thermal/drivers/mediatek: Change clk_prepare_enable to devm_clk_get_enabled in mtk_thermal_probe

Use devm_clk_get_enabled to do automatic resource management.
Meanwhile, remove error handling labels in the probe function and
the whole remove function.

Signed-off-by: Kang Chen <void0red@hust.edu.cn>
Reviewed-by: Dongliang Mu <dzm91@hust.edu.cn>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20230419020749.621257-2-void0red@hust.edu.cn

drivers/thermal/mediatek/auxadc_thermal.c

@@ -1206,14 +1206,6 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 
 	mt->conf = of_device_get_match_data(&pdev->dev);
 
-	mt->clk_peri_therm = devm_clk_get(&pdev->dev, "therm");
-	if (IS_ERR(mt->clk_peri_therm))
-		return PTR_ERR(mt->clk_peri_therm);
-
-	mt->clk_auxadc = devm_clk_get(&pdev->dev, "auxadc");
-	if (IS_ERR(mt->clk_auxadc))
-		return PTR_ERR(mt->clk_auxadc);
-
 	mt->thermal_base = devm_platform_get_and_ioremap_resource(pdev, 0, NULL);
 	if (IS_ERR(mt->thermal_base))
 		return PTR_ERR(mt->thermal_base);
@@ -1272,16 +1264,18 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	ret = clk_prepare_enable(mt->clk_auxadc);
-	if (ret) {
+	mt->clk_auxadc = devm_clk_get_enabled(&pdev->dev, "auxadc");
+	if (IS_ERR(mt->clk_auxadc)) {
+		ret = PTR_ERR(mt->clk_auxadc);
 		dev_err(&pdev->dev, "Can't enable auxadc clk: %d\n", ret);
 		return ret;
 	}
 
-	ret = clk_prepare_enable(mt->clk_peri_therm);
-	if (ret) {
+	mt->clk_peri_therm = devm_clk_get_enabled(&pdev->dev, "therm");
+	if (IS_ERR(mt->clk_peri_therm)) {
+		ret = PTR_ERR(mt->clk_peri_therm);
 		dev_err(&pdev->dev, "Can't enable peri clk: %d\n", ret);
-		goto err_disable_clk_auxadc;
+		return ret;
 	}
 
 	mtk_thermal_turn_on_buffer(mt, apmixed_base);
@@ -1305,38 +1299,18 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 
 	tzdev = devm_thermal_of_zone_register(&pdev->dev, 0, mt,
 					      &mtk_thermal_ops);
-	if (IS_ERR(tzdev)) {
-		ret = PTR_ERR(tzdev);
-		goto err_disable_clk_peri_therm;
-	}
+	if (IS_ERR(tzdev))
+		return PTR_ERR(tzdev);
 
 	ret = devm_thermal_add_hwmon_sysfs(&pdev->dev, tzdev);
 	if (ret)
 		dev_warn(&pdev->dev, "error in thermal_add_hwmon_sysfs");
 
 	return 0;
-
-err_disable_clk_peri_therm:
-	clk_disable_unprepare(mt->clk_peri_therm);
-err_disable_clk_auxadc:
-	clk_disable_unprepare(mt->clk_auxadc);
-
-	return ret;
-}
-
-static int mtk_thermal_remove(struct platform_device *pdev)
-{
-	struct mtk_thermal *mt = platform_get_drvdata(pdev);
-
-	clk_disable_unprepare(mt->clk_peri_therm);
-	clk_disable_unprepare(mt->clk_auxadc);
-
-	return 0;
 }
 
 static struct platform_driver mtk_thermal_driver = {
 	.probe = mtk_thermal_probe,
-	.remove = mtk_thermal_remove,
 	.driver = {
 		.name = "mtk-thermal",
 		.of_match_table = mtk_thermal_of_match,