[PATCH v2] ARM: dts: am33xx: Move the cppi41dma node so it's probed early

[Ezequiel Garcia]

The DMA controller is needed for the USB controller to be correctly
registered. Therefore, if the DMA node is located at the end an unecessary
probe deferral is produced systematically.

This is easily fixed by moving the node at the beggining of the child list,
so it's probed first.

Signed-off-by: Ezequiel Garcia <ezequiel at vanguardiasur.com.ar>
--
v1->v2:
  * Added a comment to prevent a future clean-up based on the memory offset.

 arch/arm/boot/dts/am33xx.dtsi | 34 ++++++++++++++++++++--------------
 1 file changed, 20 insertions(+), 14 deletions(-)

diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 9770e35..02e1eb6 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -453,6 +453,26 @@
 			ti,hwmods = "usb_otg_hs";
 			status = "disabled";
 
+			/*
+			 * The probe order matches the child ordering so the
+			 * dma-controller node must be the first one to prevent
+			 * spurious probe deferrals.
+			 */
+			cppi41dma: dma-controller at 47402000 {
+				compatible = "ti,am3359-cppi41";
+				reg =  <0x47400000 0x1000
+					0x47402000 0x1000
+					0x47403000 0x1000
+					0x47404000 0x4000>;
+				reg-names = "glue", "controller", "scheduler", "queuemgr";
+				interrupts = <17>;
+				interrupt-names = "glue";
+				#dma-cells = <2>;
+				#dma-channels = <30>;
+				#dma-requests = <256>;
+				status = "disabled";
+			};
+
 			usb_ctrl_mod: control at 44e10620 {
 				compatible = "ti,am335x-usb-ctrl-module";
 				reg = <0x44e10620 0x10
@@ -556,20 +576,6 @@
 					"tx14", "tx15";
 			};
 
-			cppi41dma: dma-controller at 47402000 {
-				compatible = "ti,am3359-cppi41";
-				reg =  <0x47400000 0x1000
-					0x47402000 0x1000
-					0x47403000 0x1000
-					0x47404000 0x4000>;
-				reg-names = "glue", "controller", "scheduler", "queuemgr";
-				interrupts = <17>;
-				interrupt-names = "glue";
-				#dma-cells = <2>;
-				#dma-channels = <30>;
-				#dma-requests = <256>;
-				status = "disabled";
-			};
 		};
 
 		epwmss0: epwmss at 48300000 {
-- 
1.9.1