diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-08-06 14:59:04 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-08-17 00:14:30 +0200 |
| commit | 52fba2b85d30075490db023642632032371505c2 (patch) | |
| tree | 53e4ecaf65a473d5401d65f2dd5e104f1575acd1 /drivers/spi | |
| parent | spi: sh-msiof: Fix leaking of unused DMA descriptors (diff) | |
| download | linux-52fba2b85d30075490db023642632032371505c2.tar.xz linux-52fba2b85d30075490db023642632032371505c2.zip | |
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')
| -rw-r--r-- | drivers/spi/spi-sh-msiof.c | 7 |
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) { |