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Commit 39ab1962 authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Ulf Hansson
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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: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent e36152aa

drivers/mmc/host/tmio_mmc_dma.c

+2 −0
Original line number Diff line number Diff line
@@ -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)