| Message ID | 1407329949-5695-8-git-send-email-geert+renesas@glider.be (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Wed, Aug 06, 2014 at 02:59:04PM +0200, Geert Uytterhoeven wrote: > 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. Applied, thanks.
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) {
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> --- drivers/spi/spi-sh-msiof.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)