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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>
This commit is contained in:
Marek Szyprowski 2015-05-19 15:20:34 +02:00 committed by Joerg Roedel
parent 1b09205436
commit ce70ca562b
1 changed files with 2 additions and 0 deletions
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2
drivers/iommu/exynos-iommu.c
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@ -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;
}
}