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From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] watchdog: visconti: Use devm_clk_get_enabled() helper
Date: Fri, 30 Dec 2022 17:32:42 +0100	[thread overview]
Message-ID: <13e8cdf17556da111d1d98a8fe0b1dc1c78007e2.1672417940.git.christophe.jaillet@wanadoo.fr> (raw)

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

This simplifies the code and avoids the need of a dedicated function used
with devm_add_action_or_reset().

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/watchdog/visconti_wdt.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/watchdog/visconti_wdt.c b/drivers/watchdog/visconti_wdt.c
index 83ef55e66ca8..cef0794708e7 100644
--- a/drivers/watchdog/visconti_wdt.c
+++ b/drivers/watchdog/visconti_wdt.c
@@ -112,11 +112,6 @@ static const struct watchdog_ops visconti_wdt_ops = {
 	.set_timeout	= visconti_wdt_set_timeout,
 };
 
-static void visconti_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int visconti_wdt_probe(struct platform_device *pdev)
 {
 	struct watchdog_device *wdev;
@@ -134,20 +129,10 @@ static int visconti_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->base))
 		return PTR_ERR(priv->base);
 
-	clk = devm_clk_get(dev, NULL);
+	clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(clk))
 		return dev_err_probe(dev, PTR_ERR(clk), "Could not get clock\n");
 
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "Could not enable clock\n");
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(dev, visconti_clk_disable_unprepare, clk);
-	if (ret)
-		return ret;
-
 	clk_freq = clk_get_rate(clk);
 	if (!clk_freq)
 		return -EINVAL;
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
	Guenter Roeck <linux@roeck-us.net>,
	Nobuhiro Iwamatsu <nobuhiro1.iwamatsu@toshiba.co.jp>
Cc: linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
	Christophe JAILLET <christophe.jaillet@wanadoo.fr>,
	linux-watchdog@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH] watchdog: visconti: Use devm_clk_get_enabled() helper
Date: Fri, 30 Dec 2022 17:32:42 +0100	[thread overview]
Message-ID: <13e8cdf17556da111d1d98a8fe0b1dc1c78007e2.1672417940.git.christophe.jaillet@wanadoo.fr> (raw)

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

This simplifies the code and avoids the need of a dedicated function used
with devm_add_action_or_reset().

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/watchdog/visconti_wdt.c | 17 +----------------
 1 file changed, 1 insertion(+), 16 deletions(-)

diff --git a/drivers/watchdog/visconti_wdt.c b/drivers/watchdog/visconti_wdt.c
index 83ef55e66ca8..cef0794708e7 100644
--- a/drivers/watchdog/visconti_wdt.c
+++ b/drivers/watchdog/visconti_wdt.c
@@ -112,11 +112,6 @@ static const struct watchdog_ops visconti_wdt_ops = {
 	.set_timeout	= visconti_wdt_set_timeout,
 };
 
-static void visconti_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int visconti_wdt_probe(struct platform_device *pdev)
 {
 	struct watchdog_device *wdev;
@@ -134,20 +129,10 @@ static int visconti_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(priv->base))
 		return PTR_ERR(priv->base);
 
-	clk = devm_clk_get(dev, NULL);
+	clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(clk))
 		return dev_err_probe(dev, PTR_ERR(clk), "Could not get clock\n");
 
-	ret = clk_prepare_enable(clk);
-	if (ret) {
-		dev_err(dev, "Could not enable clock\n");
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(dev, visconti_clk_disable_unprepare, clk);
-	if (ret)
-		return ret;
-
 	clk_freq = clk_get_rate(clk);
 	if (!clk_freq)
 		return -EINVAL;
-- 
2.34.1


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             reply	other threads:[~2022-12-30 16:33 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-12-30 16:32 Christophe JAILLET [this message]
2022-12-30 16:32 ` [PATCH] watchdog: visconti: Use devm_clk_get_enabled() helper Christophe JAILLET
2022-12-31  6:07 ` Guenter Roeck
2022-12-31  6:07   ` Guenter Roeck

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