pinctrl: mediatek: common-v1: Add common probe function

As a preparation to cleanup the probe mechanism of mediatek pinctrl
drivers that are using the v1 controller, add a common probe function
to this driver.
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20220222111144.20796-3-angelogioacchino.delregno@collabora.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

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

@@ -1117,3 +1117,14 @@ int mtk_pctrl_init(struct platform_device *pdev,
 	gpiochip_remove(pctl->chip);
 	return ret;
 }
+
+int mtk_pctrl_common_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	const struct mtk_pinctrl_devdata *data = device_get_match_data(dev);
+
+	if (!data)
+		return -ENODEV;
+
+	return mtk_pctrl_init(pdev, data, NULL);
+}

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

@@ -277,6 +277,8 @@ int mtk_pctrl_init(struct platform_device *pdev,
 		const struct mtk_pinctrl_devdata *data,
 		struct regmap *regmap);
 
+int mtk_pctrl_common_probe(struct platform_device *pdev);
+
 int mtk_pctrl_spec_pull_set_samereg(struct regmap *regmap,
 		const struct mtk_pin_spec_pupd_set_samereg *pupd_infos,
 		unsigned int info_num, unsigned int pin,