of/pci: Add of_pci_dma_configure() to update DMA configuration

Add of_pci_dma_configure() to allow updating the DMA configuration of the
PCI device using the configuration from DT of the parent of the root bridge
device.  Use the newly added APIs pci_get/put_host_bridge_device() for
implementing this.

[bhelgaas: fold in fix for host bridges with no parent OF device]
Tested-by: Suravee Suthikulpanit <[email protected]> (AMD Seattle)
Signed-off-by: Murali Karicheri <[email protected]>
Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Catalin Marinas <[email protected]>
Acked-by: Rob Herring <[email protected]>
Acked-by: Will Deacon <[email protected]>
CC: Joerg Roedel <[email protected]>
CC: Grant Likely <[email protected]>
CC: Russell King <[email protected]>
CC: Arnd Bergmann <[email protected]>

0 files changed, 0 insertions, 0 deletions