pinctrl: renesas: rzg2l: 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().

While at it, use dev_err_probe() which filters -EPROBE_DEFER.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/a4a586337d692f0ca396b80d275ba634eb419593.1690058500.git.christophe.jaillet@wanadoo.fr
[geert: Make clk local to rzg2l_pinctrl_probe()]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

drivers/pinctrl/renesas/pinctrl-rzg2l.c

@@ -144,7 +144,6 @@ struct rzg2l_pinctrl {
 	const struct rzg2l_pinctrl_data	*data;
 	void __iomem			*base;
 	struct device			*dev;
-	struct clk			*clk;
 
 	struct gpio_chip		gpio_chip;
 	struct pinctrl_gpio_range	gpio_range;
@@ -1470,14 +1469,10 @@ static int rzg2l_pinctrl_register(struct rzg2l_pinctrl *pctrl)
 	return 0;
 }
 
-static void rzg2l_pinctrl_clk_disable(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int rzg2l_pinctrl_probe(struct platform_device *pdev)
 {
 	struct rzg2l_pinctrl *pctrl;
+	struct clk *clk;
 	int ret;
 
 	BUILD_BUG_ON(ARRAY_SIZE(rzg2l_gpio_configs) * RZG2L_PINS_PER_PORT >
@@ -1500,33 +1495,16 @@ static int rzg2l_pinctrl_probe(struct platform_device *pdev)
 	if (IS_ERR(pctrl->base))
 		return PTR_ERR(pctrl->base);
 
-	pctrl->clk = devm_clk_get(pctrl->dev, NULL);
-	if (IS_ERR(pctrl->clk)) {
-		ret = PTR_ERR(pctrl->clk);
-		dev_err(pctrl->dev, "failed to get GPIO clk : %i\n", ret);
-		return ret;
-	}
+	clk = devm_clk_get_enabled(pctrl->dev, NULL);
+	if (IS_ERR(clk))
+		return dev_err_probe(pctrl->dev, PTR_ERR(clk),
+				     "failed to enable GPIO clk\n");
 
 	spin_lock_init(&pctrl->lock);
 	spin_lock_init(&pctrl->bitmap_lock);
 
 	platform_set_drvdata(pdev, pctrl);
 
-	ret = clk_prepare_enable(pctrl->clk);
-	if (ret) {
-		dev_err(pctrl->dev, "failed to enable GPIO clk: %i\n", ret);
-		return ret;
-	}
-
-	ret = devm_add_action_or_reset(&pdev->dev, rzg2l_pinctrl_clk_disable,
-				       pctrl->clk);
-	if (ret) {
-		dev_err(pctrl->dev,
-			"failed to register GPIO clk disable action, %i\n",
-			ret);
-		return ret;
-	}
-
 	ret = rzg2l_pinctrl_register(pctrl);
 	if (ret)
 		return ret;