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dmaengine: sprd: Add Spreadtrum DMA configuration

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This patch adds the 'device_config' and 'device_prep_slave_sg' interfaces
for users to configure DMA, as well as adding one 'struct sprd_dma_config'
structure to save Spreadtrum DMA configuration for each DMA channel.

Signed-off-by: Eric Long <eric.long@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Eric Long 2018-05-23 17:31:11 +08:00 • committed by Vinod Koul
parent 32fa20139e
commit ca1b7d3daf
2 changed files with 186 additions and 0 deletions
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4
include/linux/dma/sprd-dma.h
View file

@ -3,6 +3,10 @@
#ifndef _SPRD_DMA_H_
#define _SPRD_DMA_H_
#define SPRD_DMA_REQ_SHIFT 16
#define SPRD_DMA_FLAGS(req_mode, int_type) \
((req_mode) << SPRD_DMA_REQ_SHIFT | (int_type))
/*
* enum sprd_dma_req_mode: define the DMA request mode
* @SPRD_DMA_FRAG_REQ: fragment request mode