linux-kernel - [PATCH 1/2] i2c: emev2: Use devm_clk_get

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20240822025258.53263-2-rongqianfeng@vivo.com>
Date: Thu, 22 Aug 2024 10:52:57 +0800
From: Rong Qianfeng <rongqianfeng@...o.com>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Andi Shyti <andi.shyti@...nel.org>,
	Paul Cercueil <paul@...pouillou.net>,
	linux-renesas-soc@...r.kernel.org,
	linux-i2c@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-mips@...r.kernel.org
Cc: opensource.kernel@...o.com,
	Rong Qianfeng <rongqianfeng@...o.com>
Subject: [PATCH 1/2] i2c: emev2: Use devm_clk_get_enabled() helpers

The devm_clk_get_enabled() helpers:
    - call devm_clk_get()
    - call clk_prepare_enable() and register what is needed in order to
     call clk_disable_unprepare() when needed, as a managed resource.

This simplifies the code and avoids the calls to clk_disable_unprepare().

While at it, remove the goto label "err_clk:", and use its return value 
to return the error code.

Signed-off-by: Rong Qianfeng <rongqianfeng@...o.com>
---
 drivers/i2c/busses/i2c-emev2.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/drivers/i2c/busses/i2c-emev2.c b/drivers/i2c/busses/i2c-emev2.c
index 557409410445..20efe0b0cb85 100644
--- a/drivers/i2c/busses/i2c-emev2.c
+++ b/drivers/i2c/busses/i2c-emev2.c
@@ -373,14 +373,10 @@ static int em_i2c_probe(struct platform_device *pdev)
 
 	strscpy(priv->adap.name, "EMEV2 I2C", sizeof(priv->adap.name));
 
-	priv->sclk = devm_clk_get(&pdev->dev, "sclk");
+	priv->sclk = devm_clk_get_enabled(&pdev->dev, "sclk");
 	if (IS_ERR(priv->sclk))
 		return PTR_ERR(priv->sclk);
 
-	ret = clk_prepare_enable(priv->sclk);
-	if (ret)
-		return ret;
-
 	priv->adap.timeout = msecs_to_jiffies(100);
 	priv->adap.retries = 5;
 	priv->adap.dev.parent = &pdev->dev;
@@ -397,26 +393,22 @@ static int em_i2c_probe(struct platform_device *pdev)
 
 	ret = platform_get_irq(pdev, 0);
 	if (ret < 0)
-		goto err_clk;
+		return ret;
 	priv->irq = ret;
 	ret = devm_request_irq(&pdev->dev, priv->irq, em_i2c_irq_handler, 0,
 				"em_i2c", priv);
 	if (ret)
-		goto err_clk;
+		return ret;
 
 	ret = i2c_add_adapter(&priv->adap);
 
 	if (ret)
-		goto err_clk;
+		return ret;
 
 	dev_info(&pdev->dev, "Added i2c controller %d, irq %d\n", priv->adap.nr,
 		 priv->irq);
 
 	return 0;
-
-err_clk:
-	clk_disable_unprepare(priv->sclk);
-	return ret;
 }
 
 static void em_i2c_remove(struct platform_device *dev)
@@ -424,7 +416,6 @@ static void em_i2c_remove(struct platform_device *dev)
 	struct em_i2c_device *priv = platform_get_drvdata(dev);
 
 	i2c_del_adapter(&priv->adap);
-	clk_disable_unprepare(priv->sclk);
 }
 
 static const struct of_device_id em_i2c_ids[] = {
-- 
2.39.0