linux-kernel - [PATCH v2 2/7] dmaengine:at_hdmac:Use devm_clk_get

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Message-Id: <20240830094118.15458-3-liaoyuanhong@vivo.com>
Date: Fri, 30 Aug 2024 17:41:13 +0800
From: Liao Yuanhong <liaoyuanhong@...o.com>
To: vkoul@...nel.org
Cc: dmaengine@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	Liao Yuanhong <liaoyuanhong@...o.com>
Subject: [PATCH v2 2/7] dmaengine:at_hdmac:Use devm_clk_get_enabled() helpers

Use devm_clk_get_enabled() instead of clk functions in at_hdmac.

Signed-off-by: Liao Yuanhong <liaoyuanhong@...o.com>
---
v2:remove modifications related to the resume operation.
---
 drivers/dma/at_hdmac.c | 16 ++--------------
 1 file changed, 2 insertions(+), 14 deletions(-)

diff --git a/drivers/dma/at_hdmac.c b/drivers/dma/at_hdmac.c
index 40052d1bd0b5..2274aeb58271 100644
--- a/drivers/dma/at_hdmac.c
+++ b/drivers/dma/at_hdmac.c
@@ -1975,20 +1975,16 @@ static int __init at_dma_probe(struct platform_device *pdev)
 	atdma->dma_device.cap_mask = plat_dat->cap_mask;
 	atdma->all_chan_mask = (1 << plat_dat->nr_channels) - 1;
 
-	atdma->clk = devm_clk_get(&pdev->dev, "dma_clk");
+	atdma->clk = devm_clk_get_enabled(&pdev->dev, "dma_clk");
 	if (IS_ERR(atdma->clk))
 		return PTR_ERR(atdma->clk);
 
-	err = clk_prepare_enable(atdma->clk);
-	if (err)
-		return err;
-
 	/* force dma off, just in case */
 	at_dma_off(atdma);
 
 	err = request_irq(irq, at_dma_interrupt, 0, "at_hdmac", atdma);
 	if (err)
-		goto err_irq;
+		return err;
 
 	platform_set_drvdata(pdev, atdma);
 
@@ -2105,8 +2101,6 @@ static int __init at_dma_probe(struct platform_device *pdev)
 	dma_pool_destroy(atdma->lli_pool);
 err_desc_pool_create:
 	free_irq(platform_get_irq(pdev, 0), atdma);
-err_irq:
-	clk_disable_unprepare(atdma->clk);
 	return err;
 }
 
@@ -2130,16 +2124,11 @@ static void at_dma_remove(struct platform_device *pdev)
 		atc_disable_chan_irq(atdma, chan->chan_id);
 		list_del(&chan->device_node);
 	}
-
-	clk_disable_unprepare(atdma->clk);
 }
 
 static void at_dma_shutdown(struct platform_device *pdev)
 {
-	struct at_dma	*atdma = platform_get_drvdata(pdev);
-
 	at_dma_off(platform_get_drvdata(pdev));
-	clk_disable_unprepare(atdma->clk);
 }
 
 static int at_dma_prepare(struct device *dev)
@@ -2194,7 +2183,6 @@ static int at_dma_suspend_noirq(struct device *dev)
 
 	/* disable DMA controller */
 	at_dma_off(atdma);
-	clk_disable_unprepare(atdma->clk);
 	return 0;
 }
 
-- 
2.25.1