diff options
| author | Marek Szyprowski <m.szyprowski@samsung.com> | 2015-05-19 15:20:37 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-05-29 10:50:08 +0200 |
| commit | aa759fd376fbbfc34d5bf21b8f280ce68c17d064 (patch) | |
| tree | fa6c5cf7c86187cf7f0800e9cbb70537d5eec680 /drivers/iommu | |
| parent | iommu/exynos: Init from dt-specific callback instead of initcall (diff) | |
| download | linux-aa759fd376fbbfc34d5bf21b8f280ce68c17d064.tar.xz linux-aa759fd376fbbfc34d5bf21b8f280ce68c17d064.zip | |
iommu/exynos: Add callback for initializing devices from device tree
This patch adds implementation of of_xlate callback, which prepares
masters device for attaching to IOMMU. This callback is called during
creating devices from device tree.
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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/exynos-iommu.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 0fb40ee9d728..97c41b8ab5d9 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -1146,6 +1146,33 @@ static void exynos_iommu_remove_device(struct device *dev) iommu_group_remove_device(dev); } +static int exynos_iommu_of_xlate(struct device *dev, + struct of_phandle_args *spec) +{ + struct exynos_iommu_owner *owner = dev->archdata.iommu; + struct platform_device *sysmmu = of_find_device_by_node(spec->np); + struct sysmmu_drvdata *data; + + if (!sysmmu) + return -ENODEV; + + data = platform_get_drvdata(sysmmu); + if (!data) + return -ENODEV; + + if (!owner) { + owner = kzalloc(sizeof(*owner), GFP_KERNEL); + if (!owner) + return -ENOMEM; + + INIT_LIST_HEAD(&owner->controllers); + dev->archdata.iommu = owner; + } + + list_add_tail(&data->owner_node, &owner->controllers); + return 0; +} + static struct iommu_ops exynos_iommu_ops = { .domain_alloc = exynos_iommu_domain_alloc, .domain_free = exynos_iommu_domain_free, @@ -1158,6 +1185,7 @@ static struct iommu_ops exynos_iommu_ops = { .add_device = exynos_iommu_add_device, .remove_device = exynos_iommu_remove_device, .pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE, + .of_xlate = exynos_iommu_of_xlate, }; static bool init_done; |