[RFC PATCH 00/11 V7] MXS: Add i.MX28 USB Host driver

[Chen Peter-B29397]

> 
> Still use IRQF_SHARED for the usb interrupt, but:
> * The IRQ handler in ehci-mxs, that's set in hc_driver.irq would be
> always
> returning IRQ_NONE.
> * The IRQ handler in imx-otg would call the callback registered via
> imx_otg_set_irq_handler() only if the port was actually in host mode
> 
The interrupt which is registered by hcd core is usb_hcd_irq, it will call
ehci_irq. The hc_driver.irq is included in usb_hcd_irq.