[PATCH v2 6/9] arm64: dts: ls1046a: use a pseudo-bus to constrain usb and sata dma size

[Li Yang]

From: Laurentiu Tudor <laurentiu.tudor at nxp.com>

Wrap the usb and sata controllers in an intermediate simple-bus and use
it to constrain the dma address size of these usb controllers to the 40
bits that they generate toward the interconnect.  This is required
because the SoC uses 48 bits address sizes and this mismatch would lead
to smmu context faults because the usb generates 40-bit addresses while
the smmu page tables are populated with 48-bit wide addresses.

Suggested-by: Robin Murphy <robin.murphy at arm.com>
Signed-off-by: Laurentiu Tudor <laurentiu.tudor at nxp.com>
Signed-off-by: Li Yang <leoyang.li at nxp.com>
---
 .../arm64/boot/dts/freescale/fsl-ls1046a.dtsi | 90 ++++++++++---------
 1 file changed, 49 insertions(+), 41 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
index e406499a26b4..132d7893b4b8 100644
--- a/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
+++ b/arch/arm64/boot/dts/freescale/fsl-ls1046a.dtsi
@@ -710,47 +710,55 @@ QORIQ_CLK_PLL_DIV(2)>,
 					    QORIQ_CLK_PLL_DIV(2)>;
 		};
 
-		usb0: usb at 2f00000 {
-			compatible = "snps,dwc3";
-			reg = <0x0 0x2f00000 0x0 0x10000>;
-			interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
-			dr_mode = "host";
-			snps,quirk-frame-length-adjustment = <0x20>;
-			snps,dis_rxdet_inp3_quirk;
-			snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
-			usb3-lpm-capable;
-		};
-
-		usb1: usb at 3000000 {
-			compatible = "snps,dwc3";
-			reg = <0x0 0x3000000 0x0 0x10000>;
-			interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
-			dr_mode = "host";
-			snps,quirk-frame-length-adjustment = <0x20>;
-			snps,dis_rxdet_inp3_quirk;
-			snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
-			usb3-lpm-capable;
-		};
-
-		usb2: usb at 3100000 {
-			compatible = "snps,dwc3";
-			reg = <0x0 0x3100000 0x0 0x10000>;
-			interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
-			dr_mode = "host";
-			snps,quirk-frame-length-adjustment = <0x20>;
-			snps,dis_rxdet_inp3_quirk;
-			snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
-			usb3-lpm-capable;
-		};
-
-		sata: sata at 3200000 {
-			compatible = "fsl,ls1046a-ahci";
-			reg = <0x0 0x3200000 0x0 0x10000>,
-				<0x0 0x20140520 0x0 0x4>;
-			reg-names = "ahci", "sata-ecc";
-			interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
-			clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL
-					    QORIQ_CLK_PLL_DIV(2)>;
+		aux_bus: aux_bus {
+			#address-cells = <2>;
+			#size-cells = <2>;
+			compatible = "simple-bus";
+			ranges;
+			dma-ranges = <0x0 0x0 0x0 0x0 0x100 0x00000000>;
+
+			usb0: usb at 2f00000 {
+				compatible = "snps,dwc3";
+				reg = <0x0 0x2f00000 0x0 0x10000>;
+				interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+				dr_mode = "host";
+				snps,quirk-frame-length-adjustment = <0x20>;
+				snps,dis_rxdet_inp3_quirk;
+				snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+				usb3-lpm-capable;
+			};
+
+			usb1: usb at 3000000 {
+				compatible = "snps,dwc3";
+				reg = <0x0 0x3000000 0x0 0x10000>;
+				interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
+				dr_mode = "host";
+				snps,quirk-frame-length-adjustment = <0x20>;
+				snps,dis_rxdet_inp3_quirk;
+				snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+				usb3-lpm-capable;
+			};
+
+			usb2: usb at 3100000 {
+				compatible = "snps,dwc3";
+				reg = <0x0 0x3100000 0x0 0x10000>;
+				interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
+				dr_mode = "host";
+				snps,quirk-frame-length-adjustment = <0x20>;
+				snps,dis_rxdet_inp3_quirk;
+				snps,incr-burst-type-adjustment = <1>, <4>, <8>, <16>;
+				usb3-lpm-capable;
+			};
+
+			sata: sata at 3200000 {
+				compatible = "fsl,ls1046a-ahci";
+				reg = <0x0 0x3200000 0x0 0x10000>,
+					<0x0 0x20140520 0x0 0x4>;
+				reg-names = "ahci", "sata-ecc";
+				interrupts = <GIC_SPI 69 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&clockgen QORIQ_CLK_PLATFORM_PLL
+						    QORIQ_CLK_PLL_DIV(2)>;
+			};
 		};
 
 		msi1: msi-controller at 1580000 {
-- 
2.37.1