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authorGeert Uytterhoeven <geert+renesas@glider.be>2014-08-06 14:59:04 +0200
committerMark Brown <broonie@linaro.org>2014-08-16 17:14:30 -0500
commit52fba2b85d30075490db023642632032371505c2 (patch)
tree53e4ecaf65a473d5401d65f2dd5e104f1575acd1 /drivers/spi/spi-sh-msiof.c
parent3e81b59208fa4697c6c3b6eefb92892b47f8b1e7 (diff)
downloadlinux-52fba2b85d30075490db023642632032371505c2.tar.bz2
spi: sh-msiof: Configure DMA slave bus width
The new Renesas R-Car Gen2 DMA Controller driver (rcar-dmac) requires explicit configuration of the DMA slave bus width. Hardcode the DMA transfer size to 4 bytes, as MSIOF DMA is limited to 32-bit words. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-sh-msiof.c')
-rw-r--r--drivers/spi/spi-sh-msiof.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index 887c2084130f..b19cbb4cb4a0 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -987,10 +987,13 @@ static struct dma_chan *sh_msiof_request_dma_chan(struct device *dev,
memset(&cfg, 0, sizeof(cfg));
cfg.slave_id = id;
cfg.direction = dir;
- if (dir == DMA_MEM_TO_DEV)
+ if (dir == DMA_MEM_TO_DEV) {
cfg.dst_addr = port_addr;
- else
+ cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ } else {
cfg.src_addr = port_addr;
+ cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ }
ret = dmaengine_slave_config(chan, &cfg);
if (ret) {