On 10/18/2012 6:56 PM, Matt Porter wrote:
> Adds AM33XX EDMA support to the am33xx.dtsi as documented in
> Documentation/devicetree/bindings/dma/ti-edma.txt
>
> Signed-off-by: Matt Porter <mporter@xxxxxx>
> ---
> arch/arm/boot/dts/am33xx.dtsi | 31 +++++++++++++++++++++++++++++++
> 1 file changed, 31 insertions(+)
>
> diff --git a/arch/arm/boot/dts/am33xx.dtsi b/arch/arm/boot/dts/am33xx.dtsi
> index bb31bff..ab9c78f 100644
> --- a/arch/arm/boot/dts/am33xx.dtsi
> +++ b/arch/arm/boot/dts/am33xx.dtsi
> @@ -62,6 +62,37 @@
> reg = <0x48200000 0x1000>;
> };
>
> + edma: edma@49000000 {
> + compatible = "ti,edma3";
> + ti,hwmods = "tpcc", "tptc0", "tptc1", "tptc2";
> + reg = <0x49000000 0x10000>,
> + <0x44e10f90 0x10>;
> + interrupt-parent = <&intc>;
> + interrupts = <12 13 14>;
> + #dma-cells = <1>;
> + dma-channels = <64>;
> + ti,edma-regions = <4>;
> + ti,edma-slots = <256>;
> + ti,edma-reserved-channels = <0 2
> + 14 2
> + 26 6
> + 48 4
> + 56 8>;
> + ti,edma-reserved-slots = <0 2
> + 14 2
> + 26 6
> + 48 4
> + 56 8
> + 64 127>;
No need to reserve any channels or slots on AM335x, I think. This is
used on DaVinci devices to share channels with DSP. I am not sure the
cortex-M3 or PRU on the AM335x need to (or even can) have EDMA access.
Thanks,
Sekhar
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