Commit fc373e47 authored Dec 08, 2020 by Peter Ujfalusi Committed by Vinod Koul Dec 11, 2020

dmaengine: ti: Add support for k3 event routers



In k3 architecture a DMA channel (in TR momde) can be triggered by global
events, origination from different modules.

The events for triggers can be sent from any module which is connected to
PSI-L fabric, but the event number to be sent is DMA channel specific, it
is only known after the channel itself is requested.

The router operation needs to be split up:
- route_allocate: configure the dma_spec for the DMA and store the
  configuration which is needed for the router's input
- set_event: callback used by the DMA driver to set the event number for
  the channel and enable the routing

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20201208090440.31792-16-peter.ujfalusi@ti.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>

parent 2329725d

include/linux/dma/k3-event-router.h

0 → 100644

+16 −0

Original line number	Diff line number	Diff line
		/* SPDX-License-Identifier: GPL-2.0 */
		/*
		* Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com
		*/

		#ifndef K3_EVENT_ROUTER_
		#define K3_EVENT_ROUTER_

		#include <linux/types.h>

		struct k3_event_route_data {
		void *priv;
		int (set_event)(void priv, u32 event);
		};

		#endif /* K3_EVENT_ROUTER_ */

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