linux-kernel - [PATCH v2 03/10] dmaengine: imx-sdma: drop legacy device

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Message-Id: <20250911-v6-16-topic-sdma-v2-3-d315f56343b5@pengutronix.de>
Date: Thu, 11 Sep 2025 23:56:44 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: Vinod Koul <vkoul@...nel.org>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Jiada Wang <jiada_wang@...tor.com>
Cc: dmaengine@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Marco Felsch <m.felsch@...gutronix.de>, Frank Li <Frank.Li@....com>
Subject: [PATCH v2 03/10] dmaengine: imx-sdma: drop legacy device_node np
 check

The legacy 'if (np)' was required in past where we had pdata and dt.
Nowadays the driver binds only to dt platforms. So using a new kernel
but still use pdata is not possible, therefore we can drop the legacy
'if' code path.

Reviewed-by: Frank Li <Frank.Li@....com>
Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
---
 drivers/dma/imx-sdma.c | 18 +++++++-----------
 1 file changed, 7 insertions(+), 11 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 56daaeb7df03986850c9c74273d0816700581dc0..dab3589e1c8d9efe06e16925c53554f8e22ce679 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2355,11 +2355,9 @@ static int sdma_probe(struct platform_device *pdev)
 			vchan_init(&sdmac->vc, &sdma->dma_device);
 	}
 
-	if (np) {
-		sdma->iram_pool = of_gen_pool_get(np, "iram", 0);
-		if (sdma->iram_pool)
-			dev_info(&pdev->dev, "alloc bd from iram.\n");
-	}
+	sdma->iram_pool = of_gen_pool_get(np, "iram", 0);
+	if (sdma->iram_pool)
+		dev_info(&pdev->dev, "alloc bd from iram.\n");
 
 	ret = sdma_init(sdma);
 	if (ret)
@@ -2399,12 +2397,10 @@ static int sdma_probe(struct platform_device *pdev)
 		goto err_init;
 	}
 
-	if (np) {
-		ret = of_dma_controller_register(np, sdma_xlate, sdma);
-		if (ret) {
-			dev_err(&pdev->dev, "failed to register controller\n");
-			goto err_register;
-		}
+	ret = of_dma_controller_register(np, sdma_xlate, sdma);
+	if (ret) {
+		dev_err(&pdev->dev, "failed to register controller\n");
+		goto err_register;
 	}
 
 	/*

-- 
2.47.3