linux-kernel - [PATCH 05/14] dmaengine: dma350: Register the DMA controller to DT DMA helpers

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Message-ID: <20250823154009.25992-6-jszhang@kernel.org>
Date: Sat, 23 Aug 2025 23:40:00 +0800
From: Jisheng Zhang <jszhang@...nel.org>
To: Vinod Koul <vkoul@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Robin Murphy <robin.murphy@....com>
Cc: dmaengine@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 05/14] dmaengine: dma350: Register the DMA controller to DT DMA helpers

Register the DMA controller to DT DMA helpers so that we convert a DT
phandle to a dma_chan structure.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
---
 drivers/dma/arm-dma350.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/arm-dma350.c b/drivers/dma/arm-dma350.c
index 17af9bb2a18f..6a9f81f941b0 100644
--- a/drivers/dma/arm-dma350.c
+++ b/drivers/dma/arm-dma350.c
@@ -7,6 +7,7 @@
 #include <linux/dma-mapping.h>
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_dma.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 
@@ -635,7 +636,7 @@ static int d350_probe(struct platform_device *pdev)
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to register DMA device\n");
 
-	return 0;
+	return of_dma_controller_register(dev->of_node, of_dma_xlate_by_chan_id, &dmac->dma);
 }
 
 static void d350_remove(struct platform_device *pdev)
@@ -643,6 +644,7 @@ static void d350_remove(struct platform_device *pdev)
 	struct d350 *dmac = platform_get_drvdata(pdev);
 
 	dma_async_device_unregister(&dmac->dma);
+	of_dma_controller_free(pdev->dev.of_node);
 }
 
 static const struct of_device_id d350_of_match[] __maybe_unused = {
-- 
2.50.0