I've been thinkig about creating two child nodes for the independent musb
controllers on the am33. I've been thinking about the following:
diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
index 8e1248f..6aa9506 100644
--- a/arch/arm/boot/dts/am33xx.dtsi
+++ b/arch/arm/boot/dts/am33xx.dtsi
@@ -326,21 +326,78 @@
status = "disabled";
};
usb@47400000 {
compatible = "ti,musb-am33xx";
- reg = <0x47400000 0x1000 /* usbss */
- 0x47401000 0x800 /* musb instance 0 */
- 0x47401800 0x800>; /* musb instance 1 */
- interrupts = <17 /* usbss */
- 18 /* musb instance 0 */
- 19>; /* musb instance 1 */
- multipoint = <1>;
- num-eps = <16>;
- ram-bits = <12>;
- port0-mode = <3>;
- port1-mode = <3>;
- power = <250>;
+ reg = <0x47400000 0x1000>; /* usbss */
+ interrupts = <17>; /* usbss */
ti,hwmods = "usb_otg_hs";
+
+ usb0@0x47401000 {
+ reg = <0x47401000 0x800>; /* musb
instance 0 */
+ interrupts = <18>; /* musb
instance 0 */
+ multipoint = <1>;
+ num-eps = <16>;
+ ram-bits = <12>;
+ port-mode = <3>;
+ power = <250>;
+
+ phys = <&nopphy0>;
+ dmas = <&cppi41dma 0
+ &cppi41dma 1
+ &cppi41dma 2
+ &cppi41dma 3
+ &cppi41dma 4
+ &cppi41dma 32
+ &cppi41dma 34
+ &cppi41dma 36
+ &cppi41dma 38
+ &cppi41dma 40>;
+ dma-names = "rx1", "rx2", "rx3", "rx4", "rx5",
+ "tx1", "tx2", "tx3", "tx4", "tx5";
+ };
+
+ usb0@0x47401800 {
+ reg = <0x47401800 0x800>; /* musb
instance 1 */
+ interrupts = <19>; /* musb
instance 1 */
+ multipoint = <1>;
+ num-eps = <16>;
+ ram-bits = <12>;
+ port-mode = <3>;
+ power = <250>;
+
+ phys = <&nopphy1>;
+ dmas = <&cppi41dma 0
+ &cppi41dma 1
+ &cppi41dma 2
+ &cppi41dma 3
+ &cppi41dma 4
+ &cppi41dma 62
+ &cppi41dma 64
+ &cppi41dma 66
+ &cppi41dma 68
+ &cppi41dma 70>;
+ dma-names = "rx1", "rx2", "rx3", "rx4", "rx5",
+ "tx1", "tx2", "tx3", "tx4", "tx5";
+ };
+ };
Please keep in mind that his is not a proper patch it should point out
what I have in mind.
This would easy the for instance the dma channel assignment. Also, it will
move back to the port-mode property instead of portX-mode one which it has
now. This is kind of confusing since it is not a root hub or anything like
that it is a complete musb controller. Plus for the phys property could
easily take the one avaible and would not require which instance it
really it is.
Sebastian
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