mmc: tmio: Configure DMA slave bus width
authorLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tue, 15 Jul 2014 22:45:14 +0000 (00:45 +0200)
committerUlf Hansson <ulf.hansson@linaro.org>
Sat, 26 Jul 2014 09:38:19 +0000 (11:38 +0200)
Even though some implementations support 4-bytes data register access,
the tmio driver never configures the hardware in such a way and always
performs 2-bytes accesses. Hardcode the DMA transfer size to 2 bytes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
drivers/mmc/host/tmio_mmc_dma.c

index 03e7b28..eb8f1d5 100644 (file)
@@ -294,6 +294,7 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
                        cfg.slave_id = pdata->dma->slave_id_tx;
                cfg.direction = DMA_MEM_TO_DEV;
                cfg.dst_addr = res->start + (CTL_SD_DATA_PORT << host->pdata->bus_shift);
+               cfg.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
                cfg.src_addr = 0;
                ret = dmaengine_slave_config(host->chan_tx, &cfg);
                if (ret < 0)
@@ -312,6 +313,7 @@ void tmio_mmc_request_dma(struct tmio_mmc_host *host, struct tmio_mmc_data *pdat
                        cfg.slave_id = pdata->dma->slave_id_rx;
                cfg.direction = DMA_DEV_TO_MEM;
                cfg.src_addr = cfg.dst_addr;
+               cfg.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
                cfg.dst_addr = 0;
                ret = dmaengine_slave_config(host->chan_rx, &cfg);
                if (ret < 0)