linux-kernel - [PATCH 2/6] dma:dma-jz4780:Use devm_clk_get

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Message-Id: <20240823101933.9517-3-liaoyuanhong@vivo.com>
Date: Fri, 23 Aug 2024 18:19:29 +0800
From: Liao Yuanhong <liaoyuanhong@...o.com>
To: vkoul@...nel.org
Cc: linux-arm-kernel@...ts.infradead.org,
	dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Liao Yuanhong <liaoyuanhong@...o.com>
Subject: [PATCH 2/6] dma:dma-jz4780:Use devm_clk_get_enabled() helpers

Use devm_clk_get_enabled() instead of clk functions in dma-jz4780.

Signed-off-by: Liao Yuanhong <liaoyuanhong@...o.com>
---
 drivers/dma/dma-jz4780.c | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
index c9cfa341db51..151a85516419 100644
--- a/drivers/dma/dma-jz4780.c
+++ b/drivers/dma/dma-jz4780.c
@@ -149,7 +149,6 @@ struct jz4780_dma_dev {
 	struct dma_device dma_device;
 	void __iomem *chn_base;
 	void __iomem *ctrl_base;
-	struct clk *clk;
 	unsigned int irq;
 	const struct jz4780_dma_soc_data *soc_data;
 
@@ -857,6 +856,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 	struct dma_device *dd;
 	struct resource *res;
 	int i, ret;
+	struct clk *clk;
 
 	if (!dev->of_node) {
 		dev_err(dev, "This driver must be probed from devicetree\n");
@@ -896,15 +896,13 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	jzdma->clk = devm_clk_get(dev, NULL);
-	if (IS_ERR(jzdma->clk)) {
+	clk = devm_clk_get_enabled(dev, NULL);
+	if (IS_ERR(clk)) {
 		dev_err(dev, "failed to get clock\n");
-		ret = PTR_ERR(jzdma->clk);
+		ret = PTR_ERR(clk);
 		return ret;
 	}
 
-	clk_prepare_enable(jzdma->clk);
-
 	/* Property is optional, if it doesn't exist the value will remain 0. */
 	of_property_read_u32_index(dev->of_node, "ingenic,reserved-channels",
 				   0, &jzdma->chan_reserved);
@@ -972,7 +970,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)
-		goto err_disable_clk;
+		return ret;
 
 	jzdma->irq = ret;
 
@@ -980,7 +978,7 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 			  jzdma);
 	if (ret) {
 		dev_err(dev, "failed to request IRQ %u!\n", jzdma->irq);
-		goto err_disable_clk;
+		return ret;
 	}
 
 	ret = dmaenginem_async_device_register(dd);
@@ -1002,9 +1000,6 @@ static int jz4780_dma_probe(struct platform_device *pdev)
 
 err_free_irq:
 	free_irq(jzdma->irq, jzdma);
-
-err_disable_clk:
-	clk_disable_unprepare(jzdma->clk);
 	return ret;
 }
 
@@ -1015,7 +1010,6 @@ static void jz4780_dma_remove(struct platform_device *pdev)
 
 	of_dma_controller_free(pdev->dev.of_node);
 
-	clk_disable_unprepare(jzdma->clk);
 	free_irq(jzdma->irq, jzdma);
 
 	for (i = 0; i < jzdma->soc_data->nb_channels; i++)
-- 
2.25.1