mmc: atmel-mci: remove compat for non DT board when requesting dma chan

index a7b59ba..de2287c 100644
@@ -2272,23 +2272,6 @@ static void atmci_cleanup_slot(struct atmel_mci_slot *slot,
 	mmc_free_host(slot->mmc);
 }
 
-static bool atmci_filter(struct dma_chan *chan, void *pdata)
-{
-	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;
-	} else {
-		return false;
-	}
-}
-
 static bool atmci_configure_dma(struct atmel_mci *host)
 {
 	struct mci_platform_data	*pdata;

@@ -2302,8 +2285,7 @@ static bool atmci_configure_dma(struct atmel_mci *host)
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	host->dma.chan = dma_request_slave_channel_compat(mask, atmci_filter, pdata,
-							  &host->pdev->dev, "rxtx");
+	host->dma.chan = dma_request_slave_channel(&host->pdev->dev, "rxtx");
 	if (!host->dma.chan) {
 		dev_warn(&host->pdev->dev, "no DMA channel available\n");
 		return false;

index de2287c..caddbbd 100644
@@ -2272,37 +2272,40 @@ static void atmci_cleanup_slot(struct atmel_mci_slot *slot,
 	mmc_free_host(slot->mmc);
 }
 
-static bool atmci_configure_dma(struct atmel_mci *host)
+static int atmci_configure_dma(struct atmel_mci *host)
 {
 	struct mci_platform_data	*pdata;
 	dma_cap_mask_t mask;
+	int ret = 0;
 
 	if (host == NULL)
-		return false;
+		return -EINVAL;
 
 	pdata = host->pdev->dev.platform_data;
 
 	dma_cap_zero(mask);
 	dma_cap_set(DMA_SLAVE, mask);
 
-	host->dma.chan = dma_request_slave_channel(&host->pdev->dev, "rxtx");
-	if (!host->dma.chan) {
-		dev_warn(&host->pdev->dev, "no DMA channel available\n");
-		return false;
-	} else {
-		dev_info(&host->pdev->dev,
-					"using %s for DMA transfers\n",
-					dma_chan_name(host->dma.chan));
-
-		host->dma_conf.src_addr = host->mapbase + ATMCI_RDR;
-		host->dma_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-		host->dma_conf.src_maxburst = 1;
-		host->dma_conf.dst_addr = host->mapbase + ATMCI_TDR;
-		host->dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
-		host->dma_conf.dst_maxburst = 1;
-		host->dma_conf.device_fc = false;
-		return true;
+	host->dma.chan = dma_request_slave_channel_reason(&host->pdev->dev, "rxtx");
+	if (IS_ERR(host->dma.chan)) {
+		ret = PTR_ERR(host->dma.chan);
+		if (ret != -EPROBE_DEFER)
+			dev_warn(&host->pdev->dev, "no DMA channel available\n");
+		return ret;
 	}
+
+	dev_info(&host->pdev->dev,
+			"using %s for DMA transfers\n",
+			dma_chan_name(host->dma.chan));
+
+	host->dma_conf.src_addr = host->mapbase + ATMCI_RDR;
+	host->dma_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	host->dma_conf.src_maxburst = 1;
+	host->dma_conf.dst_addr = host->mapbase + ATMCI_TDR;
+	host->dma_conf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+	host->dma_conf.dst_maxburst = 1;
+	host->dma_conf.device_fc = false;
+	return ret;
 }
 
 /*

@@ -2419,7 +2422,10 @@ static int __init atmci_probe(struct platform_device *pdev)
 
 	/* Get MCI capabilities and set operations according to it */
 	atmci_get_cap(host);
-	if (atmci_configure_dma(host)) {
+	ret = atmci_configure_dma(host);
+	if (ret == -EPROBE_DEFER)
+		goto err_dma_probe_defer;
+	if (ret == 0) {
 		host->prepare_data = &atmci_prepare_data_dma;
 		host->submit_data = &atmci_submit_data_dma;
 		host->stop_transfer = &atmci_stop_transfer_dma;

@@ -2506,6 +2512,7 @@ err_init_slot:
 	del_timer_sync(&host->timer);
 	if (host->dma.chan)
 		dma_release_channel(host->dma.chan);
+err_dma_probe_defer:
 	free_irq(irq, host);
 	return ret;
 }

@@ -2573,6 +2580,7 @@ static const struct dev_pm_ops atmci_dev_pm_ops = {
 };
 
 static struct platform_driver atmci_driver = {
+	.probe		= atmci_probe,
 	.remove		= __exit_p(atmci_remove),
 	.driver		= {
 		.name		= "atmel_mci",

@@ -2583,7 +2591,7 @@ static struct platform_driver atmci_driver = {
 
 static int __init atmci_init(void)
 {
-	return platform_driver_probe(&atmci_driver, atmci_probe);
+	return platform_driver_register(&atmci_driver);
 }
 
 static void __exit atmci_exit(void)

@@ -2591,7 +2599,7 @@ static void __exit atmci_exit(void)
 	platform_driver_unregister(&atmci_driver);
 }
 
-late_initcall(atmci_init); /* try to load after dma driver when built-in */
+subsys_initcall(atmci_init);
 module_exit(atmci_exit);
 
 MODULE_DESCRIPTION("Atmel Multimedia Card Interface driver");