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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>
This commit is contained in:
Guennadi Liakhovetski 2013-08-02 15:03:42 +02:00 committed by Mark Brown
parent 5ae90d8e46
commit e2b0509908
1 changed files with 6 additions and 1 deletions
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7
drivers/spi/spi-rspi.c
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@ -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");