Messages in this thread Patch in this message | | | From | Laurent Pinchart <> | Subject | [RFC/PATCH 7/9] iommu: of: Document the of_iommu_configure() function | Date | Fri, 15 May 2015 02:00:08 +0300 |
| |
The function isn't trivial, document its behaviour.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> --- drivers/iommu/of_iommu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 43429ab62228..b922ed4f9fb3 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) { -- 2.3.6
| |