From 34681d84a0f7cc22ded1413dc79eef8a2f23d9c3 Mon Sep 17 00:00:00 2001 From: Sam Van Den Berge Date: Thu, 22 Sep 2016 20:51:15 +0200 Subject: dmaengine: s3c24xx: Add dma_slave_map for s3c2440 devices This patch updates the s3c24xx dma driver to be able to pass a dma_slave_map array via the platform data. This is needed to be able to use the new, simpler dmaengine API [1]. I used the virtual DMA channels as a parameter for the dma_filter function. By doing that, I could reuse the existing filter function in drivers/dma/s3c24xx-dma.c. I have tested this on my mini2440 board with the audio driver. According to my observations, dma_request_slave_channel in the function dmaengine_pcm_new in the file sound/soc/soc-generic-dmaengine-pcm.c now returns a valid DMA channel whereas before no DMA channel was returned at that point. Entries for DMACH_XD0, DMACH_XD1 and DMACH_TIMER are missing because I don't realy know which driver to use for these. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/393635.html Signed-off-by: Sam Van Den Berge Reviewed-by: Sylwester Nawrocki Acked-by: Arnd Bergmann Acked-by: Krzysztof Kozlowski Signed-off-by: Vinod Koul --- drivers/dma/s3c24xx-dma.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'drivers/dma/s3c24xx-dma.c') diff --git a/drivers/dma/s3c24xx-dma.c b/drivers/dma/s3c24xx-dma.c index ce67075589f5..d5c85e7d2061 100644 --- a/drivers/dma/s3c24xx-dma.c +++ b/drivers/dma/s3c24xx-dma.c @@ -1301,6 +1301,9 @@ static int s3c24xx_dma_probe(struct platform_device *pdev) s3cdma->slave.device_prep_dma_cyclic = s3c24xx_dma_prep_dma_cyclic; s3cdma->slave.device_config = s3c24xx_dma_set_runtime_config; s3cdma->slave.device_terminate_all = s3c24xx_dma_terminate_all; + s3cdma->slave.filter.map = pdata->slave_map; + s3cdma->slave.filter.mapcnt = pdata->slavecnt; + s3cdma->slave.filter.fn = s3c24xx_dma_filter; /* Register as many memcpy channels as there are physical channels */ ret = s3c24xx_dma_init_virtual_channels(s3cdma, &s3cdma->memcpy, -- cgit v1.2.3