[PATCH v7 14/25] iommu/exynos: Add support for runtime_pm

Marek Szyprowski
2015-05-19T13:20:34Z

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@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 946f95ae46bc..fcd23e9c409a 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -715,6 +715,7 @@ static int exynos_iommu_attach_device(struct iommu_domain *iommu_domain,
return -ENODEV;

list_for_each_entry(data, &owner->controllers, owner_node) {
+ pm_runtime_get_sync(data->sysmmu);
ret = __sysmmu_enable(data, pagetable, domain);
if (ret >= 0) {
data->master = dev;
@@ -756,6 +757,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *iommu_domain,
data->master = NULL;
list_del_init(&data->domain_node);
}
+ pm_runtime_put(data->sysmmu);
found = true;
}
}
--
1.9.2