On Tue, Jan 24, 2017 at 10:58:46AM +0100, Alexandre Bailon wrote:
> DT binding for the TI DA8xx/OMAP-L1x/AM17xx/AM18xx CPPI 4.1 DMA controller.
>
> Signed-off-by: Alexandre Bailon <abailon@xxxxxxxxxxxx>
> ---
> .../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..c3944a6 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,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:
> usb_phy: usb-phy {
> compatible = "ti,da830-usb-phy";
> @@ -31,6 +47,9 @@ Example:
> usb0: usb@200000 {
> compatible = "ti,da830-musb";
> reg = <0x00200000 0x10000>;
> + ranges;
> + #address-cells = <1>;
> + #size-cells = <1>;
> interrupts = <58>;
> interrupt-names = "mc";
>
> @@ -39,5 +58,25 @@ 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,da830-cppi41";
> + reg = <0x201000 0x1000
> + 0x202000 0x1000
> + 0x204000 0x4000>;
This is creating overlapping addresses which we want to avoid. The
parent's ranges should be filled in and reg set to only those addresses
the parent will touch (0x200000-0x201000?). With that,
Acked-by: Rob Herring <robh@xxxxxxxxxx>
> + reg-names = "controller", "scheduler", "queuemgr";
> + interrupts = <58>;
> + #dma-cells = <2>;
> + #dma-channels = <4>;
> + };
> +
> };
> --
> 2.10.2
>
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