[PATCH v2 0/2] PCI: get DMA configuration from parent device

Murali Karicheri
2014-12-24T22:12:25Z

PCI devices on Keystone doesn't have correct dma_pfn_offset set. This patch
add capability to set the dma configuration such as dma-mask, dma_pfn_offset,
and dma ops etc using the information from DT. The prior RFCs and discussions
are available at [1] and [2] below.

[2] : https://www.mail-archive.com/linux-kernel@vger.kernel.org/msg790244.html
[1] : http://www.gossamer-threads.com/lists/linux/kernel/2024591

Change history:
v2 - update size to coherent_dma_mask + 1 if dma-range info is missing
- also check the np for null.
v1 - updates based on the comments against initial RFC.
- Added a helper function to get the OF node of the parent
- Added an API in of_pci.c to update DMA configuration of the pci
device.

Murali Karicheri (2):
of/pci: add of_pci_dma_configure() update dma configuration
PCI: update dma configuration from DT

drivers/of/of_pci.c | 73 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/pci/probe.c | 2 ++
include/linux/of_pci.h | 12 ++++++++
3 files changed, 87 insertions(+)

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1.7.9.5