diff options
| author | Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> | 2015-05-15 02:00:08 +0300 |
|---|---|---|
| committer | Srinivas Kandagatla <srinivas.kandagatla@linaro.org> | 2015-10-14 12:52:25 +0100 |
| commit | 98fdadb2c9e86a2e4c289bcf4f3e4c0552025867 (patch) | |
| tree | 138976b86dcf1915eec7186943f2e5098bb3c753 /drivers/iommu/of_iommu.c | |
| parent | 3d6d7b1021a167a0e2809d3e6013d2ec94718f32 (diff) | |
iommu: of: Document the of_iommu_configure() function
The function isn't trivial, document its behaviour.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Diffstat (limited to 'drivers/iommu/of_iommu.c')
| -rw-r--r-- | drivers/iommu/of_iommu.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 60ba238090d9..136769a99822 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -133,6 +133,19 @@ struct iommu_ops *of_iommu_get_ops(struct device_node *np) return ops; } +/** + * of_iommu_configure - Configure and return the IOMMU for a device + * @dev: device for which to configure the IOMMU + * @master_np: device node of the bus master connected to the IOMMU + * + * The master_np parameter specifies the device node of the bus master seen by + * the IOMMU. This is usually the device node of the dev device, but can be the + * device node of a bridge when the device is dynamically discovered and + * instantiated and thus has no device node (such as PCI devices for instance). + * + * Return a pointer to the iommu_ops for the device, NULL if the device isn't + * connected to an IOMMU, or a negative value if an error occurs. + */ struct iommu_ops *of_iommu_configure(struct device *dev, struct device_node *master_np) { |