Subject: [PATCH v4 5/6] PCI: update dma configuration from DT

From: [email-masked] (Bjorn Helgaas)
Date: Fri, 23 Jan 2015 17:27:25 -0600

On Fri, Jan 23, 2015 at 05:32:38PM -0500, Murali Karicheri wrote:
> If there is a DT node available for the root bridge's parent device,
> use the dma configuration from that device node. For example, keystone
> PCI devices would require dma_pfn_offset to be set correctly in the
> device structure of the pci device in order to have the correct dma mask.
> The DT node will have dma-ranges defined for this. Also support using
> the DT property dma-coherent to allow coherent DMA operation by the
> PCI device.
> 
> This patch use the new helper function of_pci_dma_configure() to update
> the device dma configuration.
> 
> Cc: Joerg Roedel <[email-masked]>
> Cc: Grant Likely <[email-masked]>
> Cc: Rob Herring <[email-masked]>
> Cc: Bjorn Helgaas <[email-masked]>
> Cc: Will Deacon <[email-masked]>
> Cc: Russell King <[email-masked]>
> Cc: Arnd Bergmann <[email-masked]>
> Cc: Suravee Suthikulpanit <[email-masked]>
> 
> Signed-off-by: Murali Karicheri <[email-masked]>

I assume this series will be merged via some non-PCI tree, so:

Acked-by: Bjorn Helgaas <[email-masked]>

> ---
>  drivers/pci/probe.c |    2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
> index 23212f8..d7dcd6c 100644
> --- a/drivers/pci/probe.c
> +++ b/drivers/pci/probe.c
> @@ -6,6 +6,7 @@
>  #include <linux/delay.h>
>  #include <linux/init.h>
>  #include <linux/pci.h>
> +#include <linux/of_pci.h>
>  #include <linux/pci_hotplug.h>
>  #include <linux/slab.h>
>  #include <linux/module.h>
> @@ -1520,6 +1521,7 @@ void pci_device_add(struct pci_dev *dev, struct pci_bus *bus)
>  	dev->dev.dma_mask = &dev->dma_mask;
>  	dev->dev.dma_parms = &dev->dma_parms;
>  	dev->dev.coherent_dma_mask = 0xffffffffull;
> +	of_pci_dma_configure(dev);
>  
>  	pci_set_dma_max_seg_size(dev, 65536);
>  	pci_set_dma_seg_boundary(dev, 0xffffffff);
> -- 
> 1.7.9.5
>