runtime to ulpi functions to rectify this. This also adds io_dev to usb_phy so that pm_runtime_* functions can be used. Cc: Felipe Contreras <felipe.contreras@gmail.com> Signed-off-by: Grazvydas Ignotas <notasas@gmail.com> Signed-off-by: Felipe Balbi <balbi@ti.com>