watchdog: armada_37xx: Use devm_clk_get_enabled() helper

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>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/ccb096879a1309b9918ae956d6bdb9668c69bcda.1672473617.git.christophe.jaillet@wanadoo.frSigned-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

drivers/watchdog/armada_37xx_wdt.c

@@ -246,11 +246,6 @@ static const struct watchdog_ops armada_37xx_wdt_ops = {
 	.get_timeleft = armada_37xx_wdt_get_timeleft,
 };
 
-static void armada_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int armada_37xx_wdt_probe(struct platform_device *pdev)
 {
 	struct armada_37xx_watchdog *dev;
@@ -280,18 +275,10 @@ static int armada_37xx_wdt_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	/* init clock */
-	dev->clk = devm_clk_get(&pdev->dev, NULL);
+	dev->clk = devm_clk_get_enabled(&pdev->dev, NULL);
 	if (IS_ERR(dev->clk))
 		return PTR_ERR(dev->clk);
 
-	ret = clk_prepare_enable(dev->clk);
-	if (ret)
-		return ret;
-	ret = devm_add_action_or_reset(&pdev->dev,
-				       armada_clk_disable_unprepare, dev->clk);
-	if (ret)
-		return ret;
-
 	dev->clk_rate = clk_get_rate(dev->clk);
 	if (!dev->clk_rate)
 		return -EINVAL;