[PATCH v4 13/18] iommu: exynos: add support for runtime_pm

[Marek Szyprowski]

This patch fixes support for runtime power management for SYSMMU
controllers, so they are enabled when master device is attached.

Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
 drivers/iommu/exynos-iommu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index c6cca44d7858..f8609f40ae59 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -695,6 +695,7 @@ static int exynos_iommu_attach_device(struct iommu_domain *domain,
 		return -ENODEV;
 
 	list_for_each_entry(data, &owner->clients, owner_node) {
+		pm_runtime_get_sync(data->sysmmu);
 		ret = __sysmmu_enable(data, pagetable, domain);
 		if (ret >= 0) {
 			data->master = dev;
@@ -736,6 +737,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
 				data->master = NULL;
 				list_del_init(&data->domain_node);
 			}
+			pm_runtime_put(data->sysmmu);
 			found = true;
 		}
 	}
-- 
1.9.2