patches.renesas/0210-spi-rspi-provide-port-addresses-to-dmaengine-driver-.patch

From 265c240fa92c74c175dfb5cc4456e2e9b2039668 Mon Sep 17 00:00:00 2001
From: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Date: Fri, 2 Aug 2013 15:03:42 +0200
Subject: 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>
(cherry picked from commit e2b0509908aa5e874a1837a733422b6e8b8502b8)
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
 drivers/spi/spi-rspi.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

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");
-- 
1.8.5.rc3