Re: [PATCH 1/3] ARM: dts: da850: Add the cppi41 dma node

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On 01/10/2017 07:15 PM, David Lechner wrote:

This adds the device tree node for the cppi41 dma
used by the usb otg controller present in the da850 family of SoC's.

Signed-off-by: Alexandre Bailon <abailon@xxxxxxxxxxxx>
---
 arch/arm/boot/dts/da850.dtsi | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/da850.dtsi b/arch/arm/boot/dts/da850.dtsi
index 104155d..d6b406a 100644
--- a/arch/arm/boot/dts/da850.dtsi
+++ b/arch/arm/boot/dts/da850.dtsi
@@ -403,6 +403,22 @@
             phy-names = "usb-phy";
             status = "disabled";
         };
+        cppi41dma: dma-controller@201000 {
+            compatible = "ti,da8xx-cppi41";
+            reg =  <0x200000 0x1000

   I don't remember any DA8xx glue regs having to do with the CPPI 4.1...

+                0x201000 0x1000
+                0x202000 0x1000
+                0x204000 0x4000>;
+            reg-names = "glue", "controller",
+                    "scheduler", "queuemgr";
+            interrupts = <58>;
+            interrupt-names = "glue";
+            #dma-cells = <2>;
+            #dma-channels = <4>;
+            #dma-requests = <256>;
+            status = "disabled";

   Why disabled? It doesn't use any external pins...

Why enable it if musb node is not also enabled?

   Well, it's a good point.

[...]

MBR, Sergei

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