Messages in this thread |  | | Date | Mon, 22 Jan 2018 12:09:30 +0800 | From | JeffyChen <> | Subject | Re: [PATCH v4 08/13] iommu/rockchip: Control clocks needed to access the IOMMU |
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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.
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