linux-kernel - [PATCH v2 4/6] dma:imx-sdma:Use devm_clk_get

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Message-Id: <20240828085210.7159-1-liaoyuanhong@vivo.com>
Date: Wed, 28 Aug 2024 16:52:10 +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 4/6] dma:imx-sdma:Use devm_clk_get_enabled() helpers

Use devm_clk_get_enabled() instead of clk functions in imx-sdma.

Signed-off-by: Liao Yuanhong <liaoyuanhong@...o.com>
---
v2:Remove all enable related modifications, replace clk_prepare() with
devm_clk_get_prepared(), and configure COMPILE_TEST on the corresponding
node in Kconfig for easy compilation and debugging.
---
 drivers/dma/Kconfig    |  4 ++--
 drivers/dma/imx-sdma.c | 22 ++++------------------
 2 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index cc0a62c34861..c4ffb5d3e321 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -264,7 +264,7 @@ config IMG_MDC_DMA
 
 config IMX_DMA
 	tristate "i.MX DMA support"
-	depends on ARCH_MXC
+	depends on ARCH_MXC || COMPILE_TEST
 	select DMA_ENGINE
 	help
 	  Support the i.MX DMA engine. This engine is integrated into
@@ -272,7 +272,7 @@ config IMX_DMA
 
 config IMX_SDMA
 	tristate "i.MX SDMA support"
-	depends on ARCH_MXC
+	depends on ARCH_MXC || COMPILE_TEST
 	select DMA_ENGINE
 	select DMA_VIRTUAL_CHANNELS
 	help
diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
index 72299a08af44..07a017c40a82 100644
--- a/drivers/dma/imx-sdma.c
+++ b/drivers/dma/imx-sdma.c
@@ -2266,33 +2266,25 @@ static int sdma_probe(struct platform_device *pdev)
 	if (IS_ERR(sdma->regs))
 		return PTR_ERR(sdma->regs);
 
-	sdma->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
+	sdma->clk_ipg = devm_clk_get_prepared(&pdev->dev, "ipg");
 	if (IS_ERR(sdma->clk_ipg))
 		return PTR_ERR(sdma->clk_ipg);
 
-	sdma->clk_ahb = devm_clk_get(&pdev->dev, "ahb");
+	sdma->clk_ahb = devm_clk_get_prepared(&pdev->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(&pdev->dev, irq, sdma_int_handler, 0,
 				dev_name(&pdev->dev), sdma);
 	if (ret)
-		goto err_irq;
+		return ret;
 
 	sdma->irq = irq;
 
 	sdma->script_addrs = kzalloc(sizeof(*sdma->script_addrs), GFP_KERNEL);
 	if (!sdma->script_addrs) {
 		ret = -ENOMEM;
-		goto err_irq;
+		return ret;
 	}
 
 	/* initially no scripts available */
@@ -2407,10 +2399,6 @@ static int sdma_probe(struct platform_device *pdev)
 	dma_async_device_unregister(&sdma->dma_device);
 err_init:
 	kfree(sdma->script_addrs);
-err_irq:
-	clk_unprepare(sdma->clk_ahb);
-err_clk:
-	clk_unprepare(sdma->clk_ipg);
 	return ret;
 }
 
@@ -2422,8 +2410,6 @@ static void sdma_remove(struct platform_device *pdev)
 	devm_free_irq(&pdev->dev, sdma->irq, sdma);
 	dma_async_device_unregister(&sdma->dma_device);
 	kfree(sdma->script_addrs);
-	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];
-- 
2.25.1