watchdog: pic32-wdt: 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/4335b4201b535ebc749a98bad0b99e3cb5317c39.1672496563.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/pic32-wdt.c

@@ -162,11 +162,6 @@ static const struct of_device_id pic32_wdt_dt_ids[] = {
 };
 MODULE_DEVICE_TABLE(of, pic32_wdt_dt_ids);
 
-static void pic32_clk_disable_unprepare(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int pic32_wdt_drv_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
@@ -186,22 +181,12 @@ static int pic32_wdt_drv_probe(struct platform_device *pdev)
 	if (!wdt->rst_base)
 		return -ENOMEM;
 
-	wdt->clk = devm_clk_get(dev, NULL);
+	wdt->clk = devm_clk_get_enabled(dev, NULL);
 	if (IS_ERR(wdt->clk)) {
 		dev_err(dev, "clk not found\n");
 		return PTR_ERR(wdt->clk);
 	}
 
-	ret = clk_prepare_enable(wdt->clk);
-	if (ret) {
-		dev_err(dev, "clk enable failed\n");
-		return ret;
-	}
-	ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare,
-				       wdt->clk);
-	if (ret)
-		return ret;
-
 	if (pic32_wdt_is_win_enabled(wdt)) {
 		dev_err(dev, "windowed-clear mode is not supported.\n");
 		return -ENODEV;