Subject: [RFC/PATCH 7/9] iommu: of: Document the of_iommu_configure() function

From: [email-masked] (Will Deacon)
Date: Thu, 28 May 2015 14:02:39 +0100

On Fri, May 15, 2015 at 12:00:08AM +0100, Laurent Pinchart wrote:
> The function isn't trivial, document its behaviour.
> 
> Signed-off-by: Laurent Pinchart <[email-masked]>
> ---
>  drivers/iommu/of_iommu.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)

Thanks for doing this.

Acked-by: Will Deacon <[email-masked]>

Will

> 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
>