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authorSam Van Den Berge <sam.van.den.berge@telenet.be>2016-09-22 21:51:15 +0300
committerVinod Koul <vinod.koul@intel.com>2016-09-26 20:43:04 +0300
commit34681d84a0f7cc22ded1413dc79eef8a2f23d9c3 (patch)
tree2813bf63617076fafc4e988d1b85a427986a8d85 /drivers/dma/s3c24xx-dma.c
parent360af35b08da9def3be8b67398f4e0f90c292e37 (diff)
downloadlinux-34681d84a0f7cc22ded1413dc79eef8a2f23d9c3.tar.xz
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 <sam.van.den.berge@telenet.be> Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Diffstat (limited to 'drivers/dma/s3c24xx-dma.c')
-rw-r--r--drivers/dma/s3c24xx-dma.c3
1 files changed, 3 insertions, 0 deletions
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,