On 01/17/2017 05:20 PM, Alexandre Bailon wrote:
DT binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx cppi41 dma controller.
"CPPI 4.1 DMA" again.
Signed-off-by: Alexandre Bailon <abailon@xxxxxxxxxxxx>
---
.../devicetree/bindings/usb/da8xx-usb.txt | 42 ++++++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/da8xx-usb.txt b/Documentation/devicetree/bindings/usb/da8xx-usb.txt
index ccb844a..aed3169 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: CPPI DMA Controller,
+ CPPI DMA Scheduler, Queue Manager
+- reg-names: "controller", "scheduler", "queuemgr"
+- #dma-cells: should be set to 2. The first number represents the
+ channel 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.
Shouldn't the # of channels be a part of the glue data?
[...]
@@ -39,5 +58,28 @@ 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 = <0x201000 0x1000
+ 0x202000 0x1000
+ 0x204000 0x4000>;
+ reg-names = "controller", "scheduler", "queuemgr";
+ interrupts = <58>;
+ interrupt-names = "glue";
+ #dma-cells = <2>;
+ #dma-channels = <4>;
+ #dma-requests = <256>;
Not seeing this prop documented...
+ status = "okay";
Can be omitted.
+ };
+
};
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