pinctrl: mediatek: pinctrl-mtk-common: Simplify with dev_err_probe()

Use the dev_err_probe() helper to simplify error handling during probe.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220308100956.2750295-12-wenst@chromium.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: AngeloGioacchino Del Regno

drivers/pinctrl/mediatek/pinctrl-mtk-common.c

@@ -1013,10 +1013,12 @@ static int mtk_eint_init(struct mtk_pinctrl *pctl, struct platform_device *pdev)
 	return mtk_eint_do_init(pctl->eint);
 }
 
+/* This is used as a common probe function */
 int mtk_pctrl_init(struct platform_device *pdev,
 		const struct mtk_pinctrl_devdata *data,
 		struct regmap *regmap)
 {
+	struct device *dev = &pdev->dev;
 	struct pinctrl_pin_desc *pins;
 	struct mtk_pinctrl *pctl;
 	struct device_node *np = pdev->dev.of_node, *node;
@@ -1030,10 +1032,9 @@ int mtk_pctrl_init(struct platform_device *pdev,
 	platform_set_drvdata(pdev, pctl);
 
 	prop = of_find_property(np, "pins-are-numbered", NULL);
-	if (!prop) {
-		dev_err(&pdev->dev, "only support pins-are-numbered format\n");
-		return -EINVAL;
-	}
+	if (!prop)
+		return dev_err_probe(dev, -EINVAL,
+				     "only support pins-are-numbered format\n");
 
 	node = of_parse_phandle(np, "mediatek,pctl-regmap", 0);
 	if (node) {
@@ -1044,8 +1045,7 @@ int mtk_pctrl_init(struct platform_device *pdev,
 	} else if (regmap) {
 		pctl->regmap1  = regmap;
 	} else {
-		dev_err(&pdev->dev, "Pinctrl node has not register regmap.\n");
-		return -EINVAL;
+		return dev_err_probe(dev, -EINVAL, "Cannot find pinctrl regmap.\n");
 	}
 
 	/* Only 8135 has two base addr, other SoCs have only one. */
@@ -1059,10 +1059,8 @@ int mtk_pctrl_init(struct platform_device *pdev,
 
 	pctl->devdata = data;
 	ret = mtk_pctrl_build_state(pdev);
-	if (ret) {
-		dev_err(&pdev->dev, "build state failed: %d\n", ret);
-		return -EINVAL;
-	}
+	if (ret)
+		return dev_err_probe(dev, ret, "build state failed\n");
 
 	pins = devm_kcalloc(&pdev->dev, pctl->devdata->npins, sizeof(*pins),
 			    GFP_KERNEL);
@@ -1083,10 +1081,9 @@ int mtk_pctrl_init(struct platform_device *pdev,
 
 	pctl->pctl_dev = devm_pinctrl_register(&pdev->dev, &pctl->pctl_desc,
 					       pctl);
-	if (IS_ERR(pctl->pctl_dev)) {
-		dev_err(&pdev->dev, "couldn't register pinctrl driver\n");
-		return PTR_ERR(pctl->pctl_dev);
-	}
+	if (IS_ERR(pctl->pctl_dev))
+		return dev_err_probe(dev, PTR_ERR(pctl->pctl_dev),
+				     "Couldn't register pinctrl driver\n");
 
 	pctl->chip = devm_kzalloc(&pdev->dev, sizeof(*pctl->chip), GFP_KERNEL);
 	if (!pctl->chip)