[PATCH] arm64: dts: ls2080a: Add 'dma-coherent' for ls2080a PCI nodes
From: Liu Gang <hidden>
Date: 2016-09-08 02:31:44
Also in:
linux-arm-kernel
Subsystem:
arm/freescale layerscape arm architecture, the rest · Maintainers:
Frank Li, Linus Torvalds
The 'dma-coherent' indicates that the hardware IP block can ensure the coherency of the data transferred from/to the IP block. This can avoid the software cache flush/invalid actions, and improve the performance significantly. The PCI IP block of ls2080a has this capability, so adding this feature to improve the PCI performance. Signed-off-by: Liu Gang <redacted> --- arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
index e3b6034..4eba766 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls2080a.dtsi@@ -588,6 +588,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <4>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x10 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -612,6 +613,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <4>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x12 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -636,6 +638,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <8>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x14 0x00010000 0x0 0x00010000 /* downstream I/O */
@@ -660,6 +663,7 @@ #address-cells = <3>; #size-cells = <2>; device_type = "pci"; + dma-coherent; num-lanes = <4>; bus-range = <0x0 0xff>; ranges = <0x81000000 0x0 0x00000000 0x16 0x00010000 0x0 0x00010000 /* downstream I/O */
--
2.1.0.27.g96db324