| From d7006a1ea766a4189721fc58a843d0c56dd136b9 Mon Sep 17 00:00:00 2001 |
| From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> |
| Date: Wed, 16 Jul 2014 00:45:14 +0200 |
| Subject: mmc: tmio: Configure DMA slave bus width |
| |
| 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> |
| (cherry picked from commit 39ab196243e8732ad68928be97129305b29afbbd) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| drivers/mmc/host/tmio_mmc_dma.c | 2 ++ |
| 1 file changed, 2 insertions(+) |
| |
| diff --git a/drivers/mmc/host/tmio_mmc_dma.c b/drivers/mmc/host/tmio_mmc_dma.c |
| index 03e7b280cb4c..eb8f1d5c34b1 100644 |
| --- a/drivers/mmc/host/tmio_mmc_dma.c |
| +++ b/drivers/mmc/host/tmio_mmc_dma.c |
| @@ -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) |
| -- |
| 2.1.2 |
| |
