Re: [RFC PATCH v3 08/16] ARM: dts: add AM33XX EDMA support
From: Sekhar Nori <hidden>
Date: 2012-10-28 11:17:33
Also in:
linux-arm-kernel, linux-devicetree, linux-omap, linux-spi, lkml
On 10/18/2012 6:56 PM, Matt Porter wrote:
quoted hunk ↗ jump to hunk
Adds AM33XX EDMA support to the am33xx.dtsi as documented in Documentation/devicetree/bindings/dma/ti-edma.txt Signed-off-by: Matt Porter <redacted> --- 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