On 9/23/2012 8:33 PM, Rafael J. Wysocki wrote: > On Sunday, September 23, 2012, Peter Stuge wrote: >> Rafael J. Wysocki wrote: >>> Well, we actually need to handle power domains appropriately. >> .. >>> Some work in that direction has been done in the ARM space, where we have >>> much more direct access to hardware, and I suppose it may be extended to >>> things like "ganged sets of ports" (which actually are power domains). >> >> Of course. >> >> Is there already an API for power domains there? What does it look like? > > Yes, there is, as it turns out. :-) > > Please see drivers/base/power/domain.c and include/linux/pm_domain.h. > > Of course, this only covers a limited set of use cases at the moment, but I > think it's better to extend the existing code to cover more of them than to > add new code of similar functionality. yeah. well... we also have the voltage rail framework, which came from ARM, but matches the ACPI paradigm much more closely. Ideally we map ACPI to the VR framework, and then have a more generic mapping from that to power domains. -- 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
