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dt/bindings: da8xx-usb: Add binding for the CPPI 4.1 DMA controller 

DT binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx CPPI 4.1 DMA controller.

Signed-off-by: Alexandre Bailon <abailon@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Alexandre Bailon 2017-01-30 18:49:19 +01:00 committed by Vinod Koul
parent a15382b75b
commit d567206e47
1 changed files with 40 additions and 1 deletions
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41
Documentation/devicetree/bindings/usb/da8xx-usb.txt
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@ -18,10 +18,26 @@ Required properties:
- phy-names: Should be "usb-phy" - 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: Optional properties:
~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~
- vbus-supply: Phandle to a regulator providing the USB bus power. - vbus-supply: Phandle to a regulator providing the USB bus power.
DMA
~~~
- compatible: ti,da830-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.
Example: Example:
usb_phy: usb-phy { usb_phy: usb-phy {
compatible = "ti,da830-usb-phy"; compatible = "ti,da830-usb-phy";
@ -30,7 +46,10 @@ Example:
}; };
usb0: usb@200000 { usb0: usb@200000 {
compatible = "ti,da830-musb"; compatible = "ti,da830-musb";
reg = <0x00200000 0x10000>; reg = <0x00200000 0x1000>;
ranges;
#address-cells = <1>;
#size-cells = <1>;
interrupts = <58>; interrupts = <58>;
interrupt-names = "mc"; interrupt-names = "mc";
@ -39,5 +58,25 @@ Example:
phys = <&usb_phy 0>; phys = <&usb_phy 0>;
phy-names = "usb-phy"; 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"; status = "okay";
cppi41dma: dma-controller@201000 {
compatible = "ti,da830-cppi41";
reg = <0x201000 0x1000
0x202000 0x1000
0x204000 0x4000>;
reg-names = "controller", "scheduler", "queuemgr";
interrupts = <58>;
#dma-cells = <2>;
#dma-channels = <4>;
};
}; };