Hello, This patch series finally implements proper runtime pm support in Exynos IOMMU driver. This has been achieved by adding runtime pm notifiers, which lets SYSMMU controller to follow it's master device (the device which actually performs DMA transaction) runtime pm. The main idea behind this solution is an observation that any DMA activity from master device can be done only when master device is active, thus when master device is suspended SYSMMU controller device can also be suspended. This patchset finally solves the situation that power domains are always enabled, because all SYSMMU controllers (which belongs to those domains) are permanently active (because existing driver was simplified and kept SYSMMU device active all the time after initialization). This patchset requires my previous changes to Exynos IOMMU driver submitted in the "Exynos IOMMU: improve clock management" thread: http://www.spinics.net/lists/arm-kernel/msg505695.html Best regards Marek Szyprowski Samsung R&D Institute Poland Krzysztof Kozlowski (1): PM / Runtime: Add notifiers for device runtime PM events Marek Szyprowski (2): iommu/exynos: Remove excessive, useless debug iommu/exynos: Add proper runtime pm support drivers/base/power/generic_ops.c | 9 ++ drivers/base/power/power.h | 6 ++ drivers/base/power/runtime.c | 34 ++++++- drivers/iommu/exynos-iommu.c | 214 ++++++++++++++++++--------------------- include/linux/pm.h | 2 + include/linux/pm_runtime.h | 51 ++++++++++ 6 files changed, 201 insertions(+), 115 deletions(-) -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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