DT binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx cppi41 dma controller.
Signed-off-by: Alexandre Bailon <[email protected]>
---
.../devicetree/bindings/usb/da8xx-usb.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/da8xx-usb.txt
b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
index ccb844a..2a4d737 100644
--- a/Documentation/devicetree/bindings/usb/da8xx-usb.txt
+++ b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
@@ -18,10 +18,26 @@ Required properties:
- phy-names: Should be "usb-phy"
+ - dmas: specifies the dma channels
+
+ - dma-names: specifies the names of the channels. Use "rxN" for receive
+ and "txN" for transmit endpoints. N specifies the endpoint number.
+
Optional properties:
~~~~~~~~~~~~~~~~~~~~
- vbus-supply: Phandle to a regulator providing the USB bus power.
+DMA
+~~~
+- compatible: ti,da8xx-cppi41
+- reg: offset and length of the following register spaces: USBSS, USB
+ CPPI DMA Controller, USB CPPI DMA Scheduler, USB Queue Manager
+- reg-names: glue, controller, scheduler, queuemgr
+- #dma-cells: should be set to 2. The first number represents the
+ endpoint number (0 … 3 for endpoints 1 … 4).
+ The second number is 0 for RX and 1 for TX transfers.
+- #dma-channels: should be set to 4 representing the 4 endpoints.
+
Example:
usb_phy: usb-phy {
compatible = "ti,da830-usb-phy";
@@ -39,5 +55,28 @@ Example:
phys = <&usb_phy 0>;
phy-names = "usb-phy";
+ dmas = <&cppi41dma 0 0 &cppi41dma 1 0
+ &cppi41dma 2 0 &cppi41dma 3 0
+ &cppi41dma 0 1 &cppi41dma 1 1
+ &cppi41dma 2 1 &cppi41dma 3 1>;
+ dma-names =
+ "rx1", "rx2", "rx3", "rx4",
+ "tx1", "tx2", "tx3", "tx4";
+
status = "okay";
};
+ cppi41dma: dma-controller@201000 {
+ compatible = "ti,da8xx-cppi41";
+ reg = <0x200000 0x1000
+ 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";
+
+ };
--
2.10.2
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