Hi Randy, On 01/22/2018 10:15 AM, JeffyChen wrote: > Hi Randy, > > On 01/22/2018 09:18 AM, Randy Li wrote: >>> >> Also the power domain driver could manage the clocks as well, I would >> suggest to use pm_runtime_*. > > actually the clocks required by pm domain may not be the same as what we > want to control here, there might be some clocks only be needed when > accessing mmu registers. > > but i'm not very sure about that, will confirm it with Simon Xue. confirmed with Simon, there might be some iommus don't have a pd, and the CONFIG_PM could be disabled. so it might be better to control clocks in iommu driver itself.
