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| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2013-08-02 15:03:42 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2013-08-02 17:28:43 +0100 |
| commit | e2b0509908aa5e874a1837a733422b6e8b8502b8 (patch) | |
| tree | 166e61ae2031ef4d7264eb165f6f460d61cbdf43 /drivers/spi/spi-rspi.c | |
| parent | 5ae90d8e467e625e447000cb4335c4db973b1095 (diff) | |
| download | linux-e2b0509908aa5e874a1837a733422b6e8b8502b8.tar.gz linux-e2b0509908aa5e874a1837a733422b6e8b8502b8.tar.xz | |
spi: rspi: provide port addresses to dmaengine driver via slave configuration
Don't rely on shdma dhaengine driver getting DMA slave addresses from its
slave configuration. Instead provide those addresses, using a
dmaengine_slave_config() call.
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski+renesas@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-rspi.c')
| -rw-r--r-- | drivers/spi/spi-rspi.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index b44a6ac3cec9..5f122d9d2063 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -664,12 +664,13 @@ static irqreturn_t rspi_irq(int irq, void *_sr) static int rspi_request_dma(struct rspi_data *rspi, struct platform_device *pdev) { + struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); struct rspi_plat_data *rspi_pd = pdev->dev.platform_data; dma_cap_mask_t mask; struct dma_slave_config cfg; int ret; - if (!rspi_pd) + if (!res || !rspi_pd) return 0; /* The driver assumes no error. */ rspi->dma_width_16bit = rspi_pd->dma_width_16bit; @@ -683,6 +684,8 @@ static int rspi_request_dma(struct rspi_data *rspi, if (rspi->chan_rx) { cfg.slave_id = rspi_pd->dma_rx_id; cfg.direction = DMA_DEV_TO_MEM; + cfg.dst_addr = 0; + cfg.src_addr = res->start + RSPI_SPDR; ret = dmaengine_slave_config(rspi->chan_rx, &cfg); if (!ret) dev_info(&pdev->dev, "Use DMA when rx.\n"); @@ -698,6 +701,8 @@ static int rspi_request_dma(struct rspi_data *rspi, if (rspi->chan_tx) { cfg.slave_id = rspi_pd->dma_tx_id; cfg.direction = DMA_MEM_TO_DEV; + cfg.dst_addr = res->start + RSPI_SPDR; + cfg.src_addr = 0; ret = dmaengine_slave_config(rspi->chan_tx, &cfg); if (!ret) dev_info(&pdev->dev, "Use DMA when tx\n"); |