On Fri, Feb 25, 2011 at 03:40:58PM +0530, Hema HK wrote: > This patch series supports the retention and offmode support in the > idle path for musb driver using runtime pm APIs. > > This is restricted to support offmode and retention only when device not > connected.When device/cable connected with gadget driver loaded, configured > to no idle/standby which will not allow the core transition to retention > or off. > > There is no context save/restore done by hardware for musb in OMAP3 > and OMAP4,driver has to take care of saving and restoring the context > during offmode. > > Musb has a requirement of configuring sysconfig register to force > idle/standby mode and set the ENABLE_FORCE bit in module STANDBY register > for retention and offmode support. > > Runtime pm and hwmod frameworks will take care of configuring to force > idle/standby when pm_runtime_put_sync is called and back to no > idle/standby when pm_runeime_get_sync is called. > > Compile, boot tested and also tested the retention in the idle path on > OMAP3630Zoom3. And tested the global suspend/resume with offmode enabled. > Usb basic functionality tested on OMAP4430SDP. > > There is some problem with idle path offmode in mainline, I could not test > with offmode. But I have tested this patch with resetting the controller > in the idle path when wakeup from retention just to make sure that the > context is lost, and restore path is working fine. please base this off of my for-next branch -- balbi -- 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
