linux-kernel - [PATCH 07/11] dts: arm64: layerscape: add dma-ranges property to qoric-mc node

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Date:   Tue, 24 Sep 2019 20:12:38 +0200
From:   Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
To:     robh+dt@...nel.org, devicetree@...r.kernel.org,
        frowand.list@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-wireless@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, dmaengine@...r.kernel.org,
        etnaviv@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        xen-devel@...ts.xenproject.org, linux-tegra@...r.kernel.org,
        linux-media@...r.kernel.org, linux-pci@...r.kernel.org,
        Shawn Guo <shawnguo@...nel.org>, Li Yang <leoyang.li@....com>
Cc:     mbrugger@...e.com, robin.murphy@....com, f.fainelli@...il.com,
        james.quinlan@...adcom.com, wahrenst@....net,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Mark Rutland <mark.rutland@....com>
Subject: [PATCH 07/11] dts: arm64: layerscape: add dma-ranges property to qoric-mc node

qoriq-mc's dpmacs DMA configuration is inherited from their parent node,
which acts a bus in this regard. So far it maked all devices as
dma-coherent but no dma-ranges recommendation is made.

The truth is that the underlying interconnect has DMA constraints, so
add an empty dma-ranges in qoriq-mc's node in order for DT's DMA
configuration code to get the DMA constraints from it.

Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
---

 arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi | 1 +
 arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi | 1 +
 arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
index c676d0771762..f0d0b6145b72 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1088a.dtsi
@@ -698,6 +698,7 @@
 			      <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
 			msi-parent = <&its>;
 			iommu-map = <0 &smmu 0 0>;	/* This is fixed-up by u-boot */
+			dma-ranges;
 			dma-coherent;
 			#address-cells = <3>;
 			#size-cells = <1>;
diff --git a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
index 7a0be8eaa84a..fd6036b7865c 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls208xa.dtsi
@@ -340,6 +340,7 @@
 			      <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
 			msi-parent = <&its>;
 			iommu-map = <0 &smmu 0 0>;	/* This is fixed-up by u-boot */
+			dma-ranges;
 			dma-coherent;
 			#address-cells = <3>;
 			#size-cells = <1>;
diff --git a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
index 408e0ecdce6a..3735bb139cb2 100644
--- a/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-lx2160a.dtsi
@@ -868,6 +868,7 @@
 			msi-parent = <&its>;
 			/* iommu-map property is fixed up by u-boot */
 			iommu-map = <0 &smmu 0 0>;
+			dma-ranges;
 			dma-coherent;
 			#address-cells = <3>;
 			#size-cells = <1>;
-- 
2.23.0