[PATCH v6 07/10] dmaengine: tegra: Use managed DMA controller registration

[Akhil R <akhilrajeev@nvidia.com>]

Switch to managed registration in probe. This simplifies the error
paths in the probe and also removes the requirement of the driver
remove function.

Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
Suggested-by: Frank Li <frank.li@nxp.com>
---
 drivers/dma/tegra186-gpc-dma.c | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c
index 3ac43ad19ed6..9bea2ffb3b9e 100644
--- a/drivers/dma/tegra186-gpc-dma.c
+++ b/drivers/dma/tegra186-gpc-dma.c
@@ -1483,37 +1483,27 @@ static int tegra_dma_probe(struct platform_device *pdev)
 	tdma->dma_dev.device_synchronize = tegra_dma_chan_synchronize;
 	tdma->dma_dev.residue_granularity = DMA_RESIDUE_GRANULARITY_BURST;
 
-	ret = dma_async_device_register(&tdma->dma_dev);
+	ret = dmaenginem_async_device_register(&tdma->dma_dev);
 	if (ret < 0) {
 		dev_err_probe(&pdev->dev, ret,
 			      "GPC DMA driver registration failed\n");
 		return ret;
 	}
 
-	ret = of_dma_controller_register(pdev->dev.of_node,
-					 tegra_dma_of_xlate, tdma);
+	ret = devm_of_dma_controller_register(&pdev->dev, pdev->dev.of_node,
+					      tegra_dma_of_xlate, tdma);
 	if (ret < 0) {
 		dev_err_probe(&pdev->dev, ret,
 			      "GPC DMA OF registration failed\n");
-
-		dma_async_device_unregister(&tdma->dma_dev);
 		return ret;
 	}
 
-	dev_info(&pdev->dev, "GPC DMA driver register %lu channels\n",
+	dev_info(&pdev->dev, "GPC DMA driver registered %lu channels\n",
 		 hweight_long(tdma->chan_mask));
 
 	return 0;
 }
 
-static void tegra_dma_remove(struct platform_device *pdev)
-{
-	struct tegra_dma *tdma = platform_get_drvdata(pdev);
-
-	of_dma_controller_free(pdev->dev.of_node);
-	dma_async_device_unregister(&tdma->dma_dev);
-}
-
 static int __maybe_unused tegra_dma_pm_suspend(struct device *dev)
 {
 	struct tegra_dma *tdma = dev_get_drvdata(dev);
@@ -1564,7 +1554,6 @@ static struct platform_driver tegra_dma_driver = {
 		.of_match_table = tegra_dma_of_match,
 	},
 	.probe		= tegra_dma_probe,
-	.remove		= tegra_dma_remove,
 };
 
 module_platform_driver(tegra_dma_driver);
-- 
2.50.1