linux-kernel - [PATCH 01/10] dmaengine: imx-sdma: drop legacy device

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Message-Id: <20250410232247.1434659-2-m.felsch@pengutronix.de>
Date: Fri, 11 Apr 2025 01:22:36 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: kernel@...gutronix.de,
	"vkoul@...nel.org, shawnguo@...nel.org, Sascha Hauer" <s.hauer@...gutronix.de>
Cc: dmaengine@...r.kernel.org,
	imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 01/10] 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.

Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
---
 drivers/dma/imx-sdma.c | 32 ++++++++++++++------------------
 1 file changed, 14 insertions(+), 18 deletions(-)

diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 3449006cd14b..699f0c6b5ae5 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2326,11 +2326,9 @@ 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)
@@ -2370,21 +2368,19 @@ 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;
+	}
 
-		spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
-		ret = of_address_to_resource(spba_bus, 0, &spba_res);
-		if (!ret) {
-			sdma->spba_start_addr = spba_res.start;
-			sdma->spba_end_addr = spba_res.end;
-		}
-		of_node_put(spba_bus);
+	spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
+	ret = of_address_to_resource(spba_bus, 0, &spba_res);
+	if (!ret) {
+		sdma->spba_start_addr = spba_res.start;
+		sdma->spba_end_addr = spba_res.end;
 	}
+	of_node_put(spba_bus);
 
 	/*
 	 * Because that device tree does not encode ROM script address,
-- 
2.39.5