mmc: atmel-mci: convert to dma_request_slave_channel_compat()

Use generic DMA DT helper. Platforms booting with or without DT populated
are both supported.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 12 insertions, 13 deletions

diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index e75774f72606..aca59d93d5a9 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -2230,10 +2230,15 @@ static void __exit atmci_cleanup_slot(struct atmel_mci_slot *slot,
         mmc_free_host(slot->mmc);
 }
 
-static bool atmci_filter(struct dma_chan *chan, void *slave)
+static bool atmci_filter(struct dma_chan *chan, void *pdata)
 {
-        struct mci_dma_data     *sl = slave;
+        struct mci_platform_data *sl_pdata = pdata;
+        struct mci_dma_data *sl;
 
+        if (!sl_pdata)
+                return false;
+
+        sl = sl_pdata->dma_slave;
         if (sl && find_slave_dev(sl) == chan->device->dev) {
                 chan->private = slave_data_ptr(sl);
                 return true;
@@ -2245,24 +2250,18 @@ static bool atmci_filter(struct dma_chan *chan, void *slave)
 static bool atmci_configure_dma(struct atmel_mci *host)
 {
         struct mci_platform_data        *pdata;
+        dma_cap_mask_t mask;
 
         if (host == NULL)
                 return false;
 
         pdata = host->pdev->dev.platform_data;
 
-        if (!pdata)
-                return false;
+        dma_cap_zero(mask);
+        dma_cap_set(DMA_SLAVE, mask);
 
-        if (pdata->dma_slave && find_slave_dev(pdata->dma_slave)) {
-                dma_cap_mask_t mask;
-
-                /* Try to grab a DMA channel */
-                dma_cap_zero(mask);
-                dma_cap_set(DMA_SLAVE, mask);
-                host->dma.chan =
-                        dma_request_channel(mask, atmci_filter, pdata->dma_slave);
-        }
+        host->dma.chan = dma_request_slave_channel_compat(mask, atmci_filter, pdata,
+                                                          &host->pdev->dev, "rxtx");
         if (!host->dma.chan) {
                 dev_warn(&host->pdev->dev, "no DMA channel available\n");
                 return false;