pinctrl: renesas: rzv2m: Use devm_clk_get_enabled() helper

Simplify clock handling by using the devm_clk_get_enabled() helper,
instead of open-coding the same operations.  Move the clock pointer from
the driver-private data to a local variable, as it is not needed outside
the .probe() callback.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/cca0b1795fd0335401bdf2be393ab84445e04095.1688396836.git.geert+renesas@glider.be

drivers/pinctrl/renesas/pinctrl-rzv2m.c

@@ -118,7 +118,6 @@ struct rzv2m_pinctrl {
 	const struct rzv2m_pinctrl_data	*data;
 	void __iomem			*base;
 	struct device			*dev;
-	struct clk			*clk;
 
 	struct gpio_chip		gpio_chip;
 	struct pinctrl_gpio_range	gpio_range;
@@ -1039,14 +1038,10 @@ static int rzv2m_pinctrl_register(struct rzv2m_pinctrl *pctrl)
 	return 0;
 }
 
-static void rzv2m_pinctrl_clk_disable(void *data)
-{
-	clk_disable_unprepare(data);
-}
-
 static int rzv2m_pinctrl_probe(struct platform_device *pdev)
 {
 	struct rzv2m_pinctrl *pctrl;
+	struct clk *clk;
 	int ret;
 
 	pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
@@ -1063,32 +1058,15 @@ static int rzv2m_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);
 
 	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, rzv2m_pinctrl_clk_disable,
-				       pctrl->clk);
-	if (ret) {
-		dev_err(pctrl->dev,
-			"failed to register GPIO clk disable action, %i\n",
-			ret);
-		return ret;
-	}
-
 	ret = rzv2m_pinctrl_register(pctrl);
 	if (ret)
 		return ret;