On Wed, 28 Sep 2011, Munegowda, Keshava wrote: > Thanks paul, > > But In USB Host case, there is a challenge! > > I need both usbhost_48m_fck and usbhost_120m_fck to be turned on when > I invoke pm_runtime_get_sync ; so there are couple of options to do this > > 1. use clk_get with hard coded usbhost_120m_fck name in usbhs driver > enable this clock after invoking pm_runtime_get_sync > > 2. add an additional flag in hwmod ; so that pm_runtime_get_sync will enable > main clock as well as optional clocks > > please comment on these two approaches.. Looks like you picked approach #1 which is fine with me. Here's what I don't understand about how this clock is used, though. According to the 34xx TRM vZR Section 24.2.3.1.2 "High-Speed USB Host Subsystem Clocks", this is only used to "clock EHCI controller internal logic". So if EHCI is not being used, it would seem to me that this clock shouldn't be enabled? But patch #5 seems to enable and disable it unconditionally. Am I missing something here? - Paul -- 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
