From 52fba2b85d30075490db023642632032371505c2 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Wed, 6 Aug 2014 14:59:04 +0200 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- drivers/spi/spi-sh-msiof.c | 7 +++++-- 1 file 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) { -- 2.20.1