arm64: dts: ls1043a: Add 'dma-coherent' for ls1043a PCI nodes

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 ls1043a has this capability, so adding this
feature to improve the PCI performance.

Signed-off-by: Liu Gang <Gang.Liu@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
index 2c6832a..c451b81 100644 (file)
--- a/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1043a.dtsi
@@ -482,6 +482,7 @@
                        #address-cells = <3>;
                        #size-cells = <2>;
                        device_type = "pci";
+                       dma-coherent;
                        num-lanes = <4>;
                        bus-range = <0x0 0xff>;
                        ranges = <0x81000000 0x0 0x00000000 0x40 0x00010000 0x0 0x00010000   /* downstream I/O */
@@ -506,6 +507,7 @@
                        #address-cells = <3>;
                        #size-cells = <2>;
                        device_type = "pci";
+                       dma-coherent;
                        num-lanes = <2>;
                        bus-range = <0x0 0xff>;
                        ranges = <0x81000000 0x0 0x00000000 0x48 0x00010000 0x0 0x00010000   /* downstream I/O */
@@ -530,6 +532,7 @@
                        #address-cells = <3>;
                        #size-cells = <2>;
                        device_type = "pci";
+                       dma-coherent;
                        num-lanes = <2>;
                        bus-range = <0x0 0xff>;
                        ranges = <0x81000000 0x0 0x00000000 0x50 0x00010000 0x0 0x00010000   /* downstream I/O */