iommu/exynos: Add support for runtime_pm
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>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index b7f679c..c658268 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -715,6 +715,7 @@
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 @@
data->master = NULL;
list_del_init(&data->domain_node);
}
+ pm_runtime_put(data->sysmmu);
found = true;
}
}