watchdog: loongson1: 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/624106aa86ef7e49f16b11b229528eabd63de8f7.1672485257.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: tititiou36

drivers/watchdog/loongson1_wdt.c

@@ -79,11 +79,6 @@ static const struct watchdog_ops ls1x_wdt_ops = {
 	.set_timeout = ls1x_wdt_set_timeout,
 };
 
-static void ls1x_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int ls1x_wdt_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -100,20 +95,10 @@ static int ls1x_wdt_probe(struct platform_device *pdev)
 	if (IS_ERR(drvdata->base))
 		return PTR_ERR(drvdata->base);
 
-	drvdata->clk = devm_clk_get(dev, pdev->name);
+	drvdata->clk = devm_clk_get_enabled(dev, pdev->name);
 	if (IS_ERR(drvdata->clk))
 		return PTR_ERR(drvdata->clk);
 
-	err = clk_prepare_enable(drvdata->clk);
-	if (err) {
-		dev_err(dev, "clk enable failed\n");
-		return err;
-	}
-	err = devm_add_action_or_reset(dev, ls1x_clk_disable_unprepare,
-				       drvdata->clk);
-	if (err)
-		return err;
-
 	clk_rate = clk_get_rate(drvdata->clk);
 	if (!clk_rate)
 		return -EINVAL;