The dma-ranges DT property describes the DMA translation between a
parent bus and its children, and so having a dma-ranges property in
the root node makes little sense, but it doesn't harm either.
However, recent kernels (v5.5+) have started spewing warnings into
the kernel log of the following nature:
OF: translation of DMA address(0) to CPU address failed node(/uart@2a400000)
OF: translation of DMA address(0) to CPU address failed node(/pmu)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@70000000)
OF: translation of DMA address(0) to CPU address failed node(/uart@51040000)
OF: translation of DMA address(0) to CPU address failed node(/gpio@51000000)
OF: translation of DMA address(0) to CPU address failed node(/i2c@51210000)
OF: translation of DMA address(0) to CPU address failed node(/gpio-keys)
OF: translation of DMA address(0) to CPU address failed
node(/tpm_tis@10000000)
OF: translation of DMA address(0) to CPU address failed node(/sdhci@52300000)
OF: translation of DMA address(0) to CPU address failed
node(/ethernet@522d0000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
OF: translation of DMA address(0) to CPU address failed node(/pcie@60000000)
and so we should probably get rid of this bogus dma-ranges property.
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi | 1 -
1 file changed, 1 deletion(-)
diff --git a/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
b/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
index afb9e2c779df..2ee3821fca0b 100644
--- a/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
+++ b/Silicon/Socionext/SynQuacer/DeviceTree/SynQuacer.dtsi
@@ -21,7 +21,6 @@
#address-cells = <2>;
#size-cells = <2>;
interrupt-parent = <&gic>;
- dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x0>;
aliases {
serial0 = &soc_uart0;
--
2.17.1
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