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Message-Id: <20250903-v6-16-topic-sdma-v1-5-ac7bab629e8b@pengutronix.de>
Date: Wed, 03 Sep 2025 15:06:13 +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>
Subject: [PATCH 05/11] dmaengine: imx-sdma: make use of
devm_clk_get_prepared()
Make use of the devm_clk_get_prepared() to cleanup the error handling
during probe() and to automatically unprepare the clock during remove.
Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
---
drivers/dma/imx-sdma.c | 27 +++++++--------------------
1 file changed, 7 insertions(+), 20 deletions(-)
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index b6e649fda71dbce12a2106c94887f90d0aaaf600..5a571d3f33158813e0c56484600a49b19a6a72e2 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2270,26 +2270,18 @@ static int sdma_probe(struct platform_device *pdev)
if (IS_ERR(sdma->regs))
return PTR_ERR(sdma->regs);
- sdma->clk_ipg = devm_clk_get(dev, "ipg");
+ sdma->clk_ipg = devm_clk_get_prepared(dev, "ipg");
if (IS_ERR(sdma->clk_ipg))
return PTR_ERR(sdma->clk_ipg);
- sdma->clk_ahb = devm_clk_get(dev, "ahb");
+ sdma->clk_ahb = devm_clk_get_prepared(dev, "ahb");
if (IS_ERR(sdma->clk_ahb))
return PTR_ERR(sdma->clk_ahb);
- ret = clk_prepare(sdma->clk_ipg);
- if (ret)
- return ret;
-
- ret = clk_prepare(sdma->clk_ahb);
- if (ret)
- goto err_clk;
-
ret = devm_request_irq(dev, irq, sdma_int_handler, 0,
dev_name(dev), sdma);
if (ret)
- goto err_irq;
+ return ret;
sdma->irq = irq;
@@ -2330,11 +2322,11 @@ static int sdma_probe(struct platform_device *pdev)
ret = sdma_init(sdma);
if (ret)
- goto err_irq;
+ return ret;
ret = sdma_event_remap(sdma);
if (ret)
- goto err_irq;
+ return ret;
if (sdma->drvdata->script_addrs)
sdma_add_scripts(sdma, sdma->drvdata->script_addrs);
@@ -2363,7 +2355,7 @@ static int sdma_probe(struct platform_device *pdev)
ret = dma_async_device_register(&sdma->dma_device);
if (ret) {
dev_err(dev, "unable to register\n");
- goto err_irq;
+ return ret;
}
ret = of_dma_controller_register(np, sdma_xlate, sdma);
@@ -2399,10 +2391,7 @@ static int sdma_probe(struct platform_device *pdev)
err_register:
dma_async_device_unregister(&sdma->dma_device);
-err_irq:
- clk_unprepare(sdma->clk_ahb);
-err_clk:
- clk_unprepare(sdma->clk_ipg);
+
return ret;
}
@@ -2413,8 +2402,6 @@ static void sdma_remove(struct platform_device *pdev)
devm_free_irq(&pdev->dev, sdma->irq, sdma);
dma_async_device_unregister(&sdma->dma_device);
- clk_unprepare(sdma->clk_ahb);
- clk_unprepare(sdma->clk_ipg);
/* Kill the tasklet */
for (i = 0; i < MAX_DMA_CHANNELS; i++) {
struct sdma_channel *sdmac = &sdma->channel[i];
--
2.47.2
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