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spi: sh-msiof: Configure DMA slave bus width

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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>
This commit is contained in:
Geert Uytterhoeven 2014-08-06 14:59:04 +02:00 committed by Mark Brown
parent 3e81b59208
commit 52fba2b85d
1 changed files with 5 additions and 2 deletions
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7
drivers/spi/spi-sh-msiof.c
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@ -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) {