spi: sh-msiof: Add DT support to DMA setup

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 18 insertions, 7 deletions

diff --git a/drivers/spi/spi-sh-msiof.c b/drivers/spi/spi-sh-msiof.c
index b19cbb4cb4a0..811a42dba92a 100644
--- a/drivers/spi/spi-sh-msiof.c
+++ b/drivers/spi/spi-sh-msiof.c
@@ -977,10 +977,11 @@ static struct dma_chan *sh_msiof_request_dma_chan(struct device *dev,
         dma_cap_zero(mask);
         dma_cap_set(DMA_SLAVE, mask);
 
-        chan = dma_request_channel(mask, shdma_chan_filter,
-                                  (void *)(unsigned long)id);
+        chan = dma_request_slave_channel_compat(mask, shdma_chan_filter,
+                                (void *)(unsigned long)id, dev,
+                                dir == DMA_MEM_TO_DEV ? "tx" : "rx");
         if (!chan) {
-                dev_warn(dev, "dma_request_channel failed\n");
+                dev_warn(dev, "dma_request_slave_channel_compat failed\n");
                 return NULL;
         }
 
@@ -1010,12 +1011,22 @@ static int sh_msiof_request_dma(struct sh_msiof_spi_priv *p)
         struct platform_device *pdev = p->pdev;
         struct device *dev = &pdev->dev;
         const struct sh_msiof_spi_info *info = dev_get_platdata(dev);
+        unsigned int dma_tx_id, dma_rx_id;
         const struct resource *res;
         struct spi_master *master;
         struct device *tx_dev, *rx_dev;
 
-        if (!info || !info->dma_tx_id || !info->dma_rx_id)
-                return 0;       /* The driver assumes no error */
+        if (dev->of_node) {
+                /* In the OF case we will get the slave IDs from the DT */
+                dma_tx_id = 0;
+                dma_rx_id = 0;
+        } else if (info && info->dma_tx_id && info->dma_rx_id) {
+                dma_tx_id = info->dma_tx_id;
+                dma_rx_id = info->dma_rx_id;
+        } else {
+                /* The driver assumes no error */
+                return 0;
+        }
 
         /* The DMA engine uses the second register set, if present */
         res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
@@ -1024,13 +1035,13 @@ static int sh_msiof_request_dma(struct sh_msiof_spi_priv *p)
 
         master = p->master;
         master->dma_tx = sh_msiof_request_dma_chan(dev, DMA_MEM_TO_DEV,
-                                                   info->dma_tx_id,
+                                                   dma_tx_id,
                                                    res->start + TFDR);
         if (!master->dma_tx)
                 return -ENODEV;
 
         master->dma_rx = sh_msiof_request_dma_chan(dev, DMA_DEV_TO_MEM,
-                                                   info->dma_rx_id,
+                                                   dma_rx_id,
                                                    res->start + RFDR);
         if (!master->dma_rx)
                 goto free_tx_chan;