Anatolij and others: Can you explain why the ehci_fsl_mpc512x_drv_suspend() routine goes to the trouble of turning off the CMD_RUN bit in the EHCI command register, and why ehci_fsl_mpc512x_drv_resume() turns it back on? These routines handle power management for the EHCI controller. At the time they run, the root hub is guaranteed to be suspended -- that is, ehci_bus_suspend() has run and ehci_bus_resume() hasn't been called yet. As a result, the CMD_RUN bit should already be off and it should remain off. Would it be okay for me to remove the code that changes the CMD_RUN bit? Also, why does the resume routine call usb_hcd_resume_root_hub()? Is there a hardware bug that causes the controller not to issue the proper IRQ when a root-hub wakeup event occurs? Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
