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author | Zhen Lei | 2020-10-16 17:08:33 +0800 |
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committer | Arnd Bergmann | 2020-11-17 15:08:51 +0100 |
commit | e3389b0a14952aac7f2998bb98f633afb21eaa92 (patch) | |
tree | 71f4efff145c3ff036941ac05eae8e0102328cac /arch/h8300 | |
parent | 2013a4b684b6eb614ee5c9a3c07b0ae6f5ca96d9 (diff) |
arm64: dts: qcom: clear the warnings caused by empty dma-ranges
The scripts/dtc/checks.c requires that the node have empty "dma-ranges"
property must have the same "#address-cells" and "#size-cells" values as
the parent node. Otherwise, the following warnings is reported:
arch/arm64/boot/dts/qcom/ipq6018.dtsi:185.3-14: Warning \
(dma_ranges_format): /soc:dma-ranges: empty "dma-ranges" property but \
its #address-cells (1) differs from / (2)
arch/arm64/boot/dts/qcom/ipq6018.dtsi:185.3-14: Warning \
(dma_ranges_format): /soc:dma-ranges: empty "dma-ranges" property but \
its #size-cells (1) differs from / (2)
Arnd Bergmann figured out why it's necessary:
Also note that the #address-cells=<1> means that any device under
this bus is assumed to only support 32-bit addressing, and DMA will
have to go through a slow swiotlb in the absence of an IOMMU.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20201016090833.1892-3-thunder.leizhen@huawei.com'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/h8300')
0 files changed, 0 insertions, 0 deletions