AM335x XDMA_EVENT_INTR0 device tree configuration

user4052087

Hello, I want to use AM335 XDMA_EVENT_INTR0 to drive my DMA, but how to use the device tree to configure the driver? ,thanks very very much!

dmas = <&edma 20 0>; /*XDMA_EVENT_INTR0*/
dma-names = "rxtx";

&edma {
ti,edma-xbar-event-map = /bits/ 16<20 28>;
};

over 9 years ago

0 Biser Gatchev-XID over 9 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Yordan Kovachev over 9 years ago

TI__Guru**** 161600 points

Hi,

You should add:
dmas = <&edma 20 0>; /*XDMA_EVENT_INTR0*/
dma-names = "rxtx";
in the dts node, you'd like to use the xdma event. For example, if you'd like the GPIO to use the xdma event, then you should add:
&gpioX {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&gpioX_pins>;
dmas = <&edma 20 0>; /*XDMA_EVENT_INTR0*/
dma-names = "rxtx";
};

Best Regards,
Yordan

0 user4052087 over 9 years ago in reply to Yordan Kovachev

Prodigy 220 points

Thank you very much for your reply. How should I apply for the channel in the driver code?

dma_request_channel(mask, NULL, NULL); ？？？？

I tried to use it, but I still can't use the external interrupt.

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AM335x XDMA_EVENT_INTR0 device tree configuration